Author: "Trüstedt, J." - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"Trüstedt, J."' showing total 30 results

Start Over Author "Trüstedt, J."

30 results on '"Trüstedt, J."'

1. TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sources

Author: Müller, C., Kadler, M., Ojha, R., Schulz, R., Trüstedt, J., Edwards, P. G., Ros, E., Carpenter, B., Angioni, R., Blanchard, J., Böck, M., Burd, P. R., Dörr, M., Dutka, M. S., Eberl, T., Gulyaev, S., Hase, H., Horiuchi, S., Katz, U., Krauß, F., Lovell, J. E. J., Natusch, T., Nesci, R., Phillips, C., Plötz, C., Pursimo, T., Quick, J. F. H., Stevens, J., Thompson, D. J., Tingay, S. J., Tzioumis, A. K., Weston, S., Wilms, J., and Zensus, J. A.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: TANAMI is a multiwavelength program monitoring active galactic nuclei (AGN) south of -30deg declination including high-resolution Very Long Baseline Interferometry (VLBI) imaging, radio, optical/UV, X-ray and gamma-ray studies. We have previously published first-epoch 8.4GHz VLBI images of the parsec-scale structure of the initial sample. In this paper, we present images of 39 additional sources. The full sample comprises most of the radio- and gamma-ray brightest AGN in the southern quarter of the sky, overlapping with the region from which high-energy (>100TeV) neutrino events have been found. We characterize the parsec-scale radio properties of the jets and compare with the quasi-simultaneous Fermi/LAT gamma-ray data. Furthermore, we study the jet properties of sources which are in positional coincidence with high-energy neutrino events as compared to the full sample. We test the positional agreement of high-energy neutrino events with various AGN samples. Our observations yield the first images of many jets below -30deg declination at milliarcsecond resolution. We find that gamma-ray loud TANAMI sources tend to be more compact on parsec-scales and have higher core brightness temperatures than gamma-ray faint jets, indicating higher Doppler factors. No significant structural difference is found between sources in positional coincidence with high-energy neutrino events and other TANAMI jets. The 22 gamma-ray brightest AGN in the TANAMI sky show only a weak positional agreement with high-energy neutrinos demonstrating that the >100TeV IceCube signal is not simply dominated by a small number of the $\gamma$-ray brightest blazars. Instead, a larger number of sources have to contribute to the signal with each individual source having only a small Poisson probability for producing an event in multi-year integrations of current neutrino detectors., Comment: A&A accepted (edited version), 21 pages, 13 figures
Published: 2017
Full Text: View/download PDF

2. Coincidence of a high-fluence blazar outburst with a PeV-energy neutrino event

Author: Kadler, M., Krauß, F., Mannheim, K., Ojha, R., Müller, C., Schulz, R., Anton, G., Baumgartner, W., Beuchert, T., Buson, S., Carpenter, B., Eberl, T., Edwards, P. G., Glawion, D. Eisenacher, Elsässer, D., Gehrels, N., Gräfe, C., Hase, H., Horiuchi, S., James, C. W., Kappes, A., Katz, U., Kreikenbohm, A., Kreter, M., Kreykenbohm, I., Langejahn, M., Leiter, K., Litzinger, E., Longo, F., Lovell, J. E. J., McEnery, J., Phillips, C., Plötz, C., Quick, J., Ros, E., Stecker, F. W., Steinbring, T., Stevens, J., Thompson, D. J., Trüstedt, J., Tzioumis, A. K., Wilms, J., and Zensus, J. A.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology
Abstract: The discovery of extraterrestrial very-high-energy neutrinos by the IceCube collaboration has launched a quest for the identification of their astrophysical sources. Gamma-ray blazars have been predicted to yield a cumulative neutrino signal exceeding the atmospheric background above energies of 100 TeV, assuming that both the neutrinos and the gamma-ray photons are produced by accelerated protons in relativistic jets. Since the background spectrum falls steeply with increasing energy, the individual events with the clearest signature of being of an extraterrestrial origin are those at PeV energies. Inside the large positional-uncertainty fields of the first two PeV neutrinos detected by IceCube, the integrated emission of the blazar population has a sufficiently high electromagnetic flux to explain the detected IceCube events, but fluences of individual objects are too low to make an unambiguous source association. Here, we report that a major outburst of the blazar PKS B1424-418 occurred in temporal and positional coincidence with the third PeV-energy neutrino event (IC35) detected by IceCube. Based on an analysis of the full sample of gamma-ray blazars in the IC35 field and assuming a photo-hadronic emission model, we show that the long-term average gamma-ray emission of blazars as a class is in agreement with both the measured all-sky flux of PeV neutrinos and the spectral slope of the IceCube signal. The outburst of PKS B1424-418 has provided an energy output high enough to explain the observed PeV event, indicative of a direct physical association., Comment: Accepted for publication in Nature Physics on Mar 3rd, 2016 (arXiv version is the original submitted manuscript as per NatPhys regulations), 38 pages (including 10 pages of supplementary material), 3 figures
Published: 2016
Full Text: View/download PDF

3. The Gamma-Ray Emitting Radio-Loud Narrow-Line Seyfert 1 Galaxy PKS 2004-447 II. The Radio View

Author: Schulz, R., Kreikenbohm, A., Kadler, M., Ojha, R., Ros, E., Stevens, J., Edwards, P. G., Carpenter, B., Elsässer, D., Gehrels, N., Großberger, C., Hase, H., Horiuchi, S., Lovell, J. E. J., Mannheim, K., Markowitz, A., Müller, C., Phillips, C., Plötz, C., Quick, J., Trüstedt, J., Tzioumis, A. K., and Wilms, J.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Gamma-ray detected radio-loud narrow-line Seyfert 1 (g-NLS1) galaxies constitute a small but interesting sample of the gamma-ray loud AGN. The radio-loudest g-NLS1 known, PKS 2004-447, is located in the southern hemisphere and is monitored in the radio regime by the multiwavelength monitoring program TANAMI. We aim for the first detailed study of the radio morphology and long-term radio spectral evolution of PKS 2004-447, which are essential to understand the diversity of the radio properties of g-NLS1s. The TANAMI VLBI monitoring program uses the Australian Long Baseline Array (LBA) and telescopes in Antarctica, Chile, New Zealand, and South Africa to monitor the jets of radio-loud active galaxies in the southern hemisphere. Lower resolution radio flux density measurements at multiple radio frequencies over four years of observations were obtained with the Australia Telescope Compact Array (ATCA). The TANAMI VLBI image at 8.4 GHz shows an extended one-sided jet with a dominant compact VLBI core. Its brightness temperature is consistent with equipartition, but it is an order of magnitude below other g-NLS1s with the sample value varying over two orders of magnitude. We find a compact morphology with a projected large-scale size <11 kpc and a persistent steep radio spectrum with moderate flux-density variability. PKS 2004-447 appears to be a unique member of the g-NLS1 sample. It exhibits blazar-like features, such as a flat featureless X-ray spectrum and a core dominated, one-sided parsec-scale jet with indications for relativistic beaming. However, the data also reveal properties atypical for blazars, such as a radio spectrum and large-scale size consistent with Compact-Steep-Spectrum (CSS) objects, which are usually associated with young radio sources. These characteristics are unique among all g-NLS1s and extremely rare among gamma-ray loud AGN., Comment: 11 pages, 4 figures, accepted by Astronomy & Astrophysics
Published: 2015
Full Text: View/download PDF

4. The LOFAR Multifrequency Snapshot Sky Survey (MSSS) I. Survey description and first results

Author: Heald, G. H., Pizzo, R. F., Orrú, E., Breton, R. P., Carbone, D., Ferrari, C., Hardcastle, M. J., Jurusik, W., Macario, G., Mulcahy, D., Rafferty, D., Asgekar, A., Brentjens, M., Fallows, R. A., Frieswijk, W., Toribio, M. C., Adebahr, B., Arts, M., Bell, M. R., Bonafede, A., Bray, J., Broderick, J., Cantwell, T., Carroll, P., Cendes, Y., Clarke, A. O., Croston, J., Daiboo, S., de Gasperin, F., Gregson, J., Harwood, J., Hassall, T., Heesen, V., Horneffer, A., van der Horst, A. J., Iacobelli, M., Jelić, V., Jones, D., Kant, D., Kokotanekov, G., Martin, P., McKean, J. P., Morabito, L. K., Nikiel-Wroczyński, B., Offringa, A., Pandey, V. N., Pandey-Pommier, M., Pietka, M., Pratley, L., Riseley, C., Rowlinson, A., Sabater, J., Scaife, A. M. M., Scheers, L. H. A., Sendlinger, K., Shulevski, A., Sipior, M., Sobey, C., Stewart, A. J., Stroe, A., Swinbank, J., Tasse, C., Trüstedt, J., Varenius, E., van Velzen, S., Vilchez, N., van Weeren, R. J., Wijnholds, S., Williams, W. L., de Bruyn, A. G., Nijboer, R., Wise, M., Alexov, A., Anderson, J., Avruch, I. M., Beck, R., Bell, M. E., van Bemmel, I., Bentum, M. J., Bernardi, G., Best, P., Breitling, F., Brouw, W. N., Brüggen, M., Butcher, H. R., Ciardi, B., Conway, J. E., de Geus, E., de Jong, A., de Vos, M., Deller, A., Dettmar, R. J., Duscha, S., Eislöffel, J., Engels, D., Falcke, H., Fender, R., Garrett, M. A., Grießmeier, J., Gunst, A. W., Hamaker, J. P., Hessels, J. W. T., Hoeft, M., Hörandel, J., Holties, H. A., Intema, H., Jackson, N. J., Jütte, E., Karastergiou, A., Klijn, W. F. A., Kondratiev, V. I., Koopmans, L. V. E., Kuniyoshi, M., Kuper, G., Law, C., van Leeuwen, J., Loose, M., Maat, P., Markoff, S., McFadden, R., McKay-Bukowski, D., Mevius, M., Miller-Jones, J. C. A., Morganti, R., Munk, H., Nelles, A., Noordam, J. E., Norden, M. J., Paas, H., Polatidis, A. G., Reich, W., Renting, A., Röttgering, H., Schoenmakers, A., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B. W., Steinmetz, M., Tagger, M., Tang, Y., ter Veen, S., Thoudam, S., Vermeulen, R., Vocks, C., Vogt, C., Wijers, R. A. M. J., Wucknitz, O., Yatawatta, S., and Zarka, P.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: We present the Multifrequency Snapshot Sky Survey (MSSS), the first northern-sky LOFAR imaging survey. In this introductory paper, we first describe in detail the motivation and design of the survey. Compared to previous radio surveys, MSSS is exceptional due to its intrinsic multifrequency nature providing information about the spectral properties of the detected sources over more than two octaves (from 30 to 160 MHz). The broadband frequency coverage, together with the fast survey speed generated by LOFAR's multibeaming capabilities, make MSSS the first survey of the sort anticipated to be carried out with the forthcoming Square Kilometre Array (SKA). Two of the sixteen frequency bands included in the survey were chosen to exactly overlap the frequency coverage of large-area Very Large Array (VLA) and Giant Metrewave Radio Telescope (GMRT) surveys at 74 MHz and 151 MHz respectively. The survey performance is illustrated within the "MSSS Verification Field" (MVF), a region of 100 square degrees centered at J2000 (RA,Dec)=(15h,69deg). The MSSS results from the MVF are compared with previous radio survey catalogs. We assess the flux and astrometric uncertainties in the catalog, as well as the completeness and reliability considering our source finding strategy. We determine the 90% completeness levels within the MVF to be 100 mJy at 135 MHz with 108" resolution, and 550 mJy at 50 MHz with 166" resolution. Images and catalogs for the full survey, expected to contain 150,000-200,000 sources, will be released to a public web server. We outline the plans for the ongoing production of the final survey products, and the ultimate public release of images and source catalogs., Comment: 23 pages, 19 figures. Accepted for publication in Astronomy & Astrophysics. MSSS Verification Field images and catalog data may be downloaded from http://vo.astron.nl
Published: 2015
Full Text: View/download PDF

5. The EVN view of the highly variable TeV active galaxy IC 310

Author: Schulz, R., Kadler, M., Ros, E., Glawion, D. Eisenacher, Bach, U., Elsässer, D., Grossberger, C., Kreykenbohm, I., Mannheim, K., Müller, C., Trüstedt, J., and Wilms, J.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Very-high-energy $\gamma$-ray observations of the active galaxy IC 310 with the MAGIC telescopes have revealed fast variability with doubling time scales of less than 4.8min. This implies that the emission region in IC 310 is smaller than 20% of the gravitational radius of the central supermassive black hole with a mass of $3\times 10^8 M_\odot$, which poses serious questions on the emission mechanism and classification of this enigmatic object. We report on the first quasi-simultaneous multi-frequency VLBI observations of IC 310 conducted with the EVN. We find a blazar-like one-sided core-jet structure on parsec scales, constraining the inclination angle to be less than $\sim 20^\circ$ but very small angles are excluded to limit the de-projected length of the large-scale radio jet., Comment: 4 pages, proceedings of the 12th European VLBI Network Symposium and Users Meeting - EVN 2014, 7-10 October 2014, Cagliari, Italy. Published online in PoS, ID.109
Published: 2015

6. ANTARES Constrains a Blazar Origin of Two IceCube PeV Neutrino Events

Author: ANTARES Collaboration, Adrián-Martínez, S., Albert, A., André, M., Anton, G., Ardid, M., Aubert, J. -J., Baret, B., Barrios, J., Basa, S., Bertin, V., Biagi, S., Bogazzi, C., Bormuth, R., Bou-Cabo, M., Bouwhuis, M. C., Bruijn, R., Brunner, J., Busto, J., Capone, A., Caramete, L., Carr, J., Chiarusi, T., Circella, M., Coniglione, R., Costantini, H., Coyle, P., Creusot, A., De Rosa, G., Dekeyser, I., Deschamps, A., De Bonis, G., Distefano, C., Donzaud, C., Dornic, D., Dorosti, Q., Drouhin, D., Dumas, A., Eberl, T., Enzenhöfer, A., Escoffier, S., Fehn, K., Felis, I., Fermani, P., Folger, F., Fusco, L. A., Galatà, S., Gay, P., Geißelsöder, S., Geyer, K., Giordano, V., Gleixner, A., Gómez-González, J. P., Gracia-Ruiz, R., Graf, K., Guillard, G., van Haren, H., Heijboer, A. J., Hello, Y., Hernández-Rey, J. J., Herrero, A., Hößl, J., Hofestädt, J., Hugon, C., James, C. W, de Jong, M., Kalekin, O., Katz, U., Kießling, D., Kooijman, P., Kouchner, A., Kulikovskiy, V., Lahmann, R., Lefèvre, D., Leonora, E., Loehner, H., Loucatos, S., Mangano, S., Marcelin, M., Margiotta, A., Martínez-Mora, J. A., Martini, S., Mathieu, A., Michael, T., Migliozzi, P., Neff, M., Nezri, E., Palioselitis, D., Păvălaş, G. E., Pellegrino, C., Perrina, C., Piattelli, P., Popa, V., Pradier, T., Racca, C., Riccobene, G., Richter, R., Roensch, K., Rostovtsev, A., Saldaña, M., Samtleben, D. F. E., Sánchez-Losa, A., Sanguineti, M., Sapienza, P., Schmid, J., Schnabel, J., Schulte, S., Schüssler, F., Seitz, T., Sieger, C., Spies, A., Spurio, M., Steijger, J. J. M., Stolarczyk, Th., Taiuti, M., Tamburini, C., Tayalati, Y., Trovato, A., Tselengidou, M., Tönnis, C., Vallage, B., Vallée, C., Van Elewyck, V., Visser, E., Vivolo, D., Wagner, S., de Wolf, E., Yepes, H., Zornoza, J. D., Zúñiga, J., Collaboration, TANAMI, Krauß, F., Kadler, M., Mannheim, K., Schulz, R., Trüstedt, J., Wilms, J., Ojha, R., Ros, E., Baumgartner, W., Beuchert, T., Blanchard, J., Bürkel, C., Carpenter, B., Edwards, P. G., Glawion, D. Eisenacher, Elsässer, D., Fritsch, U., Gehrels, N., Gräfe, C., Großberger, C., Hase, H., Horiuchi, S., Kappes, A., Kreikenbohm, A., Kreykenbohm, I., Langejahn, M., Leiter, K., Litzinger, E., Lovell, J. E. J., Müller, C., Phillips, C., Plötz, C., Quick, J., Steinbring, T., Stevens, J., Thompson, D. J., and Tzioumis, A. K.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The source(s) of the neutrino excess reported by the IceCube Collaboration is unknown. The TANAMI Collaboration recently reported on the multiwavelength emission of six bright, variable blazars which are positionally coincident with two of the most energetic IceCube events. Objects like these are prime candidates to be the source of the highest-energy cosmic rays, and thus of associated neutrino emission. We present an analysis of neutrino emission from the six blazars using observations with the ANTARES neutrino telescope.The standard methods of the ANTARES candidate list search are applied to six years of data to search for an excess of muons --- and hence their neutrino progenitors --- from the directions of the six blazars described by the TANAMI Collaboration, and which are possibly associated with two IceCube events. Monte Carlo simulations of the detector response to both signal and background particle fluxes are used to estimate the sensitivity of this analysis for different possible source neutrino spectra. A maximum-likelihood approach, using the reconstructed energies and arrival directions of through-going muons, is used to identify events with properties consistent with a blazar origin.Both blazars predicted to be the most neutrino-bright in the TANAMI sample (1653$-$329 and 1714$-$336) have a signal flux fitted by the likelihood analysis corresponding to approximately one event. This observation is consistent with the blazar-origin hypothesis of the IceCube event IC14 for a broad range of blazar spectra, although an atmospheric origin cannot be excluded. No ANTARES events are observed from any of the other four blazars, including the three associated with IceCube event IC20. This excludes at a 90\% confidence level the possibility that this event was produced by these blazars unless the neutrino spectrum is flatter than $-2.4$., Comment: 15 pages, 3 figures, 2 tables
Published: 2015
Full Text: View/download PDF

7. TANAMI monitoring of Centaurus A: The complex dynamics in the inner parsec of an extragalactic jet

Author: Müller, C., Kadler, M., Ojha, R., Perucho, M., Großberger, C., Ros, E., Wilms, J., Blanchard, J., Böck, M., Carpenter, B., Dutka, M., Edwards, P. G., Hase, H., Horiuchi, S., Kreikenbohm, A., Lovell, J. E. J., Markowitz, A., Phillips, C., Plötz, C., Pursimo, T., Quick, J., Rothschild, R., Schulz, R., Steinbring, T., Stevens, J., Trüstedt, J., and Tzioumis, A. K.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Centaurus A is the closest radio-loud active galaxy. Very Long Baseline Interferometry (VLBI) enables us to study the jet-counterjet system on milliarcsecond (mas) scales, providing essential information for jet emission and propagation models. We study the evolution of the central parsec jet structure of Cen A over 3.5 years. The proper motion analysis of individual jet components allows us to constrain jet formation and propagation and to test the proposed correlation of increased high energy flux with jet ejection events. Cen A is an exceptional laboratory for such detailed study as its proximity translates to unrivaled linear resolution, where 1 mas corresponds to 0.018 pc. The first 7 epochs of high-resolution TANAMI VLBI observations at 8 GHz of Cen A are presented, resolving the jet on (sub-)mas scales. They show a differential motion of the sub-pc scale jet with significantly higher component speeds further downstream where the jet becomes optically thin. We determined apparent component speeds within a range of 0.1c to 0.3c, as well as identified long-term stable features. In combination with the jet-to-counterjet ratio we can constrain the angle to the line of sight to ~12{\deg} to 45{\deg}. The high resolution kinematics are best explained by a spine-sheath structure supported by the downstream acceleration occurring where the jet becomes optically thin. On top of the underlying, continuous flow, TANAMI observations clearly resolve individual jet features. The flow appears to be interrupted by an obstacle causing a local decrease in surface brightness and a circumfluent jet behavior. We propose a jet-star interaction scenario to explain this appearance. The comparison of jet ejection times with high X-ray flux phases yields a partial overlap of the onset of the X-ray emission and increasing jet activity, but the limited data do not support a robust correlation., Comment: 16 pages, 10 figures, A&A, 569, L115 (accepted 23th June, published online 1st October)
Published: 2014
Full Text: View/download PDF

8. Future mmVLBI Research with ALMA: A European vision

Author: Tilanus, R. P. J., Krichbaum, T. P., Zensus, J. A., Baudry, A., Bremer, M., Falcke, H., Giovannini, G., Laing, R., van Langevelde, H. J., Vlemmings, W., Abraham, Z., Afonso, J., Agudo, I., Alberdi, A., Alcolea, J., Altamirano, D., Asadi, S., Assaf, K., Augusto, P., Baczko, A-K., Boeck, M., Boller, T., Bondi, M., Boone, F., Bourda, G., Brajsa, R., Brand, J., Britzen, S., Bujarrabal, V., Cales, S., Casadio, C., Casasola, V., Castangia, P., Cernicharo, J., Charlot, P., Chemin, L., Clenet, Y., Colomer, F., Combes, F., Cordes, J., Coriat, M., Cross, N., D'Ammando, F., Dallacasa, D., Desmurs, J-F., Eatough, R., Eckart, A., Eisenacher, D., Etoka, S., Felix, M., Fender, R., Ferreira, M., Freeland, E., Frey, S., Fromm, C., Fuhrmann, L., Gabanyi, K., Galvan-Madrid, R., Giroletti, M., Goddi, C., Gomez, J., Gourgoulhon, E., Gray, M., di Gregorio, I., Greimel, R., Grosso, N., Guirado, J., Hada, K., Hanslmeier, A., Henkel, C., Herpin, F., Hess, P., Hodgson, J., Horns, D., Humphreys, E., Kramer, B. Hutawarakorn, Ilyushin, V., Impellizzeri, V., Ivanov, V., Julião, M., Kadler, M., Kerins, E., Klaassen, P., Klooster, K. van 't, Kording, E., Kozlov, M., Kramer, M., Kreikenbohm, A., Kurtanidze, O., Lazio, J., Leite, A., Leitzinger, M., Lepine, J., Levshakov, S., Lico, R., Lindqvist, M., Liuzzo, E., Lobanov, A., Lucas, P., Mannheim, K., Marcaide, J., Markoff, S., Martí-Vidal, I., Martins, C., Masetti, N., Massardi, M., Menten, K., Messias, H., Migliari, S., Mignano, A., Miller-Jones, J., Minniti, D., Molaro, P., Molina, S., Monteiro, A., Moscadelli, L., Mueller, C., Müller, A., Muller, S., Niederhofer, F., Odert, P., Olofsson, H., Orienti, M., Paladino, R., Panessa, F., Paragi, Z., Paumard, T., Pedrosa, P., Pérez-Torres, M., Perrin, G., Perucho, M., Porquet, D., Prandoni, I., Ransom, S., Reimers, D., Rejkuba, M., Rezzolla, L., Richards, A., Ros, E., Roy, A., Rushton, A., Savolainen, T., Schulz, R., Silva, M., Sivakoff, G., Soria-Ruiz, R., Soria, R., Spaans, M., Spencer, R., Stappers, B., Surcis, G., Tarchi, A., Temmer, M., Thompson, M., Torrelles, J., Truestedt, J., Tudose, V., Venturi, T., Verbiest, J., Vieira, J., Vielzeuf, P., Vincent, F., Wex, N., Wiik, K., Wiklind, T., Wilms, J., Zackrisson, E., and Zechlin, H.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: Very long baseline interferometry at millimetre/submillimetre wavelengths (mmVLBI) offers the highest achievable spatial resolution at any wavelength in astronomy. The anticipated inclusion of ALMA as a phased array into a global VLBI network will bring unprecedented sensitivity and a transformational leap in capabilities for mmVLBI. Building on years of pioneering efforts in the US and Europe the ongoing ALMA Phasing Project (APP), a US-led international collaboration with MPIfR-led European contributions, is expected to deliver a beamformer and VLBI capability to ALMA by the end of 2014 (APP: Fish et al. 2013, arXiv:1309.3519). This report focuses on the future use of mmVLBI by the international users community from a European viewpoint. Firstly, it highlights the intense science interest in Europe in future mmVLBI observations as compiled from the responses to a general call to the European community for future research projects. A wide range of research is presented that includes, amongst others: - Imaging the event horizon of the black hole at the centre of the Galaxy - Testing the theory of General Relativity an/or searching for alternative theories - Studying the origin of AGN jets and jet formation - Cosmological evolution of galaxies and BHs, AGN feedback - Masers in the Milky Way (in stars and star-forming regions) - Extragalactic emission lines and astro-chemistry - Redshifted absorption lines in distant galaxies and study of the ISM and circumnuclear gas - Pulsars, neutron stars, X-ray binaries - Testing cosmology - Testing fundamental physical constants, Comment: Replaced figures 2 and 3: corrected position SRT. Corrected minor typo in 5.1
Published: 2014

9. TANAMI Blazars in the IceCube PeV Neutrino Fields

Author: Krauß, F., Kadler, M., Mannheim, K., Schulz, R., Trüstedt, J, Wilms, J., Ojha, R., Ros, E., Anton, G., Baumgartner, W., Beuchert, T., Blanchard, J., Bürkel, C., Carpenter, B., Eberl, T., Edwards, P. G., Eisenacher, D., Elsässer, D., Fehn, K., Fritsch, U., Gehrels, N., Gräfe, C., Großberger, C., Hase, H., Horiuchi, S., James, C., Kappes, A., Katz, U., Kreikenbohm, A., Kreykenbohm, I., Langejahn, M., Leiter, K., Litzinger, E., Lovell, J. E. J., Müller, C., Phillips, C., Plötz, C., Quick, J., Steinbring, T., Stevens, J., Thompson, D. J., and Tzioumis, A. K.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract: The IceCube Collaboration has announced the discovery of a neutrino flux in excess of the atmospheric background. Due to the steeply falling atmospheric background spectrum, events at PeV energies are most likely of extraterrestrial origin. We present the multiwavelength properties of the six radio brightest blazars positionally coincident with these events using contemporaneous data of the TANAMI blazar sample, including high-resolution images and spectral energy distributions. Assuming the X-ray to {\gamma}-ray emission originates in the photoproduction of pions by accelerated protons, the integrated predicted neutrino luminosity of these sources is large enough to explain the two detected PeV events., Comment: accepted to A&A, 2 June
Published: 2014
Full Text: View/download PDF

10. The unusual multiwavelength properties of the gamma-ray source PMNJ1603-4904

Author: Müller, Cornelia, Kadler, M., Ojha, R., Böck, M., Krauß, F., Taylor, G. B., Wilms, J., Blanchard, J., Carpenter, B., Dauser, T., Dutka, M., Edwards, P. G., Gehrels, N., Großberger, C., Hase, H., Horiuchi, S., Kreikenbohm, A., Lovell, J. E. J., McConville, W., Phillips, C., Plötz, C., Pursimo, T., Quick, J., Ros, E., Schulz, R., Stevens, J., Tingay, S. J., Trüstedt, J., Tzioumis, A. K., and Zensus, J. A.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies
Abstract: We investigate the nature and classification of PMNJ1603-4904, a bright radio source close to the Galactic plane, which is associated with one of the brightest hard-spectrum gamma-ray sources detected by Fermi/LAT. It has previously been classified as a low-peaked BL Lac object based on its broadband emission and the absence of optical emission lines. Optical measurements, however, suffer strongly from extinction and the absence of pronounced short-time gamma-ray variability over years of monitoring is unusual for a blazar. We are combining new and archival multiwavelength data in order to reconsider the classification and nature of this unusual gamma-ray source. For the first time, we study the radio morphology at 8.4GHz and 22.3GHz, and its spectral properties on milliarcsecond (mas) scales, based on VLBI observations from the TANAMI program. We combine the resulting images with multiwavelength data in the radio, IR, optical/UV, X-ray, and gamma-ray regimes. PMNJ1603-4904 shows a symmetric brightness distribution at 8.4GHz on mas-scales, with the brightest, and most compact component in the center of the emission region. The morphology is reminiscent of a Compact Symmetric Object (CSO). Such objects have been predicted to produce gamma-ray emission but have not been detected as a class by Fermi/LAT so far. Sparse (u, v)-coverage at 22.3GHz prevents an unambiguous modeling of the source morphology. IR measurements reveal an excess in the spectral energy distribution (SED), which can be modeled with a blackbody with a temperature of about 1600K, and which is usually not present in blazar SEDs. The VLBI data and the shape of the SED challenge the current blazar classification. PMNJ1603-4904 seems to be either a highly peculiar BL Lac object or a misaligned jet source. In the latter case, the intriguing VLBI structure opens room for a possible classification as a gamma-ray bright CSO., Comment: 11 pages, 7 figures, accepted for publication in Astronomy & Astrophysics
Published: 2013
Full Text: View/download PDF

11. The TANAMI Program: Southern-Hemisphere AGN on (Sub-)parsec Scales

Author: Müller, Cornelia, Krauss, F., Kadler, M., Trüstedt, J., Ojha, R., Ros, E., Wilms, J., Böck, M., Dutka, M., Carpenter, B., and collaboration, the TANAMI
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Extragalactic Astrophysics
Abstract: The Southern Hemisphere VLBI monitoring program TANAMI provides dual-frequency (8 GHz and 22 GHz), milliarcsecond monitoring of extragalactic jets south of -30 degrees declination. The TANAMI sample consists of a combined radio and gamma-ray selected subsample of currently 80 AGN jets, with new gamma-ray bright sources being added upon detections by Fermi/LAT. Supporting programs provide simultaneous multiwavelength coverage of all sources, in order to construct broadband spectral energy distributions (SEDs) of flaring and quiescence source states, as well as a rapid follow-up of high-energy flares. This combined setup allows us to continuously study the spectral and structural evolution of highly energetic extragalactic jets and test correlations in different wavebands, providing crucial information on underlying physical mechanisms. Here, we present jet kinematics of Centaurus A and show preliminary VLBI results on PKS 0625-354 and the time-dependent spectral index image of PKS 0537-441., Comment: 6 pages, Conference Proceedings of "11th European VLBI Network Symposium & Users Meeting", published in Proceedings of Science
Published: 2013

12. TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry

Author: Müller, C., Kadler, M., Ojha, R., Schulz, R., Trüstedt, J., Edwards, P.G., Wilms, J., and Zensus, J.A.
Subjects: Astronomy, Hardware_REGISTER-TRANSFER-LEVELIMPLEMENTATION
Abstract: Contains fulltext : 183530.pdf (Publisher’s version ) (Open Access) 9 p.
Published: 2018

13. ANTARES constrains a blazar origin of two IceCube PeV neutrino events

Author: Adrián Martínez, S., Albert, A., André, M., Anton, G., Ardid, M., Aubert, J. J., Baret, B., Barrios, J., Basa, S., Bertin, V., Biagi, S., Bogazzi, C., Bormuth, R., Bou Cabo, M., Bouwhuis, M. C., Bruijn, R., Brunner, J., Busto, J., Capone, Antonio, Caramete, L., Carr, J., Chiarusi, T., Circella, M., Coniglione, R., Core, L., Costantini, H., Coyle, P., Creusot, A., De Rosa, G., Dekeyser, I., Deschamps, A., DE BONIS, Giulia, Distefano, C., Donzaud, C., Dornic, D., Dorosti, Q., Drouhin, D., Dumas, A., Eberl, T., Enzenhöfer, A., Escoffier, S., Fehn, K., Felis, I., Fermani, Paolo, Folger, F., Fusco, L. A., Galatà, S., Gay, P., Geißelsöder, S., Geyer, K., Giordano, V., Gleixner, A., Gřómez González, J. P., Graf, K., Guillard, G., van Haren, H., Heijboer, A. J., Hello, Y., Hernández Rey, J. J., Herold, B., Herrero, A., Hößl, J., Hofestädt, J., Hugon, C., James, C. W., de Jong, M., Kalekin, O., Katz, U., Kießling, D., Kooijman, P., Kouchner, A., Kulikovskiy, V., Lahmann, R., Lambard, E., Lambard, G., Lefèvre, D., Leonora, E., Loehner, H., Loucatos, S., Mangano, S., Marcelin, M., Margiotta, A., Martínez Mora, J. A., Martini, S., Mathieu, A., Michael, T., Migliozzi, P., Neff, M., Nezri, E., Palioselitis, D., Păvăląs, G. E., Pellegrino, C., Perrina, Chiara, Piattelli, P., Popa, V., Pradier, T., Racca, C., Riccobene, G., Richter, R., Roensch, K., Rostovtsev, A., Saldaña, M., Samtleben, D. F. E., Sánchez Losa, . A., Sanguineti, M., Sapienza, P., Schmid, J., Schnabel, J., Schulte, S., Schüssler, F., Seitz, T., Sieger, C., Spies, A., Spurio, M., Steijger, J. J. M., Stolarczyk, T. h., Taiuti, M., Tamburini, C., Tayalati, Y., Trovato, A., Vallage, B., Vallée, C., Van Elewyck, V., Visser, E., Vivolo, D., Wagner, S., de Wolf, E., Yatkin, K., Yepes, H., Zornoza, J. D., Zúñiga, J., Krauß, F., Kadler, M., Mannheim, . K., Schulz, R., Trüstedt, J., Wilms, J., Ojha, R., Ros, E., Baumgartner, W., Beuchert, T., Blanchard, J., Bürkel, C., Carpenter, B., Edwards, P. G., Eisenacher Glawion, D., Elsässer, D., Fritsch, U., Gehrels, N., Gräfe, C., Großberger, C., Hase, H., Horiuchi, S., Kappes, A., Kreikenbohm, A., Kreykenbohm, I., Langejahn, M., Leiter, K., Litzinger, E., Lovell, J. E. J., Müller, C., Phillips, C., Plötz, C., Quick, J., Steinbring, T., Stevens, J., Thompson, D. J., Tzioumis, A. K., Research unit Nuclear & Hadron Physics, Institut d’Investigació per a la Gestió Integrada de Zones Costaneres (IGIC), Universitat Politècnica de València (UPV), Groupe de Recherche en Physique des Hautes Energies (GRPHE), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut Universitaire de Technologie de Colmar, Laboratory of Applied Bioacoustics (LAB-UPC), Universidad Polytecnica de Cataluña (UPC), Erlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander Universität Erlangen-Nürnberg (FAU), Centre de Physique des Particules de Marseille (CPPM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), AstroParticule et Cosmologie (APC (UMR_7164)), 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), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut méditerranéen d'océanologie (MIO), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Aix Marseille Université (AMU)-Institut de Recherche pour le Développement (IRD), Géoazur (GEOAZUR 7329), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Université Paris-Sud - Paris 11 (UP11), Département de Physique des Particules (ex SPP) (DPP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Pluridisciplinaire Hubert Curien (IPHC), Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), The ANTARES Collaboration, The TANAMI Collaboration, Institut Universitaire de Technologie de Colmar-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), KM3NeT (IHEF, IoP, FNWI), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-IUT de Colmar, Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Aix Marseille Université (AMU)-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)-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), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Département de Physique des Particules (ex SPP) (DPhP), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Adrián Martínez, S., Albert, A., André, M., Anton, G., Ardid, M., Aubert, J. J., Baret, B., Barrios, J., Basa, S., Bertin, V., Biagi, S., Bogazzi, C., Bormuth, R., Bou Cabo, M., Bouwhuis, M. C., Bruijn, R., Brunner, J., Busto, J., Capone, A., Caramete, L., Carr, J., Chiarusi, T., Circella, M., Coniglione, R., Costantini, H., Coyle, P., Creusot, A., DE ROSA, Gianfranca, Dekeyser, I., Deschamps, A., De Bonis, G., Distefano, C., Donzaud, C., Dornic, D., Dorosti, Q., Drouhin, D., Dumas, A., Eberl, T., Enzenhöfer, A., Escoffier, S., Fehn, K., Felis, I., Fermani, P., Folger, F., Fusco, L. A., Galatà, S., Gay, P., Geißelsöder, S., Geyer, K., Giordano, V., Gleixner, A., Gómez González, J. P., Gracia Ruiz, R., Graf, K., van Haren, H., Heijboer, A. J., Hello, Y., Hernández Rey, J. J., Herrero, A., Hößl, J., Hofestädt, J., Hugon, C., W. James, C., de Jong, M., Kalekin, O., Katz, U., Kießling, D., Kooijman, P., Kouchner, A., Kulikovskiy, V., Lahmann, R., Lattuada, D., Lefèvre, D., Leonora, E., Loehner, H., Loucatos, S., Mangano, S., Marcelin, M., Margiotta, A., Martínez Mora, J. A., Martini, S., Mathieu, A., Michael, T., Migliozzi, P., Neff, M., Nezri, E., Palioselitis, D., Păvălaş, G. E., Perrina, C., Piattelli, P., Popa, V., Pradier, T., Racca, C., Riccobene, G., Richter, R., Roensch, K., Rostovtsev, A., Saldaña, M., Samtleben, D. F. E., Sánchez Losa, A., Sanguineti, M., Sapienza, P., Schmid, J., Schnabel, J., Schulte, S., Schüssler, F., Seitz, T., Sieger, C., Spies, A., Spurio, M., Steijger, J. J. M., Stolarczyk, T. h., Taiuti, M., Tamburini, C., Tayalati, Y., Trovato, A., Tselengidou, M., Tönnis, C., Vallage, B., Vallée, C., Van Elewyck, V., Visser, E., Vivolo, Daniele, Wagner, S., de Wolf, E., Yepes, H., Zornoza, J. D., Zúñiga, J., Krauß, F., Kadler, M., Mannheim, K., Schulz, R., Trüstedt, J., Wilms, J., Ojha, R., Ros, E., Baumgartner, W., Beuchert, T., Blanchard, J., Bürkel, C., Carpenter, B., Edwards, P. G., Eisenacher Glawion, D., Elsässer, D., Fritsch, U., Gehrels, N., Gräfe, C., Großberger, C., Hase, H., Horiuchi, S., Kappes, A., Kreikenbohm, A., Kreykenbohm, I., Langejahn, M., Leiter, K., Litzinger, E., Lovell, J. E. J., Müller, C., Phillips, C., Plötz, C., Quick, J., Steinbring, T., Stevens, J., Thompson, D. J., Tzioumis, A. K., Adrian-Martinez, S, Albert, A, Andre, M, Anton, G, Ardid, M, Aubert, Jj, Baret, B, Barrios, J, Basa, S, Bertin, V, Biagi, S, Bogazzi, C, Bormuth, R, Bou-Cabo, M, Bouwhuis, Mc, Brujin, R, Brunner, J, Busto, J, Capone, A, Caramete, L, Cane, J, Chiarusim, T, Circella, M, Coniglione, R, Costantini, H, Coyle, P, Creusot, A, De Rosa, G, Dekeyser, I, Deschamps, A, De Bonis, G, Distefano, C, Donzaud, C, Dornic, D, Dorosti, Q, Drouhin, D, Dumas, A, Eberl, T, Enzenhofer, A, Escoffier, S, Fehn, K, Felis, I, Fermani, P, Folger, F, Fusco, La, Galata, S, Gay, P, Geisselsoder, S, Geyer, K, Giordano, V, Gleixner, A, Gomez-Gonzalez, Jp, Gracia-Ruiz, R, Graf, K, van Haren, H, Heijboer, Aj, Hello, Y, Hernandez-Rey, Jj, Herrero, A, Hossl, J, Hofestadt, J, Hugon, C, James, Cw, de Jong, M, Kalekin, O, Katz, U, Kiessling, D, Kooijman, P, Kouchner, A, Kulikovskiy, V, Lahmann, R, Lattuada, D, Lefevre, D, Leonora, E, Loehner, H, Loucatos, S, Mangano, S, Marcelin, M, Margiotta, A, Martinez-Mora, Ja, Martini, S, Mathieu, A, Michael, T, Migliozzi, P, Neff, M, Nezri, E, Palioselitis, D, Pavalas, Ge, Perrina, C, Piattelli, P, Popa, V, Pradier, T, Racca, C, Riccobene, G, Richter, R, Roensch, K, Rostovtsev, A, Saldana, M, Samtleben, Dfe, Sanchez-Losa, A, Sanguineti, M, Sapienza, P, Schmid, J, Schnabel, J, Schulte, S, Schussler, F, Seitz, T, Sieger, C, Spies, A, Spurio, M, Steijger, Jjm, Stolarczyk, T, Taiuti, M, Tamburini, C, Tayalati, Y, Trovato, A, Tselengidou, M, Tonnis, C, Vallage, B, Vallee, C, Van Elewyck, V, Visser, E, Vivolo, D, Wagner, S, de Wolf, E, Yepes, H, Zornoza, Jd, Zuniga, J, Krauss, F, Kadler, M, Mannheim, K, Schulz, R, Trustedt, J, Wilms, J, Ojha, R, Ros, E, Baumgartner, W, Beuchert, T, Blanchard, J, Burke, C, Carpenter, B, Edwards, Pg, Glawion, De, Elsasser, D, Fritsch, U, Gehrels, N, Grafe, C, Grossberger, C, Hase, H, Horiuchi, S, Kappes, A, Kreikenbohm, A, Kreykenbohm, I, Langejahn, M, Leiter, K, Litzinger, E, Lovell, Jej, Muller, C, Phillips, C, Plotz, C, Quick, J, Steinbring, T, Stevens, J, Thompson, Dj, Tzioumis, Ak, 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), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Adrián-Martínez, S, Aubert, J.-J., Bou-Cabo, M., Bouwhuis, M.C., De Rosa, G., Fusco, L.A., Gómez-González, J.P., Gracia-Ruiz, R., Van Haren, H., Heijboer, A.J., Hernández-Rey, J.J., James, C.W., De Jong, M., Martínez-Mora, J.A., Pəvəlaş, G.E., Samtleben, D.F.E., Sánchez-Losa, A., Steijger, J.J.M., Stolarczyk, Th., Vivolo, D., De Wolf, E., Zornoza, J.D., Edwards, P.G., Lovell, J.E.J., Thompson, D.J., Tzioumis, A.K., Centre Tecnològic de Vilanova i la Geltrú, Universitat Politècnica de Catalunya. LAB - Laboratori d'Aplicacions Bioacústiques, Adrian-Martinez, S., Andre, M., Aubert, J. -J., Enzenhofer, A., Galata, S., Geisselsoder, S., Gomez-Gonzalez, J. P., Hernandez-Rey, J. J., Hossl, J., Hofestadt, J., James, C. W., Kiessling, D., Lefevre, D., Martinez-Mora, J. A., Pevelas, G. E., Saldana, M., Sanchez-Losa, A., Schussler, F., Tonnis, C., Vallee, C., Zuniga, J., Krauss, F., Trustedt, J., Burkel, C., Elsasser, D., Grafe, C., Grossberger, C., Muller, C., and Plotz, C.
Subjects: Astrofísica, active [Galaxies], Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Flux, FOS: Physical sciences, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 7. Clean energy, 01 natural sciences, Spectral line, 0103 physical sciences, Neutrino, Galaxies: active, Neutrinos, Quasars: general, Neutrins, Blazar, 010303 astronomy & astrophysics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Muon, Cosmologia, 010308 nuclear & particles physics, Física, Astronomy and Astrophysics, general [Quasars], Astronomy and Astrophysic, Neutrino astrophysics, Quasars general, Cosmology, neutrinos – galaxies: active – quasars: general, Space and Planetary Science, Galaxies active, Col·lisions (Física nuclear), Física::Astronomia i astrofísica [Àrees temàtiques de la UPC], FISICA APLICADA, Física nuclear, Astrophysics - High Energy Astrophysical Phenomena, MATEMATICA APLICADA, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Event (particle physics)
Abstract: Context. The source(s) of the neutrino excess reported by the IceCube Collaboration is unknown. The TANAMI Collaboration recently reported on the multiwavelength emission of six bright, variable blazars which are positionally coincident with two of the most energetic IceCube events. Objects like these are prime candidates to be the source of the highest-energy cosmic rays, and thus of associated neutrino emission. Aims. We present an analysis of neutrino emission from the six blazars using observations with the ANTARES neutrino telescope. Methods. The standard methods of the ANTARES candidate list search are applied to six years of data to search for an excess of muons and hence their neutrino progenitors from the directions of the six blazars described by the TANAMI Collaboration, and which are possibly associated with two IceCube events. Monte Carlo simulations of the detector response to both signal and background particle fluxes are used to estimate the sensitivity of this analysis for different possible source neutrino spectra. A maximum-likelihood approach, using the reconstructed energies and arrival directions of through-going muons, is used to identify events with properties consistent with a blazar origin. Results. Both blazars predicted to be the most neutrino-bright in the TANAMI sample (1653-329 and 1714-336) have a signal flux fitted by the likelihood analysis corresponding to approximately one event. This observation is consistent with the blazar-origin hypothesis of the IceCube event IC 14 for a broad range of blazar spectra, although an atmospheric origin cannot be excluded. No ANTARES events are observed from any of the other four blazars, including the three associated with IceCube event IC20. This excludes at a 90% confidence level the possibility that this event was produced by these blazars unless the neutrino spectrum is flatter than -2.4., The authors would like to thank A. Kappes for helpful discussions regarding the IceCube analysis. The ANTARES authors acknowledge the financial support of the funding agencies: Centre National de la Recherche Scientifique (CNRS), Commissariat a l'enegie atomique et aux energies alternatives (CEA), Commission Europeenne (FEDER fund and Marie Curie Program), Region Alsace (contrat CPER), Region Provence-Alpes-Cote d'Azur, Departement du Var and Ville de La Seyne-sur-Mer, France; Bundesministerium fur Bildung und Forschung (BMBF), Germany; Istituto Nazionale di Fisica Nucleare (INFN), Italy; Stichting voor Fundamenteel Onderzoek der Materie (FOM), Nederlandse organisatie voor Wetenschappelijk Onderzoek (NWO), the Netherlands; Council of the President of the Russian Federation for young scientists and leading scientific schools supporting grants, Russia; National Authority for Scientific Research (ANCS), Romania; Ministerio de Ciencia e Innovacion (MICINN), Prometeo of Generalitat Valenciana and MultiDark, Spain; Agence de l'Oriental and CNRST, Morocco. We also acknowledge the technical support of Ifremer, AIM and Foselev Marine for the sea operation and the CC-IN2P3 for the computing facilities. The TANAMI authors acknowledge support and partial funding by the Deutsche Forschungsgemeinschaft grant WI 1860-10/1 (TANAMI) and GRK 1147, Deutsches Zentrum fur Luft- und Raumfahrt grant 50 OR1311/50 OR1303/50 OR1401, the Spanish MINECO project AYA2012-38491-C02-01, the Generalitat Valenciana project PROMETEOII/2014/057, the COST MP0905 action "Black Holes in a Violent Universe" and the Helmholtz Alliance for Astroparticle Physics (HAP).
Published: 2015
Full Text: View/download PDF

14. TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry

Author: Müller, C., primary, Kadler, M., additional, Ojha, R., additional, Schulz, R., additional, Trüstedt, J., additional, Edwards, P. G., additional, Ros, E., additional, Carpenter, B., additional, Angioni, R., additional, Blanchard, J., additional, Böck, M., additional, Burd, P. R., additional, Dörr, M., additional, Dutka, M. S., additional, Eberl, T., additional, Gulyaev, S., additional, Hase, H., additional, Horiuchi, S., additional, Katz, U., additional, Krauß, F., additional, Lovell, J. E. J., additional, Natusch, T., additional, Nesci, R., additional, Phillips, C., additional, Plötz, C., additional, Pursimo, T., additional, Quick, J. F. H., additional, Stevens, J., additional, Thompson, D. J., additional, Tingay, S. J., additional, Tzioumis, A. K., additional, Weston, S., additional, Wilms, J., additional, and Zensus, J. A., additional
Published: 2018
Full Text: View/download PDF

15. TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sources

Author: Müller, C., Kadler, M., Ojha, R., Schulz, R., Trüstedt, J., Edwards, P., Ros, E., Carpenter, B., Angioni, R., Blanchard, J., Böck, M., Burd, P., Dörr, M., Dutka, M., Eberl, T., Gulyaev, S., Hase, H., Horiuchi, S., Katz, U., Krauß, F., Lovell, J., Natusch, T., Nesci, R., Phillips, C., Plötz, C., Pursimo, T., Quick, J., Stevens, J., Thompson, D., Tingay, Steven, Tzioumis, A., Weston, S., Wilms, J., Zensus, J., Müller, C., Kadler, M., Ojha, R., Schulz, R., Trüstedt, J., Edwards, P., Ros, E., Carpenter, B., Angioni, R., Blanchard, J., Böck, M., Burd, P., Dörr, M., Dutka, M., Eberl, T., Gulyaev, S., Hase, H., Horiuchi, S., Katz, U., Krauß, F., Lovell, J., Natusch, T., Nesci, R., Phillips, C., Plötz, C., Pursimo, T., Quick, J., Stevens, J., Thompson, D., Tingay, Steven, Tzioumis, A., Weston, S., Wilms, J., and Zensus, J.
Abstract: TANAMI is a multiwavelength program monitoring active galactic nuclei (AGN) south of -30deg declination including high-resolution Very Long Baseline Interferometry (VLBI) imaging, radio, optical/UV, X-ray and gamma-ray studies. We have previously published first-epoch 8.4GHz VLBI images of the parsec-scale structure of the initial sample. In this paper, we present images of 39 additional sources. The full sample comprises most of the radio- and gamma-ray brightest AGN in the southern quarter of the sky, overlapping with the region from which high-energy (>100TeV) neutrino events have been found. We characterize the parsec-scale radio properties of the jets and compare with the quasi-simultaneous Fermi/LAT gamma-ray data. Furthermore, we study the jet properties of sources which are in positional coincidence with high-energy neutrino events as compared to the full sample. We test the positional agreement of high-energy neutrino events with various AGN samples. Our observations yield the first images of many jets below -30deg declination at milliarcsecond resolution. We find that gamma-ray loud TANAMI sources tend to be more compact on parsec-scales and have higher core brightness temperatures than gamma-ray faint jets, indicating higher Doppler factors. No significant structural difference is found between sources in positional coincidence with high-energy neutrino events and other TANAMI jets. The 22 gamma-ray brightest AGN in the TANAMI sky show only a weak positional agreement with high-energy neutrinos demonstrating that the >100TeV IceCube signal is not simply dominated by a small number of the $\gamma$-ray brightest blazars. Instead, a larger number of sources have to contribute to the signal with each individual source having only a small Poisson probability for producing an event in multi-year integrations of current neutrino detectors.
Published: 2018

16. The LOFAR Multifrequency Snapshot Sky Survey (MSSS)

Author: Heald, G., Pizzo, R., Orrú, E., Breton, R., Carbone, D., Ferrari, C., Hardcastle, M., Jurusik, W., Macario, G., Mulcahy, D., Rafferty, D., Asgekar, A., Brentjens, M., Fallows, R., Frieswijk, W., Toribio, M., Adebahr, B., Arts, M., Bell, M., Bonafede, A., Bray, J., Broderick, J., Cantwell, T., Carroll, P., Cendes, Y., Clarke, A., Croston, J., Daiboo, S., de Gasperin, F., Gregson, J., Harwood, J., Hassall, T., Heesen, V., Horneffer, A., van der Horst, A., Iacobelli, M., Jelić, V., Jones, D., Kant, D., Kokotanekov, G., Martin, P., McKean, J., Morabito, L., Nikiel-Wroczyński, B., Offringa, A., Pandey, V., Pandey-Pommier, M., Pietka, M., Pratley, L., Riseley, C., Rowlinson, A., Sabater, J., Scaife, A., Scheers, L., Sendlinger, K., Shulevski, A., Sipior, M., Sobey, C., Stewart, A., Stroe, A., Swinbank, J., Tasse, C., Trüstedt, J., Varenius, E., van Velzen, S., Vilchez, N., van Weeren, R., Wijnholds, S., Williams, W., de Bruyn, A., Nijboer, R., Wise, M., Alexov, A., Anderson, J., Avruch, I., Beck, R., van Bemmel, I., Bentum, M., Bernardi, G., Best, P., Breitling, F., Brouw, W., Brüggen, M., Butcher, H., Ciardi, B., Conway, J., de Geus, E., de Jong, A., de Vos, M., Deller, A., Dettmar, R., Duscha, S., Eislöffel, J., Engels, D., Falcke, H., Fender, R., Garrett, M., Grießmeier, J., Gunst, A., Hamaker, J., Hessels, J., Hoeft, M., Hörandel, J., Holties, H., Intema, H., Jackson, N., Jütte, E., Karastergiou, A., Klijn, W., Kondratiev, V., Koopmans, L., Kuniyoshi, M., Kuper, G., Law, C., van Leeuwen, J., Loose, M., Maat, P., Markoff, S., McFadden, R., McKay-Bukowski, D., Mevius, M., Miller-Jones, J., Morganti, R., Munk, H., Nelles, A., Noordam, J., Norden, M., Paas, H., Polatidis, A., Reich, W., Renting, A., Röttgering, H., Schoenmakers, A., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B., Steinmetz, M., Tagger, M., Tang, Y., ter Veen, S., Thoudam, S., Vermeulen, R., Vocks, C., Vogt, C., Wijers, R., Wucknitz, O., Yatawatta, S., and Zarka, P.
Abstract: We present the Multifrequency Snapshot Sky Survey (MSSS), the first northern-sky Low Frequency Array (LOFAR) imaging survey. In this introductory paper, we first describe in detail the motivation and design of the survey. Compared to previous radio surveys, MSSS is exceptional due to its intrinsic multifrequency nature providing information about the spectral properties of the detected sources over more than two octaves (from 30 to 160 MHz). The broadband frequency coverage, together with the fast survey speed generated by LOFAR’s multibeaming capabilities, make MSSS the first survey of the sort anticipated to be carried out with the forthcoming Square Kilometre Array (SKA). Two of the sixteen frequency bands included in the survey were chosen to exactly overlap the frequency coverage of large-area Very Large Array (VLA) and Giant Metrewave Radio Telescope (GMRT) surveys at 74 MHz and 151 MHz respectively. The survey performance is illustrated within the MSSS Verification Field (MVF), a region of 100 square degrees centered at (α,δ)J2000 = (15h,69°). The MSSS results from the MVF are compared with previous radio survey catalogs. We assess the flux and astrometric uncertainties in the catalog, as well as the completeness and reliability considering our source finding strategy. We determine the 90% completeness levels within the MVF to be 100 mJy at 135 MHz with 108" resolution, and 550 mJy at 50 MHz with 166" resolution. Images and catalogs for the full survey, expected to contain 150,000–200,000 sources, will be released to a public web server. We outline the plans for the ongoing production of the final survey products, and the ultimate public release of images and source catalogs.
Published: 2015

17. The TANAMI Multiwavelength Program: Dynamic spectral energy distributions of southern blazars⋆

Author: Krauß, F., Wilms, J., Kadler, M., Ojha, R., Schulz, R., Trüstedt, J., Edwards, P.G., Stevens, J., Ros, E., Baumgartner, W., Beuchert, T., Blanchard, J., Buson, S., Carpenter, B., Dauser, T., Falkner, S., Gehrels, N., Gräfe, C., Gulyaev, S., Hase, H., Horiuchi, S., Kreikenbohm, A., Kreykenbohm, I., Langejahn, M., Leiter, K., Lovell, J.E.J., Müller, C., Natusch, T., Nesci, R., Pursimo, T., Phillips, C., Plötz, C., Quick, J., Tzioumis, A.K., Weston, S., Krauß, F., Wilms, J., Kadler, M., Ojha, R., Schulz, R., Trüstedt, J., Edwards, P.G., Stevens, J., Ros, E., Baumgartner, W., Beuchert, T., Blanchard, J., Buson, S., Carpenter, B., Dauser, T., Falkner, S., Gehrels, N., Gräfe, C., Gulyaev, S., Hase, H., Horiuchi, S., Kreikenbohm, A., Kreykenbohm, I., Langejahn, M., Leiter, K., Lovell, J.E.J., Müller, C., Natusch, T., Nesci, R., Pursimo, T., Phillips, C., Plötz, C., Quick, J., Tzioumis, A.K., and Weston, S.
Abstract: Contains fulltext : 159678.pdf (preprint version ) (Open Access)
Published: 2016

18. The TANAMI Multiwavelength Program: Dynamic spectral energy distributions of southern blazars

Author: Krauß, F., primary, Wilms, J., additional, Kadler, M., additional, Ojha, R., additional, Schulz, R., additional, Trüstedt, J., additional, Edwards, P. G., additional, Stevens, J., additional, Ros, E., additional, Baumgartner, W., additional, Beuchert, T., additional, Blanchard, J., additional, Buson, S., additional, Carpenter, B., additional, Dauser, T., additional, Falkner, S., additional, Gehrels, N., additional, Gräfe, C., additional, Gulyaev, S., additional, Hase, H., additional, Horiuchi, S., additional, Kreikenbohm, A., additional, Kreykenbohm, I., additional, Langejahn, M., additional, Leiter, K., additional, Lovell, J. E. J., additional, Müller, C., additional, Natusch, T., additional, Nesci, R., additional, Pursimo, T., additional, Phillips, C., additional, Plötz, C., additional, Quick, J., additional, Tzioumis, A. K., additional, and Weston, S., additional
Published: 2016
Full Text: View/download PDF

19. Coincidence of a high-fluence blazar outburst with a PeV-energy neutrino event

Author: Kadler, M., primary, Krauß, F., additional, Mannheim, K., additional, Ojha, R., additional, Müller, C., additional, Schulz, R., additional, Anton, G., additional, Baumgartner, W., additional, Beuchert, T., additional, Buson, S., additional, Carpenter, B., additional, Eberl, T., additional, Edwards, P. G., additional, Eisenacher Glawion, D., additional, Elsässer, D., additional, Gehrels, N., additional, Gräfe, C., additional, Gulyaev, S., additional, Hase, H., additional, Horiuchi, S., additional, James, C. W., additional, Kappes, A., additional, Katz, U., additional, Kreikenbohm, A., additional, Kreter, M., additional, Kreykenbohm, I., additional, Langejahn, M., additional, Leiter, K., additional, Litzinger, E., additional, Longo, F., additional, Lovell, J. E. J., additional, McEnery, J., additional, Natusch, T., additional, Phillips, C., additional, Plötz, C., additional, Quick, J., additional, Ros, E., additional, Stecker, F. W., additional, Steinbring, T., additional, Stevens, J., additional, Thompson, D. J., additional, Trüstedt, J., additional, Tzioumis, A. K., additional, Weston, S., additional, Wilms, J., additional, and Zensus, J. A., additional
Published: 2016
Full Text: View/download PDF

20. The gamma-ray emitting radio-loud narrow-line Seyfert 1 galaxy PKS 2004−447

Author: Schulz, R., primary, Kreikenbohm, A., additional, Kadler, M., additional, Ojha, R., additional, Ros, E., additional, Stevens, J., additional, Edwards, P. G., additional, Carpenter, B., additional, Elsässer, D., additional, Gehrels, N., additional, Großberger, C., additional, Hase, H., additional, Horiuchi, S., additional, Lovell, J. E. J., additional, Mannheim, K., additional, Markowitz, A., additional, Müller, C., additional, Phillips, C., additional, Plötz, C., additional, Quick, J., additional, Trüstedt, J., additional, Tzioumis, A. K., additional, and Wilms, J., additional
Published: 2016
Full Text: View/download PDF

21. The LOFAR Multifrequency Snapshot Sky Survey (MSSS): I. Survey description and first results

Author: Heald, G., Pizzo, R., Orrú, E., Breton, R., Carbone, D., Ferrari, C., Hardcastle, M., Jurusik, W., Macario, G., Mulcahy, D., Rafferty, D., Asgekar, A., Brentjens, M., Fallows, R., Frieswijk, W., Toribio, M., Adebahr, B., Arts, M., Bell, M., Bonafede, A., Bray, J., Broderick, J., Cantwell, T., Carroll, P., Cendes, Y., Clarke, A., Croston, J., Daiboo, S., de Gasperin, F., Gregson, J., Harwood, J., Hassall, T., Heesen, V., Horneffer, A., van der Horst, A., Iacobelli, M., Jelic, V., Jones, D., Kant, D., Kokotanekov, G., Martin, P., McKean, J., Morabito, L., Nikiel-Wroczynski, B., Offringa, A., Pandey, V., Pandey-Pommier, M., Pietka, M., Pratley, L., Riseley, C., Rowlinson, A., Sabater, J., Scaife, A., Scheers, L., Sendlinger, K., Shulevski, A., Sipior, M., Sobey, Charlotte Anne, Stewart, A., Stroe, A., Swinbank, J., Tasse, C., Trüstedt, J., Varenius, E., van Velzen, S., Vilchez, N., van Weeren, R., Wijnholds, S., Williams, W., De Bruyn, A., Nijboer, R., Wise, M., Alexov, A., Anderson, J., Avruch, I., Beck, R., van Bemmel, I., Bentum, M., Bernardi, G., Best, P., Breitling, F., Brouw, W., Brüggen, M., Butcher, H., Ciardi, B., Conway, J., de Geus, E., de Jong, A., de Vos, M., Deller, A., Dettmar, R., Duscha, S., Eislöffel, J., Engels, D., Falcke, J., Fender, R., Garrett, M., Grießmeier, J., Gunst, A., Hamaker, J., Hessels, J., Hoeft, J., Hörandel, J., Holties, H., Intema, H., Jackson, N., Jütte, E., Karastergiou, A., Klijn, W., Kondratiev, V., Koopmans, L., Kuniyoshi, M., Kuper, G., Law, C., van Leeuwen, J., Loose, M., Markoff, S., McFadden, R., McKay-Bukowski, D., Mevius, M., Miller-Jones, James, Morganti, R., Munk, H., Noordam, J., Norden, M., Pass, H., Polatidis, A., Reich, W., Renting, A., Röttgering, H., Schoenmakers, A., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B., Steinmetz, M., Tagger, M., Tang, Y., ter Veen, S., Thoudam, S., Vermeulen, R., Vocks, C., Vogt, C., Wijers, R., Wucknitz, O., Yatawatta, S., Zarka, P., Nelles, A., Maat, P., Heald, G., Pizzo, R., Orrú, E., Breton, R., Carbone, D., Ferrari, C., Hardcastle, M., Jurusik, W., Macario, G., Mulcahy, D., Rafferty, D., Asgekar, A., Brentjens, M., Fallows, R., Frieswijk, W., Toribio, M., Adebahr, B., Arts, M., Bell, M., Bonafede, A., Bray, J., Broderick, J., Cantwell, T., Carroll, P., Cendes, Y., Clarke, A., Croston, J., Daiboo, S., de Gasperin, F., Gregson, J., Harwood, J., Hassall, T., Heesen, V., Horneffer, A., van der Horst, A., Iacobelli, M., Jelic, V., Jones, D., Kant, D., Kokotanekov, G., Martin, P., McKean, J., Morabito, L., Nikiel-Wroczynski, B., Offringa, A., Pandey, V., Pandey-Pommier, M., Pietka, M., Pratley, L., Riseley, C., Rowlinson, A., Sabater, J., Scaife, A., Scheers, L., Sendlinger, K., Shulevski, A., Sipior, M., Sobey, Charlotte Anne, Stewart, A., Stroe, A., Swinbank, J., Tasse, C., Trüstedt, J., Varenius, E., van Velzen, S., Vilchez, N., van Weeren, R., Wijnholds, S., Williams, W., De Bruyn, A., Nijboer, R., Wise, M., Alexov, A., Anderson, J., Avruch, I., Beck, R., van Bemmel, I., Bentum, M., Bernardi, G., Best, P., Breitling, F., Brouw, W., Brüggen, M., Butcher, H., Ciardi, B., Conway, J., de Geus, E., de Jong, A., de Vos, M., Deller, A., Dettmar, R., Duscha, S., Eislöffel, J., Engels, D., Falcke, J., Fender, R., Garrett, M., Grießmeier, J., Gunst, A., Hamaker, J., Hessels, J., Hoeft, J., Hörandel, J., Holties, H., Intema, H., Jackson, N., Jütte, E., Karastergiou, A., Klijn, W., Kondratiev, V., Koopmans, L., Kuniyoshi, M., Kuper, G., Law, C., van Leeuwen, J., Loose, M., Markoff, S., McFadden, R., McKay-Bukowski, D., Mevius, M., Miller-Jones, James, Morganti, R., Munk, H., Noordam, J., Norden, M., Pass, H., Polatidis, A., Reich, W., Renting, A., Röttgering, H., Schoenmakers, A., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B., Steinmetz, M., Tagger, M., Tang, Y., ter Veen, S., Thoudam, S., Vermeulen, R., Vocks, C., Vogt, C., Wijers, R., Wucknitz, O., Yatawatta, S., Zarka, P., Nelles, A., and Maat, P.
Abstract: We present the Multifrequency Snapshot Sky Survey (MSSS), the first northern-sky Low Frequency Array (LOFAR) imaging survey. In this introductory paper, we first describe in detail the motivation and design of the survey. Compared to previous radio surveys, MSSS is exceptional due to its intrinsic multifrequency nature providing information about the spectral properties of the detected sources over more than two octaves (from 30 to 160 MHz). The broadband frequency coverage, together with the fast survey speed generated by LOFAR's multibeaming capabilities, make MSSS the first survey of the sort anticipated to be carried out with the forthcoming Square Kilometre Array (SKA). Two of the sixteen frequency bands included in the survey were chosen to exactly overlap the frequency coverage of large-area Very Large Array (VLA) and Giant Metrewave Radio Telescope (GMRT) surveys at 74 MHz and 151 MHz respectively. The survey performance is illustrated within the MSSS Verification Field (MVF), a region of 100 square degrees centered at (a,d)J2000 = (15h,69°). The MSSS results from the MVF are compared with previous radio survey catalogs. We assess the flux and astrometric uncertainties in the catalog, as well as the completeness and reliability considering our source finding strategy. We determine the 90% completeness levels within the MVF to be 100 mJy at 135 MHz with 108? resolution, and 550 mJy at 50 MHz with 166? resolution. Images and catalogs for the full survey, expected to contain 150 000-200 000 sources, will be released to a public web server. We outline the plans for the ongoing production of the final survey products, and the ultimate public release of images and source catalogs.
Published: 2015

22. The gamma-ray emitting radio-loud narrow-line Seyfert 1 galaxy PKS 2004−447

Author: Kreikenbohm, A., primary, Schulz, R., additional, Kadler, M., additional, Wilms, J., additional, Markowitz, A., additional, Chang, C. S., additional, Carpenter, B., additional, Elsässer, D., additional, Gehrels, N., additional, Mannheim, K., additional, Müller, C., additional, Ojha, R., additional, Ros, E., additional, and Trüstedt, J., additional
Published: 2015
Full Text: View/download PDF

23. The LOFAR Multifrequency Snapshot Sky Survey (MSSS)

Author: Heald, G. H., primary, Pizzo, R. F., additional, Orrú, E., additional, Breton, R. P., additional, Carbone, D., additional, Ferrari, C., additional, Hardcastle, M. J., additional, Jurusik, W., additional, Macario, G., additional, Mulcahy, D., additional, Rafferty, D., additional, Asgekar, A., additional, Brentjens, M., additional, Fallows, R. A., additional, Frieswijk, W., additional, Toribio, M. C., additional, Adebahr, B., additional, Arts, M., additional, Bell, M. R., additional, Bonafede, A., additional, Bray, J., additional, Broderick, J., additional, Cantwell, T., additional, Carroll, P., additional, Cendes, Y., additional, Clarke, A. O., additional, Croston, J., additional, Daiboo, S., additional, de Gasperin, F., additional, Gregson, J., additional, Harwood, J., additional, Hassall, T., additional, Heesen, V., additional, Horneffer, A., additional, van der Horst, A. J., additional, Iacobelli, M., additional, Jelić, V., additional, Jones, D., additional, Kant, D., additional, Kokotanekov, G., additional, Martin, P., additional, McKean, J. P., additional, Morabito, L. K., additional, Nikiel-Wroczyński, B., additional, Offringa, A., additional, Pandey, V. N., additional, Pandey-Pommier, M., additional, Pietka, M., additional, Pratley, L., additional, Riseley, C., additional, Rowlinson, A., additional, Sabater, J., additional, Scaife, A. M. M., additional, Scheers, L. H. A., additional, Sendlinger, K., additional, Shulevski, A., additional, Sipior, M., additional, Sobey, C., additional, Stewart, A. J., additional, Stroe, A., additional, Swinbank, J., additional, Tasse, C., additional, Trüstedt, J., additional, Varenius, E., additional, van Velzen, S., additional, Vilchez, N., additional, van Weeren, R. J., additional, Wijnholds, S., additional, Williams, W. L., additional, de Bruyn, A. G., additional, Nijboer, R., additional, Wise, M., additional, Alexov, A., additional, Anderson, J., additional, Avruch, I. M., additional, Beck, R., additional, Bell, M. E., additional, van Bemmel, I., additional, Bentum, M. J., additional, Bernardi, G., additional, Best, P., additional, Breitling, F., additional, Brouw, W. N., additional, Brüggen, M., additional, Butcher, H. R., additional, Ciardi, B., additional, Conway, J. E., additional, de Geus, E., additional, de Jong, A., additional, de Vos, M., additional, Deller, A., additional, Dettmar, R.-J., additional, Duscha, S., additional, Eislöffel, J., additional, Engels, D., additional, Falcke, H., additional, Fender, R., additional, Garrett, M. A., additional, Grießmeier, J., additional, Gunst, A. W., additional, Hamaker, J. P., additional, Hessels, J. W. T., additional, Hoeft, M., additional, Hörandel, J., additional, Holties, H. A., additional, Intema, H., additional, Jackson, N. J., additional, Jütte, E., additional, Karastergiou, A., additional, Klijn, W. F. A., additional, Kondratiev, V. I., additional, Koopmans, L. V. E., additional, Kuniyoshi, M., additional, Kuper, G., additional, Law, C., additional, van Leeuwen, J., additional, Loose, M., additional, Maat, P., additional, Markoff, S., additional, McFadden, R., additional, McKay-Bukowski, D., additional, Mevius, M., additional, Miller-Jones, J. C. A., additional, Morganti, R., additional, Munk, H., additional, Nelles, A., additional, Noordam, J. E., additional, Norden, M. J., additional, Paas, H., additional, Polatidis, A. G., additional, Reich, W., additional, Renting, A., additional, Röttgering, H., additional, Schoenmakers, A., additional, Schwarz, D., additional, Sluman, J., additional, Smirnov, O., additional, Stappers, B. W., additional, Steinmetz, M., additional, Tagger, M., additional, Tang, Y., additional, ter Veen, S., additional, Thoudam, S., additional, Vermeulen, R., additional, Vocks, C., additional, Vogt, C., additional, Wijers, R. A. M. J., additional, Wucknitz, O., additional, Yatawatta, S., additional, and Zarka, P., additional
Published: 2015
Full Text: View/download PDF

24. The unusual multiwavelength properties of the gamma-ray source PMNJ1603-4904

Author: Muller, C., Kadler, M., Ojha, R., Böck, M., Krauß, F., Taylor, G., Wilms, J., Blanchard, J., Carpenter, B., Dauser, T., Dutka, M., Edwards, P., Gehrels, N., Großberger, C., Hase, H., Horiuchi, S., Kreikenbohm, A., Lovell, J., McConville, W., Phillips, C., Plötz, C., Pursimo, T., Quick, J., Ros, E., Schulz, R., Stevens, J., Tingay, Steven, Trüstedt, J., Tzioumis, A., Zensus, J., Muller, C., Kadler, M., Ojha, R., Böck, M., Krauß, F., Taylor, G., Wilms, J., Blanchard, J., Carpenter, B., Dauser, T., Dutka, M., Edwards, P., Gehrels, N., Großberger, C., Hase, H., Horiuchi, S., Kreikenbohm, A., Lovell, J., McConville, W., Phillips, C., Plötz, C., Pursimo, T., Quick, J., Ros, E., Schulz, R., Stevens, J., Tingay, Steven, Trüstedt, J., Tzioumis, A., and Zensus, J.
Abstract: Context. We investigate the nature and classification of PMNJ1603-4904, a bright radio source close to the Galactic plane, which is associated with one of the brightest hard-spectrum ?-ray sources detected by Fermi/LAT. It has previously been classified as a lowpeaked BL Lac object based on its broadband emission and the absence of optical emission lines. Optical measurements, however, suffer strongly from extinction and the absence of pronounced short-time ?-ray variability over years of monitoring is unusual for a blazar. Aims. In this paper, we are combining new and archival multiwavelength data of PMNJ1603-4904 in order to reconsider the classification and nature of this unusual ?-ray source. Methods. For the first time, we study the radio morphology of PMNJ1603-4904 at 8.4GHz and 22.3GHz, and its spectral properties on milliarcsecond scales, based on VLBI observations from the TANAMI program.We combine the resulting images with multiwavelength data in the radio, IR, optical/UV, X-ray, and ?-ray regimes. Results. PMNJ1603-4904 shows a symmetric brightness distribution at 8.4 GHz on milliarcsecond scales, with the brightest, and most compact component in the center of the emission region. The morphology is reminiscent of a compact symmetric object (CSO). Such objects, thought to be young radio galaxies, have been predicted to produce ?-ray emission but have not been detected as a class by the Fermi ?-ray telescope so far. Sparse (u, v)-coverage at 22.3GHz prevents an unambiguous modeling of the source morphology at this higher frequency. Moreover, infrared measurements reveal an excess in the spectral energy distribution (SED), which can be modeled with a blackbody with a temperature of about 1600 K, and which is usually not present in blazar SEDs. Conclusions. The TANAMI VLBI data and the shape of the broadband SED challenge the current blazar classification of one of the brightest ?-ray sources in the sky. PMNJ1603-4904 seems to be either a highly peculiar BL L
Published: 2014

25. TANAMI monitoring of Centaurus A: The complex dynamics in the inner parsec of an extragalactic jet

Author: Müller, C., primary, Kadler, M., additional, Ojha, R., additional, Perucho, M., additional, Großberger, C., additional, Ros, E., additional, Wilms, J., additional, Blanchard, J., additional, Böck, M., additional, Carpenter, B., additional, Dutka, M., additional, Edwards, P. G., additional, Hase, H., additional, Horiuchi, S., additional, Kreikenbohm, A., additional, Lovell, J. E. J., additional, Markowitz, A., additional, Phillips, C., additional, Plötz, C., additional, Pursimo, T., additional, Quick, J., additional, Rothschild, R., additional, Schulz, R., additional, Steinbring, T., additional, Stevens, J., additional, Trüstedt, J., additional, and Tzioumis, A. K., additional
Published: 2014
Full Text: View/download PDF

26. TANAMI blazars in the IceCube PeV-neutrino fields

Author: Krauß, F., primary, Kadler, M., additional, Mannheim, K., additional, Schulz, R., additional, Trüstedt, J., additional, Wilms, J., additional, Ojha, R., additional, Ros, E., additional, Anton, G., additional, Baumgartner, W., additional, Beuchert, T., additional, Blanchard, J., additional, Bürkel, C., additional, Carpenter, B., additional, Eberl, T., additional, Edwards, P. G., additional, Eisenacher, D., additional, Elsässer, D., additional, Fehn, K., additional, Fritsch, U., additional, Gehrels, N., additional, Gräfe, C., additional, Großberger, C., additional, Hase, H., additional, Horiuchi, S., additional, James, C., additional, Kappes, A., additional, Katz, U., additional, Kreikenbohm, A., additional, Kreykenbohm, I., additional, Langejahn, M., additional, Leiter, K., additional, Litzinger, E., additional, Lovell, J. E. J., additional, Müller, C., additional, Phillips, C., additional, Plötz, C., additional, Quick, J., additional, Steinbring, T., additional, Stevens, J., additional, Thompson, D. J., additional, and Tzioumis, A. K., additional
Published: 2014
Full Text: View/download PDF

27. The unusual multiwavelength properties of the gamma-ray source PMN J1603−4904

Author: Müller, Cornelia, primary, Kadler, M., additional, Ojha, R., additional, Böck, M., additional, Krauß, F., additional, Taylor, G. B., additional, Wilms, J., additional, Blanchard, J., additional, Carpenter, B., additional, Dauser, T., additional, Dutka, M., additional, Edwards, P. G., additional, Gehrels, N., additional, Großberger, C., additional, Hase, H., additional, Horiuchi, S., additional, Kreikenbohm, A., additional, Lovell, J. E. J., additional, McConville, W., additional, Phillips, C., additional, Plötz, C., additional, Pursimo, T., additional, Quick, J., additional, Ros, E., additional, Schulz, R., additional, Stevens, J., additional, Tingay, S. J., additional, Trüstedt, J., additional, Tzioumis, A. K., additional, and Zensus, J. A., additional
Published: 2014
Full Text: View/download PDF

28. The EVN view of the highly variable TeV active galaxy IC 310

Author: Schulz, R., Matthias Kadler, Ros, E., Eisenacher Glawion, D., Bach, U., Elsässer, D., Grossberger, C., Kreykenbohm, I., Mannheim, K., Müller, C., Trüstedt, J., and Wilms, J.
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::Galaxy Astrophysics
Abstract: Very-high-energy $\gamma$-ray observations of the active galaxy IC 310 with the MAGIC telescopes have revealed fast variability with doubling time scales of less than 4.8min. This implies that the emission region in IC 310 is smaller than 20% of the gravitational radius of the central supermassive black hole with a mass of $3\times 10^8 M_\odot$, which poses serious questions on the emission mechanism and classification of this enigmatic object. We report on the first quasi-simultaneous multi-frequency VLBI observations of IC 310 conducted with the EVN. We find a blazar-like one-sided core-jet structure on parsec scales, constraining the inclination angle to be less than $\sim 20^\circ$ but very small angles are excluded to limit the de-projected length of the large-scale radio jet., Comment: 4 pages, proceedings of the 12th European VLBI Network Symposium and Users Meeting - EVN 2014, 7-10 October 2014, Cagliari, Italy. Published online in PoS, ID.109

29. Coincidence of a high-fluence blazar outburst with a PeV-energy neutrino event

Author: D. Eisenacher Glawion, Bryce Carpenter, J. A. Zensus, S. Buson, Karl Mannheim, Tim Natusch, Dominik Elsässer, Jamie Stevens, M. Kreter, Julie McEnery, Francesco Longo, Christian Plötz, D. J. Thompson, Chris Phillips, Shinji Horiuchi, E. Litzinger, Felicia Krauß, C. Gräfe, F. W. Stecker, I. Kreykenbohm, Gisela Anton, Alexander Kappes, Thomas Eberl, Philip G. Edwards, T. Beuchert, Eduardo Ros, C. Müller, Jörn Wilms, Sergei Gulyaev, J. Trüstedt, K. Leiter, James E. J. Lovell, Uli Katz, C. W. James, Anastasios Tzioumis, Roopesh Ojha, J. F. H. Quick, T. Steinbring, A. Kreikenbohm, M. Langejahn, Matthias Kadler, Stuart Weston, R. Schulz, W. Baumgartner, N. Gehrels, H. Hase, Kadler, M, Krauß, F., Mannheim, K., Ojha, R., Müller, C., Schulz, R., Anton, G., Baumgartner, W., Beuchert, T., Buson, S., Carpenter, B., Eberl, T., Edwards, P. G., Eisenacher Glawion, D., Elsässer, D., Gehrels, N., Gräfe, C., Gulyaev, S., Hase, H., Horiuchi, S., James, C. W., Kappes, A., Katz, U., Kreikenbohm, A., Kreter, M., Kreykenbohm, I., Langejahn, M., Leiter, K., Litzinger, E., Longo, Francesco, Lovell, J. E. J., Mcenery, J., Natusch, T., Phillips, C., Plötz, C., Quick, J., Ros, E., Stecker, F. W., Steinbring, T., Stevens, J., Thompson, D. J., Trüstedt, J., Tzioumis, A. K., Weston, S., Wilms, J., and Zensus, J. A.
Subjects: High-energy astronomy, Astrophysics::High Energy Astrophysical Phenomena, Astronomy, Neutrino telescope, FOS: Physical sciences, General Physics and Astronomy, Physics and Astronomy, Neutrino, Active Galactic Nuclei, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Fluence, Coincidence, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Blazar, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Astroparticle physics, Physics, 010308 nuclear & particles physics, Astrophysics::Instrumentation and Methods for Astrophysics, High Energy Physics - Phenomenology, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, Astrophysics - High Energy Astrophysical Phenomena, Event (particle physics)
Abstract: The discovery of extraterrestrial very-high-energy neutrinos by the IceCube collaboration has launched a quest for the identification of their astrophysical sources. Gamma-ray blazars have been predicted to yield a cumulative neutrino signal exceeding the atmospheric background above energies of 100 TeV, assuming that both the neutrinos and the gamma-ray photons are produced by accelerated protons in relativistic jets. Since the background spectrum falls steeply with increasing energy, the individual events with the clearest signature of being of an extraterrestrial origin are those at PeV energies. Inside the large positional-uncertainty fields of the first two PeV neutrinos detected by IceCube, the integrated emission of the blazar population has a sufficiently high electromagnetic flux to explain the detected IceCube events, but fluences of individual objects are too low to make an unambiguous source association. Here, we report that a major outburst of the blazar PKS B1424-418 occurred in temporal and positional coincidence with the third PeV-energy neutrino event (IC35) detected by IceCube. Based on an analysis of the full sample of gamma-ray blazars in the IC35 field and assuming a photo-hadronic emission model, we show that the long-term average gamma-ray emission of blazars as a class is in agreement with both the measured all-sky flux of PeV neutrinos and the spectral slope of the IceCube signal. The outburst of PKS B1424-418 has provided an energy output high enough to explain the observed PeV event, indicative of a direct physical association., Accepted for publication in Nature Physics on Mar 3rd, 2016 (arXiv version is the original submitted manuscript as per NatPhys regulations), 38 pages (including 10 pages of supplementary material), 3 figures
Published: 2016

30. The LOFAR Multifrequency Snapshot Sky Survey (MSSS): I. Survey description and first results

Author: G. H. Heald, R. F. Pizzo, E. Orrú, R. P. Breton, D. Carbone, C. Ferrari, M. J. Hardcastle, W. Jurusik, G. Macario, D. Mulcahy, D. Rafferty, A. Asgekar, M. Brentjens, R. A. Fallows, W. Frieswijk, M. C. Toribio, B. Adebahr, M. Arts, M. R. Bell, A. Bonafede, J. Bray, J. Broderick, T. Cantwell, P. Carroll, Y. Cendes, A. O. Clarke, J. Croston, S. Daiboo, F. de Gasperin, J. Gregson, J. Harwood, T. Hassall, V. Heesen, A. Horneffer, A. J. van der Horst, M. Iacobelli, V. Jelić, D. Jones, D. Kant, G. Kokotanekov, P. Martin, J. P. McKean, L. K. Morabito, B. Nikiel-Wroczyński, A. Offringa, V. N. Pandey, M. Pandey-Pommier, M. Pietka, L. Pratley, C. Riseley, A. Rowlinson, J. Sabater, A. M. M. Scaife, L. H. A. Scheers, K. Sendlinger, A. Shulevski, M. Sipior, C. Sobey, A. J. Stewart, A. Stroe, J. Swinbank, C. Tasse, J. Trüstedt, E. Varenius, S. van Velzen, N. Vilchez, R. J. van Weeren, S. Wijnholds, W. L. Williams, A. G. de Bruyn, R. Nijboer, M. Wise, A. Alexov, J. Anderson, I. M. Avruch, R. Beck, M. E. Bell, I. van Bemmel, M. J. Bentum, G. Bernardi, P. Best, F. Breitling, W. N. Brouw, M. Brüggen, H. R. Butcher, B. Ciardi, J. E. Conway, E. de Geus, A. de Jong, M. de Vos, A. Deller, R.-J. Dettmar, S. Duscha, J. Eislöffel, D. Engels, H. Falcke, R. Fender, M. A. Garrett, J. Grießmeier, A. W. Gunst, J. P. Hamaker, J. W. T. Hessels, M. Hoeft, J. Hörandel, H. A. Holties, H. Intema, N. J. Jackson, E. Jütte, A. Karastergiou, W. F. A. Klijn, V. I. Kondratiev, L. V. E. Koopmans, M. Kuniyoshi, G. Kuper, C. Law, J. van Leeuwen, M. Loose, P. Maat, S. Markoff, R. McFadden, D. McKay-Bukowski, M. Mevius, J. C. A. Miller-Jones, R. Morganti, H. Munk, A. Nelles, J. E. Noordam, M. J. Norden, H. Paas, A. G. Polatidis, W. Reich, A. Renting, H. Röttgering, A. Schoenmakers, D. Schwarz, J. Sluman, O. Smirnov, B. W. Stappers, M. Steinmetz, M. Tagger, Y. Tang, S. ter Veen, S. Thoudam, R. Vermeulen, C. Vocks, C. Vogt, R. A. M. J. Wijers, O. Wucknitz, S. Yatawatta, P. Zarka, Heald, G.H., Pizzo, R.F., Orrú, E., Breton, R.P., Carbone, D., Ferrari, C., Hardcastle, M.J., Jurusik, W., Macario, G., Mulcahy, D., Rafferty, D., Asgekar, A., Brentjens, M., Fallows, R.A., Frieswijk, W., Toribio, M.C., Adebahr, B., Arts, M., Bell, M.R., Bonafede, A., Bray, J., Broderick, J., Cantwell, T., Carroll, P., Cendes, Y., Clarke, A.O., Croston, J., Daiboo, S., De Gasperin, F., Gregson, J., Harwood, J., Hassall, T., Heesen, V., Horneffer, A., Van Der Horst, A.J., Iacobelli, M., Jelić, V., Jones, D., Kant, D., Kokotanekov, G., Martin, P., McKean, J.P., Morabito, L.K., Nikiel-Wroczyński, B., Offringa, A., Pandey, V.N., Pandey-Pommier, M., Pietka, M., Pratley, L., Riseley, C., Rowlinson, A., Sabater, J., Scaife, A.M.M., Scheers, L.H.A., Sendlinger, K., Shulevski, A., Sipior, M., Sobey, C., Stewart, A.J., Stroe, A., Swinbank, J., Tasse, C., Trüstedt, J., Varenius, E., Van Velzen, S., Vilchez, N., Van Weeren, R.J., Wijnholds, S., Williams, W.L., De Bruyn, A.G., Nijboer, R., Wise, M., Alexov, A., Anderson, J., Avruch, I.M., Beck, R., Bell, M.E., Van Bemmel, I., Bentum, M.J., Bernardi, G., Best, P., Breitling, F., Brouw, W.N., Brüggen, M., Butcher, H.R., Ciardi, B., Conway, J.E., De Geus, E., De Jong, A., De Vos, M., Deller, A., Dettmar, R.-J., Duscha, S., Eislöffel, J., Engels, D., Falcke, H., Fender, R., Garrett, M.A., Grießmeier, J., Gunst, A.W., Hamaker, J.P., Hessels, J.W.T., Hoeft, M., Hörandel, J., Holties, H.A., Intema, H., Jackson, N.J., Jütte, E., Karastergiou, A., Klijn, W.F.A., Kondratiev, V.I., Koopmans, L.V.E., Kuniyoshi, M., Kuper, G., Law, C., Van Leeuwen, J., Loose, M., Maat, P., Markoff, S., McFadden, R., McKay-Bukowski, D., Mevius, M., Miller-Jones, J.C.A., Morganti, R., Munk, H., Nelles, A., Noordam, J.E., Norden, M.J., Paas, H., Polatidis, A.G., Reich, W., Renting, A., Röttgering, H., Schoenmakers, A., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B.W., Steinmetz, M., Tagger, M., Tang, Y., Ter Veen, S., Thoudam, S., Vermeulen, R., Vocks, C., Vogt, C., Wijers, R.A.M.J., Wucknitz, O., Yatawatta, S., Zarka, P., High Energy Astrophys. & Astropart. Phys (API, FNWI), Netherlands Institute for Radio Astronomy (ASTRON), Jodrell Bank Centre for Astrophysics (JBCA), University of Manchester [Manchester], University of Hertfordshire [Hatfield] (UH), Uniwersytet Jagielloński w Krakowie = Jagiellonian University (UJ), Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), University of Southampton, Jacobs University [Bremen], Astronomical Institute Anton Pannekoek (AI PANNEKOEK), University of Amsterdam [Amsterdam] (UvA), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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), Hamburger Sternwarte/Hamburg Observatory, Universität Hamburg (UHH), School of Physics and Astronomy [Southampton], Leiden Observatory, Leiden University (Leiden Observatory), Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), CSIRO Astronomy and Space Science, Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), Max-Planck-Institut für Radioastronomie (MPIFR), Laboratory for Atmospheric and Space Physics [Boulder] (LASP), University of Colorado [Boulder], Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), 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), Harvard-Smithsonian Center for Astrophysics (CfA), Harvard University-Smithsonian Institution, Leiden Observatory [Leiden], Universiteit Leiden, SRON Netherlands Institute for Space Research (SRON), Leibniz-Institut für Astrophysik Potsdam (AIP), Research School of Astronomy and Astrophysics [Canberra] (RSAA), Australian National University (ANU), Max Planck Institute for Astrophysics, Max-Planck-Gesellschaft, Los Alamos National Laboratory (LANL), Astronomisches Institut der Ruhr-Universität Bochum, Ruhr-Universität Bochum [Bochum], Thüringer Landessternwarte Tautenburg (TLS), Radboud University [Nijmegen], Unité Scientifique de la Station de Nançay (USN), Observatoire des Sciences de l'Univers en région Centre (OSUC), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH / Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures (DSMZ), Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), ANR-09-JCJC-0001,OPALES(2009), European Project: 247295,EC:FP7:ERC,ERC-2009-AdG,AARTFAAC(2010), European Project: 267697,EC:FP7:ERC,ERC-2010-AdG_20100224,4PI-SKY(2011), ITA, GBR, FRA, DEU, NLD, Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre d'études européennes et de politique comparée (CEE), Sciences Po (Sciences Po)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-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)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Harvard University [Cambridge]-Smithsonian Institution, Universiteit Leiden [Leiden], Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Radboud university [Nijmegen], Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Astronomy, Kapteyn Astronomical Institute, Jodrell Bank Centre for Astrophysics, Jagiellonian University [Krakow] (UJ), Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Smithsonian Institution-Harvard University [Cambridge], Université d'Orléans (UO)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-Centre National de la Recherche Scientifique (CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Centre National d’Études Spatiales [Paris] (CNES), ANR-09-JCJC-0001,OPALES,nOn-thermal Processes in gALaxy cluStErs(2009), and Database Architectures
Subjects: 010504 meteorology & atmospheric sciences, Computer science, Astronomy, media_common.quotation_subject, FOS: Physical sciences, METIS-315082, 01 natural sciences, Radio spectrum, Radio continuum: general, surveys, 0103 physical sciences, radio continuum: general, Survey, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), 010303 astronomy & astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), 0105 earth and related environmental sciences, Remote sensing, media_common, Giant Metrewave Radio Telescope, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Astronomy and Astrophysics, LOFAR, Astronomy and Astrophysic, Square kilometre array, IR-98663, Sky, [SDU]Sciences of the Universe [physics], Space and Planetary Science, Experimental High Energy Physics, EWI-26540, Snapshot (computer storage), general [radio continuum], Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: We present the Multifrequency Snapshot Sky Survey (MSSS), the first northern-sky LOFAR imaging survey. In this introductory paper, we first describe in detail the motivation and design of the survey. Compared to previous radio surveys, MSSS is exceptional due to its intrinsic multifrequency nature providing information about the spectral properties of the detected sources over more than two octaves (from 30 to 160 MHz). The broadband frequency coverage, together with the fast survey speed generated by LOFAR's multibeaming capabilities, make MSSS the first survey of the sort anticipated to be carried out with the forthcoming Square Kilometre Array (SKA). Two of the sixteen frequency bands included in the survey were chosen to exactly overlap the frequency coverage of large-area Very Large Array (VLA) and Giant Metrewave Radio Telescope (GMRT) surveys at 74 MHz and 151 MHz respectively. The survey performance is illustrated within the "MSSS Verification Field" (MVF), a region of 100 square degrees centered at J2000 (RA,Dec)=(15h,69deg). The MSSS results from the MVF are compared with previous radio survey catalogs. We assess the flux and astrometric uncertainties in the catalog, as well as the completeness and reliability considering our source finding strategy. We determine the 90% completeness levels within the MVF to be 100 mJy at 135 MHz with 108" resolution, and 550 mJy at 50 MHz with 166" resolution. Images and catalogs for the full survey, expected to contain 150,000-200,000 sources, will be released to a public web server. We outline the plans for the ongoing production of the final survey products, and the ultimate public release of images and source catalogs., Comment: 23 pages, 19 figures. Accepted for publication in Astronomy & Astrophysics. MSSS Verification Field images and catalog data may be downloaded from http://vo.astron.nl
Published: 2015
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

Refine your results

30 results on '"Trüstedt, J."'

1. TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sources

2. Coincidence of a high-fluence blazar outburst with a PeV-energy neutrino event

3. The Gamma-Ray Emitting Radio-Loud Narrow-Line Seyfert 1 Galaxy PKS 2004-447 II. The Radio View

4. The LOFAR Multifrequency Snapshot Sky Survey (MSSS) I. Survey description and first results

5. The EVN view of the highly variable TeV active galaxy IC 310

6. ANTARES Constrains a Blazar Origin of Two IceCube PeV Neutrino Events

7. TANAMI monitoring of Centaurus A: The complex dynamics in the inner parsec of an extragalactic jet

8. Future mmVLBI Research with ALMA: A European vision

9. TANAMI Blazars in the IceCube PeV Neutrino Fields

10. The unusual multiwavelength properties of the gamma-ray source PMNJ1603-4904

11. The TANAMI Program: Southern-Hemisphere AGN on (Sub-)parsec Scales

12. TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry

13. ANTARES constrains a blazar origin of two IceCube PeV neutrino events

14. TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry

15. TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sources

16. The LOFAR Multifrequency Snapshot Sky Survey (MSSS)

17. The TANAMI Multiwavelength Program: Dynamic spectral energy distributions of southern blazars⋆

18. The TANAMI Multiwavelength Program: Dynamic spectral energy distributions of southern blazars

19. Coincidence of a high-fluence blazar outburst with a PeV-energy neutrino event

20. The gamma-ray emitting radio-loud narrow-line Seyfert 1 galaxy PKS 2004−447

21. The LOFAR Multifrequency Snapshot Sky Survey (MSSS): I. Survey description and first results

22. The gamma-ray emitting radio-loud narrow-line Seyfert 1 galaxy PKS 2004−447

23. The LOFAR Multifrequency Snapshot Sky Survey (MSSS)

24. The unusual multiwavelength properties of the gamma-ray source PMNJ1603-4904

25. TANAMI monitoring of Centaurus A: The complex dynamics in the inner parsec of an extragalactic jet

26. TANAMI blazars in the IceCube PeV-neutrino fields

27. The unusual multiwavelength properties of the gamma-ray source PMN J1603−4904

28. The EVN view of the highly variable TeV active galaxy IC 310

29. Coincidence of a high-fluence blazar outburst with a PeV-energy neutrino event

30. The LOFAR Multifrequency Snapshot Sky Survey (MSSS): I. Survey description and first results

Catalog

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

30 results on '"Trüstedt, J."'

Search Results

Catalog

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources