Author: "Sabata, F." - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"Sabata, F."' showing total 136 results

Start Over Author "Sabata, F."

136 results on '"Sabata, F."'

1. Imaging and Studying Standing Waves with a Homemade Melde-Type Apparatus and Information and Communication Technology (ICT)

Author: Bozzo, G., de Sabata, F., Pistori, S., and Monti, F.
Abstract: Wave physics phenomena can be observed in everyday life and represent a fundamental prerequisite to many domains of classical and modern physics. Lots of studies demonstrate that novices have to face important learning difficulties in approaching this topic. The study of string vibrations' modes allows an educational introduction to basic concepts, but common laboratory approaches employ dedicated experimental setups usually requiring some expensive components (wave or vibration generators, motion detectors) that often are not present in school laboratories. The problem of low-cost solutions for the Melde apparatus has been addressed many years ago. Some recent papers propose low-cost solutions in which standing waves on a Slinky spring obtained with non-reproducible hand movements are analyzed by means of video analysis software. In this context, we projected a modern revisitation of the historical experiment proposed for the first time by Melde in 1859, employing low-cost materials and commonly used information and communication technology (ICT) devices in order to generate and analyze standing waves on a string (see next section). This experimental setup was proposed to a group of 26 students (17-18 years old) in the fourth year of an Italian high school. Students were involved in four sessions (about four hours each) of inquiry-based laboratorial activities, in which they recorded various standing wave configurations on a string with their smartphones and analyzed the obtained videos using the freeware Tracker, whose potential value is well known in literature. The experimental setup is described and an example of data analysis and obtained results is shown. Finally, students were asked to develop their own Melde-type apparatus; in the last section we present a very interesting alternative solution developed by a group of them, which offers almost the same educational features on a reduced scale using even simpler components.
Published: 2019
Full Text: View/download PDF

2. Spectral Energy Distribution of Markarian 501: Quiescent State vs. Extreme Outburst

Author: The VERITAS Collaboration, Acciari, V. A., Arlen, T., Aune, T., Beilicke, M., Benbow, W., Böttcher, M., Boltuch, D., Bradbury, S. M., Buckley, J. H., Bugaev, V., Cannon, A., Cesarini, A., Ciupik, L., Cui, W., Dickherber, R., Duke, C., Errando, M., Falcone, A., Finley, J. P., Finnegan, G., Fortson, L., Furniss, A., Galante, N., Gall, D., Godambe, S., Grube, J., Guenette, R., Gyuk, G., Hanna, D., Holder, J., Huang, D., Hui, C. M., Humensky, T. B., Imran, A., Kaaret, P., Karlsson, N., Kertzman, M., Kieda, D., Konopelko, A., Krawczynski, H., Krennrich, F., Madhavan, A. S, Maier, G., McArthur, S., McCann, A., Moriarty, P., Ong, R. A., Otte, A. N., Pandel, D., Perkins, J. S., Pichel, A., Pohl, M., Quinn, J., Ragan, K., Reyes, L. C., Reynolds, P. T., Roache, E., Rose, H. J., Schroedter, M., Sembroski, G. H., Steele, D., Swordy, S. P., Theiling, M., Thibadeau, S., Varlotta, A., Vassiliev, V. V., Vincent, S., Wakely, S. P., Ward, J. E., Weekes, T. C., Weinstein, A., Weisgarber, T., Williams, D. A., Wood, M., Zitzer, B., Collaboration, The MAGIC, Aleksić, J., Antonelli, L. A., Antoranz, P., Backes, M., Barrio, J. A., Bastieri, D., González, J. Becerra, Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Camara, M., Carmona, E., Carosi, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. De Cea, De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. Delgado, Ortega, A. Diago, Doert, M., Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Ferenc, D., Fonseca, M. V., Font, L., López, R. J. García, Garczarczyk, M., Gaug, M., Giavitto, G., Godinović, N., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., Krause, J., La Barbera, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Makariev, M., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moralejo, A., Nieto, D., Nilsson, K., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Pochon, J., Prada, F., Moroni, P. G. Prada, Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Reinthal, R., Rhode, W., Ribó, M., Rico, J., Rissi, M., Rügamer, S., Saggion, A., Saito, K., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Storz, J., Strah, N., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Torres, D. F., Vankov, H., Wagner, R. M., Weitzel, Q., Zabalza, V., Zandanel, F., Zanin, R., Paneque, D., and Hayashida, M.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The very high energy (VHE; E > 100 GeV) blazar Markarian 501 has a well-studied history of extreme spectral variability and is an excellent laboratory for studying the physical processes within the jets of active galactic nuclei. However, there are few detailed multiwavelength studies of Markarian 501 during its quiescent state, due to its low luminosity. A short-term multiwavelength study of Markarian 501 was coordinated in March 2009, focusing around a multi-day observation with the Suzaku X-ray satellite and including {\gamma}-ray data from VERITAS, MAGIC, and the Fermi Gamma-ray Space Telescope with the goal of providing a well-sampled multiwavelength baseline measurement of Markarian 501 in the quiescent state. The results of these quiescent-state observations are compared to the historically extreme outburst of April 16, 1997, with the goal of examining variability of the spectral energy distribution between the two states. The derived broadband spectral energy distribution shows the characteristic double-peaked profile. We find that the X-ray peak shifts by over two orders of magnitude in photon energy between the two flux states while the VHE peak varies little. The limited shift in the VHE peak can be explained by the transition to the Klein-Nishina regime. Synchrotron self-Compton models are matched to the data and the implied Klein-Nishina effects are explored., Comment: Accepted for publication in ApJ, 25 pages, 6 figures, corresponding authors: Daniel Gall daniel-d-gall@uiowa.edu and Wei Cui cui@purdue.edu
Published: 2010
Full Text: View/download PDF

3. Observations of the Blazar 3C 66A with the MAGIC Telescopes in Stereoscopic Mode

Author: The MAGIC Collaboration, Aleksić, J., Antonelli, L. A., Antoranz, P., Backes, M., Barrio, J. A., Bastieri, D., González, J. Becerra, Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Camara, M., Cañellas, A., Carmona, E., Carosi, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Cossio, L., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. De Cea, De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. Delgado, Ortega, A. Diago, Doert, M., Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fonseca, M. V., Font, L., López, R. J. García, Garczarczyk, M., Garrido, D., Giavitto, G., Godinović, N., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Huber, B., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., Krause, J., La Barbera, A., Lelas, D., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Makariev, M., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moralejo, A., Nieto, D., Nilsson, K., Orito, R., Oya, I., Paoletti, R., Pardo, S., Paredes, J. M., Partini, S., Pasanen, M., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Pochon, J., Prada, F., Moroni, P. G. Prada, Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Reinthal, R., Rhode, W., Ribó, M., Rico, J., Rügamer, S., Saggion, A., Saito, K., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Storz, J., Strah, N., Struebig, J. C., Surić, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Thom, M., Torres, D. F., Vankov, H., Vogler, P., Wagner, R. M., Weitzel, Q., Zabalza, V., Zandanel, F., and Zanin, R.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We report new observations of the intermediate-frequency peaked BL Lacertae object 3C 66A with the MAGIC telescopes. The data sample we use were taken in 2009 December and 2010 January, and comprises 2.3 hr of good quality data in stereoscopic mode. In this period, we find a significant signal from the direction of the blazar 3C 66A. The new MAGIC stereoscopic system is shown to play an essential role for the separation between 3C 66A and the nearby radio galaxy 3C 66B, which is at a distance of only $6^\prime$. The derived integral flux above $100\eh{GeV}$ is 8.3% of Crab Nebula flux and the energy spectrum is reproduced by a power law of photon index $3.64 \pm 0.39_{\rm stat} \pm 0.25_{\rm sys}$. Within errors, this is compatible with the one derived by VERITAS in 2009. From the spectra corrected for absorption by the extragalactic background light, we only find small differences between the four models that we applied, and constrain the redshift of the blazar to $z < 0.68$., Comment: Accepted for publication in ApJ
Published: 2010
Full Text: View/download PDF

4. Detection of very high energy gamma-ray emission from the Perseus cluster head-tail galaxy IC 310 by the MAGIC telescopes

Author: MAGIC Collaboration, Aleksić, J., Antonelli, L. A., Antoranz, P., Backes, M., Barrio, J. A., Bastieri, D., González, J. Becerra, Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Camara, M., Cañellas, A., Carmona, E., Carosi, A., Colin, P., Colombo, E., Contreras, J. L., Cossio, L., Cortina, J., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. De Cea, De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. Delgado, Ortega, A. Diago, Doert, M., Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fonseca, M. V., Font, L., López, R. J. García, Garczarczyk, M., Giavitto, G., Godinović, N., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., Krause, J., La Barbera, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Makariev, M., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moralejo, A., Nieto, D., Nilsson, K., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Pochon, J., Prada, F., Moroni, P. G. Prada, Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Reinthal, R., Rhode, W., Ribó, M., Rico, J., Rügamer, S., Saggion, A., Saito, K., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Storz, J., Strah, N., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Torres, D. F., Vankov, H., Wagner, R. M., Weitzel, Q., Zabalza, V., Zandanel, F., Zanin, R., Neronov, A., Pfrommer, C., Pinzke, A., and Semikoz, D. V.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We report on the detection with the MAGIC telescopes of very high energy gamma-rays from IC 310, a head-tail radio galaxy in the Perseus galaxy cluster, observed during the interval November 2008 to February 2010. The Fermi satellite has also detected this galaxy. The source is detected by MAGIC at a high statistical significance of 7.6sigma in 20.6 hr of stereo data. The observed spectral energy distribution is flat with a differential spectral index of -2.00 \pm 0.14. The mean flux above 300 GeV, between October 2009 and February 2010, (3.1 \pm 0.5)x10^{-12} cm^{-2} s^{-1}, corresponds to (2.5 \pm 0.4)% of Crab Nebula units. Only an upper limit, of 1.9% of Crab Nebula units above 300 GeV, was obtained with the 2008 data. This, together with strong hints (>3sigma) of flares in the middle of October and November 2009, implies that the emission is variable. The MAGIC results favour a scenario with the very high energy emission originating from the inner jet close to the central engine. More complicated models than a simple one-zone SSC scenario, e.g. multi-zone SSC, external Compton or hadronic, may be required to explain the very flat spectrum and its extension over more than three orders of magnitude in energy., Comment: 6 pages, 5 figures, submitted to ApJL
Published: 2010
Full Text: View/download PDF

5. MAGIC Upper Limits for two Milagro-detected, Bright Fermi Sources in the Region of SNR G65.1+0.6

Author: Aleksić, J., Antonelli, L. A., Antoranz, P., Backes, M., Barrio, J. A., Bastieri, D., González, J. Becerra, Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Camara, M., Carmona, E., Carosi, A., Colin, P., Contreras, J. L., Cortina, J., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. De Cea, De Lotto, B., De Maria, M., De Sabata, F., DelgadoMendez, C., Ortega, A. Diago, Doert, M., Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fonseca, M. V., Font, L., López, R. J. García, Garczarczyk, M., Gaug, M., Giavitto, G., Godinović, N., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., Krause, J., La Barbera, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moralejo, A., Nieto, D., Nilsson, K., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Pochon, J., Prada, F., Moroni, P. G. Prada, Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Reinthal, R., Rhode, W., Ribó, M., Rico, J., Rissi, M., Rügamer, S., Saggion, A., Saito, K., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Storz, J., Strah, N., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Torres, D. F., Vankov, H., Wagner, R. M., Weitzel, Q., Zabalza, V., Zandanel, F., and Zanin, R.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We report on the observation of the region around supernova remnant G65.1+0.6 with the stand-alone MAGIC-I telescope. This region hosts the two bright GeV gamma-ray sources 1FGL J1954.3+2836 and 1FGL J1958.6+2845. They are identified as GeV pulsars and both have a possible counterpart detected at about 35 TeV by the Milagro observatory. MAGIC collected 25.5 hours of good quality data, and found no significant emission in the range around 1 TeV. We therefore report differential flux upper limits, assuming the emission to be point-like (<0.1 deg) or within a radius of 0.3 deg. In the point-like scenario, the flux limits around 1 TeV are at the level of 3 % and 2 % of the Crab Nebula flux, for the two sources respectively. This implies that the Milagro emission is either extended over a much larger area than our point spread function, or it must be peaked at energies beyond 1 TeV, resulting in a photon index harder than 2.2 in the TeV band., Comment: 8 pages, 3 figures, 1 table
Published: 2010
Full Text: View/download PDF

6. Magic constraints on Gamma-ray emission from Cygnus X-3

Author: Aleksić, J., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Barrio, J. A., Bastieri, D., González, J. Becerra, Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britzger, D., Camara, M., Carmona, E., Carosi, A., Colin, P., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. De Cea, De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. Delgado, Doert, M., Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fonseca, M. V., Font, L., López, R. J. García, Garczarczyk, M., Gaug, M., Godinovic, N., Göebel, F., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Hsu, C. C., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Orito, R., Oya, I., Paiano, S., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M, Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Rissi, M, Rügamer, S., Saggion, A., Saito, K., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Torres, D. F., Vankov, H., Wagner, R. M., Weitzel, Q., Zabalza, V., Zandanel, F., Zanin, R., Bulgarelli, A., Max-Moerbeck, W., Piano, G., Pooley, G., Readhead, A. C. S., Richards, J. L., Sabatini, S., Striani, E., Tavani, M., and Trushkin, S.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Cygnus X-3 is a microquasar consisting of an accreting compact object orbiting around a Wolf-Rayet star. It has been detected at radio frequencies and up to high-energy gamma rays (above 100 MeV). However, many models also predict a very high energy (VHE) emission (above hundreds of GeV) when the source displays relativistic persistent jets or transient ejections. Therefore, detecting such emission would improve the understanding of the jet physics. The imaging atmospheric Cherenkov telescope MAGIC observed Cygnus X-3 for about 70 hours between 2006 March and 2009 August in different X-ray/radio spectral states and also during a period of enhanced gamma-ray emission. MAGIC found no evidence for a VHE signal from the direction of the microquasar. An upper limit to the integral flux for energies higher than 250 GeV has been set to 2.2 x 10-12 photons cm-2 s-1 (95% confidence level). This is the best limit so far to the VHE emission from this source. The non-detection of a VHE signal during the period of activity in the high-energy band sheds light on the location of the possible VHE radiation favoring the emission from the innermost region of the jets, where absorption is significant. The current and future generations of Cherenkov telescopes may detect a signal under precise spectral conditions., Comment: 14 pages, 11 figures, This manuscript has been accepted by ApJ (2010)
Published: 2010
Full Text: View/download PDF

7. MAGIC observation of the GRB080430 afterglow

Author: MAGIC Collaboration, Aleksić, J., Anderhub, H., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Balestra, S., Barrio, J. A., Bastieri, D., González, J. Becerra, Becker, J. K., Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Bock, R. K., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britzger, D., Camara, M., Carmona, E., Carosi, A., Colin, P., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. de Cea, Reyes, R. De los, De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. Delgado, Doert, M., Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fernández, E., Firpo, R., Fonseca, M. V., Font, L., Galante, N., López, R. J. García, Garczarczyk, M., Gaug, M., Godinovic, N., Goebel, F., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Hsu, C. C., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Rissi, M., Rügamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Strah, N., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Torres, D. F., Turini, N., Vankov, H., Wagner, R. M., Zabalza, V., Zandanel, F., Zanin, R., Zapatero, J., and de Ugarte-Postigo, A.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Context: Gamma-ray bursts are cosmological sources emitting radiation from the gamma-rays to the radio band. Substantial observational efforts have been devoted to the study of gamma-ray bursts during the prompt phase, i.e. the initial burst of high-energy radiation, and during the long-lasting afterglows. In spite of many successes in interpreting these phenomena, there are still several open key questions about the fundamental emission processes, their energetics and the environment. Aim: Independently of specific gamma-ray burst theoretical recipes, spectra in the GeV/TeV range are predicted to be remarkably simple, being satisfactorily modeled with power-laws, and therefore offer a very valuable tool to probe the extragalactic background light distribution. Furthermore, the simple detection of a component at very-high energies, i.e. at $\sim 100$\,GeV, would solve the ambiguity about the importance of various possible emission processes, which provide barely distinguishable scenarios at lower energies. Methods: We used the results of the MAGIC telescope observation of the moderate resdhift ($z\sim0.76$) \object{GRB\,080430} at energies above about 80\,GeV, to evaluate the perspective for late-afterglow observations with ground based GeV/TeV telescopes. Results: We obtained an upper limit of $F_{\rm 95%\,CL} = 5.5 \times 10^{-11}$\,erg\,cm$^{-2}$\,s$^{-1}$ for the very-high energy emission of \object{GRB\,080430}, which cannot set further constraints on the theoretical scenarios proposed for this object also due to the difficulties in modeling the low-energy afterglow. Nonetheless, our observations show that Cherenkov telescopes have already reached the required sensitivity to detect the GeV/TeV emission of GRBs at moderate redshift ($z \lesssim 0.8$), provided the observations are carried out at early times, close to the onset of their afterglow phase., Comment: 6 pages, 1 figure. Astronomy & Astrophysics, in press. Revision affects only the author list.
Published: 2010
Full Text: View/download PDF

8. Search for an extended VHE gamma-ray emission from Mrk 421 and Mrk 501 with the MAGIC Telescope

Author: MAGIC Collaboration, Aleksić, J., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Barrio, J. A., Bastieri, D., González, J. Becerra, Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britzger, D., Camara, M., Carmona, E., Carosi, A., Colin, P., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. De Cea, Reyes, R. De los, De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. Delgado, Doert, M., Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fonseca, M. V., Font, L., López, R. J. García, Garczarczyk, M., Gaug, M., Godinovic, N., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Hsu, C. C., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Orito, R., Oya, I., Paiano, S., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Rissi, M., Rügamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Torres, D. F., Vankov, H., Wagner, R. M., Weitzel, Q., Zabalza, V., Zandanel, F., Zanin, R., Neronov, A., and Semikoz, D. V.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Context: Part of the very high energy $\gamma$-ray radiation coming from extragalactic sources is absorbed through the pair production process on the extragalactic background light photons. Extragalactic magnetic fields alter the trajectories of these cascade pairs and, in turn, convert cosmic background photons to gamma-ray energies by inverse Compton scattering. These secondary photons can form an extended halo around bright VHE sources. Aims: We searched for an extended emission around the bright blazars Mrk 421 and Mrk 501 using the MAGIC telescope data. Methods: If extended emission is present, the angular distribution of reconstructed gamma-ray arrival directions around the source is broader than for a point-like source. In the analysis of a few tens of hours of observational data taken from Mrk 421 and Mrk 501 we used a newly developed method that provides better angular resolution. This method is based on the usage of multidimensional decision trees. Comparing the measured shapes of angular distributions with those expected from a point-like source one can detect or constrain possible extended emission around the source. We also studied the influence of different types of systematic errors on the shape of the distribution of reconstructed gamma-ray arrival directions for a point source. Results: We present upper limits for an extended emission calculated for both sources for various source extensions and emission profiles. We discuss possible constraints on the extragalactic magnetic fields strength. We obtain upper limits on the extended emission around the Mrk~421 (Mrk~501) on the level of < 5% (< 4%) of the Crab Nebula flux above the energy threshold of 300 GeV. Using these results we discuss possible constraints on the extragalactic magnetic fields strength around a few times $10^{-15}$~G., Comment: 8 pages, 9 figures, accepted for publication in A&A
Published: 2010
Full Text: View/download PDF

9. Gamma-ray excess from a stacked sample of high- and intermediate-frequency peaked blazars observed with the MAGIC telescope

Author: MAGIC Collaboration, Aleksić, J., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Barrio, J. A., Bastieri, D., González, J. Becerra, Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britzger, D., Camara, M., Carmona, E., Carosi, A., Colin, P., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. De Cea, Reyes, R. De los, De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. Delgado, Doert, M., Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fonseca, M. V., Font, L., López, R. J. García, Garczarczyk, M., Gaug, M., Godinovic, N., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Hsu, C. C., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E, Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Orito, R., Oya, I., Paiano, S., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Rissi, M., Rügamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J, Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Tibolla, O., Torres, D. F., Vankov, H., Wagner, R. M., Weitzel, Q., Zabalza, V, Zandanel, F., and Zanin, R.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Between 2004 and 2009 a sample of 28 X-ray selected high- and intermediate-frequency peaked blazars with a X-ray flux larger than 2 uJy at 1 keV in the redshift range from 0.018 to 0.361 was observed with the MAGIC telescope at energies above 100 GeV. Seven among them were detected and the results of these observations are discussed elsewhere. Here we concentrate on the remaining 21 blazars which were not detected during this observation campaign and present the 3 sigma (99.7 %) confidence upper limits on their flux. The individual flux upper limits lie between 1.6 % and 13.6 % of the integral flux from the Crab Nebula. Applying a stacking method to the sample of non-detections with a total of 394.1 hours exposure time, we find evidence for an excess with a cumulative significance of 4.9 standard deviations. It is not dominated by individual objects or flares, but increases linearly with the observation time as for a constant source with an integral flux level of ~1.5 % of that observed from the Crab Nebula above 150 GeV., Comment: 14 pages, 6 figures, accepted by ApJ
Published: 2010
Full Text: View/download PDF

10. MAGIC TeV Gamma-Ray Observations of Markarian 421 during Multiwavelength Campaigns in 2006

Author: MAGIC Collaboration, Aleksić, J., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Balestra, S., Barrio, J. A., Bastieri, D., González, J. Becerra, Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Bock, R. K., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britzger, D., Camara, M., Carmona, E., Carosi, A., Colin, P., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. De Cea, Mendez, C. Delgado, Reyes, R. De los, De Lotto, B., De Maria, M., De Sabata, F., Doert, M., Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fonseca, M. V., Font, L., López, R. J. García, Garczarczyk, M., Gaug, M., Godinovic, N., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Hsu, C. C., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Orito, R., Oya, I., Paiano, S., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Rissi, M., Rügamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Torres, D. F., Vankov, H., Wagner, R. M., Zabalza, V., Zandanel, F., and Zanin, R.
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The Major Atmospheric Gamma Imaging Cerenkov (MAGIC) telescope participated in three multiwavelength (MWL) campaigns, observing the blazar Markarian (Mkn) 421 during the nights of 2006 April 28, 29, and 2006 June 14. We analyzed the corresponding MAGIC very-high energy observations during 9 nights from 2006 April 22 to 30 and on 2006 June 14. We inferred light curves with sub-day resolution and night-by-night energy spectra. A strong gamma-ray signal was detected from Mkn 421 on all observation nights. The flux (E > 250 GeV) varied on night-by-night basis between (0.92+-0.11)10^-10 cm^-2 s^-1 (0.57 Crab units) and (3.21+-0.15)10^-10 cm^-2 s^-1 (2.0 Crab units) in 2006 April. There is a clear indication for intra-night variability with a doubling time of 36+-10(stat) minutes on the night of 2006 April 29, establishing once more rapid flux variability for this object. For all individual nights gamma-ray spectra could be inferred, with power-law indices ranging from 1.66 to 2.47. We did not find statistically significant correlations between the spectral index and the flux state for individual nights. During the June 2006 campaign, a flux substantially lower than the one measured by the Whipple 10-m telescope four days later was found. Using a log-parabolic power law fit we deduced for some data sets the location of the spectral peak in the very-high energy regime. Our results confirm the indications of rising peak energy with increasing flux, as expected in leptonic acceleration models., Comment: 11 pages, 7 figures, accepted for publication by Astron. Astrophys
Published: 2010
Full Text: View/download PDF

11. Simultaneous multi-frequency observation of the unknown redshift blazar PG 1553+113 in March-April 2008

Author: MAGIC Collaboration, Aleksić, J., Anderhub, H., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Balestra, S., Barrio, J. A., Bastieri, D., González, J. Becerra, Becker, J. K., Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Bock, R. K., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britzger, D., Camara, M., Carmona, E., Carosi, A., Colin, P., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. de Cea, Reyes, R. De los, De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. Delgado, Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fernández, E., Firpo, R., Fonseca, M. V., Font, L., Galante, N., López, R. J. García, Garczarczyk, M., Gaug, M., Godinovic, N., Goebel, F., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Hsu, C. C., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Rissi, M., Rügamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Strah, N., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Torres, D. F., Turini, N., Vankov, H., Wagner, R. M., Zabalza, V., Zandanel, F., Zanin, R., Zapatero, J., Pian, E., Bianchin, V., D'Ammando, F., Di Cocco, G., Fugazza, D., Ghisellini, G., Kurtanidze, O. M., Raiteri, C. M., Tosti, G., Treves, A., Vercellone, S., and Villata, M.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The blazar PG 1553+113 is a well known TeV gamma-ray emitter. In this paper, we determine its spectral energy distribution using simultaneous multi-frequency data in order to study its emission processes. An extensive campaign was carried out between March and April 2008, where optical, X-ray, high-energy (HE) gamma-ray, and very-high-energy (VHE) gamma-ray data were obtained with the KVA, Abastumani, REM, RossiXTE/ASM, AGILE and MAGIC telescopes, respectively. This is the first simultaneous broad-band (i.e., HE+VHE) gamma-ray observation, though AGILE did not detect the source. We combine data to derive source's spectral energy distribution and interpret its double peaked shape within the framework of a synchrotron self compton model, Comment: 5 pages, 2 figures, published
Published: 2009
Full Text: View/download PDF

12. Correlated X-ray and Very High Energy emission in the gamma-ray binary LS I +61 303

Author: The MAGIC Collaboration, Anderhub, H., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Balestra, S., Barrio, J. A., Bastieri, D., González, J. Becerra, Becker, J. K., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Bigas, O. Blanch, Bock, R. K., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britzger, D., Camara, M., Carmona, E., Carosi, A., Colin, P., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. de Cea, Reyes, R. De los, De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. Delgado, Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fernández, E., Firpo, R., Fonseca, M. V., Font, L., Galante, N., López, R. J. García, Garczarczyk, M., Gaug, M., Godinovic, N., Goebel, F., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Hsu, C. C., Jogler, T., Klepser, S., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Rissi, M., Robert, A., Rügamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Shore, S. N., Sidro, N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Stark, L. S., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Torres, D. F., Turini, N., Vankov, H., Wagner, R. M., Zabalza, V., Zandanel, F., Zanin, R., Zapatero, J., Falcone, A., Vetere, L., Gehrels, N., Trushkin, S., Dhawan, V., and Reig, P.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The discovery of very high energy (VHE) gamma-ray emitting X-ray binaries has triggered an intense effort to better understand the particle acceleration, absorption, and emission mechanisms in compact binary systems, which provide variable conditions along eccentric orbits. Despite this, the nature of some of these systems, and of the accelerated particles producing the VHE emission, is unclear. To answer some of these open questions, we conducted a multiwavelength campaign of the VHE gamma-ray emitting X-ray binary LS I +61 303 including the MAGIC telescope, XMM-Newton, and Swift during 60% of an orbit in 2007 September. We detect a simultaneous outburst at X-ray and VHE bands, with the peak at phase 0.62 and a similar shape at both wavelengths. A linear fit to the simultaneous X-ray/VHE pairs obtained during the outburst yields a correlation coefficient of r=0.97, while a linear fit to all simultaneous pairs provides r=0.81. Since a variable absorption of the VHE emission towards the observer is not expected for the data reported here, the correlation found indicates a simultaneity in the emission processes. Assuming that they are dominated by a single particle population, either hadronic or leptonic, the X-ray/VHE flux ratio favors leptonic models. This fact, together with the detected photon indices, suggests that in LS I +61 303 the X-rays are the result of synchrotron radiation of the same electrons that produce VHE emission as a result of inverse Compton scattering of stellar photons., Comment: To appear in The Astrophysical Journal Letters. 6 pages, 2 figures
Published: 2009
Full Text: View/download PDF

13. MAGIC Gamma-ray Telescope Observation of the Perseus Cluster of Galaxies: implications for cosmic rays, dark matter, and NGC1275

Author: The MAGIC Collaboration, Aleksić, J., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Balestra, S., Barrio, J. A., Bastieri, D., González, J. Becerra, Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Bock, R. K., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britzger, D., Camara, M., Carmona, E., Carosi, A., Colin, P., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. De Cea, Reyes, R. De los, De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. Delgado, Doert, M., Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fonseca, M. V., Font, L., Galante, N., López, R. J. García, Garczarczyk, M., Gaug, M., Godinovic, N., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Hsu, C. C., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Orito, R., Oya, I., Paiano, S., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Rissi, M., Rügamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Torres, D. F., Vankov, H., Wagner, R. M., Zabalza, V., Zandanel, F., Zanin, R., Zapatero, J., Pfrommer, C., Pinzke, A., Enßlin, T. A., Inoue, S., and Ghisellini, G.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The Perseus galaxy cluster was observed by the MAGIC Cherenkov telescope for a total effective time of 24.4 hr during 2008 November and December. The resulting upper limits on the gamma-ray emission above 100 GeV are in the range of 4.6 to 7.5 x 10^{-12} cm^{-2} s^{-1} for spectral indices from -1.5 to -2.5, thereby constraining the emission produced by cosmic rays, dark matter annihilations, and the central radio galaxy NGC1275. Results are compatible with cosmological cluster simulations for the cosmic-ray-induced gamma-ray emission, constraining the average cosmic ray-to-thermal pressure to <4% for the cluster core region (<8% for the entire cluster). Using simplified assumptions adopted in earlier work (a power-law spectrum with an index of -2.1, constant cosmic ray-to-thermal pressure for the peripheral cluster regions while accounting for the adiabatic contraction during the cooling flow formation), we would limit the ratio of cosmic ray-to-thermal energy to E_CR/E_th<3%. The upper limit also translates into a level of gamma-ray emission from possible annihilations of the cluster dark matter (the dominant mass component) that is consistent with boost factors of ~10^4 for the typically expected dark matter annihilation-induced emission. Finally, the upper limits obtained for the gamma-ray emission of the central radio galaxy NGC1275 are consistent with the recent detection by the Fermi-LAT satellite. Due to the extremely large Doppler factors required for the jet, a one-zone synchrotron self-Compton model is implausible in this case. We reproduce the observed spectral energy density by using the structured jet (spine-layer) model which has previously been adopted to explain the high-energy emission of radio galaxies., Comment: 15 pages, 5 figures; accepted for publication in ApJ; updated to match the journal final version
Published: 2009
Full Text: View/download PDF

14. Performance of the MAGIC telescopes in stereoscopic mode

Author: Colin, P., Tridon, D. Borla, Carmona, E., De Sabata, F., Gaug, M., Lombardi, S., Majumdar, P., Moralejo, A., Scalzotto, V., and Sitarek, J.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: The MAGIC gamma-ray observatory has recently been upgraded by a second Cherenkov telescope at a distance of 85 m from the first one. Simultaneous observation of air showers with the two MAGIC telescopes (stereoscopic mode) will improve the reconstruction of the shower axis and solve the ambiguity in the impact point occurring in single-telescope mode. Also, the stereo observation will result in a better angular resolution, energy estimation and cosmic-ray background rejection. It is expected that the sensitivity of MAGIC improves significantly over the full energy range (60 GeV - 20 TeV). Here, we present the performance estimated from Monte Carlo simulations., Comment: 4 pages, 6 figures, proceedings of the 31st ICRC, Lodz 2009
Published: 2009

15. MAGIC Collaboration: Contributions to the 31st International Cosmic Ray Conference (ICRC 2009)

Author: The MAGIC Collaboration, Anderhub, H., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Balestra, S., Barrio, J. A., Bastieri, D., González, J. Becerra, Becker, J. K., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Bock, R. K., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britzger, D., Camara, M., Carmona, E., Carosi, A., Colin, P., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. de Cea, Mendez, C. Delgado, Reyes, R. De los, De Lotto, B., De Maria, M., De Sabata, F., Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fernández, E., Firpo, R., Fonseca, M. V., Font, L., Galante, N., López, R. J. García, Garczarczyk, M., Gaug, M., Godinovic, N., Goebel, F., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Hsu, C. C., Jogler, T., Klepser, S., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Rissi, M., Robert, A., Rügamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Stark, L. S., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Torres, D. F., Turini, N., Vankov, H., Wagner, R. M., Zabalza, V., Zandanel, F., Zanin, R., and Zapatero, J.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Extragalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: Index entry listing the contributed papers of the MAGIC collaboration to the 31th International Cosmic Ray Conference (ICRC 2009), July 7-15 2009, \L\'od\'z, Poland. The individual papers are sorted by subject: Overview and Highlight Papers; MAGIC-II Status and Components; Software and Analysis Techniques; Technical Developments; Scientific Results. This HTML document includes clickable links to the papers that exist on the astro-ph arXiv. We hope that this will make it easy to access the MAGIC contributions in a systematic way., Comment: Index of the MAGIC conference proceedings for ICRC 2009. Added 6 papers missing in v1
Published: 2009

16. A novel background reduction strategy for high level triggers and processing in gamma-ray Cherenkov detectors

Author: Cabras, G., De Angelis, A., De Lotto, B., De Maria, M. M., De Sabata, F., Mansutti, O., Frailis, M., Persic, M., Bigongiari, C., Doro, M., Mariotti, M., Peruzzo, L., Saggion, A., Scalzotto, V., Paoletti, R., Scribano, A., Turini, N., Moralejo, A., Tescaro, D., and Collaboration, the MAGIC
Subjects: Astrophysics
Abstract: Gamma ray astronomy is now at the leading edge for studies related both to fundamental physics and astrophysics. The sensitivity of gamma detectors is limited by the huge amount of background, constituted by hadronic cosmic rays (typically two to three orders of magnitude more than the signal) and by the accidental background in the detectors. By using the information on the temporal evolution of the Cherenkov light, the background can be reduced. We will present here the results obtained within the MAGIC experiment using a new technique for the reduction of the background. Particle showers produced by gamma rays show a different temporal distribution with respect to showers produced by hadrons; the background due to accidental counts shows no dependence on time. Such novel strategy can increase the sensitivity of present instruments., Comment: 4 pages, 3 figures, Proc. of the 9th Int. Syposium "Frontiers of Fundamental and Computational Physics" (FFP9), (AIP, Melville, New York, 2008, in press)
Published: 2008
Full Text: View/download PDF

17. The MAGIC Project: Contributions to ICRC 2007

Author: Albert, J., Aliu, E., Anderhub, H., Antoranz, P., Armada, A., Baixeras, C., Barrio, J. A., Bartko, H., Bastieri, D., Becker, J. K., Bednarek, W., Berger, K., Bigongiari, C., Biland, A., Bock, R. K., Bordas, P., Bosch-Ramon, V., Bretz, T., Britvitch, I., Cabras, G., Camara, M., Carmona, E., Chilingarian, A., Coarasa, J. A., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Curtef, V., Danielyan, V., Dazzi, F., De Angelis, A., Delgado, C., Reyes, R. de los, De Lotto, B., De Maria, M., De Sabata, F., Dorner, D., Doro, M., Errando, M., Fagiolini, M., Ferenc, D., Fernández, E., Firpo, R., Flix, J., Fonseca, M. V., Font, L., Fuchs, M., Galante, N., García-López, R. J., Garczarczyk, M., Gaug, M., Giller, M., Goebel, F., Hakobyan, D., Hayashida, M., Hengstebeck, T., Herrero, A., Höhne, D., Hose, J., Hsu, C. C., Jacon, P., Jogler, T., Kosyra, R., Kranich, D., Kritzer, R., Laille, A., Lindfors, E., Lombardi, S., Longo, F., López, J., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mannheim, K., Mansutti, O., Mariotti, M., Martínez, M., Mazin, D., Merck, C., Meucci, M., Meyer, M., Miranda, J. M., Mirzoyan, R., Mizobuchi, S., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., na-Wilhelmi, E. O, Otte, N., Oya, I., Paneque, D., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R., Persic, M., Peruzzo, L., Piccioli, A., Prandini, E., Puchades, N., Raymers, A., Rhode, W., Ribó, M., Rico, J., Rissi, M., Robert, A., Rügamer, S., Saggion, A., Saito, T. Y., Sánchez, A., Sartori, P., Scalzotto, V., Scapin, V., Schmitt, R., Schweizer, T., Shayduk, M., Shinozaki, K., Shore, S. N., Sidro, N., Sillanpää, A., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L. S., Takalo, L., Temnikov, P., Tescaro, D., Teshima, M., Torres, D. F., Turini, N., Vankov, H., Venturini, A., Vitale, V., Wagner, R. M., Wibig, T., Wittek, W., Zandanel, F., Zanin, R., and Zapatero, J.
Subjects: Astrophysics
Abstract: The MAGIC Project: Contributions to ICRC 2007, Merida, Mexico. Contents pages for the Contribution on behalf of the MAGIC Collaboration to the 30th ICRC that took place in July 2007 in Merida, Mexico. The contents are in html form with clickable links to the papers that exist on the Astrophysics archive. We hope that this will make it easier to access the output of the conference in a systematic way. Comments on how useful this is/ how it could be improved should be sent to michela.demaria@iuav.it., Comment: HTML file with clickable links to papers
Published: 2007

18. Monte Carlo Simulation for the MAGIC-II System

Author: Carmona, E., Majumdar, P., Moralejo, A., Vitale, V., Sobczynska, D., Haffke, M., Bigongiari, C., Otte, N., Cabras, G., De Maria, M., and De Sabata, F.
Subjects: Astrophysics
Abstract: Within the year 2007, MAGIC will be upgraded to a two telescope system at La Palma. Its main goal is to improve the sensitivity in the stereoscopic/coincident operational mode. At the same time it will lower the analysis threshold of the currently running single MAGIC telescope. Results from the Monte Carlo simulations of this system will be discussed. A comparison of the two telescope system with the performance of one single telescope will be shown in terms of sensitivity, angular resolution and energy resolution., Comment: 4 pages, 5 figures, Contribution to the 30th ICRC, Merida, Mexico, July 2007 on behalf of the MAGIC Collaboration
Published: 2007

19. Improving the performance of the single-dish Cherenkov telescope MAGIC through the use of signal timing

Author: Aliu, E., Anderhub, H., Antonelli, L.A., Antoranz, P., Backes, M., Baixeras, C., Barrio, J.A., Bartko, H., Bastieri, D., Becker, J.K., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Bock, R.K., Bonnoli, G., Bordas, P., Borla Tridon, D., Bosch-Ramon, V., Bretz, T., Britvitch, I., Camara, M., Carmona, E., Chilingarian, A., Commichau, S., Contreras, J.L., Cortina, J., Costado, M.T., Covino, S., Curtef, V., Dazzi, F., De Angelis, A., De Cea del Pozo, E., de los Reyes, R., De Lotto, B., De Maria, M., De Sabata, F., Delgado Mendez, C., Dominguez, A., Dorner, D., Doro, M., Elsässer, D., Errando, M., Fagiolini, M., Ferenc, D., Fernández, E., Firpo, R., Fonseca, M.V., Font, L., Galante, N., García López, R.J., Garczarczyk, M., Gaug, M., Goebel, F., Hadasch, D., Hayashida, M., Herrero, A., Höhne, D., Hose, J., Hsu, C.C., Huber, S., Jogler, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Meyer, M., Miranda, J.M., Mirzoyan, R., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Otte, N., Oya, I., Paoletti, R., Paredes, J.M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R.G., Perez-Torres, M.A., Persic, M., Peruzzo, L., Piccioli, A., Prada, F., Prandini, E., Puchades, N., Raymers, A., Rhode, W., Ribó, M., Rico, J., Rissi, M., Robert, A., Rügamer, S., Saggion, A., Saito, T.Y., Salvati, M., Sanchez-Conde, M., Sartori, P., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Shinozaki, K., Shore, S.N., Sidro, N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L.S., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Tluczykont, M., Torres, D.F., Turini, N., Vankov, H., Venturini, A., Vitale, V., Wagner, R.M., Wittek, W., Zabalza, V., Zandanel, F., Zanin, R., and Zapatero, J.
Published: 2009
Full Text: View/download PDF

20. Radio Imaging of the Very-High-Energy γ-Ray Emission Region in the Central Engine of a Radio Galaxy

Author: Acciari, V. A., Aliu, E., Arlen, T., Bautista, M., Beilicke, M., Benbow, W., Bradbury, S. M., Buckley, J. H., Bugaev, V., Butt, Y., Byrum, K., Cannon, A., Celik, O., Cesarini, A., Chow, Y. C., Ciupik, L., Cogan, P., Cui, W., Dickherber, R., Fegan, S. J., Finley, J. P., Fortin, P., Fortson, L, Furniss, A., Gall, D., Gillanders, G. H., Grube, J., Guenette, R., Gyuk, G., Hanna, D., Holder, J., Horan, D., Hui, C. M., Humensky, T. B., Imran, A., Kaaret, P., Karlsson, N., Kieda, D., Kildea, J., Konopelko, A., Krawczynski, H., Krennrich, F., Lang, M. J., LeBohec, S., Maier, G., McCann, A., McCutcheon, M., Millis, J., Moriarty, P., Ong, R. A., Otte, A. N., Pandel, D., Perkins, J. S., Petry, D., Pohl, M., Quinn, J., Ragan, K., Reyes, L C., Reynolds, P. T., Roache, E., Rose, H. J., Schroedter, M., Sembroski, G. H., Smith, A W., Swordy, S. P., Theiling, M., Toner, J. A, Vartotta, A., Vincent, S., Wakely, S. P., Ward, J. E., Weekes, T. C., Weinstein, A., Williams, D. A., Wissel, S., Wood, M., Walker, R. C., Davies, F., Hardee, P. E., Junor, W., Ly, C., Aharonian, F., Akhperjanian, A. G., Anton, G., de Almeida, U. Barres, Bazer-Bachi, A. R., Becherini, Y., Behera, B., Bernlöhr, K., Bochow, A., Boisson, C., Bolmont, J., Borrel, V., Brucker, J., Brun, F., Brun, P., Bühler, R., Bulik, T., Büsching, I., Boutelier, T., Chadwick, P. M., Charbonnier, A., Chaves, R. C. G., Cheesebrough, A., Chounet, L-M., Clapson, A. C., Coignet, G., Dalton, M., Daniel, M. K., Davids, I. D., Degrange, B., Deil, C., Dickinson, H. J., Djannati-Ataï, A., Domainko, W., OʼC. Drury, L, Dubois, F., Dubus, G., Dyks, J., Dyrda, M., Egberts, K., Emmanoulopoulos, D., Espigat, P., Farnier, C., Feinstein, F., Fiasson, A., Förster, A, Fontaine, G., Füling, M., Gabici, S., Gallant, Y. A., Gérard, L, Gerbig, D., Giebels, B., Glicenstein, J. F., Glück, B., Goret, P., Göhring, D., Hauser, D., Hauser, M., Heinz, S., Heinzelmann, G., Henri, G., Hermann, G., Hinton, J. A, Hoffmann, A., Hofmann, W., Holleran, M., Hoppe, S., Horns, D., Jacholkowska, A., de Jager, O. C., Jahn, C., Jung, I., Katarzynski, K., Katz, U., Kaufmann, S., Kendziorra, E., Kerschhaggl, M., Khangulyan, D., Khélifi, B., Keogh, D., Kluzniak, W., Kneiske, T., Komin, Nu., Kosack, K., Lamanna, G., Lenain, J.-P., Lohse, T., Marandon, V., Martin, J. M., Martineau-Huynh, O., Marcowith, A., Maurin, D., L McComb, T. J., Medina, M. C., Moderski, R., Moulin, E., Naumann-Godo, M., de Naurois, M., Nedbal, D., Nekrassov, D., Nicholas, B., Niemiec, J., Nolan, S. J., Ohm, S., Olive, J.-F., de Oña Wilhelmi, E., Orford, K. J., Ostrowski, M., Panter, M., Arribas, M. Paz, Pedaletti, G., Pelletier, G., Petrucci, P.-O., Pita, S., Pühlhofer, G., Punch, M., Quirrenbach, A., Raubenheimer, B. C., Raue, M., Rayner, S. M., Renaud, M., Rieger, F., Ripken, J., Rob, L, Rosier-Lees, S., Rowell, G., Rudak, B., Rulten, C. B., Ruppel, J., Sahakian, V., Santangelo, A., Schlickeiser, R., Schöck, F. M., Schröder, R., Schwanke, U., Schwarzburg, S., Schwemmer, S., Shalchi, A, Sikora, M., Skilton, J. L, Sol, H., Spangler, D., Stawarz, L., Steenkamp, R., Stegmann, C., Stinzing, F., Superina, G., Szostek, A, Tam, P. H., Tavemet, J.-P., Terrier, R., Tibolla, O., Tluczykont, M., van Eldik, C., Vasileiadis, G., Venter, C., Venter, L, Vialle, J. P., Vincent, P., Vivier, M., Völk, H. J., Volpe, F., Wagner, S. J., Ward, M., Zdziarski, A. A., Zech, A., Anderhub, H., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Balestra, S., Barrio, J. A., Bastieri, D., González, J. Becerra, Becker, J. K., Bednarek, W., Berger, K., Bernardini, E., Biland, A, Bock, R. K., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britvitch, I., Camara, M., Carmona, E., Commichau, S., Contreras, J. L, Cortina, J., Costado, M. T., Covino, S., Curtef, V., Dazzi, F., De Angelis, A., De Cea del Pozo, E., Mendez, C. Delgado, De los Reyes, R., De Lotto, B., De Maria, M., De Sabata, F., Dominguez, A., Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fernández, E., Firpo, R., Fonseca, M. V., Font, L., Galante, N., Garcia López, R. J., Garczarczyk, M., Gaug, M., Goebel, F., Hadasch, D., Hayashida, M., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hsu, C. C., Jogler, T., Kranich, D., Barbera, A. La, Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M, Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L, Mariotti, M., Martinez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Oya, I., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L, Prada, F., Prandini, E., Puchades, N., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Rissi, M., Robert, A., Rügamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Shore, S. N., Sidro, N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L S., Takalo, L, Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Torres, D. F., Turini, N., Vankov, H., Wagner, R. M., Zabalza, V., Zandanel, F., Zanin, R., and Zapatero, J.
Published: 2009

21. Observation of Pulsed γ-Rays Above 25 GeV from the Crab Pulsar with MAGIC

Author: Aliu, E., Anderhub, H., Antonelli, L A., Antoranz, P., Backes, M., Baixeras, C., Barrio, J. A., Bartko, H., Bastieri, D., Becker, J. K., Bednarek, W., Berger, K., Bernardini, E., Bigongiari, C., Biland, A., Bock, R. K., Bonnoli, G., Bordas, P., Bosch-Ramon, V., Bretz, T., Britvitch, I., Camara, M., Carmona, E., Chilingarian, A., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Curtef, V., Dazzi, F., De Angelis, A., del Pozo, E. De Cea, Reyes, R. de los, De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. Delgado, Dominguez, A., Dorner, D., Doro, M., Elsässer, D., Errando, M., Fagiolini, M., Ferenc, D., Fernandez, E., Firpo, R., Fonseca, M. V., Font, L, Galante, N., Garcia Lopez, R. J., Garczarczyk, M., Gaug, M., Goebel, F., Hadasch, D., Hayashida, M., Herrero, A., Höhne, D., Hose, J., Hsu, C. C., Huber, S., Jogler, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Meucci, M., Meyer, M., Miranda, J. M., Mirzoyan, R., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Otte, N., Oya, I., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Piccioli, A., Prada, F., Prandini, E., Puchades, N., Raymers, A., Rhode, W., Ribó, M., Rico, J., Rissi, M., Robert, J A., Rügamer, S., Saggion, A., Saito, T. Y., Salvati, M., SanchezConde, M., Sartori, P., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Shinozaki, K., Shore, S. N., Sidro, N., Sierpowska-Bartosik, A., Sillanpää, A., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L. S., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Tluczykont, M., Torres, D. F., Turini, N., Vankov, H., Venturini, A., Vitale, V., Wagner, R. M., Wittek, W., Zabalza, V., Zandanel, F., Zanin, R., Zapatero, J., de jager, O. C., and Wilheimi, E. de Ona
Published: 2008
Full Text: View/download PDF

22. Very-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?

Author: Albert, J., Aliu, E., Anderhub, H., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Barrio, J. A., Bartko, H., Bastieri, D., Becker, J. K., Bednarek, W., Berger, K., Bernardini, E., Bigongiari, C., Biland, A., Bock, R. K., Bonnoli, G., Bordas, P., Bosch-Ramon, V., Bretz, T., Britvitch, I., Camara, M., Carmona, E., Chilingarian, A., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Curtef, V., Dazzi, F., De Angelis, A., De Cea del Pozo, E., de los Reyes, R., De totto, B., De Maria, M., De Sabata, F., Delgado Mendez, C., Dominguez, A., Dorner, D., Doro, M., Errando, M., Fagiolini, M., Ferenc, D., Fernández, E., Firpo, R., Fonseca, M. V., Font, L., Galante, N., García López, R. J., Garczarczyk, M., Gaug, M., Goebel, F., Hayashida, M., Herrero, A., Höhne, D., Hose, J., Hsu, C. C., Huber, S., Jogler, T., Kneiske, T. M., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Meyer, M., Miranda, J. M., Mirzoyan, R., Mizobuchi, S., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Otte, N., Oya, I., Panniello, M., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Piccioli, A., Prada, F., Prandini, E., Puchades, N., Raymers, A., Rhode, W., Ribó, M., Rico, J., Rissi, M., Robert, A., Rügamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sanchez-Conde, M., Sartori, P., Satalecka, K., Scalzotto, V., Scapin, V., Schmitt, R., Schweizer, T., Shayduk, M., Shinozaki, K., Shore, S. N., Sidro, N., Sierpowska-Bartosik, A., Sillanpää, A., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L. S., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Ttuczykont, M., Torres, D. F., Turini, N., Vankov, H., Vitale, A. Venturing V., Wagner, R. M., Wittek, W., Zabalza, V., Zandanel, F., Zanin, R., and Zapatero, J.
Published: 2008
Full Text: View/download PDF

23. Imaging and Studying Standing Waves with a Homemade Melde-type Apparatus and Information and Communication Technology

Author: Bozzo, G., de Sabata, F., Pistori, S., and Monti, F.
Subjects: Melde-type apparatus, ICT, Wave Physics, Wave Physics, Melde-type apparatus, ICT
Published: 2019

24. Correlated X-ray and Very High Energy emission in the gamma-ray binary LS I +61 303

Author: The MAGIC Collaboration, González, J. Becerra, Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Becker, J. K., Puljak, I., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Rissi, M., Robert, A., Rügamer, S., Saggion, A., Saito, T. Y., Bednarek, W., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Shore, S. N., Sidro, N., Sierpowska-Bartosik, A., Berger, K., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Stark, L. S., Suric, T., Takalo, L., Tavecchio, F., Bernardini, E., Temnikov, P., Tescaro, D., Teshima, M., Torres, D. F., Turini, N., Vankov, H., Wagner, R. M., Zabalza, V., Zandanel, F., Zanin, R., Biland, A., Zapatero, J., Falcone, A., Vetere, L., Gehrels, N., Trushkin, S., Dhawan, V., Reig, P., Bigas, O. Blanch, Bock, R. K., Bonnoli, G., Bordas, P., Anderhub, H., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britzger, D., Camara, M., Carmona, E., Carosi, A., Colin, P., Antonelli, L. A., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Dazzi, F., De Angelis, A., del Pozo, E. de Cea, Reyes, R. De los, De Lotto, B., Antoranz, P., De Maria, M., De Sabata, F., Mendez, C. Delgado, Domínguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Backes, M., Fernández, E., Firpo, R., Fonseca, M. V., Font, L., Galante, N., López, R. J. García, Garczarczyk, M., Gaug, M., Godinovic, N., Goebel, F., Baixeras, C., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Hsu, C. C., Jogler, T., Klepser, S., Kranich, D., Balestra, S., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Barrio, J. A., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Bastieri, D., Moldón, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., H., Anderhub, L. A., Antonelli, P., Antoranz, M., Backe, C., Baixera, S., Balestra, J. A., Barrio, D., Bastieri, J. B., Gonzalez, J. K., Becker, W., Bednarek, K., Berger, E., Bernardini, A., Biland, O. B., Biga, R. K., Bock, G., Bonnoli, P., Borda, D. B., Tridon, V., Bosch Ramon, D., Bose, I., Braun, T., Bretz, D., Britzger, M., Camara, E., Carmona, A., Carosi, P., Colin, S., Commichau, J. L., Contrera, J., Cortina, M. T., Costado, S., Covino, F., Dazzi, A. D., Angeli, E. D. C., del Pozo, R. D., los Reye, B. D., Lotto, M. D., Maria, F. D., Sabata, C. D., Mendez, A., Dominguez, D. D., Prester, D., Dorner, M., Doro, D., Elsaesser, M., Errando, D., Ferenc, E., Fernandez, R., Firpo, M. V., Fonseca, L., Font, N., Galante, R. J. G., Lopez, M., Garczarczyk, M., Gaug, N., Godinovic, F., Goebel, D., Hadasch, A., Herrero, D., Hildebrand, D., Hohne Monch, J., Hose, D., Hrupec, C. C., Hsu, T., Jogler, S., Klepser, D., Kranich, A. L., Barbera, A., Laille, E., Leonardo, E., Lindfor, S., Lombardi, Longo, Francesco, M., Lopez, E., Lorenz, P., Majumdar, G., Maneva, N., Mankuzhiyil, K., Mannheim, L., Maraschi, M., Mariotti, M., Martinez, D., Mazin, M., Meucci, J. M., Miranda, R., Mirzoyan, H., Miyamoto, J., Moldon, M., Mole, A., Moralejo, D., Nieto, K., Nilsson, J., Ninkovic, R., Orito, I., Oya, R., Paoletti, J. M., Parede, M., Pasanen, D., Pascoli, F., Pau, R. G., Pegna, M. A., Perez Torre, M., Persic, L., Peruzzo, F., Prada, E., Prandini, N., Puchade, I., Puljak, I., Reichardt, W., Rhode, M., Ribo, J., Rico, M., Rissi, A., Robert, S., Rugamer, A., Saggion, T. Y., Saito, M., Salvati, M., Sanchez Conde, K., Satalecka, V., Scalzotto, V., Scapin, T., Schweizer, M., Shayduk, S. N., Shore, N., Sidro, A., Sierpowska Bartosik, A., Sillanpaa, J., Sitarek, D., Sobczynska, F., Spanier, S., Spiro, A., Stamerra, L. S., Stark, T., Suric, L., Takalo, F., Tavecchio, P., Temnikov, D., Tescaro, M., Teshima, D. F., Torre, N., Turini, H., Vankov, R. M., Wagner, V., Zabalza, F., Zandanel, R., Zanin, J., Zapatero, A., Falcone, L., Vetere, N., Gehrel, S., Trushkin, V., Dhawan, and P., Reig
Subjects: Very High Energy Gamma-ray Astronomy, MAGIC telescope, Gamma-ray Binaries, Photon, binaries: general, gamma rays: observations, stars: emission-line Be, stars: individ- ual (LS I +61 303), X-rays: binaries, X-rays: individual (LS I +61 303), Astrophysics::High Energy Astrophysical Phenomena, Population, FOS: Physical sciences, stars: emission-line, Synchrotron radiation, Astrophysics::Cosmology and Extragalactic Astrophysics, Electron, Astrophysics, 01 natural sciences, Raigs gamma, X-rays, 0103 physical sciences, education, Absorption (electromagnetic radiation), 010303 astronomy & astrophysics, Estels binaris de raigs X, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, astro-ph.HE, education.field_of_study, 010308 nuclear & particles physics, Gamma rays, Compton scattering, Gamma ray, Astronomy and Astrophysics, Particle acceleration, X-ray binaries, stars: individual: LS I +61 303, X-Rays: Binaries, 13. Climate action, Space and Planetary Science, ddc:520, Electrónica, Física nuclear, Raigs X, Gamma Rays: Observations, Electricidad, Astrophysics - High Energy Astrophysical Phenomena
Abstract: The discovery of very high energy (VHE) gamma-ray emitting X-ray binaries has triggered an intense effort to better understand the particle acceleration, absorption, and emission mechanisms in compact binary systems, which provide variable conditions along eccentric orbits. Despite this, the nature of some of these systems, and of the accelerated particles producing the VHE emission, is unclear. To answer some of these open questions, we conducted a multiwavelength campaign of the VHE gamma-ray emitting X-ray binary LS I +61 303 including the MAGIC telescope, XMM-Newton, and Swift during 60% of an orbit in 2007 September. We detect a simultaneous outburst at X-ray and VHE bands, with the peak at phase 0.62 and a similar shape at both wavelengths. A linear fit to the simultaneous X-ray/VHE pairs obtained during the outburst yields a correlation coefficient of r=0.97, while a linear fit to all simultaneous pairs provides r=0.81. Since a variable absorption of the VHE emission towards the observer is not expected for the data reported here, the correlation found indicates a simultaneity in the emission processes. Assuming that they are dominated by a single particle population, either hadronic or leptonic, the X-ray/VHE flux ratio favors leptonic models. This fact, together with the detected photon indices, suggests that in LS I +61 303 the X-rays are the result of synchrotron radiation of the same electrons that produce VHE emission as a result of inverse Compton scattering of stellar photons., To appear in The Astrophysical Journal Letters. 6 pages, 2 figures
Published: 2015

25. Spectral Energy Distribution of Markarian 501: Quiescent State Versus Extreme Outburst

Author: Acciari, V.-A., Aleksic, J., Antonelli, L. A., Antoranz, P., Arlen, T., Aune, T., Backes, M., Barrio, J. A., Bastieri, D., Becerra González, J., Bednarek, W., Schultz, C., Schweizer, T., Sembroski, G. H., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Boller, A., Konopelko, A., Spanier, F., Spiro, S., Stamerra, A., Steele, D., Steinke, B., Storz, J., Strah, N., Struebig, J. C., Suric, T., Swordy, S. P., Krähenbühl, T., Boltuch, D., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Theiling, M., the MAGIC Collaboration, the VERITAS Collaboration, Kranich, D., Thibadeau, S., Bonnoli, G., Torres, D. F., Vankov, H., Varlotta, A., Vassiliev, V. V., Vincent, S., Wagner, R. M., Wakely, S. P., Ward, J. E., Krause, J., Weekes, T. C., Weinstein, A., Bordas, P., Weisgarber, T., Weitzel, Q., Williams, D. A., Wood, M., Zabalza, V., Zandanel, F., Zanin, R., Krawczynski, H., Zitzer, B., Borla Tridon, D., Bosch-Ramon, V., Bose, D., Böttcher, M., Bradbury, S.-M., Braun, I., Bretz, T., Buckley, J.-H., Bugaev, V., Krennrich, F., Camara, M., Cannon, A., Carmona, E., Carosi, A., Cesarini, A., Ciupik, L., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., La Barbera, A., Covino, S., Cui, W., Dazzi, F., De Angelis, A., De Cea del Pozo, E., Delgado Mendez, C., De Lotto, B., De Maria, M., De Sabata, F., Diago Ortega, A., Leonardo, E., Dickherber, R., Doert, M., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Duke, C., Elsaesser, D., Errando, M., Lindfors, E., Falcone, A., Ferenc, D., Finley, J . P., Finnegan, G., Fonseca, M. V., Font, L., Fortson, L., Furniss, A., Galante, N., Gall, D., Lombardi, S., García López, R. J., Garczarczyk, M., Gaug, M., Giavitto, G., Godambe, S., Godinovic, N., Grube, J., Guenette, R., Gyuk, G., Hadasch, D., Beilicke, M., Hanna, D., Hayashida, M., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Holder, J., Hose, J., Hrupec, D., Huang, D., Hui, C. M., Longo, F., Humensky, T. B., Imran, A., Jogler, T., Kaaret, P., Karlsson, N., Kertzman, M., Kieda, D., Klepser, S., López, M., Lorenz, E., Madhavan, A. S., Maier, G., Majumdar, P., Makariev, M., Maneva, G., Mankuzhiyil, N., Mannheim, K., Benbow, W., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., McArthur, S., McCann, A., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Berdyugin, A., Moldón, J., Moralejo, A., Moriarty, P., Nieto, D., Nilsson, K., Ong, R. A., Orito, R., Otte, A. N., Oya, I., Pandel, D., Berger, K., Paneque, D., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Perkins, J. S., Persic, M., Bernardini, E., Peruzzo, L., Pichel, A., Pochon, J., Pohl, M., Prada, F., Prada Moroni, P. G., Prandini, E., Puchades, N., Puljak, I., Quinn, J., Biland, A., Ragan, K., Reichardt, I., Reinthal, R., Reyes, L. C., Reynolds, P. T., Rhode, W., Ribó, M., Rico, J., Rissi, M., Roache, E., Blanch, O., Rose, H. J., Rügamer, S., Saggion, A., Saito, K., Saito, T. Y., Salvati, M., Sánchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Bock, R. K., Schroedter, M., Universitat de Barcelona, Acciari, V. A., Arlen, T., Aune, T., Beilicke, M., Benbow, W., Böttcher, M., Boltuch, D., Bradbury, S. M., Buckley, J. H., Bugaev, V., Cannon, A., Cesarini, A., Ciupik, L., Cui, W., Dickherber, R., Duke, C., Errando, M., Falcone, A., Finley, J. P., Finnegan, G., Fortson, L., Furniss, A., Galante, N., Gall, D., Godambe, S., Grube, J., Guenette, R., Gyuk, G., Hanna, D., Holder, J., Huang, D., Hui, C. M., Humensky, T. B., Imran, A., Kaaret, P., Karlsson, N., Kertzman, M., Kieda, D., Konopelko, A., Krawczynski, H., Krennrich, F., Madhavan, A. S., Maier, G., Mcarthur, S., Mccann, A., Moriarty, P., Ong, R. A., Otte, A. N., Pandel, D., Perkins, J. S., Pichel, A., Pohl, M., Quinn, J., Ragan, K., Reyes, L. C., Reynolds, P. T., Roache, E., Rose, H. J., Schroedter, M., Sembroski, G. H., Steele, D., Swordy, S. P., Theiling, M., Thibadeau, S., Varlotta, A., Vassiliev, V. V., Vincent, S., Wakely, S. P., Ward, J. E., Weekes, T. C., Weinstein, A., Weisgarber, T., Williams, D. A., Wood, M., Zitzer, B., Aleksić, J., Antonelli, L. A., Antoranz, P., Backes, M., Barrio, J. A., Bastieri, D., Becerra González, J., Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Bordas, P., Borla Tridon, D., Bosch Ramon, V., Bose, D., Braun, I., Bretz, T., Camara, M., Carmona, E., Carosi, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Dazzi, F., De Angelis, A., De Cea del Pozo, E., De Lotto, B., De Maria, M., De Sabata, F., Delgado Mendez, C., Diago Ortega, A., Doert, M., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Elsaesser, D., Ferenc, D., Fonseca, M. V., Font, L., García López, R. J., Garczarczyk, M., Gaug, M., Giavitto, G., Godinović, N., Hadasch, D., Herrero, A., Hildebrand, D., Höhne Mönch, D., Hose, J., Hrupec, D., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., Krause, J., La Barbera, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, Francesco, López, M., Lorenz, E., Majumdar, P., Makariev, M., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moralejo, A., Nieto, D., Nilsson, K., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pauss, F., Pegna, R. G., Perez Torres, M. A., Persic, M., Peruzzo, L., Pochon, J., Prada, F., Prada Moroni, P. G., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Reinthal, R., Rhode, W., Ribó, M., Rico, J., Rissi, M., Rügamer, S., Saggion, A., Saito, K., Saito, T. Y., Salvati, M., Sánchez Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Storz, J., Strah, N., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Torres, D. F., Vankov, H., Wagner, R. M., Weitzel, Q., Zabalza, V., Zandanel, F., Zanin, R., Paneque, D., and Hayashida, M.
Subjects: Astrophysics, 01 natural sciences, 7. Clean energy, LARGE-AREA TELESCOPE, law.invention, Raigs gamma, Spitzer Space Telescope, law, GAMMA-RAY EMISSION, ACTIVE GALACTIC NUCLEI, MULTIWAVELENGTH OBSERVATIONS, X-RAY, RADIATION, BLAZAR, PERFORMANCE, EVOLUTION, ASTRONOMY, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, non-thermal [radiation mechanisms], Synchrotron, galaxies [X-rays], BL Lacertae objects: individual (Markarian 501 = VER J1653+397) — galaxies: active — gamma rays: observations — radiation mechanisms: non-thermal — X-rays: galaxies, bl lacertae objects: individual (markarian 501=ver j1653+397), active [galaxies], Spectral energy distribution, Electrónica, Física nuclear, Raigs X, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, Active galactic nucleus, gamma ray astronomy, IMAGING CHERENKOV DETECTOR, Astrophysics::High Energy Astrophysical Phenomena, galaxies: active, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Photon energy, gamma rays: galaxies, 0103 physical sciences, X-rays, galaxie [gamma rays], Blazar, Astrophysics::Galaxy Astrophysics, 010308 nuclear & particles physics, Gamma rays, Astronomy and Astrophysics, radiation mechanisms: non-thermal, BL Lacertae objects: individual: Markarian 501 {\amp}equals VER J1653+397, X-rays: galaxies, Space and Planetary Science, individual: Markarian 501 {\amp}equals VER J1653+397 [BL Lacertae objects], Galàxies actives, Active galaxies, ddc:520, Order of magnitude, Fermi Gamma-ray Space Telescope
Abstract: The very high energy (VHE; E > 100 GeV) blazar Markarian 501 has a well-studied history of extreme spectral variability and is an excellent laboratory for studying the physical processes within the jets of active galactic nuclei. However, there are few detailed multiwavelength studies of Markarian 501 during its quiescent state, due to its low luminosity. A short-term multiwavelength study of Markarian 501 was coordinated in March 2009, focusing around a multi-day observation with the Suzaku X-ray satellite and including {\gamma}-ray data from VERITAS, MAGIC, and the Fermi Gamma-ray Space Telescope with the goal of providing a well-sampled multiwavelength baseline measurement of Markarian 501 in the quiescent state. The results of these quiescent-state observations are compared to the historically extreme outburst of April 16, 1997, with the goal of examining variability of the spectral energy distribution between the two states. The derived broadband spectral energy distribution shows the characteristic double-peaked profile. We find that the X-ray peak shifts by over two orders of magnitude in photon energy between the two flux states while the VHE peak varies little. The limited shift in the VHE peak can be explained by the transition to the Klein-Nishina regime. Synchrotron self-Compton models are matched to the data and the implied Klein-Nishina effects are explored., Comment: Accepted for publication in ApJ, 25 pages, 6 figures, corresponding authors: Daniel Gall daniel-d-gall@uiowa.edu and Wei Cui cui@purdue.edu
Published: 2011

26. Magic Constraints on γ-ray Emission from Cygnus X-3

Author: Aleksic, J, Antonelli, La, Antoranz, P, Backes, M, Baixeras, C, Barrio, Ja, Bastieri, Denis, Gonzalez, Jb, Bednarek, W, Berdyugin, A, Berger, K, Bernardini, E, Biland, A, Blanch, O, Bock, Rk, Boller, A, Bonnoli, G, Bordas, P, Tridon, Db, BOSCH RAMON, V, Bose, D, Braun, I, Bretz, T, Britzger, D, Camara, M, Carmona, E, Carosi, A, Colin, P, Contreras, Jl, Cortina, J, Costado, Mt, Covino, S, Dazzi, F, DE ANGELIS, A, DEL POZO EDC, DE LOTTO, B, DE MARIA, M, DE SABATA, F, Mendez, Cd, Doert, M, Dominguez, A, Prester, Dd, Dorner, D, Doro, Michele, Elsaesser, D, Errando, M, Ferenc, D, Fonseca, Mv, Font, L, Lopez, Rjg, Garczarczyk, M, Gaug, M, Godinovic, N, Goebel, F, Hadasch, D, Herrero, A, Hildebrand, D, HOHNE MONCH, D, Hose, J, Hrupec, D, Hsu, Cc, Jogler, T, Klepser, S, Krahenbuhl, T, Kranich, D, LA BARBERA, A, Laille, A, Leonardo, E, Lindfors, E, Lombardi, S, Longo, F, Lopez, M, Lorenz, E, Majumdar, P, Maneva, G, Mankuzhiyil, N, Mannheim, K, Maraschi, L, Mariotti, Mose', Martinez, M, Mazin, D, Meucci, M, Miranda, Jm, Mirzoyan, R, Miyamoto, H, Moldon, J, Moles, M, Moralejo, A, Nieto, D, Nilsson, K, Ninkovic, J, Orito, R, Oya, I, Paiano, S, Paoletti, R, Paredes, Jm, Partini, S, Pasanen, M, Pascoli, Donatella, Pauss, F, Pegna, Rg, PEREZ TORRES MA, Persic, M, Peruzzo, L, Prada, F, Prandini, Elisa, Puchades, N, Puljak, I, Reichardt, I, Rhode, W, Ribo, M, Rico, J, Rissi, M, Rugamer, S, Saggion, Antonio, Saito, K, Saito, Ty, Salvati, M, SANCHEZ CONDE, M, Satalecka, K, Scalzotto, VILLI MARIO, Scapin, V, Schultz, C, Schweizer, T, Shayduk, M, Shore, Sn, SIERPOWSKA BARTOSIK, A, Sillanpaa, A, Sitarek, J, Sobczynska, D, Spanier, F, Spiro, S, Stamerra, A, Steinke, B, Struebig, Jc, Suric, T, Takalo, L, Tavecchio, F, Temnikov, P, Terzic, T, Tescaro, D, Teshima, M, Torres, Df, Vankov, H, Wagner, Rm, Weitzel, Q, Zabalza, V, Zandanel, F, Zanin, R, Bulgarelli, A, MAX MOERBECK, W, Piano, G, Pooley, G, Readhead, Acs, Richards, Jl, Sabatini, S, Striani, E, Tavani, M, Trushkin, S., J., Aleksic, L. A., Antonelli, P., Antoranz, M., Backe, C., Baixera, J. A., Barrio, D., Bastieri, J. B., Gonzalez, W., Bednarek, A., Berdyugin, K., Berger, E., Bernardini, A., Biland, O., Blanch, R. K., Bock, A., Boller, G., Bonnoli, P., Borda, D. B., Tridon, V., Bosch Ramon, D., Bose, I., Braun, T., Bretz, D., Britzger, M., Camara, E., Carmona, A., Carosi, P., Colin, J. L., Contrera, J., Cortina, M. T., Costado, S., Covino, F., Dazzi, A. D., Angeli, E. D. C., Del Pozo, B. D., Lotto, M. D., Maria, F. D., Sabata, C. D., Mendez, M., Doert, A., Dominguez, D. D., Prester, D., Dorner, M., Doro, D., Elsaesser, M., Errando, D., Ferenc, M. V., Fonseca, L., Font, R. J. G., Lopez, M., Garczarczyk, M., Gaug, N., Godinovic, F., Goebel, D., Hadasch, A., Herrero, D., Hildebrand, D., Hohne Monch, J., Hose, D., Hrupec, C. C., Hsu, T., Jogler, S., Klepser, T., Krahenbuhl, D., Kranich, A. L., Barbera, A., Laille, E., Leonardo, E., Lindfor, S., Lombardi, Longo, Francesco, M., Lopez, E., Lorenz, P., Majumdar, G., Maneva, N., Mankuzhiyil, K., Mannheim, L., Maraschi, M., Mariotti, M., Martinez, D., Mazin, M., Meucci, J. M., Miranda, R., Mirzoyan, H., Miyamoto, J., Moldon, M., Mole, A., Moralejo, D., Nieto, K., Nilsson, J., Ninkovic, R., Orito, I., Oya, S., Paiano, R., Paoletti, J. M., Parede, S., Partini, M., Pasanen, D., Pascoli, F., Pau, R. G., Pegna, M. A., Perez Torre, M., Persic, L., Peruzzo, F., Prada, E., Prandini, N., Puchade, I., Puljak, I., Reichardt, W., Rhode, M., Ribo, J., Rico, M., Rissi, S., Rugamer, A., Saggion, K., Saito, T. Y., Saito, M., Salvati, M., Sanchez Conde, K., Satalecka, V., Scalzotto, V., Scapin, C., Schultz, T., Schweizer, M., Shayduk, S. N., Shore, A., Sierpowska Bartosik, A., Sillanpaa, J., Sitarek, D., Sobczynska, F., Spanier, S., Spiro, A., Stamerra, B., Steinke, J. C., Struebig, T., Suric, L., Takalo, F., Tavecchio, P., Temnikov, T., Terzic, D., Tescaro, M., Teshima, D. F., Torre, H., Vankov, R. M., Wagner, Q., Weitzel, V., Zabalza, F., Zandanel, R., Zanin, A., Bulgarelli, W., Max Moerbeck, G., Piano, G., Pooley, A. C. S., Readhead, J. L., Richard, S., Sabatini, E., Striani, M., Tavani, and S., Trushkin
Subjects: Photon, HIGH-ENERGY EMISSION, MICROQUASAR GRS 1915+105, X-RAY, RELATIVISTIC JET, CYG X-3, RADIO OUTBURST, CRAB-NEBULA, BINARY, TELESCOPE, PULSAR, Astrophysics, 01 natural sciences, law.invention, Raigs gamma, law, Observacions astronòmiques, 010303 astronomy & astrophysics, Estels binaris de raigs X, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Very High Energy Gamma-ray Astronomy, MAGIC telescope, Black Holes, Gamma ray, X-ray binaries, Electrónica, Física nuclear, Radio frequency, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, Astronomical observations, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Compact star, Radiation, gamma ray astronomy, Cosmic rays, IMAGING CHERENKOV DETECTOR, Telescope, 0103 physical sciences, acceleration of particles, binaries: general, gamma rays: observations, X-rays: bina- ries — X-rays: individual (Cygnus X-3), Cherenkov radiation, Astrophysics::Galaxy Astrophysics, 010308 nuclear & particles physics, Gamma rays, Magic (programming), Astronomy, Astronomy and Astrophysics, Space and Planetary Science
Abstract: Cygnus X-3 is a microquasar consisting of an accreting compact object orbiting around a Wolf-Rayet star. It has been detected at radio frequencies and up to high-energy gamma rays (above 100 MeV). However, many models also predict a very high energy (VHE) emission (above hundreds of GeV) when the source displays relativistic persistent jets or transient ejections. Therefore, detecting such emission would improve the understanding of the jet physics. The imaging atmospheric Cherenkov telescope MAGIC observed Cygnus X-3 for about 70 hours between 2006 March and 2009 August in different X-ray/radio spectral states and also during a period of enhanced gamma-ray emission. MAGIC found no evidence for a VHE signal from the direction of the microquasar. An upper limit to the integral flux for energies higher than 250 GeV has been set to 2.2 x 10-12 photons cm-2 s-1 (95% confidence level). This is the best limit so far to the VHE emission from this source. The non-detection of a VHE signal during the period of activity in the high-energy band sheds light on the location of the possible VHE radiation favoring the emission from the innermost region of the jets, where absorption is significant. The current and future generations of Cherenkov telescopes may detect a signal under precise spectral conditions., 14 pages, 11 figures, This manuscript has been accepted by ApJ (2010)
Published: 2010

27. Simultaneous Multiwavelength observation of Mkn 501 in a low state in 2006

Author: Anderhub, H., Antonelli, L. A., Bednarek, W., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Rissi, M., Robert, A., Berger, K., Rügamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Bernardini, E., Shore, S. N., Sidro, N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L. S., Takalo, L., Biland, A., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Tluczykont, M., Torres, D. F., Turini, N., Vankov, H., Wagner, R. M., Wittek, W., Bock, R. K., Zabalza, V., Zandanel, F., Zanin, R., Zapatero, J., Sato, R., Ushio, M., Kataoka, J., Madejski, G., Takahashi, T., MAGIC Collaboration, Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Antoranz, P., Braun, I., Bretz, T., Britvitch, I., Camara, M., Carmona, E., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Backes, M., Curtef, V., Dazzi, F., De Angelis, A., Pozo, E. De Cea del, Reyes, R. de los, De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. Delgado, Dominguez, A., Baixeras, C., Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fernández, E., Firpo, R., Fonseca, M. V., Font, L., Galante, N., Balestra, S., López, R. J. García, Garczarczyk, M., Gaug, M., Goebel, F., Hadasch, D., Hayashida, M., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Barrio, J. A., Hsu, C. C., Jogler, T., Kranich, D., Barbera, A. La, Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Bastieri, D., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., González, J. Becerra, Meyer, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldón, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Becker, J. K., Otte, N., Oya, I., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., H., Anderhub, L. A., Antonelli, P., Antoranz, M., Backe, C., Baixera, S., Balestra, J. A., Barrio, D., Bastieri, J. B., Gonzalez, J. K., Becker, W., Bednarek, K., Berger, E., Bernardini, A., Biland, R. K., Bock, G., Bonnoli, P., Borda, D. B., Tridon, V., Bosch Ramon, D., Bose, I., Braun, T., Bretz, I., Britvitch, M., Camara, E., Carmona, S., Commichau, J. L., Contrera, J., Cortina, M. T., Costado, S., Covino, V., Curtef, F., Dazzi, A. D., Angeli, E. D., del Pozo, R. d., los Reye, B. D., Lotto, M. D., Maria, F. D., Sabata, C. D., Mendez, A., Dominguez, D., Dorner, M., Doro, D., Elsaesser, M., Errando, D., Ferenc, E., Fernandez, R., Firpo, M. V., Fonseca, L., Font, N., Galante, R. J. G., Lopez, M., Garczarczyk, M., Gaug, F., Goebel, D., Hadasch, M., Hayashida, A., Herrero, D., Hildebrand, D., Hohne Monch, J., Hose, C. C., Hsu, T., Jogler, D., Kranich, A. L., Barbera, A., Laille, E., Leonardo, E., Lindfor, S., Lombardi, Longo, Francesco, M., Lopez, E., Lorenz, P., Majumdar, G., Maneva, N., Mankuzhiyil, K., Mannheim, L., Maraschi, M., Mariotti, M., Martinez, D., Mazin, M., Meucci, M., Meyer, J. M., Miranda, R., Mirzoyan, H., Miyamoto, J., Moldon, M., Mole, A., Moralejo, D., Nieto, K., Nilsson, J., Ninkovic, N., Otte, I., Oya, R., Paoletti, J. M., Parede, M., Pasanen, D., Pascoli, F., Pau, G., Pegna, M. A., Perez Torre, M., Persic, L., Peruzzo, F., Prada, E., Prandini, N., Puchade, I., Reichardt, W., Rhode, M., Ribo, J., Rico, M., Rissi, A., Robert, S., Rugamer, A., Saggion, T. Y., Saito, M., Salvati, M., Sanchez Conde, K., Satalecka, V., Scalzotto, V., Scapin, T., Schweizer, M., Shayduk, S. N., Shore, N., Sidro, A., Sierpowska Bartosik, A., Sillanpaa, J., Sitarek, D., Sobczynska, F., Spanier, A., Stamerra, L. S., Stark, L., Takalo, F., Tavecchio, P., Temnikov, D., Tescaro, M., Teshima, M., Tluczykont, D. F., Torre, N., Turini, H., Vankov, R. M., Wagner, W., Wittek, V., Zabalza, F., Zandanel, R., Zanin, J., Zapatero, R., Sato, M., Ushio, J., Kataoka, G., Madejski, T., Takahashi, and Universitat de Barcelona
Subjects: GAMMA-RAY OBSERVATION, Photon, PARTICLE-ACCELERATION, Flux, Astrophysics, Electron, 01 natural sciences, Spectral line, Raigs gamma, Observacions astronòmiques, TEV BLAZAR, MAGIC (telescope), 010303 astronomy & astrophysics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Very High Energy Gamma-ray Astronomy, MAGIC telescope, Active Galactic Nuclei, Lorentz factor, symbols, Electrónica, Física nuclear, Raigs X, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics, Astronomical observations, ACTIVE GALACTIC NUCLEI, Cosmology and Nongalactic Astrophysics (astro-ph.CO), GALAXY MARKARIAN-421, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, BL-LACERTAE OBJECTS, HIGH-ENERGY EMISSION, X-RAY, LAC OBJECTS, PHYSICAL PARAMETERS, symbols.namesake, 0103 physical sciences, X-rays, Blazar, 010308 nuclear & particles physics, Gamma rays, Astronomy and Astrophysics, Galaxies, Galàxies, Crab Nebula, Space and Planetary Science, ddc:520
Abstract: 著者人数：149名, Accepted: 2009-09-28, 資料番号: SA1000976000
Published: 2009
Full Text: View/download PDF

28. PERIODIC VERY HIGH ENERGY gamma-RAY EMISSION FROM LS I+61 degrees 303 OBSERVED WITH THE MAGIC TELESCOPE RID B-5372-2009

Author: Albert, J, Aliu, E, Anderhub, H, Antonelli, La, Antoranz, P, Backes, M, Baixeras, C, Barrio, Ja, Bartko, H, Bastieri, D, Becker, Jk, Bednarek, W, Berger, K, Bernardini, E, Bigongiari, C, Biland, A, Bock, Rk, Bonnoli, G, Bordas, P, Bosch Ramon, V, Bretz, T, Britvitch, I, Camara, M, Carmona, E, Chilingarian, A, Commichau, S, Contreras, Jl, Cortina, J, Costado, Mt, Covino, S, Curtef, V, Dazzi, F, De Angelis, A, del Pozo ED, de los Reyes, R, De Lotto, B, De Maria, M, De Sabata, F, Mendez, Cd, Dominguez, A, Dorner, D, Doro, M, Errando, M, Fagiolini, M, Ferenc, D, Fernandez, E, Firpo, R, Fonseca, Mv, Font, L, Galante, N, Lopez, Rjg, Garczarczyk, M, Gaug, M, Goebel, F, Hayashida, M, Herrero, A, Hohne, D, Hose, J, Hsu, Cc, Huber, S, Jogler, T, Kranich, D, La Barbera, A, Laille, A, Leonardo, E, Lindfors, E, Lombardi, S, Longo, F, Lopez, M, Lorenz, E, Majumdar, P, Maneva, G, Mankuzhiyil, N, Mannheim, K, Maraschi, L, Mariotti, M, Martinez, M, Mazin, D, Meucci, M, Meyer, M, Miranda, Jm, Mirzoyan, R, Mizobuchi, S, Moles, M, Moralejo, A, Nieto, D, Nilsson, K, Ninkovic, J, Otte, N, Oya, I, Panniello, M, Paoletti, R, Paredes, Jm, Pasanen, M, Pascoli, D, Pauss, F, Pegna, Rg, Perez Torres MA, Persic, M, Peruzzo, L, Piccioli, A, Prada, F, Prandini, E, Puchades, N, Raymers, A, Rhode, W, Ribo, M, Rico, J, Rissi, M, Robert, A, Rugamer, S, Saggion, A, Saito, Ty, Salvati, M, Sanchez Conde, M, Sartori, P, Satalecka, K, Scalzotto, V, Scapin, V, Schmitt, R, Schweizer, T, Shayduk, M, Shinozaki, K, Shore, STEVEN NEIL, Sidro, N, Sierpowska Bartosik, A, Sillanpaa, A, Sobczynska, D, Spanier, F, Stamerra, A, Stark, Ls, Takalo, L, Tavecchio, F, Temnikov, P, Tescaro, D, Teshima, M, Tluczykont, M, Torres, Df, Turini, N, Vankov, H, Venturini, A, Vitale, V, Wagner, Rm, Wittek, W, Zabalza, V, Zandanel, F, Zanin, R, and Zapatero, J.
Published: 2009

29. SIMULTANEOUS MULTIWAVELENGTH OBSERVATIONS OF MARKARIAN 421 DURING OUTBURST

Author: Acciari, Va, Aliu, E, Aune, T, Beilicke, M, Benbow, W, Bottcher, M, Bradbury, Sm, Buckley, Jh, Bugaev, V, Butt, Y, Cannon, A, Celik, O, Cesarini, A, Chow, Yc, Ciupik, L, Cogan, P, Colin, P, Cui, W, Dickherber, R, Duke, C, Falcone, Ad, Fegan, Sj, Finley, Jp, Finnegan, G, Fortin, P, Fortson, L, Furniss, A, Gall, D, Gillanders, Gh, Grube, J, Guenette, R, Gyuk, G, Hanna, D, Holder, J, Horan, D, Hui, Cm, Humensky, Tb, Kaaret, P, Karlsson, N, Kertzman, M, Kieda, D, Kildea, J, Konopelko, A, Krawczynski, H, Krennrich, F, Lang, Mj, Lebohec, S, Maier, G, Mccann, A, Millis, J, Moriarty, P, Ong, Ra, Otte, An, Pandel, D, Perkins, Js, Pichel, A, Pohl, M, Quinn, J, Ragan, K, Reyes, Lc, Reynolds, Pt, Roache, E, Rose, Hj, Schroedter, M, Sembroski, Gh, Smith, Aw, Steele, D, Swordy, Sp, Theiling, M, Toner, Ja, Varlotta, A, Vincent, S, Wakely, Sp, Ward, Je, Weekes, Tc, Weinstein, A, Weisgarber, T, Williams, Da, Wissel, S, Zitzer, B, Perez, Id, Ibarra, A, Anderhub, Prh, Antonelli, La, Antoranz, P, Backes, M, Baixeras, C, Balestra, S, Barrio, Ja, Bastieri, D, Gonzalez, Jb, Becker, Jk, Bednarek, W, Berger, K, Bernardini, E, Biland, A, Bock, Rk, Bonnoli, G, Bordas, P, Tridon, Db, Bosch Ramon, V, Bose, D, Braun, I, Bretz, T, Britvitch, I, Camara, M, Carmona, E, Carosi, A, Commichau, S, Contreras, Jl, Cortina, J, Costado, Mt, Covino, S, Curtef, V, Dazzi, F, DE ANGELIS, Alessandro, Del Pozo ED, Mendez, Cd, De Los Reyes, R, DE LOTTO, Barbara, De Maria, M, De Sabata, F, Dominguez, A, Dorner, D, Doro, M, Elsaesser, D, Errando, M, Ferenc, D, Fernandez, E, Firpo, R, Fonseca, Mv, Font, L, Galante, N, Lopez, Rj, Garczarczyk, M, Gaug, M, Goebel, F, Hadasch, D, Hayashida, M, Herrero, A, Hildebrand, D, Hohne Monch, D, Hose, J, Hsu, Cc, Jogler, T, Kranich, D, La Barbera, A, Laille, A, Leonardo, E, Lindfors, E, Lombardi, S, Longo, F, Lopez, M, Lorenz, E, Majumdar, P, Maneva, G, Mankuzhiyil, N, Mannheim, K, Maraschi, L, Mariotti, M, Martinez, M, Mazin, D, Meucci, M, Miranda, Jm, Mirzoyan, R, Miyamoto, H, Moldon, J, Moles, M, Moralejo, A, Nieto, D, Nilsson, K, Ninkovic, J, Orito, R, Oya, I, Paoletti, R, Paredes, Jm, Pasanen, M, Pascoli, D, Pauss, F, Pegna, Rg, Perez Torres MA, Persic, M, Peruzzo, L, Prada, F, Prandini, E, Puchades, N, Reichardt, I, Rhode, W, Ribo, M, Rico, J, Rissi, M, Robert, A, Rugamer, S, Saggion, A, Saito, Ty, Salvati, M, Sanchez Conde, M, Satalecka, K, Scalzotto, V, Scapin, V, Schweizer, T, Shayduk, M, Shore, Sn, Sidro, N, Sierpowska Bartosik, A, Silanpaa, A, Sitarek, J, Sobczynska, D, Spanier, F, Spiro, S, Stamerra, A, Stark, Ls, Takalo, L, Tavecchio, F, Temnikov, P, Tescaro, D, Teshima, M, Tluczykont, M, Torres, Df, Turini, N, Vankov, H, Wagner, Rm, Zabalza, V, Zandanel, F, Zanin, R, Zapatero, J., V. A., Acciari, E., Aliu, T., Aune, M., Beilicke, W., Benbow, M., Bottcher, S. M., Bradbury, J. H., Buckley, V., Bugaev, Y., Butt, A., Cannon, O., Celik, A., Cesarini, Y. C., Chow, L., Ciupik, P., Cogan, P., Colin, W., Cui, R., Dickherber, C., Duke, A. D., Falcone, S. J., Fegan, J. P., Finley, G., Finnegan, P., Fortin, L., Fortson, A., Furni, D., Gall, G. H., Gillander, J., Grube, R., Guenette, G., Gyuk, D., Hanna, J., Holder, D., Horan, C. M., Hui, T. B., Humensky, P., Kaaret, N., Karlsson, M., Kertzman, D., Kieda, J., Kildea, A., Konopelko, H., Krawczynski, F., Krennrich, M. J., Lang, S., Lebohec, G., Maier, A., Mccann, J., Milli, P., Moriarty, R. A., Ong, A. N., Otte, D., Pandel, J. S., Perkin, A., Pichel, M., Pohl, J., Quinn, K., Ragan, L. C., Reye, P. T., Reynold, E., Roache, H. J., Rose, M., Schroedter, G. H., Sembroski, A. W., Smith, D., Steele, S. P., Swordy, M., Theiling, J. A., Toner, A., Varlotta, S., Vincent, S. P., Wakely, J. E., Ward, T. C., Weeke, A., Weinstein, T., Weisgarber, D. A., William, S., Wissel, B., Zitzer, I. D., Perez, A., Ibarra, P. R. H., Anderhub, L. A., Antonelli, P., Antoranz, M., Backe, C., Baixera, S., Balestra, J. A., Barrio, D., Bastieri, J. B., Gonzalez, J. K., Becker, W., Bednarek, K., Berger, E., Bernardini, A., Biland, R. K., Bock, G., Bonnoli, P., Borda, D. B., Tridon, V., Bosch Ramon, D., Bose, I., Braun, T., Bretz, I., Britvitch, M., Camara, E., Carmona, A., Carosi, S., Commichau, J. L., Contrera, J., Cortina, M. T., Costado, S., Covino, V., Curtef, F., Dazzi, A. D., Angeli, E. D., Del Pozo, C. D., Mendez, R. D., Los Reye, B. D., Lotto, M. D., Maria, F. D., Sabata, A., Dominguez, D., Dorner, M., Doro, D., Elsaesser, M., Errando, D., Ferenc, E., Fernandez, R., Firpo, M. V., Fonseca, L., Font, N., Galante, R. J., Lopez, M., Garczarczyk, M., Gaug, F., Goebel, D., Hadasch, M., Hayashida, A., Herrero, D., Hildebrand, D., Hohne Monch, J., Hose, C. C., Hsu, T., Jogler, D., Kranich, A. L., Barbera, A., Laille, E., Leonardo, E., Lindfor, S., Lombardi, Longo, Francesco, M., Lopez, E., Lorenz, P., Majumdar, G., Maneva, N., Mankuzhiyil, K., Mannheim, L., Maraschi, M., Mariotti, M., Martinez, D., Mazin, M., Meucci, J. M., Miranda, R., Mirzoyan, H., Miyamoto, J., Moldon, M., Mole, A., Moralejo, D., Nieto, K., Nilsson, J., Ninkovic, R., Orito, I., Oya, R., Paoletti, J. M., Parede, M., Pasanen, D., Pascoli, F., Pau, R. G., Pegna, M. A., Perez Torre, M., Persic, L., Peruzzo, F., Prada, E., Prandini, N., Puchade, I., Reichardt, W., Rhode, M., Ribo, J., Rico, M., Rissi, A., Robert, S., Rugamer, A., Saggion, T. Y., Saito, M., Salvati, M., Sanchez Conde, K., Satalecka, V., Scalzotto, V., Scapin, T., Schweizer, M., Shayduk, S. N., Shore, N., Sidro, A., Sierpowska Bartosik, A., Silanpaa, J., Sitarek, D., Sobczynska, F., Spanier, S., Spiro, A., Stamerra, L. S., Stark, L., Takalo, F., Tavecchio, P., Temnikov, D., Tescaro, M., Teshima, M., Tluczykont, D. F., Torre, N., Turini, H., Vankov, R. M., Wagner, V., Zabalza, F., Zandanel, R., Zanin, J., Zapatero, and Universitat de Barcelona
Subjects: bl lacertae objects: individual (markarian 421), 01 natural sciences, law.invention, ENERGY, Raigs gamma, ACTIVE GALAXY MARKARIAN-421, law, Observacions astronòmiques, RAY SPECTRAL VARIABILITY, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Very High Energy Gamma-ray Astronomy, MAGIC telescope, Active Galactic Nuclei, Astrophysics::Instrumentation and Methods for Astrophysics, CORRELATED VARIABILITY, TEV PHOTONS, Wavelength, Electrónica, Física nuclear, Raigs X, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, Astronomical observations, GALACTIC NUCLEI, Astrophysics::High Energy Astrophysical Phenomena, galaxies: active, FOS: Physical sciences, Telescope, 0103 physical sciences, X-rays, Blazar, x-rays: galaxies, XMM-NEWTON, 010308 nuclear & particles physics, Gamma rays, GAMMA-RAYS, Astronomy, Spectral density, Astronomy and Astrophysics, radiation mechanisms: non-thermal, Galaxies, Galàxies, MAGIC TELESCOPE, RADIATION, 13. Climate action, Space and Planetary Science, Satellite, gamma rays: observations
Abstract: We report on the results of two coordinated multiwavelength campaigns that focused on the blazar Markarian 421 during its 2006 and 2008 outbursts. These campaigns obtained UV and X-ray data using the XMM-Newton satellite, while the gamma-ray data were obtained utilizing three imaging atmospheric Cerenkov telescopes, the Whipple 10m telescope and VERITAS, both based in Arizona, as well as the MAGIC telescope, based on La Palma in the Canary Islands. The coordinated effort between the gamma-ray groups allowed for truly simultaneous data in UV/X-ray/gamma-ray wavelengths during a significant portion of the XMM-Newton observations. This simultaneous coverage allowed for a reliable search for correlations between UV, X-ray and gamma-ray variability over the course of the observations. Investigations of spectral hysteresis and modeling of the spectral energy distributions are also presented., Comment: 27 pages, 5 figures, Accepted for publication in The Astrophysical Journal
Published: 2009

30. PERIODIC VERY HIGH ENERGY gamma-RAY EMISSION FROM LS I+61 degrees 303 OBSERVED WITH THE MAGIC TELESCOPE

Author: Albert, J., Aliu, E., Anderhub, H., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Barrio, J. A., Bartko, H., Bastieri, D., Becker, J. K., Bednarek, W., Berger, K., Bernardini, E., Bigongiari, C., Biland, A., Bock, R. K., Bonnoli, G., Bordas, P., Bosch Ramon, V., Bretz, T., Britvitch, I., Camara, M., Carmona, E., Chilingarian, A., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Curtef, V., Dazzi, F., Angelis, A. D., del Pozo, E. D., los Reyes, R. d., Lotto, B. D., Maria, M. D., Sabata, F. D., Mendez, C. D., Dominguez, A., Dorner, D., Doro, M., Errando, M., Fagiolini, M., Ferenc, D., Fernandez, E., Firpo, R., Fonseca, M. V., Font, L., Galante, N., Lopez, R. J. G., Garczarczyk, M., Gaug, M., Goebel, F., Hayashida, M., Herrero, A., Hohne, D., Hose, J., Hsu, C. C., Huber, S., Jogler, T., Kranich, D., Barbera, A. L., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, Francesco, Lopez, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Meucci, M., Meyer, M., Miranda, J. M., Mirzoyan, R., Mizobuchi, S., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Otte, N., Oya, I., Panniello, M., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez Torres, M. A., Persic, M., Peruzzo, L., Piccioli, A., Prada, F., Prandini, E., Puchades, N., Raymers, A., Rhode, W., Ribo, M., Rico, J., Rissi, M., Robert, A., Rugamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sanchez Conde, M., Sartori, P., Satalecka, K., Scalzotto, V., Scapin, V., Schmitt, R., Schweizer, T., Shayduk, M., Shinozaki, K., Shore, S. N., Sidro, N., Sierpowska Bartosik, A., Sillanpaa, A., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L. S., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Tluczykont, M., Torres, D. F., Turini, N., Vankov, H., Venturini, A., Vitale, V., Wagner, R. M., Wittek, W., Zabalza, V., Zandanel, F., Zanin, R., Zapatero, J., J., Albert, E., Aliu, H., Anderhub, L. A., Antonelli, P., Antoranz, M., Backe, C., Baixera, J. A., Barrio, H., Bartko, D., Bastieri, J. K., Becker, W., Bednarek, K., Berger, E., Bernardini, C., Bigongiari, A., Biland, R. K., Bock, G., Bonnoli, P., Borda, V., Bosch Ramon, T., Bretz, I., Britvitch, M., Camara, E., Carmona, A., Chilingarian, S., Commichau, J. L., Contrera, J., Cortina, M. T., Costado, S., Covino, V., Curtef, F., Dazzi, A. D., Angeli, E. D., del Pozo, R. d., los Reye, B. D., Lotto, M. D., Maria, F. D., Sabata, C. D., Mendez, A., Dominguez, D., Dorner, M., Doro, M., Errando, M., Fagiolini, D., Ferenc, E., Fernandez, R., Firpo, M. V., Fonseca, L., Font, N., Galante, R. J. G., Lopez, M., Garczarczyk, M., Gaug, F., Goebel, M., Hayashida, A., Herrero, D., Hohne, J., Hose, C. C., Hsu, S., Huber, T., Jogler, D., Kranich, A. L., Barbera, A., Laille, E., Leonardo, E., Lindfor, S., Lombardi, Longo, Francesco, M., Lopez, E., Lorenz, P., Majumdar, G., Maneva, N., Mankuzhiyil, K., Mannheim, L., Maraschi, M., Mariotti, M., Martinez, D., Mazin, M., Meucci, M., Meyer, J. M., Miranda, R., Mirzoyan, S., Mizobuchi, M., Mole, A., Moralejo, D., Nieto, K., Nilsson, J., Ninkovic, N., Otte, I., Oya, M., Panniello, R., Paoletti, J. M., Parede, M., Pasanen, D., Pascoli, F., Pau, R. G., Pegna, M. A., Perez Torre, M., Persic, L., Peruzzo, A., Piccioli, F., Prada, E., Prandini, N., Puchade, A., Raymer, W., Rhode, M., Ribo, J., Rico, M., Rissi, A., Robert, S., Rugamer, A., Saggion, T. Y., Saito, M., Salvati, M., Sanchez Conde, P., Sartori, K., Satalecka, V., Scalzotto, V., Scapin, R., Schmitt, T., Schweizer, M., Shayduk, K., Shinozaki, S. N., Shore, N., Sidro, A., Sierpowska Bartosik, A., Sillanpaa, D., Sobczynska, F., Spanier, A., Stamerra, L. S., Stark, L., Takalo, F., Tavecchio, P., Temnikov, D., Tescaro, M., Teshima, M., Tluczykont, D. F., Torre, N., Turini, H., Vankov, A., Venturini, V., Vitale, R. M., Wagner, W., Wittek, V., Zabalza, F., Zandanel, R., Zanin, and J., Zapatero
Subjects: Very High Energy Gamma-ray Astronomy, MAGIC telescope, Gamma-ray Binaries, gamma ray astronomy, Cosmic rays, IMAGING CHERENKOV DETECTOR
Abstract: The MAGIC collaboration has recently reported the discovery of gamma-ray emission from the binary system LS I +61 degrees 303 in the TeV energy region. Here we present new observational results on this source in the energy range between 300 GeV and 3 TeV. In total, 112 hr of data were taken between 2006 September and December covering four orbital cycles of this object. This large amount of data allowed us to produce an integral flux light curve covering for the first time all orbital phases of LS I +61 degrees 303. In addition, we also obtained a differential energy spectrum for two orbital phase bins covering the phase range 0.5 < phi < 0.6 and 0.6 < phi < 0.7. The photon index in the two phase bins is consistent within the errors with an average index Gamma = 2.6 +/- 0.2(stat) +/- 0.2(sys). LS I +61 degrees 303 was found to be variable at TeV energies on timescales of days. These new MAGIC measurements allowed us to search for intranight variability of the very high energy emission; however, no evidence for flux variability on timescales down to 30 min was found. To test for possible periodic structures in the light curve, we apply the formalism developed by Lomb and Scargle to the LS I +61 degrees 303 data taken in 2005 and 2006. We found the LS I +61 degrees 303 data set to be periodic with a period of (26.8 +/- 0.2) days (with a post-trial chance probability of 10(-7)), close to the orbital period.
Published: 2009

31. Radio imaging of the very-high-energy gamma-ray emission region in the central engine of a radio galaxy

Author: Veritas, Collaboration, Monitoring Team, Vlba Ghz M., Collaboration, H. E. S. S., Magic, Collaboration, Acciari, V. A., Aliu, E., Arlen, T., Bautista, M., Beilicke, M., Benbow, W., Bradbury, S. M., Buckley, J. H., Bugaev, V., Butt, Y., Byrum, K., Cannon, A., Celik, O., Cesarini, A., Chow, Y. C., Ciupik, L., Cogan, P., Cui, W., Dickherber, R., Fegan, S. J., Finley, J. P., Fortin, P., Fortson, L., Furniss, A., Gall, D., Gillanders, G. H., Grube, J., Guenette, R., Gyuk, G., Hanna, D., Holder, J., Horan, D., Hui, C. M., Humensky, T. B., Imran, A., Kaaret, P., Karlsson, N., Kieda, D., Kildea, J., Konopelko, A., Krawczynski, H., Krennrich, F., Lang, M. J., Lebohec, S., Maier, G., Mccann, A., Mccutcheon, M., Millis, J., Moriarty, P., Ong, R. A., Otte, A. N., Pandel, D., Perkins, J. S., Petry, D., Pohl, M., Quinn, J., Ragan, K., Reyes, L. C., Reynolds, P. T., Roache, E., Rose, H. J., Schroedter, M., Sembroski, G. H., Smith, A. W., Swordy, S. P., Theiling, M., Toner, J. A., Varlotta, A., Vincent, S., Wakely, S. P., Ward, J. E., Weekes, T. C., Weinstein, A., Williams, D. A., Wissel, S., Wood, M., Walker, R. C., Davies, F., Hardee, P. E., Junor, W., Ly, C., Aharonian, F., Akhperjanian, A. G., Anton, G., Barres Almeida, U., Bazer-Bachi, A. R., Becherini, Y., Behera, B., Bernlohr, K., Bochow, A., Boisson, C., Bolmont, J., Borrel, V., Brucker, J., Brun, F., Brun, P., Buhler, R., Bulik, T., Busching, I., Boutelier, T., Chadwick, P. M., Charbonnier, A., Chaves, R. C. G., Cheesebrough, A., Chounet, L-M, Clapson, A. C., Coignet, G., Dalton, M., Daniel, M. K., Davids, I. D., Degrange, B., Deil, C., Dickinson, H. J., Djannati-Atai, A., Domainko, W., Drury, L. O. C., Dubois, F., Dubus, G., Dyks, J., Dyrda, M., Egberts, K., Emmanoulopoulos, D., Espigat, P., Farnier, C., Feinstein, F., Fiasson, A., Forster, A., Fontaine, G., Fussling, M., Gabici, S., Gallant, Y. A., Gerard, L., Gerbig, D., Giebels, B., Glicenstein, J. F., Gluck, B., Goret, P., Gohring, D., Hauser, D., Hauser, M., Heinz, S., Heinzelmann, G., Henri, G., Hermann, G., Hinton, J. A., Hoffmann, A., Hofmann, W., Holleran, M., Hoppe, S., Horns, D., Jacholkowska, A., Jager, O. C., Jahn, C., Jung, I., Katarzynski, K., Katz, U., Kaufmann, S., Kendziorra, E., Kerschhaggl, M., Khangulyan, D., Khelifi, B., Keogh, D., Kluzniak, W., Kneiske, T., Komin, Nu, Kosack, K., Lamanna, G., Lenain, J-P, Lohse, T., Marandon, V., Martin, J. M., Martineau-Huynh, O., Marcowith, A., Maurin, D., Mccomb, T. J. L., Medina, M. C., Moderski, R., Moulin, E., Naumann-Godo, M., Naurois, M., Nedbal, D., Nekrassov, D., Nicholas, B., Niemiec, J., Nolan, S. J., Ohm, S., Olive, J-F, Ona Wilhelmi, E., Orford, K. J., Ostrowski, M., Panter, M., Paz Arribas, M., Pedaletti, G., Pelletier, G., Petrucci, P-O, Pita, S., Puhlhofer, G., Punch, M., Quirrenbach, A., Raubenheimer, B. C., Raue, M., Rayner, S. M., Renaud, M., Rieger, F., Ripken, J., Rob, L., Rosier-Lees, S., Rowell, G., Rudak, B., Rulten, C. B., Ruppel, J., Sahakian, V., Santangelo, A., Schlickeiser, R., Schock, F. M., Schroder, R., Schwanke, U., Schwarzburg, S., Schwemmer, S., Shalchi, A., Sikora, M., Skilton, J. L., Sol, H., Spangler, D., Stawarz, L., Steenkamp, R., Stegmann, C., Stinzing, F., Superina, G., Szostek, A., Tam, P. H., Tavernet, J-P, Terrier, R., Tibolla, O., Tluczykont, M., Christopher van Eldik, Vasileiadis, G., Venter, C., Venter, L., Vialle, J. P., Vincent, P., Vivier, M., Volk, H. J., Volpe, F., Wagner, S. J., Ward, M., Zdziarski, A. A., Zech, A., Anderhub, H., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Balestra, S., Barrio, J. A., Bastieri, D., Becerra Gonzalez, J., Becker, J. K., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Bock, R. K., Bonnoli, G., Bordas, P., Borla Tridon, D., Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britvitch, I., Camara, M., Carmona, E., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Curtef, V., Dazzi, F., Angelis, A., Cea Del Pozo, E., Delgado Mendez, C., Los Reyes, R., Lotto, B., Maria, M., Sabata, F., Dominguez, A., Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fernandez, E., Firpo, R., Fonseca, M. V., Font, L., Galante, N., Garcia Lopez, R. J., Garczarczyk, M., Gaug, M., Goebel, F., Hadasch, D., Hayashida, M., Herrero, A., Hildebrand, D., Hohne-Monch, D., Hose, J., Hsu, C. C., Jogler, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldon, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Oya, I., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Reichardt, I., Rhode, W., Ribo, M., Rico, J., Rissi, M., Robert, A., Rugamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Shore, S. N., Sidro, N., Sierpowska-Bartosik, A., Sillanpaa, A., Sitarek, J., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L. S., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Torres, D. F., Turini, N., Vankov, H., Wagner, R. M., Zabalza, V., Zandanel, F., Zanin, R., Zapatero, J., Centre d'étude spatiale des rayonnements (CESR), Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire Univers et Théories (LUTH (UMR_8102)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire d'Astrophysique de Grenoble (LAOG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), APC - Astrophysique des Hautes Energies (APC - AHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Dipartimento di Astronomia, Universita degli Studi di Bologna, Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO)-Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), HESS, Universitat de Barcelona, Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Dipartimento di Astronomia, Universita degli Studi di Bologna, Università di Bologna [Bologna] (UNIBO)-Università di Bologna [Bologna] (UNIBO)-AstroParticule et Cosmologie (APC (UMR_7164)), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), V. A., Acciari, E., Aliu, T., Arlen, M., Bautista, M., Beilicke, W., Benbow, S. M., Bradbury, J. H., Buckley, V., Bugaev, Y., Butt, K., Byrum, A., Cannon, O., Celik, A., Cesarini, Y. C., Chow, L., Ciupik, P., Cogan, W., Cui, R., Dickherber, S. J., Fegan, J. P., Finley, P., Fortin, L., Fortson, A., Furni, D., Gall, G. H., Gillander, J., Grube, R., Guenette, G., Gyuk, D., Hanna, J., Holder, D., Horan, C. M., Hui, T. B., Humensky, A., Imran, P., Kaaret, N., Karlsson, D., Kieda, J., Kildea, A., Konopelko, H., Krawczynski, F., Krennrich, M. J., Lang, S., Lebohec, G., Maier, A., Mccann, M., Mccutcheon, J., Milli, P., Moriarty, R. A., Ong, A. N., Otte, D., Pandel, J. S., Perkin, D., Petry, M., Pohl, J., Quinn, K., Ragan, L. C., Reye, P. T., Reynold, E., Roache, H. J., Rose, M., Schroedter, G. H., Sembroski, A. W., Smith, S. P., Swordy, M., Theiling, J. A., Toner, A., Varlotta, S., Vincent, S. P., Wakely, J. E., Ward, T. C., Weeke, A., Weinstein, D. A., William, S., Wissel, M., Wood, R. C., Walker, F., Davie, P. E., Hardee, W., Junor, C., Ly, F., Aharonian, A. G., Akhperjanian, G., Anton, U. B., de Almeida, A. R., Bazer Bachi, Y., Becherini, B., Behera, K., Bernlohr, A., Bochow, C., Boisson, J., Bolmont, V., Borrel, J., Brucker, F., Brun, P., Brun, R., Buhler, T., Bulik, I., Busching, T., Boutelier, P. M., Chadwick, A., Charbonnier, R. C. G., Chave, A., Cheesebrough, L. M., Chounet, A. C., Clapson, G., Coignet, M., Dalton, M. K., Daniel, I. D., David, B., Degrange, C., Deil, H. J., Dickinson, A., Djannati Atai, W., Domainko, L. O., Drury, F., Duboi, G., Dubu, J., Dyk, M., Dyrda, K., Egbert, D., Emmanoulopoulo, P., Espigat, C., Farnier, F., Feinstein, A., Fiasson, A., Forster, G., Fontaine, M., Fussling, S., Gabici, Y. A., Gallant, L., Gerard, D., Gerbig, B., Giebel, J. F., Glicenstein, B., Gluck, P., Goret, D., Gohring, D., Hauser, M., Hauser, S., Heinz, G., Heinzelmann, G., Henri, G., Hermann, J. A., Hinton, A., Hoffmann, W., Hofmann, M., Holleran, S., Hoppe, D., Horn, A., Jacholkowska, O. C., de Jager, C., Jahn, I., Jung, K., Katarzynski, U., Katz, S., Kaufmann, E., Kendziorra, M., Kerschhaggl, D., Khangulyan, B., Khelifi, D., Keogh, W., Kluzniak, T., Kneiske, N., Komin, K., Kosack, G., Lamanna, J. P., Lenain, T., Lohse, V., Marandon, J. M., Martin, O., Martineau Huynh, A., Marcowith, D., Maurin, T. J. L., Mccomb, M. C., Medina, R., Moderski, E., Moulin, M., Naumann Godo, M. d., Nauroi, D., Nedbal, D., Nekrassov, B., Nichola, J., Niemiec, S. J., Nolan, S., Ohm, J. F., Olive, E. D., Wilhelmi, K. J., Orford, M., Ostrowski, M., Panter, M. P., Arriba, G., Pedaletti, G., Pelletier, P. O., Petrucci, S., Pita, M., Raue, S. M., Rayner, M., Renaud, F., Rieger, J., Ripken, L., Rob, S., Rosier Lee, G., Rowell, B., Rudak, C. B., Rulten, J., Ruppel, V., Sahakian, A., Santangelo, R., Schlickeiser, F. M., Schock, R., Schroder, U., Schwanke, S., Schwarzburg, S., Schwemmer, A., Shalchi, M., Sikora, J. L., Skilton, H., Sol, D., Spangler, L., Stawarz, R., Steenkamp, C., Stegmann, F., Stinzing, G., Superina, A., Szostek, P. H., Tam, J. P., Tavernet, R., Terrier, O., Tibolla, M., Tluczykont, C. v., Eldik, G., Vasileiadi, C., Venter, L., Venter, J. P., Vialle, P., Vincent, M., Vivier, H. J., Volk, F., Volpe, S. J., Wagner, M., Ward, A. A., Zdziarski, A., Zech, H., Anderhub, L. A., Antonelli, P., Antoranz, M., Backe, C., Baixera, S., Balestra, J. A., Barrio, D., Bastieri, J. B., Gonzlez, J. K., Becker, W., Bednarek, K., Berger, E., Bernardini, A., Biland, R. K., Bock, G., Bonnoli, P., Borda, D. B., Tridon, V., Bosch Ramon, D., Bose, I., Braun, T., Bretz, I., Britvitch, M., Camara, E., Carmona, S., Commichau, J. L., Contrera, J., Cortina, M. T., Costado, S., Covino, V., Curtef, F., Dazzi, A. D., Angeli, E. D., Del Pozo, C. D., Mendez, R. D., los Reye, B. D., Lotto, M. D., Maria, F. D., Sabata, A., Dominguez, D., Dorner, M., Doro, D., Elsaesser, M., Errando, D., Ferenc, E., Fernndez, R., Firpo, M. V., Fonseca, L., Font, N., Galante, R. J. G., Lopez, M., Garczarczyk, M., Gaug, F., Goebel, D., Hadasch, M., Hayashida, A., Herrero, D., Hildebrand, D., Hohne Monch, J., Hose, C. C., Hsu, T., Jogler, D., Kranich, A. L., Barbera, A., Laille, E., Leonardo, E., Lindfor, S., Lombardi, Longo, Francesco, M., Lopez, E., Lorenz, P., Majumdar, G., Maneva, N., Mankuzhiyil, K., Mannheim, L., Maraschi, M., Mariotti, M., Martinez, D., Mazin, M., Meucci, J. M., Miranda, R., Mirzoyan, H., Miyamoto, J., Moldon, M., Mole, A., Moralejo, D., Nieto, K., Nilsson, J., Ninkovic, I., Oya, R., Paoletti, J. M., Parede, M., Pasanen, D., Pascoli, F., Pau, R. G., Pegna, M. A., Perez Torre, M., Persic, L., Peruzzo, F., Prada, E., Prandini, N., Puchade, I., Reichardt, W., Rhode, M., Ribo, J., Rico, M., Rissi, A., Robert, S., Rugamer, A., Saggion, T. Y., Saito, M., Salvati, M., Sanchez Conde, K., Satalecka, V., Scalzotto, V., Scapin, T., Schweizer, M., Shayduk, S. N., Shore, N., Sidro, A., Sierpowska Bartosik, A., Sillanpaa, J., Sitarek, D., Sobczynska, F., Spanier, A., Stamerra, L. S., Stark, L., Takalo, F., Tavecchio, P., Temnikov, D., Tescaro, M., Teshima, D. F., Torre, N., Turini, H., Vankov, R. M., Wagner, V., Zabalza, F., Zandanel, R., Zanin, and J., Zapatero
Subjects: m87 jet, Radio galaxy, Astrophysics, telescope, 01 natural sciences, Astroparticle, Jets (Astrofísica), Radio astronomy, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, tev emission, Multidisciplinary, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Gamma ray, 3. Good health, Forats negres (Astronomia), Radioastronomia, Electrónica, Física nuclear, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, Very High Energy Gamma-ray Astronomy, MAGIC telescope, Galaxies, Radio wave, outburst, [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Active galactic nucleus, inner jet, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, X-shaped radio galaxy, veritas, 0103 physical sciences, Nucli galàctic actiu, crab-nebula, VHE Gamma ray, Astrophysics::Galaxy Astrophysics, Active galactic nuclei, variability, 010308 nuclear & particles physics, nucleus, Astronomy, Astrophysics - Astrophysics of Galaxies, Galaxy, Accretion (astrophysics), Astrophysical jets, Black hole, Cherenkov telescope, Astrophysics of Galaxies (astro-ph.GA), Black holes (Astronomy), supermassive black-hole
Abstract: The accretion of matter onto a massive black hole is believed to feed the relativistic plasma jets found in many active galactic nuclei (AGN). Although some AGN accelerate particles to energies exceeding 10^12 electron Volts (eV) and are bright sources of very-high-energy (VHE) gamma-ray emission, it is not yet known where the VHE emission originates. Here we report on radio and VHE observations of the radio galaxy M87, revealing a period of extremely strong VHE gamma-ray flares accompanied by a strong increase of the radio flux from its nucleus. These results imply that charged particles are accelerated to very high energies in the immediate vicinity of the black hole., Comment: 21 pages, 5 figures, published in Science, see: http://www.sciencemag.org/cgi/content/abstract/325/5939/444
Published: 2009

32. MAGIC upper limits to the VHE gamma-ray flux of 3C 454.3 in high emission state RID B-5372-2009

Author: Anderhub, H, Antonelli, La, Antoranz, P, Backes, M, Baixeras, C, Balestra, S, Barrio, Ja, Bartko, H, Bastieri, D, Gonzalez, Jb, Becker, Jk, Bednarek, W, Berger, K, Bernardini, E, Biland, A, Bock, Rk, Bonnoli, G, Bordas, P, Tridon, Db, Bosch Ramon, V, Bretz, T, Britvitch, I, Camara, M, Carmona, E, Commichau, S, Contreras, Jl, Cortina, J, Costado, Mt, Covino, S, Curtef, V, Dazzi, F, De Angelis, A, del Pozo ED, de los Reyes, R, De Lotto, B, De Maria, M, De Sabata, F, Mendez, Cd, Dominguez, A, Dorner, D, Doro, M, Elsaesser, D, Errando, M, Ferenc, D, Fernandez, E, Firpo, R, Fonseca, Mv, Font, L, Galante, N, Lopez, Rjg, Garczarczyk, M, Gaug, M, Goebel, F, Hadasch, D, Hayashida, M, Herrero, A, Hohne Monch, D, Hose, J, Hsu, Cc, Huber, S, Jogler, T, Kranich, D, La Barbera, A, Laille, A, Leonardo, E, Lindfors, E, Lombardi, S, Longo, F, Lopez, M, Lorenz, E, Majumdar, P, Maneva, G, Mankuzhiyil, N, Mannheim, K, Maraschi, L, Mariotti, M, Martinez, M, Mazin, D, Meucci, M, Meyer, M, Miranda, Jm, Mirzoyan, R, Moldon, J, Moles, M, Moralejo, A, Nieto, D, Nilsson, K, Ninkovic, J, Otte, N, Oya, I, Paoletti, R, Paredes, Jm, Pasanen, M, Pascoli, D, Pauss, F, Pegna, Rg, Perez Torres MA, Persic, M, Peruzzo, L, Prada, F, Prandini, E, Puchades, N, Rhode, W, Ribo, M, Rico, J, Rissi, M, Robert, A, Rugamer, S, Saggion, A, Saito, Ty, Salvati, M, Sanchez Conde, M, Sartori, P, Satalecka, K, Scalzotto, V, Scapin, V, Schweizer, T, Shayduk, M, Shinozaki, K, Shore, STEVEN NEIL, Sidro, N, Sierpowska Bartosik, A, Sillanpaa, A, Sitarek, J, Sobczynska, D, Spanier, F, Stamerra, A, Stark, Ls, Takalo, L, Tavecchio, F, Temnikov, P, Tescaro, D, Teshima, M, Tluczykont, M, Torres, Df, Turini, N, Vankov, H, Venturini, A, Vitale, V, Wagner, Rm, Wittek, W, Zabalza, V, Zandanel, F, Zanin, R, Zapatero, J, Vercellone, S, Donnarumma, I, D'Ammando, F, and Tavani, M.
Published: 2009

33. DISCOVERY OF A VERY HIGH ENERGY GAMMA-RAY SIGNAL FROM THE 3C 66A/B REGION RID B-5372-2009

Author: Aliu, E, Anderhub, H, Antonelli, La, Antoranz, P, Backes, M, Baixeras, C, Balestra, S, Barrio, Ja, Bartko, H, Bastieri, D, Gonzalez, Jb, Becker, Jk, Bednarek, W, Berger, K, Bernardini, E, Biland, A, Bock, Rk, Bonnoli, G, Bordas, P, Tridon, Db, Bosch Ramon, V, Bretz, T, Britvitch, I, Camara, M, Carmona, E, Chilingarian, A, Commichau, S, Contreras, Jl, Cortina, J, Costado, Mt, Covino, S, Curtef, V, Dazzi, F, De Angelis, A, del Pozo ED, de los Reyes, R, De Lotto, B, De Maria, M, De Sabata, F, Mendez, Cd, Dominguez, A, Dorner, D, Doro, M, Elsaesser, D, Errando, M, Ferenc, D, Fernandez, E, Firpo, R, Fonseca, Mv, Font, L, Galante, N, Lopez, Rjg, Garczarczyk, M, Gaug, M, Goebel, F, Hadasch, D, Hayashida, M, Herrero, A, Hohne Monch, D, Hose, J, Hsu, Cc, Huber, S, Jogler, T, Kranich, D, La Barbera, A, Laille, A, Leonardo, E, Lindfors, E, Lombardi, S, Longo, F, Lopez, M, Lorenz, E, Majumdar, P, Maneva, G, Mankuzhiyil, N, Mannheim, K, Maraschi, L, Mariotti, M, Martinez, M, Mazin, D, Meucci, M, Meyer, M, Miranda, Jm, Mirzoyan, R, Moldon, J, Moles, M, Moralejo, A, Nieto, D, Nilsson, K, Ninkovic, J, Otte, N, Oya, I, Paoletti, R, Paredes, Jm, Pasanen, M, Pascoli, D, Pauss, F, Pegna, Rg, Perez Torres MA, Persic, M, Peruzzo, L, Prada, F, Prandini, E, Puchades, N, Raymers, A, Rhode, W, Ribo, M, Rico, J, Rissi, M, Robert, A, Rugamer, S, Saggion, A, Saito, Ty, Salvati, M, Sanchez Conde, M, Sartori, P, Satalecka, K, Scalzotto, V, Scapin, V, Schweizer, T, Shayduk, M, Shinozaki, K, Shore, STEVEN NEIL, Sidro, N, Sierpowska Bartosik, A, Sillanpaa, A, Sitarek, J, Sobczynska, D, Spanier, F, Stamerra, A, Stark, Ls, Takalo, L, Tavecchio, F, Temnikov, P, Tescaro, D, Teshima, M, Tluczykont, M, Torres, Df, Turini, N, Vankov, H, Venturini, A, Vitale, V, Wagner, Rm, Wittek, W, Zabalza, V, Zandanel, F, Zanin, R, and Zapatero, J.
Published: 2009

34. Improving the performance of the single-dish Cherenkov telescope MAGIC through the use of signal timing RID B-5372-2009

Author: Aliu, E, Anderhub, H, Antonelli, La, Antoranz, P, Backes, M, Baixeras, C, Barrio, Ja, Bartko, H, Bastieri, D, Becker, Jk, Bednarek, W, Berger, K, Bernardini, E, Biland, A, Bock, Rk, Bonnoli, G, Bordas, P, Tridon, Db, Bosch Ramon, V, Bretz, T, Britvitch, I, Camara, M, Carmona, E, Chilingarian, A, Commichau, S, Contreras, Jl, Cortina, J, Costado, Mt, Covino, S, Curtef, V, Dazzi, F, De Angelis, A, del Pozo ED, de los Reyes, R, De Lotto, B, De Maria, M, De Sabata, F, Mendez, Cd, Dominguez, A, Dorner, D, Doro, M, Elsaesser, D, Errando, M, Fagiolini, M, Ferenc, D, Fernandez, E, Firpo, R, Fonseca, Mv, Font, L, Galante, N, Lopez, Rjg, Garczarczyk, M, Gaug, M, Goebel, F, Hadasch, D, Hayashida, M, Herrero, A, Hoehne, D, Hose, J, Hsu, Cc, Huber, S, Jogler, T, Kranich, D, La Barbera, A, Laille, A, Leonardo, E, Lindfors, E, Lombardi, S, Longo, F, Lopez, M, Lorenz, E, Majumdar, P, Maneva, G, Mankuzhiyil, N, Mannheim, K, Maraschi, L, Mariotti, M, Martinez, M, Mazin, D, Meucci, M, Meyer, M, Miranda, Jm, Mirzoyan, R, Moles, M, Moralejo, A, Nieto, D, Nilsson, K, Ninkovic, J, Otte, N, Oya, I, Paoletti, R, Paredes, Jm, Pasanen, M, Pascoli, D, Pauss, F, Pegna, Rg, Perez Torres MA, Persic, M, Peruzzo, L, Piccioli, A, Prada, F, Prandini, E, Puchadesa, N, Raymers, A, Rhode, W, Ribo, M, Rico, J, Rissi, M, Robert, A, Ruegamer, S, Saggion, A, Saito, Ty, Salvati, M, Sanchez Conde, M, Sartori, P, Satalecka, K, Scalzotto, V, Scapin, V, Schweizer, T, Shayduk, M, Shinozaki, K, Shore, STEVEN NEIL, Sidro, N, Sierpowska Bartosik, A, Sillanpaeae, A, Sitarek, J, Sobczynska, D, Spanier, F, Stamerra, A, Stark, Ls, Takalo, L, Tavecchio, F, Temnikov, P, Tescaro, D, Teshima, M, Tluczykont, M, Torres, Df, Turini, N, Vankov, H, Venturini, A, Vitale, V, Wagner, Rm, Wittek, W, Zabalza, V, Zandanel, F, Zanin, R, and Zapatero, J.
Published: 2009

35. Probing quantum gravity using photons from a flare of the active galactic nucleus Markarian 501 observed by the MAGIC telescope

Author: MAGIC, Collaboration, Albert, J., Aliu, E., Anderhub, H., Antonelli, L.-A., Antoranz, P., Backes, M., Baixeras, C., Barrio, J.-A., Bartko, H., Bastieri, D., Becker, J.-K., Bednarek, W., Berger, K., Bernardini, E., Bigongiari, C., Biland, A., Bock, R.-K., Bonnoli, G., Bordas, P., Bosch-Ramon, V., Bretz, Thomas Günther, Britvitch, I., Camara, M., Carmona, E., Chilingarian, A., Commichau, S., Contreras, J.-L., Cortina, J., Costado, M.-T., Covino, S., Curtef, V., Dazzi, F., De Angelis, A., De Cea Del Pozo, E., Delgado Mendez, C., De Los Reyes, R., De Lotto, B., De Maria, M., De Sabata, F., Dominguez, A., Dorner, D., Doro, M., Errando, M., Fagiolini, M., Ferenc, D., Fern'andez, E., Firpo, R., Fonseca, M.-V., Font, L., Galante, N., Garc'ia L'opez, R.-J., Garczarczyk, M., Gaug, M., Goebel, F., Hayashida, M., Herrero, A., Höhne, D., Hose, J., Hsu, C.-C., Huber, S., Jogler, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., L'opez, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Mart'inez, M., Mazin, D., Meucci, M., Meyer, M., Miranda, J.-M., Mirzoyan, R., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Otte, N., Oya, I., Panniello, M., Paoletti, R., Paredes, J.-M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R.-G., Perez-Torres, M.-A., Persic, M., Peruzzo, L., Piccioli, A., Prada, F., Prandini, E., Puchades, N., Raymers, A., Rhode, W., Rib'o, M., Rico, J., Rissi, M., Robert, A., Rügamer, S., Saggion, A., Saito, T.-Y., Salvati, M., Sanchez-Conde, M., Sartori, P., Satalecka, K., Scalzotto, V., Scapin, V., Schmitt, R., Schweizer, T., Shayduk, M., Shinozaki, K., Sidro, N., Sierpowska-Bartosik, A., Sillanpää, A., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L.-S., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Tluczykont, M., Torres, D.-F., Turini, N., Vankov, H., Venturini, A., Vitale, V., Wagner, R.-M., Wittek, W., Zabalza, V., Zandanel, F., Zanin, R., Zapatero, J., Ellis, J., Mavromatos, N.-E., Nanopoulos, D.-V., Sakharov, A.-S., Sarkisyan, E.-K.-G., Polish Academy of Sciences, European Commission, ETH Zurich, and Universitat de Barcelona
Subjects: High Energy Physics - Theory, Special relativity, Photon, Astrophysics, 01 natural sciences, General Relativity and Quantum Cosmology, law.invention, High Energy Physics - Phenomenology (hep-ph), law, Gamma ray astronomy, gamma-ray, MAGIC (telescope), 010303 astronomy & astrophysics, Boson, Physics, Mkn 501), Active galactic nuclei, Quantum gravity, Supersymmetric models, Particle acceleration [Gamma-ray sources (Individual], Astrophysics (astro-ph), gamma-ray bursts, Gamma ray, Fotons, High Energy Physics - Phenomenology, Electrónica, Física nuclear, Electricidad, Telescopis espacials, Mkn 501) [Gamma-ray sources (Individual], Flare, Astrophysics and Astronomy, Nuclear and High Energy Physics, Active galactic nucleus, Astrophysics::High Energy Astrophysical Phenomena, Particle acceleration, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Space telescopes, 0103 physical sciences, Gamma-ray sources (Individual: Mkn 501), Astronomia de raigs gamma, ddc:530, Nucli galàctic actiu, Blazar, gamma-ray sources, Photons, 010308 nuclear & particles physics, Supersimetria, High Energy Physics - Theory (hep-th), Gravetat quàntica, High Energy Physics::Experiment, Supersymmetry, Gamma-ray burst
Abstract: We analyze the timing of photons observed by the MAGIC telescope during a flare of the active galactic nucleus Mkn 501 for a possible correlation with energy, as suggested by some models of quantum gravity (QG), which predict a vacuum refractive index ≃ 1 + (E / MQGn)n, n = 1, 2. Parametrizing the delay between γ-rays of different energies as Δ t = ± τl E or Δ t = ± τq E2, we find τl = (0.030 ± 0.012) s / GeV at the 2.5-σ level, and τq = (3.71 ± 2.57) × 10-6 s / GeV2, respectively. We use these results to establish lower limits MQG 1 > 0.21 × 1018 GeV and MQG 2 > 0.26 × 1011 GeV at the 95% C.L. Monte Carlo studies confirm the MAGIC sensitivity to propagation effects at these levels. Thermal plasma effects in the source are negligible, but we cannot exclude the importance of some other source effect., Physics Letters B, 668 (4), ISSN:0370-2693, ISSN:0031-9163, ISSN:1873-2445
Published: 2008

36. Magic observations of the unidentified gamma-ray source TEV J2032+4130 RID B-5372-2009

Author: Albert, J, Aliu, E, Anderhub, H, Antoranz, P, Baixeras, C, Barrio, Ja, Bartko, H, Bastieri, D, Becker, Jk, Bednarek, W, Berger, K, Bigongiari, C, Biland, A, Bock, Rk, Bonnoli, G, Bordas, P, Bosch Ramon, V, Bretz, T, Britvitch, I, Camara, M, Carmona, E, Chilingarian, A, Commichau, S, Contreras, Jl, Cortina, J, Costado, Mt, Curtef, V, Dazzi, F, De Angelis, A, Delgado, C, de los Reyes, R, Domingo Santamaria, E, De Lotto, B, De Maria, M, De Sabata, F, Dorner, D, Doro, M, Errando, M, Fagiolini, M, Ferenc, D, Fernandez, E, Firpo, R, Fonseca, Mv, Font, L, Galante, N, Garcia Lopez RJ, Garczarczyk, M, Gaug, M, Goebel, F, Hayashida, M, Herrero, A, Hohne, D, Hose, J, Hsu, Cc, Huber, S, Jogler, T, Kosyra, R, Kranich, D, Laille, A, Leonardo, E, Lindfors, E, Lombardi, S, Longo, F, Lopez, M, Lorenz, E, Majumdar, P, Maneva, G, Mankuzhiyil, N, Mannheim, K, Mariotti, M, Martinez, M, Mazin, D, Merck, C, Meucci, M, Meyer, M, Miranda, Jm, Mirzoyan, R, Mizobuchi, S, Moralejo, A, Nieto, D, Nilsson, K, Ninkovic, J, Ona Wilhelmi, E, Otte, N, Oya, I, Panniello, M, Paoletti, R, Paredes, Jm, Pasanen, M, Pascoli, D, Pauss, F, Pegna, R, Persic, M, Peruzzo, L, Piccioli, A, Prandini, E, Puchades, N, Raymers, A, Rhode, W, Ribo, M, Rico, J, Rissi, M, Robert, A, Rugamer, S, Saggion, A, Saito, Ty, Sanchez, A, Sartori, P, Scalzotto, V, Scapin, V, Schmitt, R, Schweizer, T, Shayduk, M, Shinozaki, K, Shore, STEVEN NEIL, Sidro, N, Sillanpaa, A, Sobczynska, D, Spanier, F, Stamerra, A, Stark, Ls, Takalo, L, Temnikov, P, Tescaro, D, Teshima, M, Torres, Df, Turini, N, Vankov, H, Venturini, A, Vitale, V, Wagner, Rm, Wittek, W, Zandanel, F, Zanin, R, and Zapatero, J.
Published: 2008

37. FIRST BOUNDS ON THE HIGH-ENERGY EMISSION FROM ISOLATED WOLF-RAYET BINARY SYSTEMS RID B-5372-2009

Author: Aliu, E, Anderhub, H, Antonelli, La, Antoranz, P, Backes, M, Baixeras, C, Barrio, Ja, Bartko, H, Bastieri, D, Becker, Jk, Bednarek, W, Berger, K, Bernardini, E, Bigongiari, C, Biland, A, Bock, Rk, Bonnoli, G, Bordas, P, Bosch Ramon, V, Bretz, T, Britvitch, I, Camara, M, Carmona, E, Chilingarian, A, Commichau, S, Contreras, Jl, Cortina, J, Costado, Mt, Covino, S, Curtef, V, Dazzi, F, De Angelis, A, del Pozo ED, Reyes, Rd, De Lotto, B, De Maria, M, De Sabata, F, Mendez, Cd, Dominguez, A, Dorner, D, Doro, M, Errando, M, Fagiolini, M, Ferenc, D, Fernandez, E, Firpo, R, Fonseca, Mv, Font, L, Galante, N, Lopez, Rjg, Garczarczyk, M, Gaug, M, Goebel, F, Hayashida, M, Herrero, A, Hohne, D, Hose, J, Hsu, Cc, Huber, S, Jogler, T, Kranich, D, La Barbera, A, Laille, A, Leonardo, E, Lindfors, E, Lombardi, S, Longo, F, Lopez, M, Lorenz, E, Majumdar, P, Maneva, G, Mankuzhiyil, N, Mannheim, K, Maraschi, L, Mariotti, M, Martinez, M, Mazin, D, Meucci, M, Meyer, M, Miranda, Jm, Mirzoyan, R, Moles, M, Moralejo, A, Nieto, D, Nilsson, K, Ninkovic, J, Ona Wilhelmi, E, Otte, N, Oya, I, Paoletti, R, Paredes, Jm, Pasanen, M, Pascoli, D, Pauss, F, Pegna, Rg, Perez Torres MA, Persic, M, Peruzzo, L, Piccioli, A, Prada, F, Prandini, E, Puchades, N, Raymers, A, Rhode, W, Ribo, M, Rico, J, Rissi, M, Robert, A, Rugamer, S, Saggion, A, Saito, Ty, Salvati, M, Sanchez Conde, M, Sartori, P, Satalecka, K, Scalzotto, V, Scapin, V, Schweizer, T, Shayduk, M, Shinozaki, K, Shore, STEVEN NEIL, Sidro, N, Sierpowska Bartosik, A, Sillanpaa, A, Sobczynska, D, Spanier, F, Stamerra, A, Stark, Ls, Takalo, L, Tavecchio, F, Temnikov, P, Tescaro, D, Teshima, M, Tluczykont, M, Torres, Df, Turini, N, Vankov, H, Venturini, A, Vitale, V, Wagner, Rm, Wittek, W, Zabalza, V, Zandanel, F, Zanin, R, and Zapatero, J.
Published: 2008

38. Upper limit for gamma-ray emission above 140 GeV from the dwarf spheroidal galaxy Draco RID B-5372-2009

Author: Albert, J, Aliu, E, Anderhub, H, Antoranz, P, Backes, M, Baixeras, C, Barrio, Ja, Bartko, H, Bastieri, D, Becker, Jk, Bednarek, W, Berger, K, Bigongiari, C, Biland, A, Bock, Rk, Bordas, P, Bosch Ramon, V, Bretz, T, Britvitch, I, Camara, M, Carmona, E, Chilingarian, A, Commichau, S, Contreras, Jl, Cortina, J, Costado, Mt, Curtef, V, Danielyan, V, Dazzi, F, De Angelis, A, Delgado, C, de los Reyes, R, De Lotto, B, De Maria, M, De Sabata, F, Dorner, D, Doro, M, Errando, M, Fagiolini, M, Ferenc, D, Fernandez, E, Firpo, R, Fonseca, Mv, Font, L, Fuchs, M, Galante, N, Garcia Lopez RJ, Garczarczyk, M, Gaug, M, Goebel, F, Hakobyan, D, Hayashida, M, Hengstebeck, T, Herrero, A, Hohne, D, Hose, J, Huber, S, Hsu, Cc, Jacon, P, Jogler, T, Kosyra, R, Kranich, D, Laille, A, Lindfors, E, Lombardi, S, Longo, F, Lopez, M, Lorenz, E, Majumdar, P, Maneva, G, Mankuzhiyil, N, Mannheim, K, Mariotti, M, Martinez, M, Mazin, D, Merck, C, Meucci, M, Meyer, M, Miranda, Jm, Mirzoyan, R, Mizobuchi, S, Moles, M, Moralejo, A, Nieto, D, Nilsson, K, Ninkovic, J, Ona Wilhelmi, E, Otte, N, Oya, I, Panniello, M, Paoletti, R, Paredes, Jm, Pasanen, M, Pascoli, D, Pauss, F, Pegna, R, Perez Torres MA, Persic, M, Peruzzo, L, Piccioli, A, Prada, F, Prandini, E, Puchades, N, Raymers, A, Rhode, W, Ribo, M, Rico, J, Rissi, M, Robert, A, Rugamer, S, Saggion, A, Saito, Ty, Sanchez, A, Sanchez Conde, M, Sartori, P, Scalzotto, V, Scapin, V, Schmitt, R, Schweizer, T, Shayduk, M, Shinozaki, K, Shore, STEVEN NEIL, Sidro, N, Sillanpaa, A, Sobczynska, D, Spanier, F, Stamerra, A, Stark, Ls, Takalo, L, Temnikov, P, Tescaro, D, Teshima, M, Torres, Df, Turini, N, Vankov, H, Venturini, A, Vitale, V, Wagner, Rm, Wittek, W, Zandanel, F, Zanin, R, and Zapatero, J.
Published: 2008

39. VERY HIGH ENERGY GAMMA-RAY OBSERVATIONS OF STRONG FLARING ACTIVITY IN M87 IN 2008 FEBRUARY RID B-5372-2009

Author: Albert, J, Aliu, E, Anderhub, H, Antonelli, La, Antoranz, P, Backes, M, Baixeras, C, Barrio, Ja, Bartko, H, Bastieri, D, Becker, Jk, Bednarek, W, Berger, K, Bernardini, E, Bigongiari, C, Biland, A, Bock, Rk, Bonnoli, G, Bordas, P, Bosch Ramon, V, Bretz, T, Britvitch, I, Camara, M, Carmona, E, Chilingarian, A, Commichau, S, Contreras, Jl, Cortina, J, Costado, Mt, Covino, S, Curtef, V, Dazzi, F, De Angelis, A, del Pozo ED, Reyes, Rdl, De Lotto, B, De Maria, M, De Sabata, F, Mendez, Cd, Dominguez, A, Dorner, D, Doro, M, Errando, M, Fagiolini, M, Ferenc, D, Fernandez, E, Firpo, R, Fonseca, Mv, Font, L, Galante, N, Lopez, Rjg, Garczarczyk, M, Gaug, M, Goebel, F, Hayashida, M, Herrero, A, Hohne, D, Hose, J, Hsu, Cc, Huber, S, Jogler, T, Kranich, D, La Barbera, A, Laille, A, Leonardo, E, Lindfors, E, Lombardi, S, Longo, F, Lopez, M, Lorenz, E, Majumdar, P, Maneva, G, Mankuzhiyil, N, Mannheim, K, Maraschi, L, Mariotti, M, Martinez, M, Mazin, D, Meucci, M, Meyer, M, Miranda, Jm, Mirzoyan, R, Mizobuchi, S, Moles, M, Moralejo, A, Nieto, D, Nilsson, K, Ninkovic, J, Otte, N, Oya, I, Panniello, M, Paoletti, R, Paredes, Jm, Pasanen, M, Pascoli, D, Pauss, F, Pegna, Rg, Perez Torres MA, Persic, M, Peruzzo, L, Piccioli, A, Prada, F, Prandini, E, Puchades, N, Raymers, A, Rhode, W, Ribo, M, Rico, J, Rissi, M, Robert, A, Rugamer, S, Saggion, A, Saito, Ty, Salvati, M, Sanchez Conde, M, Sartori, P, Satalecka, K, Scalzotto, V, Scapin, V, Schweizer, T, Shayduk, M, Shinozaki, K, Shore, STEVEN NEIL, Sidro, N, Sierpowska Bartosik, A, Sillanpaa, A, Sobczynska, D, Spanier, F, Stamerra, A, Stark, Ls, Takalo, L, Tavecchio, F, Temnikov, P, Tescaro, D, Teshima, M, Tluczykont, M, Torres, Df, Turini, N, Vankov, H, Venturini, A, Vitale, V, Wagner, Rm, Wittek, W, Zabalza, V, Zandanel, F, Zanin, R, and Zapatero, J.
Published: 2008

40. Multiwavelength (Radio, X-ray, and gamma-ray) observations of the gamma-ray binary LS I +61 303 RID B-5372-2009

Author: Albert, J, Aliu, E, Anderhub, H, Antoranz, P, Backes, M, Baixeras, C, Barrio, Ja, Bartko, H, Bastieri, D, Becker, Jk, Bednarek, W, Berger, K, Bigongiari, C, Biland, A, Bock, Rk, Bonnoli, G, Bordas, P, Bosch Ramon, V, Bretz, T, Britvitch, I, Camara, M, Carmona, E, Chilingarian, A, Commichau, S, Contreras, Jl, Cortina, J, Costado, Mt, Curtef, V, Dazzi, F, De Angelis, A, de los Reyes, R, De Lotto, B, De Maria, M, De Sabata, F, Mendez, Cd, Dorner, D, Doro, M, Errando, M, Fagiolini, M, Ferenc, D, Fernandez, E, Firpo, R, Fonseca, Mv, Font, L, Galante, N, Lopez, Rjg, Garczarczyk, M, Gaug, M, Goebel, F, Hayashida, M, Herrero, A, Hohne, D, Hose, J, Hsu, Cc, Huber, S, Jogler, T, Kosyra, R, Kranich, D, Laille, A, Leonardo, E, Lindfors, E, Lombardi, S, Longo, F, Lopez, M, Lorenz, E, Majumdar, P, Maneva, G, Mankuzhiyil, N, Mannheim, K, Mariotti, M, Martinez, M, Mazin, D, Merck, C, Meucci, M, Meyer, M, Miranda, Jm, Mirzoyan, R, Mizobuchi, S, Moles, M, Moralejo, A, Nieto, D, Nilsson, K, Ninkovic, J, Ona Wilhelmi, E, Otte, N, Oya, I, Panniello, M, Paoletti, R, Paredes, Jm, Pasanen, M, Pascoli, D, Pauss, F, Pegna, Rg, Perez Torres MA, Persic, M, Peruzzo, L, Piccioli, A, Prada, F, Prandini, E, Puchades, N, Raymers, A, Rhode, W, Ribo, M, Rico, J, Rissi, M, Robert, A, Rugamer, S, Saggion, A, Saito, Ty, Sanchez, A, Sanchez Conde MA, Sartori, P, Scalzotto, V, Scapin, V, Schmitt, R, Schweizer, T, Shayduk, M, Shinozaki, K, Shore, STEVEN NEIL, Sidro, N, Sillanpaa, A, Sobczynska, D, Spanier, F, Stamerra, A, Stark, Ls, Takalo, L, Temnikov, P, Tescaro, D, Teshima, M, Torres, Df, Turini, N, Vankov, H, Venturini, A, Vitale, V, Wagner, Rm, Wittek, W, Zandanel, F, Zanin, R, Zapatero, J, Guerrero, Ma, Alberdi, A, Paragi, Z, Muxlow, Twb, and Diamond, P.
Published: 2008

41. First bounds on the high-energy emission from isolated Wolf-Rayet binary systems

Author: Aliu, E., Anderhub, H., Antonelli, L.A., Antoranz, P., Backes, M., Baixeras, C., Barrio, J.A., Bartko, H., Bastieri, D., K. Becker, J., Bednarek, W., Berger, K., Bernardini, E., Bigongiari, C., Biland, A., K. Bock, R., Bonnoli, G., Bordas, P., Bosch-Ramon, V., Bretz, T., Britvitch, I., Camara, M., Carmona, E., Chilingarian, A., Commichau, S., L. Contreras, J., Cortina, J., T. Costado, M., Covino, S., Curtef, V., Dazzi, F., De Angelis, A., De Ceadel Pozo, E., De Los Reyes, R., De Lotto, B., De Maria, M., De Sabata, F., Delgado Mendez, C., Dominguez, A., Dorner, D., Doro, M., Errando, M., Fagiolini, M., Ferenc, D., Fernández, E., Firpo, R., V. Fonseca, M., Font, L., Galante, N., J. García López, R., Garczarczyk, M., Gaug, M., Goebel, F., Hayashida, M., Herrero, A., Höhne, D., Hose, J., C. Hsu, C., Huber, S., Jogler, T., M. Kneiske, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Meyer, M., M. Miranda, J., Mirzoyan, R., Mizobuchi, S., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., De Oña Wilhelmi, E., Otte, N., Oya, I., Panniello, M., Paoletti, R., M. Paredes, J., Pasanen, M., Pascoli, D., Pauss, F., G. Pegna, R., A. Perez-Torres, M., Persic, M., Peruzzo, L., Piccioli, A., Prada, F., Prandini, E., Puchades, N., Raymers, A., Rhode, W., Ribó, M., Rico, J., Rissi, M., Robert, A., Rügamer, S., Saggion, A., Y. Saito, T., Salvati, M., Sanchez-Conde, M., Sartori, P., Satalecka, K., Scalzotto, V., Scapin, V., Schmitt, R., Schweizer, T., Shayduk, M., Shinozaki, K., N. Shore, S., Sidro, N., Sierpowska-Bartosik, A., Sillanpää, A., Sobczynska, D., Spanier, F., Stamerra, A., S. Stark, L., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Tluczykont, M., F. Torres, D., Turini, N., Vankov, H., Venturini, A., Vitale, V., M. Wagner, R., Wittek, W., Zabalza, V., Zandanel, F., Zanin, R., Zapatero, J., APC - Astrophysique des Hautes Energies (APC - AHE), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Dipartimento di Astronomia, Universita degli Studi di Bologna, Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO)-Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Universitat de Barcelona, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Dipartimento di Astronomia, Universita degli Studi di Bologna, Università di Bologna [Bologna] (UNIBO)-Università di Bologna [Bologna] (UNIBO), E., Aliu, H., Anderhub, L. A., Antonelli, P., Antoranz, M., Backe, C., Baixera, J. A., Barrio, H., Bartko, D., Bastieri, J. K., Becker, W., Bednarek, K., Berger, E., Bernardini, C., Bigongiari, A., Biland, R. K., Bock, G., Bonnoli, P., Borda, V., Bosch Ramon, T., Bretz, I., Britvitch, M., Camara, E., Carmona, A., Chilingarian, S., Commichau, J. L., Contrera, J., Cortina, M. T., Costado, S., Covino, V., Curtef, F., Dazzi, A. D., Angeli, E. D., del Pozo, R. D., Reye, B. D., Lotto, M. D., Maria, F. D., Sabata, C. D., Mendez, A., Dominguez, D., Dorner, M., Doro, M., Errando, M., Fagiolini, D., Ferenc, E., Fernandez, R., Firpo, M. V., Fonseca, L., Font, N., Galante, R. J. G., Lopez, M., Garczarczyk, M., Gaug, F., Goebel, M., Hayashida, A., Herrero, D., Hohne, J., Hose, C. C., Hsu, S., Huber, T., Jogler, D., Kranich, A. L., Barbera, A., Laille, E., Leonardo, E., Lindfor, S., Lombardi, Longo, Francesco, M., Lopez, E., Lorenz, P., Majumdar, G., Maneva, N., Mankuzhiyil, K., Mannheim, L., Maraschi, M., Mariotti, M., Martinez, D., Mazin, M., Meucci, M., Meyer, J. M., Miranda, R., Mirzoyan, M., Mole, A., Moralejo, D., Nieto, K., Nilsson, J., Ninkovic, E., Ona Wilhelmi, N., Otte, I., Oya, R., Paoletti, J. M., Parede, M., Pasanen, D., Pascoli, F., Pau, R. G., Pegna, M. A., Perez Torre, M., Persic, L., Peruzzo, A., Piccioli, F., Prada, E., Prandini, N., Puchade, A., Raymer, W., Rhode, M., Ribo, J., Rico, M., Rissi, A., Robert, S., Rugamer, A., Saggion, T. Y., Saito, M., Salvati, M., Sanchez Conde, P., Sartori, K., Satalecka, V., Scalzotto, V., Scapin, T., Schweizer, M., Shayduk, K., Shinozaki, S. N., Shore, N., Sidro, A., Sierpowska Bartosik, A., Sillanpaa, D., Sobczynska, F., Spanier, A., Stamerra, L. S., Stark, L., Takalo, F., Tavecchio, P., Temnikov, D., Tescaro, M., Teshima, M., Tluczykont, D. F., Torre, N., Turini, H., Vankov, A., Venturini, V., Vitale, R. M., Wagner, W., Wittek, V., Zabalza, F., Zandanel, R., Zanin, and J., Zapatero
Subjects: High energy, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], High velocity, Astrophysics::High Energy Astrophysical Phenomena, Binary number, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Star (graph theory), 01 natural sciences, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Wolf–Rayet star, Raigs gamma, Observacions astronòmiques, 0103 physical sciences, Binary star, Astrophysics::Solar and Stellar Astrophysics, WR star binarie, 010303 astronomy & astrophysics, Cosmic rays, Astrophysics::Galaxy Astrophysics, WR star binaries, Physics, Very High Energy Gamma-ray Astronomy, MAGIC telescope, 010308 nuclear & particles physics, gamma ray astronomy, IMAGING CHERENKOV DETECTOR, Astrophysics (astro-ph), Gamma rays, Astronomy and Astrophysics, gamma rays, observations, Space and Planetary Science, High mass, ddc:520, Electrónica, Física nuclear, Electricidad, gamma rays: observations, Astronomical observations
Abstract: High-energy gamma-ray emission is theoretically expected to arise in tight binary star systems (with high mass loss and high velocity winds), although the evidence of this relationship has proven to be elusive so far. Here we present the first bounds on this putative emission from isolated Wolf-Rayet (WR) star binaries, WR 147 and WR 146, obtained from observations with the MAGIC telescope., (Authors are the MAGIC Collaboration.) Manuscript in press at The Astrophysical Journal Letters
Published: 2008

42. Insights into the high-energy gamma-ray emission of markarian 501 from extensive multifrequency observations in the Fermi era

Author: Abdo, A. A., Ackermann, M., Ajello, M., Allafort, A., Baldini, L., Ballet, J., Barbiellini, G., Baring, M. G., Bastieri, D., Bechtol, K., Bellazzini, R., Berenji, B., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bouvier, A., Brandt, T. J., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Cannon, A., Caraveo, P. A., Carrigan, S., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Celik, O., Charles, E., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cutini, S., Dermer, C. D., de Palma, F., Silva, E. D. E., Drell, P. S., Dubois, R., Dumora, D., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Focke, W. B., Fortin, P., Frailis, M., Fuhrmann, L., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Guillemot, L., Guiriec, S., Hayashida, M., Hays, E., Horan, D., Hughes, R. E., Johannesson, G., Johnson, A. S., Johnson, W. N., Kadler, M., Kamae, T., Katagiri, H., Kataoka, J., Knodlseder, J., Kuss, M., Lande, J., Latronico, L., Lee, S. H., Lemoine-Goumard, M., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Max-Moerbeck, W., Mazziotta, M. N., McEnery, J. E., Mehault, J., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann-Godo, M., Nishino, S., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pavlidou, V., Pearson, T. J., Pelassa, V., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Raino, S., Rando, R., Razzano, M., Readhead, A., Reimer, A., Reimer, O., Richards, J. L., Ripken, J., Ritz, S., Roth, M., Sadrozinski, H. F. W., Sanchez, D., Sander, A., Scargle, J. D., Sgro, C., Siskind, E. J., Smith, P. D., Spandre, G., Spinelli, P., Stawarz, L., Stevenson, M., Strickman, M. S., Sokolovsky, K. V., Suson, D. J., Takahashi, H., Takahashi, T., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Torres, F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vilchez, N., Vitale, V., Waite, A. P., Wang, P., Wehrle, A. E., Winer, B. L., Wood, K. S., Yang, Z., Ylinen, T., Zensus, J. A., Ziegler, M., Aleksic, J., Antonelli, L. A., Antoranz, P., Backes, M., Barrio, J. A., Gonzalez, J. B., Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Bordas, P., Tridon, D. B., Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Camara, M., Carmona, E., Carosi, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Dazzi, F., de Angelis, A., del Pozo, E. D., De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. D., Ortega, A. D., Doert, M., Dominguez, A., Prester, D. D., Dorner, D., Doro, M., Elsaesser, D., Ferenc, D., Fonseca, M. V., Font, L., Lopen, R. J. G., Garczarczyk, M., Gaug, M., Giavitto, G., Godinovi, N., Hadasch, D., Herrero, A., Hildebrand, D., Hohne-Monch, D., Hose, J., Hrupec, D., Jogler, T., Klepser, S., Krahenbuhl, T., Kranich, D., Krause, J., La Barbera, A., Leonardo, E., Lindfors, E., Lombardi, S., Lopez, M., Lorenz, E., Majumdar, P., Makariev, E., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldon, J., Moralejo, A., Nieto, D., Nilsson, K., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, J., Pochon, J., Moroni, P. G. P., Prada, F., Prandini, E., Puchades, N., Puljak, I., Reichardt, T., Reinthal, R., Rhode, W., Ribo, M., Rico, J., Rissi, M., Rugamer, S., Saggion, A., Saito, K., Saito, T. Y., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpaa, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Storz, J., Strah, N., Struebig, J. C., Suric, T., Takalo, L. O., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Vankov, H., Wagner, R. M., Weitzel, Q., Zabalza, V., Zandanel, F., Zanin, R., Acciari, V. A., Arlen, T., Aune, T., Benbow, W., Boltuch, D., Bradbury, S. M., Buckley, J. H., Bugaev, V., Cesarini, A., Ciupik, L., Cui, W., Dickherber, R., Errando, M., Falcone, A., Finley, J. P., Finnegan, G., Fortson, L., Furniss, A., Galante, N., Gall, D., Gillanders, G. H., Godambe, S., Grube, J., Guenette, R., Gyuk, G., Hanna, D., Holder, J., Huang, D., Hui, C. M., Humensky, T. B., Kaaret, P., Karlsson, N., Kertzman, M., Kieda, D., Konopelko, A., Krawczynski, H., Krennrich, F., Lang, M. J., Maier, G., McArthur, S., McCann, A., McCutcheon, M., Moriarty, P., Mukherjee, R., Ong, R., Otte, N., Pandel, D., Perkins, J. S., Pichel, A., Pohl, M., Quinn, J., Ragan, K., Reyes, L. C., Reynolds, P. T., Roache, E., Rose, H. J., Rovero, A. C., Schroedter, M., Sembroski, G. H., Senturk, G. D., Steele, D., Swordy, S. P., Tesic, G., Theiling, M., Thibadeau, S., Varlotta, A., Vincent, S., Wakely, S. P., Ward, J. E., Weekes, T. C., Weinstein, A., Weisgarber, T., Williams, D. A., Wood, M., Zitzer, B., Villata, M., Raiteri, C. M., Aller, H. D., Aller, M. F., Arkharov, A. A., Blinov, D. A., Calcidese, P., Chen, W. P., Efimova, N. V., Kimeridze, G., Konstantinova, T. S., Kopatskaya, E. N., Koptelova, E., Kurtanidze, O. M., Kurtanidze, S. O., Lahteenmaki, A., Larionov, V. M., Larionova, E. G., Larionova, L. V., Ligustri, R., Morozova, D. A., Nikolashvili, M. G., Sigua, L. A., Troitsky, I. S., Angelakis, E., Capalbi, M., Carraminana, A., Carrasco, L., Cassaro, P., de la Fuente, E., Gurwell, M. A., Kovalev, Y. Y., Kovalev, Y. A., Krichbaum, T. P., Krimm, H. A., Leto, P., Lister, M. L., Maccaferri, G., Moody, J. W., Mori, Y., Nestoras, I., Orlati, A., Pagani, C., Pace, C., Pearson, R., Perri, M., Piner, B. G., Pushkarev, A. B., Ros, E., Sadun, A. C., Sakamoto, T., Tornikoski, M., Yatsu, Y., Zook, A., Fermi, L. A. T. Collaboration Magic Collaboration Veritas Collaboration, Abdo, A. A., Ackermann, M., Ajello, M., Allafort, A., Baldini, L., Ballet, J., Barbiellini, G., Baring, M. G., Bastieri, D., Bechtol, K., Bellazzini, R., Berenji, B., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bouvier, A., Brandt, T. J., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Cannon, A., Caraveo, P. A., Carrigan, S., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Celik, O., Charles, E., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cutini, S., Dermer, C. D., de Palma, F., Silva, E. D. E., Drell, P. S., Dubois, R., Dumora, D., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Focke, W. B., Fortin, P., Frailis, M., Fuhrmann, L., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Guillemot, L., Guiriec, S., Hayashida, M., Hays, E., Horan, D., Hughes, R. E., Johannesson, G., Johnson, A. S., Johnson, W. N., Kadler, M., Kamae, T., Katagiri, H., Kataoka, J., Knodlseder, J., Kuss, M., Lande, J., Latronico, L., Lee, S. H., Lemoine-Goumard, M., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Max-Moerbeck, W., Mazziotta, M. N., McEnery, J. E., Mehault, J., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann-Godo, M., Nishino, S., Nolan, P. L., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pavlidou, V., Pearson, T. J., Pelassa, V., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Raino, S., Rando, R., Razzano, M., Readhead, A., Reimer, A., Reimer, O., Richards, J. L., Ripken, J., Ritz, S., Roth, M., Sadrozinski, H. F. W., Sanchez, D., Sander, A., Scargle, J. D., Sgro, C., Siskind, E. J., Smith, P. D., Spandre, G., Spinelli, P., Stawarz, L., Stevenson, M., Strickman, M. S., Sokolovsky, K. V., Suson, D. J., Takahashi, H., Takahashi, T., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Torres, F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vilchez, N., Vitale, V., Waite, A. P., Wang, P., Wehrle, A. E., Winer, B. L., Wood, K. S., Yang, Z., Ylinen, T., Zensus, J. A., Ziegler, M., Aleksic, J., Antonelli, L. A., Antoranz, P., Backes, M., Barrio, J. A., Gonzalez, J. B., Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Bordas, P., Tridon, D. B., Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Camara, M., Carmona, E., Carosi, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Dazzi, F., de Angelis, A., del Pozo, E. D., De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. D., Ortega, A. D., Doert, M., Dominguez, A., Prester, D. D., Dorner, D., Doro, M., Elsaesser, D., Ferenc, D., Fonseca, M. V., Font, L., Lopen, R. J. G., Garczarczyk, M., Gaug, M., Giavitto, G., Godinovi, N., Hadasch, D., Herrero, A., Hildebrand, D., Hohne-Monch, D., Hose, J., Hrupec, D., Jogler, T., Klepser, S., Krahenbuhl, T., Kranich, D., Krause, J., La Barbera, A., Leonardo, E., Lindfors, E., Lombardi, S., Lopez, M., Lorenz, E., Majumdar, P., Makariev, E., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldon, J., Moralejo, A., Nieto, D., Nilsson, K., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, J., Pochon, J., Moroni, P. G. P., Prada, F., Prandini, E., Puchades, N., Puljak, I., Reichardt, T., Reinthal, R., Rhode, W., Ribo, M., Rico, J., Rissi, M., Rugamer, S., Saggion, A., Saito, K., Saito, T. Y., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpaa, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Storz, J., Strah, N., Struebig, J. C., Suric, T., Takalo, L. O., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Vankov, H., Wagner, R. M., Weitzel, Q., Zabalza, V., Zandanel, F., Zanin, R., Acciari, V. A., Arlen, T., Aune, T., Benbow, W., Boltuch, D., Bradbury, S. M., Buckley, J. H., Bugaev, V., Cesarini, A., Ciupik, L., Cui, W., Dickherber, R., Errando, M., Falcone, A., Finley, J. P., Finnegan, G., Fortson, L., Furniss, A., Galante, N., Gall, D., Gillanders, G. H., Godambe, S., Grube, J., Guenette, R., Gyuk, G., Hanna, D., Holder, J., Huang, D., Hui, C. M., Humensky, T. B., Kaaret, P., Karlsson, N., Kertzman, M., Kieda, D., Konopelko, A., Krawczynski, H., Krennrich, F., Lang, M. J., Maier, G., McArthur, S., McCann, A., McCutcheon, M., Moriarty, P., Mukherjee, R., Ong, R., Otte, N., Pandel, D., Perkins, J. S., Pichel, A., Pohl, M., Quinn, J., Ragan, K., Reyes, L. C., Reynolds, P. T., Roache, E., Rose, H. J., Rovero, A. C., Schroedter, M., Sembroski, G. H., Senturk, G. D., Steele, D., Swordy, S. P., Tesic, G., Theiling, M., Thibadeau, S., Varlotta, A., Vincent, S., Wakely, S. P., Ward, J. E., Weekes, T. C., Weinstein, A., Weisgarber, T., Williams, D. A., Wood, M., Zitzer, B., Villata, M., Raiteri, C. M., Aller, H. D., Aller, M. F., Arkharov, A. A., Blinov, D. A., Calcidese, P., Chen, W. P., Efimova, N. V., Kimeridze, G., Konstantinova, T. S., Kopatskaya, E. N., Koptelova, E., Kurtanidze, O. M., Kurtanidze, S. O., Lahteenmaki, A., Larionov, V. M., Larionova, E. G., Larionova, L. V., Ligustri, R., Morozova, D. A., Nikolashvili, M. G., Sigua, L. A., Troitsky, I. S., Angelakis, E., Capalbi, M., Carraminana, A., Carrasco, L., Cassaro, P., de la Fuente, E., Gurwell, M. A., Kovalev, Y. Y., Kovalev, Y. A., Krichbaum, T. P., Krimm, H. A., Leto, P., Lister, M. L., Maccaferri, G., Moody, J. W., Mori, Y., Nestoras, I., Orlati, A., Pagani, C., Pace, C., Pearson, R., Perri, M., Piner, B. G., Pushkarev, A. B., Ros, E., Sadun, A. C., Sakamoto, T., Tornikoski, M., Yatsu, Y., Zook, A., and Fermi, L. A. T. Collaboration Magic Collaboration Veritas Collaboration
Abstract: We report on the gamma-ray activity of the blazar Mrk 501 during the first 480 days of Fermi operation. We find that the average Large Area Telescope (LAT) gamma-ray spectrum of Mrk 501 can be well described by a single power-law function with a photon index of 1.78 +/- 0.03. While we observe relatively mild flux variations with the Fermi-LAT (within less than a factor of two), we detect remarkable spectral variability where the hardest observed spectral index within the LAT energy range is 1.52 +/- 0.14, and the softest one is 2.51 +/- 0.20. These unexpected spectral changes do not correlate with the measured flux variations above 0.3 GeV. In this paper, we also present the first results from the 4.5 month long multifrequency campaign (2009 March 15-August 1) on Mrk 501, which included the Very Long Baseline Array (VLBA), Swift, RXTE, MAGIC, and VERITAS, the F-GAMMA, GASP-WEBT, and other collaborations and instruments which provided excellent temporal and energy coverage of the source throughout the entire campaign. The extensive radio to TeV data set from this campaign provides us with the most detailed spectral energy distribution yet collected for this source during its relatively low activity. The average spectral energy distribution of Mrk 501 is well described by the standard one-zone synchrotron self-Compton (SSC) model. In the framework of this model, we find that the dominant emission region is characterized by a size less than or similar to 0.1 pc (comparable within a factor of few to the size of the partially resolved VLBA core at 15-43 GHz), and that the total jet power (similar or equal to 10(44) erg s(-1)) constitutes only a small fraction (similar to 10(-3)) of the Eddington luminosity. The energy distribution of the freshly accelerated radiating electrons required to fit the time-averaged data has a broken power-law form in the energy range 0.3 GeV-10 TeV, with spectral indices 2.2 and 2.7 below and above the break energy of 20 GeV. We argue that su
Published: 2011

43. Spectral energy distribution of markarian 501: Quiescent state versus extreme outburst

Author: Acciari, V. A., Arlen, T., Aune, T., Beilicke, M., Benbow, W., Bottcher, M., Boltuch, D., Bradbury, S. M., Buckley, J. H., Bugaev, V., Cannon, A., Cesarini, A., Ciupik, L., Cui, W., Dickherber, R., Duke, C., Errando, M., Falcone, A., Finley, J. P., Finnegan, G., Fortson, L., Furniss, A., Galante, N., Gall, D., Godambe, S., Grube, J., Guenette, R., Gyuk, G., Hanna, D., Holder, J., Huang, D., Hui, C. M., Humensky, T. B., Imran, A., Kaaret, P., Karlsson, N., Kertzman, M., Kieda, D., Konopelko, A., Krawczynski, H., Krennrich, F., Madhavan, A. S., Maier, G., McArthur, S., McCann, A., Moriarty, P., Ong, R. A., Otte, A. N., Pandel, D., Perkins, J. S., Pichel, A., Pohl, M., Quinn, J., Ragan, K., Reyes, L. C., Reynolds, P. T., Roache, E., Rose, H. J., Schroedter, M., Sembroski, G. H., Steele, D., Swordy, S. P., Theiling, M., Thibadeau, S., Varlotta, A., Vassiliev, V. V., Vincent, S., Wakely, S. P., Ward, J. E., Weekes, T. C., Weinstein, A., Weisgarber, T., Williams, D. A., Wood, M., Zitzer, B., Aleksic, J., Antonelli, L. A., Antoranz, P., Backes, M., Barrio, J. A., Bastieri, D., Gonzalez, J. B., Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Bordas, P., Tridon, D. B., Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Camara, M., Carmona, E., Carosi, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Dazzi, F., De Angelis, A., Del Pozo, E. D., De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. D., Ortega, A. D., Doert, M., Dominguez, A., Prester, D. D., Dorner, D., Doro, M., Elsaesser, D., Ferenc, D., Fonseca, M. V., Font, L., Lopez, R. J. G., Garczarczyk, M., Gaug, M., Giavitto, G., Godinovic, N., Hadasch, D., Herrero, A., Hildebrand, D., Hohne-Monch, D., Hose, J., Hrupec, D., Jogler, T., Klepser, S., Krahenbuhl, T., Kranich, D., Krause, J., La Barbera, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lorenz, E., Majumdar, P., Makariev, M., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldon, J., Moralejo, A., Nieto, D., Nilsson, K., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Pochon, J., Prada, F., Moroni, P. G. P., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Reinthal, R., Rhode, W., Ribo, M., Rico, J., Rissi, M., Rugamer, S., Saggion, A., Saito, K., Saito, T. Y., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpaa, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Storz, J., Strah, N., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Torres, D. F., Vankov, H., Wagner, R. M., Weitzel, Q., Zabalza, V., Zandanel, F., Zanin, R., Paneque, D., Hayashida, M., Acciari, V. A., Arlen, T., Aune, T., Beilicke, M., Benbow, W., Bottcher, M., Boltuch, D., Bradbury, S. M., Buckley, J. H., Bugaev, V., Cannon, A., Cesarini, A., Ciupik, L., Cui, W., Dickherber, R., Duke, C., Errando, M., Falcone, A., Finley, J. P., Finnegan, G., Fortson, L., Furniss, A., Galante, N., Gall, D., Godambe, S., Grube, J., Guenette, R., Gyuk, G., Hanna, D., Holder, J., Huang, D., Hui, C. M., Humensky, T. B., Imran, A., Kaaret, P., Karlsson, N., Kertzman, M., Kieda, D., Konopelko, A., Krawczynski, H., Krennrich, F., Madhavan, A. S., Maier, G., McArthur, S., McCann, A., Moriarty, P., Ong, R. A., Otte, A. N., Pandel, D., Perkins, J. S., Pichel, A., Pohl, M., Quinn, J., Ragan, K., Reyes, L. C., Reynolds, P. T., Roache, E., Rose, H. J., Schroedter, M., Sembroski, G. H., Steele, D., Swordy, S. P., Theiling, M., Thibadeau, S., Varlotta, A., Vassiliev, V. V., Vincent, S., Wakely, S. P., Ward, J. E., Weekes, T. C., Weinstein, A., Weisgarber, T., Williams, D. A., Wood, M., Zitzer, B., Aleksic, J., Antonelli, L. A., Antoranz, P., Backes, M., Barrio, J. A., Bastieri, D., Gonzalez, J. B., Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Bordas, P., Tridon, D. B., Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Camara, M., Carmona, E., Carosi, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Dazzi, F., De Angelis, A., Del Pozo, E. D., De Lotto, B., De Maria, M., De Sabata, F., Mendez, C. D., Ortega, A. D., Doert, M., Dominguez, A., Prester, D. D., Dorner, D., Doro, M., Elsaesser, D., Ferenc, D., Fonseca, M. V., Font, L., Lopez, R. J. G., Garczarczyk, M., Gaug, M., Giavitto, G., Godinovic, N., Hadasch, D., Herrero, A., Hildebrand, D., Hohne-Monch, D., Hose, J., Hrupec, D., Jogler, T., Klepser, S., Krahenbuhl, T., Kranich, D., Krause, J., La Barbera, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lorenz, E., Majumdar, P., Makariev, M., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldon, J., Moralejo, A., Nieto, D., Nilsson, K., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Pochon, J., Prada, F., Moroni, P. G. P., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Reinthal, R., Rhode, W., Ribo, M., Rico, J., Rissi, M., Rugamer, S., Saggion, A., Saito, K., Saito, T. Y., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpaa, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Storz, J., Strah, N., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Torres, D. F., Vankov, H., Wagner, R. M., Weitzel, Q., Zabalza, V., Zandanel, F., Zanin, R., Paneque, D., and Hayashida, M.
Abstract: The very high energy (VHE; E > 100 GeV) blazar Markarian 501 (Mrk 501) has a well-studied history of extreme spectral variability and is an excellent laboratory for studying the physical processes within the jets of active galactic nuclei. However, there are few detailed multiwavelength studies of Mrk 501 during its quiescent state, due to its low luminosity. A short-term multiwavelength study of Mrk 501 was coordinated in 2009 March, focusing around a multi-day observation with the Suzaku X-ray satellite and including gamma-ray data from VERITAS, MAGIC, and the Fermi Gamma-ray Space Telescope with the goal of providing a well-sampled multiwavelength baseline measurement of Mrk 501 in the quiescent state. The results of these quiescent-state observations are compared to the historically extreme outburst of 1997 April 16, with the goal of examining variability of the spectral energy distribution (SED) between the two states. The derived broadband SED shows the characteristic double-peaked profile. We find that the X-ray peak shifts by over two orders of magnitude in photon energy between the two flux states while the VHE peak varies little. The limited shift in the VHE peak can be explained by the transition to the Klein-Nishina (KN) regime. Synchrotron self-Compton models are matched to the data and the implied KN effects are explored.
Published: 2011

44. Gamma-ray excess from a stacked sample of high- and intermediate-frequency peaked blazars observed with the magic telescope

Author: Aleksic, J., Antonelli, L., Antoranz, P., Backes, M., Baixeras, C., Barrio, J., Bastieri, D., Becerra, J., Bednarek, W., Berduygin, A., Berger, K., Bernardini, E., Biland, A., Blanch Bigas, O., Bock, R., Bonnoli, G., Bordas, P., Borla Tridon, D., Bosch-Ramón, V., Bose, D., Braun, I., Bretz, T., Britzger, M., Cámara, M., Carmona, E., Carosi, A., Colin, P., Commichau, S., Contreras, J., Cortina, J., Costado, M., Covino, S., Dazzi, F., de Angelis, A., De Cea Del Pozo, E., de los Reyes Lopez, R., De Lotto, B., De Maria, M., De Sabata, F., Delgado, C., Doert, M., Dominguez, A., Dominis Prester, D., Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fonseca, M., Font, L., Garcia López, R., Garczarczyk, M., Gaug, M., Godinovic, N., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Hsu, C., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J., Mirzoyan, R., Miyamoto, H., Moldon, J., Moles, M., Moralejo Olaizola, A., Nieto, D., Nilsson, K., Ninkovic, J., Orito, R., Oya, I., Paiano, S., Paoletti, R., Paredes, J., Partini, S., Pasanen, M., Pascoli, D., Paüss, F., Pegna, R., Pérez-Torres, M., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Rhode, W., Ribo, M., Rico, J., Rissi, M., Rugamer, S., Saggion, A., Saito, T., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Struebig, J., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Tibolla, Omar, Torres, D., Vankov, H., Wagner, R., Weitzel, Q., Zabalza, V., Zandanel, F., Zanin, R., Aleksic, J., Antonelli, L., Antoranz, P., Backes, M., Baixeras, C., Barrio, J., Bastieri, D., Becerra, J., Bednarek, W., Berduygin, A., Berger, K., Bernardini, E., Biland, A., Blanch Bigas, O., Bock, R., Bonnoli, G., Bordas, P., Borla Tridon, D., Bosch-Ramón, V., Bose, D., Braun, I., Bretz, T., Britzger, M., Cámara, M., Carmona, E., Carosi, A., Colin, P., Commichau, S., Contreras, J., Cortina, J., Costado, M., Covino, S., Dazzi, F., de Angelis, A., De Cea Del Pozo, E., de los Reyes Lopez, R., De Lotto, B., De Maria, M., De Sabata, F., Delgado, C., Doert, M., Dominguez, A., Dominis Prester, D., Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fonseca, M., Font, L., Garcia López, R., Garczarczyk, M., Gaug, M., Godinovic, N., Hadasch, D., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hrupec, D., Hsu, C., Jogler, T., Klepser, S., Krähenbühl, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J., Mirzoyan, R., Miyamoto, H., Moldon, J., Moles, M., Moralejo Olaizola, A., Nieto, D., Nilsson, K., Ninkovic, J., Orito, R., Oya, I., Paiano, S., Paoletti, R., Paredes, J., Partini, S., Pasanen, M., Pascoli, D., Paüss, F., Pegna, R., Pérez-Torres, M., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Rhode, W., Ribo, M., Rico, J., Rissi, M., Rugamer, S., Saggion, A., Saito, T., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Struebig, J., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Tibolla, Omar, Torres, D., Vankov, H., Wagner, R., Weitzel, Q., Zabalza, V., Zandanel, F., and Zanin, R.
Published: 2011

45. DETECTION OF VERY HIGH ENERGY gamma-RAY EMISSION FROM THE PERSEUS CLUSTER HEAD-TAIL GALAXY IC 310 BY THE MAGIC TELESCOPES

Author: Aleksic, J., Antonelli, L. A., Antoranz, P., Backes, M., Barrio, J. A., Bastieri, D., Becerra Gonzalez, J., Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Camara, M., Canellas, A., Carmona, E., Carosi, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Cossio, L., Covino, S., Dazzi, F., De Angelis, A., De Cea del Pozo, E., De Lotto, B., De Maria, M., De Sabata, F., Delgado Mendez, C., Diago Ortega, A., Doert, M., Dominguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fonseca, M. V., Font, L., Garcia Lopez, R. J., Garczarczyk, M., Giavitto, G., Godinovic, N., Hadasch, D., Herrero, A., Hildebrand, D., Hoehne-Moench, D., Hose, J., Hrupec, D., Jogler, T., Klepser, S., Kraehenbuehl, T., Kranich, D., Krause, J., La Barbera, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lorenz, E., Majumdar, P., Makariev, M., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldon, J., Moralejo, A., Nieto, D., Nilsson, K., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Pochon, J., Prada, F., Moroni, P. G. Prada, Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Reinthal, R., Rhode, W., Ribo, M., Rico, J., Ruegamer, S., Saggion, A., Saito, K., Saito, T. Y., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpaa, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Storz, J., Strah, N., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Torres, D. F., Vankov, H., Wagner, R. M., Weitzel, Q., Zabalza, V., Zandanel, F., Zanin, R., Neronov, A., Pfrommer, C., Pinzke, Anders, Semikoz, D. V., Aleksic, J., Antonelli, L. A., Antoranz, P., Backes, M., Barrio, J. A., Bastieri, D., Becerra Gonzalez, J., Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Camara, M., Canellas, A., Carmona, E., Carosi, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Cossio, L., Covino, S., Dazzi, F., De Angelis, A., De Cea del Pozo, E., De Lotto, B., De Maria, M., De Sabata, F., Delgado Mendez, C., Diago Ortega, A., Doert, M., Dominguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fonseca, M. V., Font, L., Garcia Lopez, R. J., Garczarczyk, M., Giavitto, G., Godinovic, N., Hadasch, D., Herrero, A., Hildebrand, D., Hoehne-Moench, D., Hose, J., Hrupec, D., Jogler, T., Klepser, S., Kraehenbuehl, T., Kranich, D., Krause, J., La Barbera, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lorenz, E., Majumdar, P., Makariev, M., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldon, J., Moralejo, A., Nieto, D., Nilsson, K., Orito, R., Oya, I., Paoletti, R., Paredes, J. M., Partini, S., Pasanen, M., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Pochon, J., Prada, F., Moroni, P. G. Prada, Prandini, E., Puchades, N., Puljak, I., Reichardt, I., Reinthal, R., Rhode, W., Ribo, M., Rico, J., Ruegamer, S., Saggion, A., Saito, K., Saito, T. Y., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shayduk, M., Shore, S. N., Sierpowska-Bartosik, A., Sillanpaa, A., Sitarek, J., Sobczynska, D., Spanier, F., Spiro, S., Stamerra, A., Steinke, B., Storz, J., Strah, N., Struebig, J. C., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Torres, D. F., Vankov, H., Wagner, R. M., Weitzel, Q., Zabalza, V., Zandanel, F., Zanin, R., Neronov, A., Pfrommer, C., Pinzke, Anders, and Semikoz, D. V.
Abstract: We report on the detection with the MAGIC telescopes of very high energy (VHE) gamma-rays from IC 310, a head-tail radio galaxy in the Perseus galaxy cluster, observed during the interval 2008 November to 2010 February. The Fermi satellite has also detected this galaxy. The source is detected by MAGIC at a high statistical significance of 7.6 sigma in 20.6 hr of stereo data. The observed spectral energy distribution is flat with a differential spectral index of -2.00 +/- 0.14. The mean flux above 300 GeV, between 2009 October and 2010 February, (3.1 +/- 0.5) x 10(-12) cm(-2) s(-1), corresponds to (2.5 +/- 0.4)% of Crab Nebula units. Only an upper limit, of 1.9% of Crab Nebula units above 300 GeV, was obtained with the 2008 data. This, together with strong hints (>3 sigma) of flares in the middle of 2009 October and November, implies that the emission is variable. The MAGIC results favor a scenario with the VHE emission originating from the inner jet close to the central engine. More complicated models than a simple one-zone synchrotron self-Compton (SSC) scenario, e. g., multi-zone SSC, external Compton, or hadronic, may be required to explain the very flat spectrum and its extension over more than three orders of magnitude in energy., authorCount :153
Published: 2010
Full Text: View/download PDF

46. Radio Imaging of the Very-High-Energy gamma-Ray Emission Region in the Central Engine of a Radio Galaxy

Author: Acciari, V. A., Aliu, E., Arlen, T., Bautista, M., Beilicke, M., Benbow, W., Bradbury, S. M., Buckley, J. H., Bugaev, V., Butt, Y., Byrum, K., Cannon, A., Celik, O., Cesarini, A., Chow, Y. C., Ciupik, L., Cogan, P., Cui, W., Dickherber, R., Fegan, S. J., Finley, J. P., Fortin, P., Fortson, L., Furniss, A., Gall, D., Gillanders, G. H., Grube, J., Guenette, R., Gyuk, G., Hanna, D., Holder, J., Horan, D., Hui, C. M., Humensky, T. B., Imran, A., Kaaret, P., Karlsson, N., Kieda, D., Kildea, J., Konopelko, A., Krawczynski, H., Krennrich, F., Lang, M. J., LeBohec, S., Maier, G., McCann, A., McCutcheon, M., Millis, J., Moriarty, P., Ong, R. A., Otte, A. N., Pandel, D., Perkins, J. S., Petry, D., Pohl, M., Quinn, J., Ragan, K., Reyes, L. C., Reynolds, P. T., Roache, E., Rose, H. J., Schroedter, M., Sembroski, G. H., Smith, A. W., Swordy, S. P., Theiling, M., Toner, J. A., Varlotta, A., Vincent, S., Wakely, S. P., Ward, J. E., Weekes, T. C., Weinstein, A., Williams, D. A., Wissel, S., Wood, M., Walker, R. C., Davies, F., Hardee, P. E., Junor, W., Ly, C., Aharonian, F., Akhperjanian, A. G., Anton, G., de Almeida, U. Barres, Bazer-Bachi, A. R., Becherini, Yvonne, Behera, B., Bernloehr, K., Bochow, A., Boisson, C., Bolmont, J., Borrel, V., Brucker, J., Brun, F., Brun, P., Buehler, R., Bulik, T., Buesching, I., Boutelier, T., Chadwick, P. M., Charbonnier, A., Chaves, R. C. G., Cheesebrough, A., Chounet, L. -M, Clapson, A. C., Coignet, G., Dalton, M., Daniel, M. K., Davids, I. D., Degrange, B., Deil, C., Dickinson, H. J., Djannati-Atai, A., Domainko, W., Drury, L. O ' C, Dubois, F., Dubus, G., Dyks, J., Dyrda, M., Egberts, K., Emmanoulopoulos, D., Espigat, P., Farnier, C., Feinstein, F., Fiasson, A., Foerster, A., Fontaine, G., Fuessling, M., Gabici, S., Gallant, Y. A., Gerard, L., Gerbig, D., Giebels, B., Glicenstein, J. F., Glueck, B., Goret, P., Goehring, D., Hauser, D., Hauser, M., Heinz, S., Heinzelmann, G., Henri, G., Hermann, G., Hinton, J. A., Hoffmann, A., Hofmann, W., Holleran, M., Hoppe, S., Horns, D., Jacholkowska, A., de Jager, O. C., Jahn, C., Jung, I., Katarzynski, K., Katz, U., Kaufmann, S., Kendziorra, E., Kerschhaggl, M., Khangulyan, D., Khelifi, B., Keogh, D., Kluzniak, W., Kneiske, T., Komin, Nu., Kosack, K., Lamanna, G., Lenain, J. -P, Lohse, T., Marandon, V., Martin, J. M., Martineau-Huynh, O., Marcowith, A., Maurin, D., McComb, T. J. L., Medina, M. C., Moderski, R., Moulin, E., Naumann-Godo, M., de Naurois, M., Nedbal, D., Nekrassov, D., Nicholas, B., Niemiec, J., Nolan, S. J., Ohm, S., Olive, J. -F, Wilhelmi, E. de Ona, Orford, K. J., Ostrowski, M., Panter, M., Arribas, M. Paz, Pedaletti, G., Pelletier, G., Petrucci, P. -O, Pita, S., Raue, M., Rayner, S. M., Renaud, M., Rieger, F., Ripken, J., Rob, L., Rosier-Lees, S., Rowell, G., Rudak, B., Rulten, C. B., Ruppel, J., Sahakian, V., Santangelo, A., Schlickeiser, R., Schoeck, F. M., Schroeder, R., Schwanke, U., Schwarzburg, S., Schwemmer, S., Shalchi, A., Sikora, M., Skilton, J. L., Sol, H., Spangler, D., Stawarz, L., Steenkamp, R., Stegmann, C., Stinzing, F., Superina, G., Szostek, A., Tam, P. H., Tavernet, J. -P, Terrier, R., Tibolla, O., Tluczykont, M., van Eldik, C., Vasileiadis, G., Venter, C., Venter, L., Vialle, J. P., Vincent, P., Vivier, M., Voelk, H. J., Volpe, F., Wagner, S. J., Ward, M., Zdziarski, A. A., Zech, A., Anderhub, H., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Balestra, S., Barrio, J. A., Bastieri, D., Gonzlez, J. Becerra, Becker, J. K., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Bock, R. K., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britvitch, I., Camara, M., Carmona, E., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Curtef, V., Dazzi, F., De Angelis, A., Del Pozo, E. De Cea, Mendez, C. Delgado, De los Reyes, R., De Lotto, B., De Maria, M., De Sabata, F., Dominguez, A., Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fernndez, E., Firpo, R., Fonseca, M. V., Font, L., Galante, N., Lopez, R. J. Garcia, Garczarczyk, M., Gaug, M., Goebel, F., Hadasch, D., Hayashida, M., Herrero, A., Hildebrand, D., Hoehne-Moench, D., Hose, J., Hsu, C. C., Jogler, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldon, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Oya, I., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Reichardt, I., Rhode, W., Ribo, M., Rico, J., Rissi, M., Robert, A., Ruegamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Shore, S. N., Sidro, N., Sierpowska-Bartosik, A., Sillanpaa, A., Sitarek, J., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L. S., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Torres, D. F., Turini, N., Vankov, H., Wagner, R. M., Zabalza, V., Zandanel, F., Zanin, R., Zapatero, J., Acciari, V. A., Aliu, E., Arlen, T., Bautista, M., Beilicke, M., Benbow, W., Bradbury, S. M., Buckley, J. H., Bugaev, V., Butt, Y., Byrum, K., Cannon, A., Celik, O., Cesarini, A., Chow, Y. C., Ciupik, L., Cogan, P., Cui, W., Dickherber, R., Fegan, S. J., Finley, J. P., Fortin, P., Fortson, L., Furniss, A., Gall, D., Gillanders, G. H., Grube, J., Guenette, R., Gyuk, G., Hanna, D., Holder, J., Horan, D., Hui, C. M., Humensky, T. B., Imran, A., Kaaret, P., Karlsson, N., Kieda, D., Kildea, J., Konopelko, A., Krawczynski, H., Krennrich, F., Lang, M. J., LeBohec, S., Maier, G., McCann, A., McCutcheon, M., Millis, J., Moriarty, P., Ong, R. A., Otte, A. N., Pandel, D., Perkins, J. S., Petry, D., Pohl, M., Quinn, J., Ragan, K., Reyes, L. C., Reynolds, P. T., Roache, E., Rose, H. J., Schroedter, M., Sembroski, G. H., Smith, A. W., Swordy, S. P., Theiling, M., Toner, J. A., Varlotta, A., Vincent, S., Wakely, S. P., Ward, J. E., Weekes, T. C., Weinstein, A., Williams, D. A., Wissel, S., Wood, M., Walker, R. C., Davies, F., Hardee, P. E., Junor, W., Ly, C., Aharonian, F., Akhperjanian, A. G., Anton, G., de Almeida, U. Barres, Bazer-Bachi, A. R., Becherini, Yvonne, Behera, B., Bernloehr, K., Bochow, A., Boisson, C., Bolmont, J., Borrel, V., Brucker, J., Brun, F., Brun, P., Buehler, R., Bulik, T., Buesching, I., Boutelier, T., Chadwick, P. M., Charbonnier, A., Chaves, R. C. G., Cheesebrough, A., Chounet, L. -M, Clapson, A. C., Coignet, G., Dalton, M., Daniel, M. K., Davids, I. D., Degrange, B., Deil, C., Dickinson, H. J., Djannati-Atai, A., Domainko, W., Drury, L. O ' C, Dubois, F., Dubus, G., Dyks, J., Dyrda, M., Egberts, K., Emmanoulopoulos, D., Espigat, P., Farnier, C., Feinstein, F., Fiasson, A., Foerster, A., Fontaine, G., Fuessling, M., Gabici, S., Gallant, Y. A., Gerard, L., Gerbig, D., Giebels, B., Glicenstein, J. F., Glueck, B., Goret, P., Goehring, D., Hauser, D., Hauser, M., Heinz, S., Heinzelmann, G., Henri, G., Hermann, G., Hinton, J. A., Hoffmann, A., Hofmann, W., Holleran, M., Hoppe, S., Horns, D., Jacholkowska, A., de Jager, O. C., Jahn, C., Jung, I., Katarzynski, K., Katz, U., Kaufmann, S., Kendziorra, E., Kerschhaggl, M., Khangulyan, D., Khelifi, B., Keogh, D., Kluzniak, W., Kneiske, T., Komin, Nu., Kosack, K., Lamanna, G., Lenain, J. -P, Lohse, T., Marandon, V., Martin, J. M., Martineau-Huynh, O., Marcowith, A., Maurin, D., McComb, T. J. L., Medina, M. C., Moderski, R., Moulin, E., Naumann-Godo, M., de Naurois, M., Nedbal, D., Nekrassov, D., Nicholas, B., Niemiec, J., Nolan, S. J., Ohm, S., Olive, J. -F, Wilhelmi, E. de Ona, Orford, K. J., Ostrowski, M., Panter, M., Arribas, M. Paz, Pedaletti, G., Pelletier, G., Petrucci, P. -O, Pita, S., Raue, M., Rayner, S. M., Renaud, M., Rieger, F., Ripken, J., Rob, L., Rosier-Lees, S., Rowell, G., Rudak, B., Rulten, C. B., Ruppel, J., Sahakian, V., Santangelo, A., Schlickeiser, R., Schoeck, F. M., Schroeder, R., Schwanke, U., Schwarzburg, S., Schwemmer, S., Shalchi, A., Sikora, M., Skilton, J. L., Sol, H., Spangler, D., Stawarz, L., Steenkamp, R., Stegmann, C., Stinzing, F., Superina, G., Szostek, A., Tam, P. H., Tavernet, J. -P, Terrier, R., Tibolla, O., Tluczykont, M., van Eldik, C., Vasileiadis, G., Venter, C., Venter, L., Vialle, J. P., Vincent, P., Vivier, M., Voelk, H. J., Volpe, F., Wagner, S. J., Ward, M., Zdziarski, A. A., Zech, A., Anderhub, H., Antonelli, L. A., Antoranz, P., Backes, M., Baixeras, C., Balestra, S., Barrio, J. A., Bastieri, D., Gonzlez, J. Becerra, Becker, J. K., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Bock, R. K., Bonnoli, G., Bordas, P., Tridon, D. Borla, Bosch-Ramon, V., Bose, D., Braun, I., Bretz, T., Britvitch, I., Camara, M., Carmona, E., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Covino, S., Curtef, V., Dazzi, F., De Angelis, A., Del Pozo, E. De Cea, Mendez, C. Delgado, De los Reyes, R., De Lotto, B., De Maria, M., De Sabata, F., Dominguez, A., Dorner, D., Doro, M., Elsaesser, D., Errando, M., Ferenc, D., Fernndez, E., Firpo, R., Fonseca, M. V., Font, L., Galante, N., Lopez, R. J. Garcia, Garczarczyk, M., Gaug, M., Goebel, F., Hadasch, D., Hayashida, M., Herrero, A., Hildebrand, D., Hoehne-Moench, D., Hose, J., Hsu, C. C., Jogler, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Meucci, M., Miranda, J. M., Mirzoyan, R., Miyamoto, H., Moldon, J., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Oya, I., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R. G., Perez-Torres, M. A., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Reichardt, I., Rhode, W., Ribo, M., Rico, J., Rissi, M., Robert, A., Ruegamer, S., Saggion, A., Saito, T. Y., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Shore, S. N., Sidro, N., Sierpowska-Bartosik, A., Sillanpaa, A., Sitarek, J., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L. S., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Torres, D. F., Turini, N., Vankov, H., Wagner, R. M., Zabalza, V., Zandanel, F., Zanin, R., and Zapatero, J.
Abstract: The accretion of matter onto a massive black hole is believed to feed the relativistic plasma jets found in many active galactic nuclei (AGN). Although some AGN accelerate particles to energies exceeding 10(12) electron volts and are bright sources of very-high-energy (VHE) gamma-ray emission, it is not yet known where the VHE emission originates. Here we report on radio and VHE observations of the radio galaxy Messier 87, revealing a period of extremely strong VHE gamma-ray flares accompanied by a strong increase of the radio flux from its nucleus. These results imply that charged particles are accelerated to very high energies in the immediate vicinity of the black hole.
Published: 2009
Full Text: View/download PDF

47. Radio Imaging of the Very-High-Energy y-Ray Emission Region in the Central Engine of a Radio Galaxy

Author: Acciari, V., Aliu, E., Arlen, T., Bautista, M., Beilicke, M., Benbow, W., Bradbury, S., Buckley, J., Bugaev, V., Butt, Y., Byrum, K., Cannon, A., Celik, O., Cesarini, A., Chow, Y., Ciupik, L., Cogan, P., Cui, W., Dickherber, R., Fegan, S., Finley, J., Fortin, P., Fortson, L., Fumiss, A., Gall, D., Gillanders, G., Grube, J., Guénette, R., Gyuk, G., Hanna, D., Holder, J., Horan, D., Hui, C., Humensky, T., Imran, A., Kaaret, P., Karlsson, N., Kieda, D., Kildea, J., Konopelko, A., Krawczynski, H., Krennrich, F., Lang, M., LeBohec, S., Maier, G., Mccann, A., McCutcheon, M., Millis, J., Moriarty, P., Ong, R., Otte, N., Pandel, D., Perkins, J., Petry, D., Pohl, M., Quinn, J., Ragan, K., Reyes, L., Reynolds, P., Roache, E., Rose, H., Schroedter, M., Sembroski, G., Smith, A., Swordy, S., Theiling, M., Toner, J., Varlotta, A., Vincent, S., Wakely, S., Ward, J., Weekes, T., Weinstein, A., Williams, D., Wissel, S., Wood, M., Waiker, R., Davies, F., Hardee, P., Junor, W., Ly, C., Aharonian, F., Akhperjanian, A., Anton, G., De Almeida, U., Bazer-Bachi, A., Becherini, Y., Behera, B., Bemlöhr, K., Bochow, A., Boisson, C., Bolmont, J., Borrel, V., Brucker, J., Brun, F., Brun, P., BüHLER, R., Bulik, T., Büsching, I., Boutelier, T., Chadwick, P., Charbonnier, A., Chaves, R., Cheesebrough, A., Chounet, L., Clapson, A., Coignet, G., Dalton, M., Daniel, M., Davids, I., Degrange, B., Deil, C., Dickinson, H., Djannati-Ataï, A., Domainko, W., Drury, L., Dubois, F., Dubus, G., Dyks, J., Dyrda, M., Egberts, K., Emmanoulopoulos, D., Espigat, P., Famier, C., Feinstein, F., Fiasson, A., Förster, A., Fontaine, G., Füßling, M., Gabici, S., Gallant, Y., Gerard, L., Gerbig, D., Giebels, B., Glicenstein, J., Glück, B., Goret, P., Göhring, D., Häuser, D., Hauser, M., Heinz, S., Heinzelmann, G., Henri, G., Hermann, G., Hinton, J., Hoffmann, A., Hofmann, W., Holleran, M., Hoppe, P., Horns, D., Jacholkowska, A., De Jager, O., Jahn, C., Jung, I., Katarzyriski, K., Katz, U., Kaufmann, S., Kendziorra, E., Kerschhaggl, M., Khangulyan, D., Khélifi, B., Keogh, D., Kluzniak, W., Kneiske, T., Kbmin, N., Kosack, K., Lamanna, G., Lenain, J., Lohse, T., Marandon, V., Martin, J., Martineau-Huynh, O., Marcowith, A., Maurin, D., McComb, T., Medina, C., Moderski, R., Moulin, E., Naumann-Godo, M., de Naurois, M., Nedbal, D., Nekrassov, D., Nicholas, B., Niemiec, J., Nolan, S., Ohm, S., Olive, J., de Oña Wilhelmi, E., Orford, K., Ostrowski, M., Panter, M., Paz Arribas, M., Pedaletti, G., Pelletier, G., Petrucci, P., Pita, S., Pühlhofer, G., Punch, M., Quirrenbach, A., Raubenheimer, B., Raue, M., Rayner, S., Renaud, M., Rieger, F., Ripken, J., Rob, L., Rosier Lees, S., Rowell, G., Rudak, B., Rulten, C., Ruppel, J., Sahakian, V., Santangelo, A., Schlickeiser, R., Schöck, F., Schröder, R., Schwanke, U., Schwarzburg, S., Schwemmer, S., Shalchi, A., Sikora, M., Skilton, J., Sol, H., Spangler, D., Stawarz, L., Steenkamp, R., Stegmann, C., Stinzing, F., Superina, G., Szostek, A., Tam, P., Tavernet, J., Terrier, R., Tibolla, Omar, Tluczykont, M., van Eldik, C., Vasileiadis, G., Venter, C., Venter, L., Vialle, J., Vincent, P., Vivier, M., Volk, H., Volpe, F., Wagner, S., Ward, M., Zdziarski, A., Zech, A., Anderhub, H., Antonelli, L., Antoranz, P., Backes, M., Baixeras, C., Balestra, S., Barrio, J., Bastieri, D., Becerra, J., Becker Tjus, J., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Bock, R., Bonnoli, G., Bordas, P., Borla Tridon, D., Bosch-Ramón, V., Bose, D., Braun, I., Bretz, T., Britvitch, I., Cámara, M., Carmona, E., Commichau, S., Contreras, J., Cortina, J., Costado, M., Covino, S., Curtef, V., Dazzi, F., de Angelis, A., De Cea Del Pozo, E., Méndez, C., de los Reyes Lopez, R., De Lotto, B., De Maria, M., De Sabata, F., Dominguez, A., Dorner, D., Dora, M., Elsaesser, D., Errando, M., Ferenc, D., Fernández, E., Firpo Curcoll, R., Fonseca, M., Font, L., Galante, N., López, R., Garczarczyk, M., Gaug, M., Goebel, F., Hadasch, D., Hayashida, M., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hsu, C., Jogler, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J., Mirzoyan, R., Miyamoto, H., Moldon, J., Moles, M., Moralejo Olaizola, A., Nieto, D., Nilsson, K., Ninkovic, J., Oya, I., Paoletti, R., Paredes, J., Pasanen, M., Pascoli, D., Paüss, F., Pegna, R., Pérez-Torres, M., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Reichardt, I., Rhode, W., Ribo, M., Rico, J., Rissi, M., Robert, A., Rugamer, S., Saggion, A., Salto, T., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Shore, S., Sidro, N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Torres, D., Turini, N., Vankov, H., Wagner, R., Zabalza, V., Zandanel, F., Zanin, R., Zapatera, J., Acciari, V., Aliu, E., Arlen, T., Bautista, M., Beilicke, M., Benbow, W., Bradbury, S., Buckley, J., Bugaev, V., Butt, Y., Byrum, K., Cannon, A., Celik, O., Cesarini, A., Chow, Y., Ciupik, L., Cogan, P., Cui, W., Dickherber, R., Fegan, S., Finley, J., Fortin, P., Fortson, L., Fumiss, A., Gall, D., Gillanders, G., Grube, J., Guénette, R., Gyuk, G., Hanna, D., Holder, J., Horan, D., Hui, C., Humensky, T., Imran, A., Kaaret, P., Karlsson, N., Kieda, D., Kildea, J., Konopelko, A., Krawczynski, H., Krennrich, F., Lang, M., LeBohec, S., Maier, G., Mccann, A., McCutcheon, M., Millis, J., Moriarty, P., Ong, R., Otte, N., Pandel, D., Perkins, J., Petry, D., Pohl, M., Quinn, J., Ragan, K., Reyes, L., Reynolds, P., Roache, E., Rose, H., Schroedter, M., Sembroski, G., Smith, A., Swordy, S., Theiling, M., Toner, J., Varlotta, A., Vincent, S., Wakely, S., Ward, J., Weekes, T., Weinstein, A., Williams, D., Wissel, S., Wood, M., Waiker, R., Davies, F., Hardee, P., Junor, W., Ly, C., Aharonian, F., Akhperjanian, A., Anton, G., De Almeida, U., Bazer-Bachi, A., Becherini, Y., Behera, B., Bemlöhr, K., Bochow, A., Boisson, C., Bolmont, J., Borrel, V., Brucker, J., Brun, F., Brun, P., BüHLER, R., Bulik, T., Büsching, I., Boutelier, T., Chadwick, P., Charbonnier, A., Chaves, R., Cheesebrough, A., Chounet, L., Clapson, A., Coignet, G., Dalton, M., Daniel, M., Davids, I., Degrange, B., Deil, C., Dickinson, H., Djannati-Ataï, A., Domainko, W., Drury, L., Dubois, F., Dubus, G., Dyks, J., Dyrda, M., Egberts, K., Emmanoulopoulos, D., Espigat, P., Famier, C., Feinstein, F., Fiasson, A., Förster, A., Fontaine, G., Füßling, M., Gabici, S., Gallant, Y., Gerard, L., Gerbig, D., Giebels, B., Glicenstein, J., Glück, B., Goret, P., Göhring, D., Häuser, D., Hauser, M., Heinz, S., Heinzelmann, G., Henri, G., Hermann, G., Hinton, J., Hoffmann, A., Hofmann, W., Holleran, M., Hoppe, P., Horns, D., Jacholkowska, A., De Jager, O., Jahn, C., Jung, I., Katarzyriski, K., Katz, U., Kaufmann, S., Kendziorra, E., Kerschhaggl, M., Khangulyan, D., Khélifi, B., Keogh, D., Kluzniak, W., Kneiske, T., Kbmin, N., Kosack, K., Lamanna, G., Lenain, J., Lohse, T., Marandon, V., Martin, J., Martineau-Huynh, O., Marcowith, A., Maurin, D., McComb, T., Medina, C., Moderski, R., Moulin, E., Naumann-Godo, M., de Naurois, M., Nedbal, D., Nekrassov, D., Nicholas, B., Niemiec, J., Nolan, S., Ohm, S., Olive, J., de Oña Wilhelmi, E., Orford, K., Ostrowski, M., Panter, M., Paz Arribas, M., Pedaletti, G., Pelletier, G., Petrucci, P., Pita, S., Pühlhofer, G., Punch, M., Quirrenbach, A., Raubenheimer, B., Raue, M., Rayner, S., Renaud, M., Rieger, F., Ripken, J., Rob, L., Rosier Lees, S., Rowell, G., Rudak, B., Rulten, C., Ruppel, J., Sahakian, V., Santangelo, A., Schlickeiser, R., Schöck, F., Schröder, R., Schwanke, U., Schwarzburg, S., Schwemmer, S., Shalchi, A., Sikora, M., Skilton, J., Sol, H., Spangler, D., Stawarz, L., Steenkamp, R., Stegmann, C., Stinzing, F., Superina, G., Szostek, A., Tam, P., Tavernet, J., Terrier, R., Tibolla, Omar, Tluczykont, M., van Eldik, C., Vasileiadis, G., Venter, C., Venter, L., Vialle, J., Vincent, P., Vivier, M., Volk, H., Volpe, F., Wagner, S., Ward, M., Zdziarski, A., Zech, A., Anderhub, H., Antonelli, L., Antoranz, P., Backes, M., Baixeras, C., Balestra, S., Barrio, J., Bastieri, D., Becerra, J., Becker Tjus, J., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Bock, R., Bonnoli, G., Bordas, P., Borla Tridon, D., Bosch-Ramón, V., Bose, D., Braun, I., Bretz, T., Britvitch, I., Cámara, M., Carmona, E., Commichau, S., Contreras, J., Cortina, J., Costado, M., Covino, S., Curtef, V., Dazzi, F., de Angelis, A., De Cea Del Pozo, E., Méndez, C., de los Reyes Lopez, R., De Lotto, B., De Maria, M., De Sabata, F., Dominguez, A., Dorner, D., Dora, M., Elsaesser, D., Errando, M., Ferenc, D., Fernández, E., Firpo Curcoll, R., Fonseca, M., Font, L., Galante, N., López, R., Garczarczyk, M., Gaug, M., Goebel, F., Hadasch, D., Hayashida, M., Herrero, A., Hildebrand, D., Höhne-Mönch, D., Hose, J., Hsu, C., Jogler, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Miranda, J., Mirzoyan, R., Miyamoto, H., Moldon, J., Moles, M., Moralejo Olaizola, A., Nieto, D., Nilsson, K., Ninkovic, J., Oya, I., Paoletti, R., Paredes, J., Pasanen, M., Pascoli, D., Paüss, F., Pegna, R., Pérez-Torres, M., Persic, M., Peruzzo, L., Prada, F., Prandini, E., Puchades, N., Reichardt, I., Rhode, W., Ribo, M., Rico, J., Rissi, M., Robert, A., Rugamer, S., Saggion, A., Salto, T., Salvati, M., Sanchez-Conde, M., Satalecka, K., Scalzotto, V., Scapin, V., Schweizer, T., Shayduk, M., Shore, S., Sidro, N., Sierpowska-Bartosik, A., Sillanpää, A., Sitarek, J., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Torres, D., Turini, N., Vankov, H., Wagner, R., Zabalza, V., Zandanel, F., Zanin, R., and Zapatera, J.
Published: 2009

48. Probing quantum gravity using photons from a flare of the active galactic nucleus Markarian 501 observed by the MAGIC telescope

Author: Albert, J., Aliu, E., Anderhub, H., Antonelli, L.A., Antoranz, P., Backes, M., Baixeras, C., Barrio, J.A., Bartko, H., Bastieri, D., Becker, J.K., Bednarek, W., Berger, K., Bernardini, E., Bigongiari, C., Biland, A., Bock, R.K., Bonnoli, G., Bordas, P., Bosch-Ramon, V., Bretz, T., Britvitch, I., Camara, M., Carmona, E., Chilingarian, A., Commichau, S., Contreras, J.L., Cortina, J., Costado, M.T., Covino, S., Curtef, V., Dazzi, F., De Angelis, A., De Cea del Pozo, E., Delgado Mendez, C., de los Reyes, R., De Lotto, B., De Maria, M., De Sabata, F., Dominguez, A., Dorner, D., Doro, M., Errando, M., Fagiolini, M., Ferenc, D., Fernández, E., Firpo, R., Fonseca, M.V., Font, L., Galante, N., García López, R.J., Garczarczyk, M., Gaug, M., Goebel, F., Hayashida, M., Herrero, A., Höhne, D., Hose, J., Hsu, C.C., Huber, S., Jogler, T., Kranich, D., La Barbera, A., Laille, A., Leonardo, E., Lindfors, E., Lombardi, S., Longo, F., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Meucci, M., Meyer, M., Miranda, J.M., Mirzoyan, R., Moles, M., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Otte, N., Oya, I., Panniello, M., Paoletti, R., Paredes, J.M., Pasanen, M., Pascoli, D., Pauss, F., Pegna, R.G., Perez-Torres, M.A., Persic, M., Peruzzo, L., Piccioli, A., Prada, F., Prandini, E., Puchades, N., Raymers, A., Rhode, W., Ribó, M., Rico, J., Rissi, M., Robert, A., Rügamer, S., Saggion, A., Saito, T.Y., Salvati, M., Sanchez-Conde, M., Sartori, P., Satalecka, K., Scalzotto, V., Scapin, V., Schmitt, R., Schweizer, T., Shayduk, M., Shinozaki, K., Sidro, N., Sierpowska-Bartosik, A., Sillanpää, A., Sobczynska, D., Spanier, F., Stamerra, A., Stark, L.S., Takalo, L., Tavecchio, F., Temnikov, P., Tescaro, D., Teshima, M., Tluczykont, M., Torres, D.F., Turini, N., Vankov, H., Venturini, A., Vitale, V., Wagner, R.M., Wittek, W., Zabalza, V., Zandanel, F., Zanin, R., Zapatero, J., Ellis, John, Mavromatos, N.E., Nanopoulos, D.V., Sakharov, A.S., and Sarkisyan, E.K.G.
Published: 2008
Full Text: View/download PDF

49. GAMMA-RAY EXCESS FROM A STACKED SAMPLE OF HIGH- AND INTERMEDIATE-FREQUENCY PEAKED BLAZARS OBSERVED WITH THE MAGIC TELESCOPE

Author: Aleksić, J., primary, Antonelli, L. A., additional, Antoranz, P., additional, Backes, M., additional, Baixeras, C., additional, Barrio, J. A., additional, Bastieri, D., additional, Becerra González, J., additional, Bednarek, W., additional, Berdyugin, A., additional, Berger, K., additional, Bernardini, E., additional, Biland, A., additional, Blanch, O., additional, Bock, R. K., additional, Bonnoli, G., additional, Bordas, P., additional, Borla Tridon, D., additional, Bosch-Ramon, V., additional, Bose, D., additional, Braun, I., additional, Bretz, T., additional, Britzger, D., additional, Camara, M., additional, Carmona, E., additional, Carosi, A., additional, Colin, P., additional, Commichau, S., additional, Contreras, J. L., additional, Cortina, J., additional, Costado, M. T., additional, Covino, S., additional, Dazzi, F., additional, De Angelis, A., additional, De Cea del Pozo, E., additional, De los Reyes, R., additional, De Lotto, B., additional, De Maria, M., additional, De Sabata, F., additional, Delgado Mendez, C, additional, Doert, M., additional, Domínguez, A., additional, Dominis Prester, D., additional, Dorner, D., additional, Doro, M., additional, Elsaesser, D., additional, Errando, M., additional, Ferenc, D., additional, Fonseca, M. V., additional, Font, L., additional, García López, R. J., additional, Garczarczyk, M., additional, Gaug, M., additional, Godinovic, N., additional, Hadasch, D., additional, Herrero, A., additional, Hildebrand, D., additional, Höhne-Mönch, D., additional, Hose, J., additional, Hrupec, D., additional, Hsu, C. C., additional, Jogler, T., additional, Klepser, S., additional, Krähenbühl, T., additional, Kranich, D., additional, Barbera, A. La, additional, Laille, A., additional, Leonardo, E., additional, Lindfors, E., additional, Lombardi, S., additional, Longo, F., additional, López, M., additional, Lorenz, E., additional, Majumdar, P., additional, Maneva, G., additional, Mankuzhiyil, N., additional, Mannheim, K., additional, Maraschi, L., additional, Mariotti, M., additional, Martínez, M., additional, Mazin, D., additional, Meucci, M., additional, Miranda, J. M., additional, Mirzoyan, R., additional, Miyamoto, H., additional, Moldón, J., additional, Moles, M., additional, Moralejo, A., additional, Nieto, D., additional, Nilsson, K., additional, Ninkovic, J., additional, Orito, R., additional, Oya, I., additional, Paiano, S., additional, Paoletti, R., additional, Paredes, J. M., additional, Partini, S., additional, Pasanen, M., additional, Pascoli, D., additional, Pauss, F., additional, Pegna, R. G., additional, Perez-Torres, M. A., additional, Persic, M., additional, Peruzzo, L., additional, Prada, F., additional, Prandini, E., additional, Puchades, N., additional, Puljak, I., additional, Reichardt, I., additional, Rhode, W., additional, Ribó, M., additional, Rico, J., additional, Rissi, M., additional, Rügamer, S., additional, Saggion, A., additional, Saito, T. Y., additional, Salvati, M., additional, Sánchez-Conde, M., additional, Satalecka, K., additional, Scalzotto, V., additional, Scapin, V., additional, Schultz, C., additional, Schweizer, T., additional, Shayduk, M., additional, Shore, S. N., additional, Sierpowska-Bartosik, A., additional, Sillanpää, A., additional, Sitarek, J., additional, Sobczynska, D., additional, Spanier, F., additional, Spiro, S., additional, Stamerra, A., additional, Steinke, B., additional, Struebig, J. C., additional, Suric, T., additional, Takalo, L., additional, Tavecchio, F., additional, Temnikov, P., additional, Terzic, T., additional, Tescaro, D., additional, Teshima, M., additional, Tibolla, O., additional, Torres, D. F., additional, Vankov, H., additional, Wagner, R. M., additional, Weitzel, Q., additional, Zabalza, V., additional, Zandanel, F., additional, and Zanin, R., additional
Published: 2011
Full Text: View/download PDF

50. OBSERVATIONS OF THE BLAZAR 3C 66A WITH THE MAGIC TELESCOPES IN STEREOSCOPIC MODE

Author: Aleksić, J., primary, Antonelli, L. A., additional, Antoranz, P., additional, Backes, M., additional, Barrio, J. A., additional, Bastieri, D., additional, González, J. Becerra, additional, Bednarek, W., additional, Berdyugin, A., additional, Berger, K., additional, Bernardini, E., additional, Biland, A., additional, Blanch, O., additional, Bock, R. K., additional, Boller, A., additional, Bonnoli, G., additional, Bordas, P., additional, Tridon, D. Borla, additional, Bosch-Ramon, V., additional, Bose, D., additional, Braun, I., additional, Bretz, T., additional, Camara, M., additional, Cañellas, A., additional, Carmona, E., additional, Carosi, A., additional, Colin, P., additional, Colombo, E., additional, Contreras, J. L., additional, Cortina, J., additional, Cossio, L., additional, Covino, S., additional, Dazzi, F., additional, De Angelis, A., additional, De Cea del Pozo, E., additional, De Lotto, B., additional, De Maria, M., additional, De Sabata, F., additional, Mendez, C. Delgado, additional, Ortega, A. Diago, additional, Doert, M., additional, Domínguez, A., additional, Prester, D. Dominis, additional, Dorner, D., additional, Doro, M., additional, Elsaesser, D., additional, Errando, M., additional, Ferenc, D., additional, Fonseca, M. V., additional, Font, L., additional, López, R. J. García, additional, Garczarczyk, M., additional, Giavitto, G., additional, Godinović, N., additional, Hadasch, D., additional, Herrero, A., additional, Hildebrand, D., additional, Höhne-Mönch, D., additional, Hose, J., additional, Hrupec, D., additional, Jogler, T., additional, Klepser, S., additional, Krähenbühl, T., additional, Kranich, D., additional, Krause, J., additional, La Barbera, A., additional, Leonardo, E., additional, Lindfors, E., additional, Lombardi, S., additional, Longo, F., additional, López, M., additional, Lorenz, E., additional, Majumdar, P., additional, Makariev, M., additional, Maneva, G., additional, Mankuzhiyil, N., additional, Mannheim, K., additional, Maraschi, L., additional, Mariotti, M., additional, Martínez, M., additional, Mazin, D., additional, Meucci, M., additional, Miranda, J. M., additional, Mirzoyan, R., additional, Miyamoto, H., additional, Moldón, J., additional, Moralejo, A., additional, Nieto, D., additional, Nilsson, K., additional, Orito, R., additional, Oya, I., additional, Paoletti, R., additional, Paredes, J. M., additional, Partini, S., additional, Pasanen, M., additional, Pauss, F., additional, Pegna, R. G., additional, Perez-Torres, M. A., additional, Persic, M., additional, Peruzzo, L., additional, Pochon, J., additional, Prada, F., additional, Moroni, P. G. Prada, additional, Prandini, E., additional, Puchades, N., additional, Puljak, I., additional, Reichardt, I., additional, Reinthal, R., additional, Rhode, W., additional, Ribó, M., additional, Rico, J., additional, Rügamer, S., additional, Saggion, A., additional, Saito, K., additional, Saito, T. Y., additional, Salvati, M., additional, Sánchez-Conde, M., additional, Satalecka, K., additional, Scalzotto, V., additional, Scapin, V., additional, Schultz, C., additional, Schweizer, T., additional, Shayduk, M., additional, Shore, S. N., additional, Sierpowska-Bartosik, A., additional, Sillanpää, A., additional, Sitarek, J., additional, Sobczynska, D., additional, Spanier, F., additional, Spiro, S., additional, Stamerra, A., additional, Steinke, B., additional, Storz, J., additional, Strah, N., additional, Struebig, J. C., additional, Suric, T., additional, Takalo, L., additional, Tavecchio, F., additional, Temnikov, P., additional, Terzić, T., additional, Tescaro, D., additional, Teshima, M., additional, Thom, M., additional, Torres, D. F., additional, Vankov, H., additional, Wagner, R. M., additional, Weitzel, Q., additional, Zabalza, V., additional, Zandanel, F., additional, and Zanin, R., additional
Published: 2010
Full Text: View/download PDF

Catalog

Books, media, physical & digital resources

See catalog results

Searchworks

Select search scope, currently: Articles Catalog books, media & more in Jio Institute collections Articles journal articles & other e-resources

Search

Search Constraints

Refine your results

Search Limiters

Topic

Publication Year Range

Language

Publication Type

Journal

Database

Publisher

136 results on '"Sabata, F."'

Search Results

Catalog

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources