Search

Your search keyword '"Zajczyk A"' showing total 21 results
Start Over Author "Zajczyk A" Publisher american astronomical society
21 results on '"Zajczyk A"'

5. A HaloSat Analysis of the Cygnus Superbubble

Author

Bluem, Jesse, primary, Kaaret, Philip, additional, Fuelberth, William, additional, Zajczyk, Anna, additional, LaRocca, Daniel M., additional, Ringuette, R., additional, Jahoda, Keith M., additional, and Kuntz, K. D., additional

Published
2020
Full Text
View/download PDF

6. An Analysis of the North Polar Spur Using HaloSat

Author

LaRocca, Daniel M., primary, Kaaret, Philip, additional, Kuntz, K. D., additional, Hodges-Kluck, Edmund, additional, Zajczyk, Anna, additional, Bluem, Jesse, additional, Ringuette, Rebecca, additional, and Jahoda, Keith M., additional

Published
2020
Full Text
View/download PDF

8. Total X-Ray Emission from the LMC Observed with HaloSat

Author

Keith Jahoda, R. Ringuette, P. Kaaret, D. M. LaRocca, J. Bluem, Kip D. Kuntz, H. Gulick, and Anna Zajczyk

Subjects
Physics, X-ray astronomy, Space and Planetary Science, X-ray, Astronomy and Astrophysics, Astrophysics, Large Magellanic Cloud, Dwarf galaxy
Abstract

We constrain the global parameters of the Large Magellanic Cloud (LMC) by modeling the first soft X-ray (0.4–6.8 keV) observations of the entire LMC produced in a single pointing with moderate spectral resolution by the HaloSat CubeSat. These data are best fit with the sum of two thermal plasma components in collisional ionization equilibrium and a power law. We find cool (0.210 ± 0.014 keV) and hot (0.89 ± 0.14 keV) components. The total X-ray luminosity of the LMC is (1.08 ± 0.14) × 1039 erg s−1. X-ray binaries make up a large fraction of the emission with a luminosity of (6.0 ± 0.8) × 1038 erg s−1, followed by cool gas from superbubbles, supernovae, and diffuse emission with a luminosity of (3.0 ± 0.3) × 1038 erg s−1. The hot gas from star formation contributes the smallest fraction, with a luminosity of (1.9 ± 0.5) × 1038 erg s−1. We estimate the total volume of the cool gas to be between (0.2–1.2) × 1010 pc3 and the hot gas to be between (1.0–5) × 107 pc3 for filling factors of f = 1 and 0.2. These volumes result in a total thermal energy for the cool gas between (1.4–3) × 1054 erg for electron densities of 0.017–0.04 cm−3, and a thermal energy for the hot gas between (1.7–4) × 1053 erg for electron densities of 0.12–0.3 cm−3. This yields cooling timescales for the cool and hot gas of (1.5–3) × 108 yr and (1.8–6) × 107 yr, respectively.

Published
2021

9. An Analysis of the North Polar Spur Using HaloSat

Author

Philip Kaaret, R. Ringuette, Keith Jahoda, D. M. LaRocca, Edmund Hodges-Kluck, J. Bluem, Kip D. Kuntz, and Anna Zajczyk

Subjects
Physics, 010504 meteorology & atmospheric sciences, media_common.quotation_subject, Library science, Astronomy and Astrophysics, 01 natural sciences, Ground station, Presentation, Work (electrical), Space and Planetary Science, 0103 physical sciences, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, media_common
Abstract

This research was supported by NASA grant No. NNX15AU57G. This research was also supported by the NASA Iowa Space Grant under award No. NNX16AL88H. We acknowledge Steven Spangler, Cornelia Lang, and Casey DeRoo for their useful comments discussions that helped to improve the work. We acknowledge our support from NASA GSFC particularly the work of Thomas Johnson, the hard work of all the individuals at the University of Iowa that helped make HaloSat a success, the Blue Canyon Technologies team for their work on the spacecraft bus and for acting as the mission operation center, and the WFF UHF Ground Station Team for their support of HaloSat in orbit. We acknowledge the contribution from our anonymous reviewer, whose comments helped to clarify the presentation of this work.

Published
2020

10. HaloSat: A CubeSat to Study the Hot Galactic Halo

Author

Kaaret, P., primary, Zajczyk, A., additional, LaRocca, D. M., additional, Ringuette, R., additional, Bluem, J., additional, Fuelberth, W., additional, Gulick, H., additional, Jahoda, K., additional, Johnson, T. E., additional, Kirchner, D. L., additional, Koutroumpa, D., additional, Kuntz, K. D., additional, McCurdy, R., additional, Miles, D. M., additional, Robison, W. T., additional, and Silich, E. M., additional

Published
2019
Full Text
View/download PDF

11. The First Detection of a Pulsar with ALMA

Author

Mignani, R. P., primary, Paladino, R., additional, Rudak, B., additional, Zajczyk, A., additional, Corongiu, A., additional, de Luca, A., additional, Hummel, W., additional, Possenti, A., additional, Geppert, U., additional, Burgay, M., additional, and Marconi, G., additional

Published
2017
Full Text
View/download PDF

12. The First Detection of a Pulsar with ALMA

Author

W. Hummel, Andrea Possenti, Roberto Mignani, Anna Zajczyk, Ulrich Geppert, Marta Burgay, Alessandro Corongiu, Andrea De Luca, Gianni Marconi, Bronek Rudak, and Rosita Paladino

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Spectral index, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Vela, 01 natural sciences, Electromagnetic radiation, 010305 fluids & plasmas, Stars, Supernova, Neutron star, Pulsar, Space and Planetary Science, 0103 physical sciences, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Radio wave
Abstract

Pulsars are neutron stars, stellar corpses left over after supernova explosions of stars about ten times as massive as our Sun, with densities comparable to the atomic nucleus', spinning with periods from few milliseconds up to few seconds, and endowed with magnetic fields thousands billion times stronger than the Earth's, where particles are accelerated to the relativistic regime producing electromagnetic radiation across the entire spectrum. Although there is a general consensus on the fact that pulsars' radio emission is coherent in nature, whereas the emission from the optical to high-energy $\gamma$-rays is due to incoherent processes, it has not been established yet at which wavelengths the transition occurs, a key information for all emission models of pulsar magnetospheres. Of course, to address this issue covering the spectral region between high-frequency radio waves and the mid-IR is crucial. We used the Atacama Large Millimetre Array (ALMA) to observe the Vela pulsar (PSR\, B0833$-$45), one of the very few observed in radio and from the mid-infrared up to the very high-energy $\gamma$-rays. We detected Vela at frequencies of 97.5, 145, 233, 343.5 GHz and found that its energy density spectrum follows a power-law of spectral index $\alpha = -0.93 \pm 0.16$. The ALMA spectrum corresponds to very high brightness temperatures - from $10^{17}$ to $10^{15}$ K - suggesting that a coherent radiative process still contributes to the mm/sub-mm emission. This is, therefore, the first indication of coherent emission other than radio originating in pulsars. At the same time, we identified an extended structure, preliminarily detected in ground-based observations. We support its interpretation as a counter-jet protruding from the pulsar., Comment: 13 pages, 6 figures, published in ApJ Letter

Published
2017

14. Confirmation of Intervening Filaments of Galaxies at the Redshifts ofChandraWHIM Absorption Features

Author

Philip Kaaret, Shea Brown, and Anna Zajczyk

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, Far ultraviolet, Astrophysics::Cosmology and Extragalactic Astrophysics, General Medicine, Astrophysics, Redshift, Galaxy, Intergalactic medium, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Blazar, Absorption (electromagnetic radiation), Astrophysics::Galaxy Astrophysics
Abstract

We report the $a~posteriori$ confirmation of two large-scale filaments along the sight-line of the blazar 1ES~1553+113, which correspond to Warm-Hot Intergalactic Medium (WHIM) absorption features in the X-ray and far ultraviolet. We use the WISE-SuperCOSMOS photometric catalog to map the cosmic-web in the direction of the blazar, and find significant filaments at redshifts of $z=0.23\pm0.02$ and $z=0.31\pm0.02$, which roughly align with the absorption redshifts. A third X-ray absorption feature at $z_X=0.133$ did not have any corresponding structures in the photometric catalog.

Published
2017

15. A SEARCH FOR PULSATIONS FROM GEMINGA ABOVE 100 GeV WITH VERITAS

Author

Aliu, E., primary, Archambault, S., additional, Archer, A., additional, Aune, T., additional, Barnacka, A., additional, Beilicke, M., additional, Benbow, W., additional, Bird, R., additional, Buckley, J. H., additional, Bugaev, V., additional, Byrum, K., additional, Cardenzana, J. V., additional, Cerruti, M., additional, Chen, X., additional, Ciupik, L., additional, Connolly, M. P., additional, Cui, W., additional, Dickinson, H. J., additional, Dumm, J., additional, Eisch, J. D., additional, Errando, M., additional, Falcone, A., additional, Feng, Q., additional, Finley, J. P., additional, Fleischhack, H., additional, Fortin, P., additional, Fortson, L., additional, Furniss, A., additional, Gillanders, G. H., additional, Griffin, S., additional, Griffiths, S. T., additional, Grube, J., additional, Gyuk, G., additional, Håkansson, N., additional, Hanna, D., additional, Holder, J., additional, Humensky, T. B., additional, Johnson, C. A., additional, Kaaret, P., additional, Kar, P., additional, Kertzman, M., additional, Kieda, D., additional, Krennrich, F., additional, Kumar, S., additional, Lang, M. J., additional, Lyutikov, M., additional, Madhavan, A. S, additional, Maier, G., additional, McArthur, S., additional, McCann, A., additional, Meagher, K., additional, Millis, J., additional, Moriarty, P., additional, Mukherjee, R., additional, Nieto, D., additional, O'Faoláin de Bhróithe, A., additional, Ong, R. A., additional, Otte, A. N., additional, Park, N., additional, Pohl, M., additional, Popkow, A., additional, Prokoph, H., additional, Pueschel, E., additional, Quinn, J., additional, Ragan, K., additional, Reyes, L. C., additional, Reynolds, P. T., additional, Richards, G. T., additional, Roache, E., additional, Santander, M., additional, Sembroski, G. H., additional, Shahinyan, K., additional, Smith, A. W., additional, Staszak, D., additional, Telezhinsky, I., additional, Tucci, J. V., additional, Tyler, J., additional, Varlotta, A., additional, Vincent, S., additional, Wakely, S. P., additional, Weinstein, A., additional, Williams, D. A., additional, Zajczyk, A., additional, and Zitzer, B., additional

Published
2015
Full Text
View/download PDF

16. A SEARCH FOR PULSATIONS FROM GEMINGA ABOVE 100 GeV WITH VERITAS

Author

P. Kaaret, P. Moriarty, A. N. Otte, P. T. Reynolds, M. P. Connolly, Manel Errando, S. Kumar, S. Griffin, Daniel Nieto, J. H. Buckley, T. Aune, D. Staszak, Lucy Fortson, L. Ciupik, S. Archambault, Frank Krennrich, Matteo Cerruti, L. C. Reyes, N. H. Park, B. Zitzer, J. Millis, K. Ragan, A. Popkow, J. P. Finley, Wei Cui, Anna Zajczyk, Calvin A. Johnson, J. V. Tucci, Gernot Maier, E. Pueschel, J. Tyler, H. Prokoph, A. W. Smith, J. D. Eisch, Gordon T. Richards, R. A. Ong, M. Beilicke, E. Aliu, H. Fleischhack, G. H. Sembroski, S. P. Wakely, Martin Pohl, Xuhui Chen, T. B. Humensky, S. T. Griffiths, Karen Byrum, J. Dumm, P. Kar, A. Weinstein, Maxim Lyutikov, S. Vincent, G. H. Gillanders, Anna Barnacka, K. Meagher, I. Telezhinsky, Jamie Holder, A. McCann, R. Mukherjee, David Kieda, J. Grube, Hugh Dickinson, D. S. Hanna, V. Bugaev, A. S. Madhavan, Wystan Benbow, S. McArthur, N. Håkansson, Geza Gyuk, J. V. Cardenzana, D. A. Williams, John L. Quinn, Q. Feng, A. Varlotta, E. Roache, Abraham D. Falcone, Karlen Shahinyan, A. Furniss, Avery Archer, M. Kertzman, A. O'Faolain de Bhroithe, P. Fortin, Ralph Bird, Marcos Santander, M. J. Lang, and ~

Subjects
tev gamma-rays, catalog, vela pulsar, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Flux, Context (language use), Astrophysics, gamma rays: stars, Space (mathematics), 01 natural sciences, law.invention, Telescope, Pulsar, law, pulsars: general, pulsars: individual (psr j0633+1746, geminga), 0103 physical sciences, galactic sources, Emission spectrum, pg 1553+113, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, high-energy emission, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Large area telescope, crab pulsar, 010308 nuclear & particles physics, Institut für Physik und Astronomie, Spectral density, Astronomy and Astrophysics, fermi-lat observations, High energy emission, large-area telescope, x-ray, Space and Planetary Science, ddc:520, Astrophysics - High Energy Astrophysical Phenomena, Fermi Gamma-ray Space Telescope
Abstract

The astrophysical journal 800(1), 61 - (2015). doi:10.1088/0004-637X/800/1/61, We present the results of 71.6 hr of observations of the Geminga pulsar (PSR J0633+1746) with the VERITAS very-high-energy gamma-ray telescope array. Data taken with VERITAS between 2007 November and 2013 February were phase-folded using a Geminga pulsar timing solution derived from data recorded by the XMM- Newton and Fermi-LAT space telescopes. No significant pulsed emission above 100 GeV is observed, and we report upper limits at the 95% confidence level on the integral flux above 135 GeV (spectral analysis threshold) of 4.0 × 10$^{–1}$3 s$^{–1}$ cm$^{–2}$ and 1.7 × 10$^{–13}$ s$^{–1}$ cm$^{–2}$ for the two principal peaks in the emission profile. These upper limits, placed in context with phase-resolved spectral energy distributions determined from 5 yr of data from the Fermi-Large Area Telescope (LAT), constrain possible hardening of the Geminga pulsar emission spectra above ~50 GeV., Published by Univ.11032, Chicago, Ill. [u.a.]

Published
2015

17. VERY-HIGH ENERGY OBSERVATIONS OF THE GALACTIC CENTER REGION BY VERITAS IN 2010-2012

Author

Archer, A., primary, Barnacka, A., additional, Beilicke, M., additional, Benbow, W., additional, Berger, K., additional, Bird, R., additional, Biteau, J., additional, Buckley, J. H., additional, Bugaev, V., additional, Byrum, K., additional, Cardenzana, J. V, additional, Cerruti, M., additional, Chen, W., additional, Chen, X., additional, Ciupik, L., additional, Connolly, M. P., additional, Cui, W., additional, Dickinson, H. J., additional, Dumm, J., additional, Eisch, J. D., additional, Falcone, A., additional, Federici, S., additional, Feng, Q., additional, Finley, J. P., additional, Fleischhack, H., additional, Fortson, L., additional, Furniss, A., additional, Galante, N., additional, Griffin, S., additional, Griffiths, S. T., additional, Grube, J., additional, Gyuk, G., additional, Håkansson, N., additional, Hanna, D., additional, Holder, J., additional, Hughes, G., additional, Johnson, C. A., additional, Kaaret, P., additional, Kar, P., additional, Kertzman, M., additional, Khassen, Y., additional, Kieda, D., additional, Krawczynski, H., additional, Kumar, S., additional, Lang, M. J., additional, Maier, G., additional, McArthur, S., additional, McCann, A., additional, Meagher, K., additional, Moriarty, P., additional, Mukherjee, R., additional, Nieto, D., additional, O'Faoláin de Bhróithe, A., additional, Ong, R. A., additional, Otte, A. N., additional, Park, N., additional, Perkins, J. S., additional, Pohl, M., additional, Popkow, A., additional, Prokoph, H., additional, Pueschel, E., additional, Quinn, J., additional, Ragan, K., additional, Rajotte, J., additional, Reyes, L. C., additional, Reynolds, P. T., additional, Richards, G. T., additional, Roache, E., additional, Sembroski, G. H., additional, Shahinyan, K., additional, Smith, A. W., additional, Staszak, D., additional, Telezhinsky, I., additional, Tucci, J. V., additional, Tyler, J., additional, Varlotta, A., additional, Vincent, S., additional, Wakely, S. P., additional, Weinstein, A., additional, Welsing, R., additional, Wilhelm, A., additional, Williams, D. A., additional, Zajczyk, A., additional, and Zitzer, B., additional

Published
2014
Full Text
View/download PDF

18. A THREE-YEAR MULTI-WAVELENGTH STUDY OF THE VERY-HIGH-ENERGY γ-RAY BLAZAR 1ES 0229+200

Author

Aliu, E., primary, Archambault, S., additional, Arlen, T., additional, Aune, T., additional, Behera, B., additional, Beilicke, M., additional, Benbow, W., additional, Berger, K., additional, Bird, R., additional, Bouvier, A., additional, Buckley, J. H., additional, Bugaev, V., additional, Byrum, K., additional, Cerruti, M., additional, Chen, X., additional, Ciupik, L., additional, Connolly, M. P., additional, Cui, W., additional, Duke, C., additional, Dumm, J., additional, Errando, M., additional, Falcone, A., additional, Federici, S., additional, Feng, Q., additional, Finley, J. P., additional, Fleischhack, H., additional, Fortin, P., additional, Fortson, L., additional, Furniss, A., additional, Galante, N., additional, Gillanders, G. H., additional, Griffin, S., additional, Griffiths, S. T., additional, Grube, J., additional, Gyuk, G., additional, Hanna, D., additional, Holder, J., additional, Hughes, G., additional, Humensky, T. B., additional, Johnson, C. A., additional, Kaaret, P., additional, Kertzman, M., additional, Khassen, Y., additional, Kieda, D., additional, Krawczynski, H., additional, Krennrich, F., additional, Lang, M. J., additional, Madhavan, A. S, additional, Maier, G., additional, Majumdar, P., additional, McArthur, S., additional, McCann, A., additional, Meagher, K., additional, Millis, J., additional, Moriarty, P., additional, Mukherjee, R., additional, Nieto, D., additional, O'Faoláin de Bhróithe, A., additional, Ong, R. A., additional, Otte, A. N., additional, Park, N., additional, Perkins, J. S., additional, Pohl, M., additional, Popkow, A., additional, Prokoph, H., additional, Quinn, J., additional, Ragan, K., additional, Reyes, L. C., additional, Reynolds, P. T., additional, Richards, G. T., additional, Roache, E., additional, Sembroski, G. H., additional, Smith, A. W., additional, Staszak, D., additional, Telezhinsky, I., additional, Theiling, M., additional, Varlotta, A., additional, Vassiliev, V. V., additional, Vincent, S., additional, Wakely, S. P., additional, Weekes, T. C., additional, Weinstein, A., additional, Welsing, R., additional, Williams, D. A., additional, Zajczyk, A., additional, and Zitzer, B., additional

Published
2014
Full Text
View/download PDF

19. A SEARCH FOR ENHANCED VERY HIGH ENERGY GAMMA-RAY EMISSION FROM THE 2013 MARCH CRAB NEBULA FLARE

Author

Aliu, E., primary, Archambault, S., additional, Aune, T., additional, Benbow, W., additional, Berger, K., additional, Bird, R., additional, Bouvier, A., additional, Buckley, J. H., additional, Bugaev, V., additional, Byrum, K., additional, Cerruti, M., additional, Chen, X., additional, Ciupik, L., additional, Connolly, M. P., additional, Cui, W., additional, Dumm, J., additional, Errando, M., additional, Falcone, A., additional, Federici, S., additional, Feng, Q., additional, Finley, J. P., additional, Fortin, P., additional, Fortson, L., additional, Furniss, A., additional, Galante, N., additional, Gillanders, G. H., additional, Griffin, S., additional, Griffiths, S. T., additional, Grube, J., additional, Gyuk, G., additional, Hanna, D., additional, Holder, J., additional, Hughes, G., additional, Humensky, T. B., additional, Kaaret, P., additional, Kertzman, M., additional, Khassen, Y., additional, Kieda, D., additional, Krennrich, F., additional, Kumar, S., additional, Lang, M. J., additional, Lyutikov, M., additional, Maier, G., additional, McArthur, S., additional, McCann, A., additional, Meagher, K., additional, Millis, J., additional, Moriarty, P., additional, Mukherjee, R., additional, de Bhróithe, A. O'Faoláin, additional, Ong, R. A., additional, Otte, A. N., additional, Park, N., additional, Perkins, J. S., additional, Pohl, M., additional, Popkow, A., additional, Quinn, J., additional, Ragan, K., additional, Rajotte, J., additional, Reyes, L. C., additional, Reynolds, P. T., additional, Richards, G. T., additional, Roache, E., additional, Sembroski, G. H., additional, Sheidaei, F., additional, Smith, A. W., additional, Staszak, D., additional, Telezhinsky, I., additional, Theiling, M., additional, Tucci, J. V., additional, Tyler, J., additional, Varlotta, A., additional, Wakely, S. P., additional, Weekes, T. C., additional, Weinstein, A., additional, Welsing, R., additional, Williams, D. A., additional, Zajczyk, A., additional, and Zitzer, B., additional

Published
2013
Full Text
View/download PDF

20. MULTIWAVELENGTH OBSERVATIONS OF THE TeV BINARY LS I +61° 303 WITH VERITAS,Fermi-LAT, ANDSwift/XRT DURING A TeV OUTBURST

Author

Aliu, E., primary, Archambault, S., additional, Behera, B., additional, Berger, K., additional, Beilicke, M., additional, Benbow, W., additional, Bird, R., additional, Bouvier, A., additional, Bugaev, V., additional, Cerruti, M., additional, Chen, X., additional, Ciupik, L., additional, Connolly, M. P., additional, Cui, W., additional, Dumm, J., additional, Falcone, A., additional, Federici, S., additional, Feng, Q., additional, Finley, J. P., additional, Fortin, P., additional, Fortson, L., additional, Furniss, A., additional, Galante, N., additional, Gillanders, G. H., additional, Griffin, S., additional, Griffiths, S. T., additional, Grube, J., additional, Gyuk, G., additional, Hanna, D., additional, Holder, J., additional, Hughes, G., additional, Humensky, T. B., additional, Kaaret, P., additional, Kertzman, M., additional, Khassen, Y., additional, Kieda, D., additional, Krennrich, F., additional, Lang, M. J., additional, Maier, G., additional, Majumdar, P., additional, McArthur, S., additional, McCann, A., additional, Moriarty, P., additional, Mukherjee, R., additional, de Bhróithe, A. O'Faoláin, additional, Ong, R. A., additional, Otte, A. N., additional, Park, N., additional, Perkins, J. S., additional, Pohl, M., additional, Popkow, A., additional, Prokoph, H., additional, Quinn, J., additional, Ragan, K., additional, Rajotte, J., additional, Ratliff, G., additional, Reynolds, P. T., additional, Richards, G. T., additional, Roache, E., additional, Sembroski, G. H., additional, Sheidaei, F., additional, Skole, C., additional, Smith, A. W., additional, Staszak, D., additional, Telezhinsky, I., additional, Tyler, J., additional, Varlotta, A., additional, Vincent, S., additional, Wakely, S. P., additional, Weekes, T. C., additional, Weinstein, A., additional, Welsing, R., additional, Zajczyk, A., additional, and Zitzer, B., additional

Published
2013
Full Text
View/download PDF

21. Long-term TeV and X-ray Observations of the Gamma-ray Binary HESS J0632+057

Author

Laboratoire Leprince-Ringuet (LLR) ; CNRS - IN2P3 - Polytechnique - X, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE) ; CNRS - IN2P3 - Université Paris VII - Paris Diderot - Université Pierre et Marie Curie (UPMC) - Paris VI, Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA) (IRFU) ; CEA, ASTRO ; Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG) ; CNRS - IN2P3 - Université Sciences et Technologies - Bordeaux I - CNRS - IN2P3 - Université Sciences et Technologies - Bordeaux I, APC - AHE ; AstroParticule et Cosmologie (APC - UMR 7164) ; CNRS - CEA - IN2P3 - Observatoire de Paris - Université Paris VII - Paris Diderot - CNRS - CEA - IN2P3 - Observatoire de Paris - Université Paris VII - Paris Diderot, AstroParticule et Cosmologie (APC - UMR 7164) ; CNRS - CEA - IN2P3 - Observatoire de Paris - Université Paris VII - Paris Diderot, Laboratoire Univers et Particules de Montpellier (LUPM) ; CNRS - IN2P3 - Université Montpellier II - Sciences et techniques, Laboratoire d'Annecy le Vieux de Physique des Particules (LAPP) ; CNRS - IN2P3 - Université de Savoie, ASTRO ; Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG) ; CNRS - IN2P3 - Université Sciences et Technologies - Bordeaux I - CNRS - IN2P3 - Université Sciences et Technologies - Bordeaux I - Laboratoire Univers et Particules de Montpellier (LUPM) ; CNRS - IN2P3 - Université Montpellier II - Sciences et techniques - CNRS - Université Montpellier II - Sciences et techniques, HESS, Aliu, E., Archambault, S., Aune, T., Behera, B., Beilicke, M., Benbow, W., Berger, K., Bird, R., Bouvier, A., Buckley, J. H., Bugaev, V., Byrum, K., Cerruti, M., Chen, X., Ciupik, L., Connolly, M. P., Cui, W., Duke, C., Dumm, J., Errando, M., Falcone, A., Federici, S., Feng, Q., Finley, J. P., Fortin, P., Fortson, L., Furniss, A., Galante, N., Gillanders, G. H., Griffin, S., Griffiths, S. T., Grube, J., Gyuk, G., Hanna, D., Holder, J., Hughes, G., Humensky, T. B., Kaaret, P., Kertzman, M., Khassen, Y., Kieda, D., Krawczynski, H., Krennrich, F., Lang, M. J., Madhavan, A. S, Maier, G., Majumdar, P., Mccann, A., Moriarty, P., Mukherjee, R., Nieto, D., De Bhróithe, A. O'Faoláin, Ong, R. A., Otte, A. N., Park, N., Perkins, J. S., Pohl, M., Popkow, A., Prokoph, H., Quinn, J., Ragan, K., Rajotte, J., Reyes, L. C., Reynolds, P. T., Richards, G. T., Roache, E., Rousselle, J., Sembroski, G. H., Sheidaei, F., Skole, C., Smith, A. W., Staszak, D., Stroh, M., Telezhinsky, I., Theiling, M., Tucci, J. V., Tyler, J., Varlotta, A., Vincent, S., Wakely, S. P., Weinstein, A., Welsing, R., Williams, D. A., Zajczyk, A., Zitzer, B., Abramowski, A., Aharonian, F., Benkhali, F. Ait, Akhperjanian, A. G., Angüner, E., Anton, G., Balenderan, S., Balzer, A., Barnacka, A., Becherini, Y., Tjus, J. Becker, Bernlöhr, K., Birsin, E., Bissaldi, E., Biteau, J., Böttcher, M., Boisson, C., Bolmont, J., Bordas, P., Brucker, J., Brun, F., Brun, P., Bulik, T., Carrigan, S., Casanova, S., Chadwick, P. M., Chalme-Calvet, R., Chaves, R. C. G., Cheesebrough, A., Chrétien, M., Colafrancesco, S., Cologna, G., Conrad, J., Couturier, C., Dalton, M., Daniel, M. K., Davids, I. D., Degrange, B., Deil, C., DeWilt, P., Dickinson, H. J., Djannati-Ataï, A., Domainko, W., Drury, L. O'C., Dubus, G., Dutson, K., Dyks, J., Dyrda, M., Edwards, T., Egberts, K., Eger, P., Espigat, P., Farnier, C., Fegan, S., Feinstein, F., Fernandes, M. V., Fernandez, D., Fiasson, A., Fontaine, G., Forster, A., Füßling, M., Gajdus, M., Gallant, Y. A., Garrigoux, T., Giavitto, G., Giebels, B., Glicenstein, J. F., Grondin, M. -H., Grudzińska, M., Häffner, S., Hahn, J., Harris, J., Heinzelmann, G., Henri, G., Hermann, G., Hervet, O., Hillert, A., Hinton, J. A., Hofmann, W., Hofverberg, P., Holler, M., Horns, D., Jacholkowska, A., Jahn, C., Jamrozy, M., Janiak, M., Jankowsky, F., Jung, I., Kastendieck, M. A., Katarzyński, K., Katz, U., Kaufmann, S., Khélifi, B., Kieffer, M., Klepser, S., Klochkov, D., Kluźniak, W., Kneiske, T., Kolitzus, D., Komin, Nu., Kosack, K., Krakau, S., Krayzel, F., Krüger, P. P., Laffon, H., Lamanna, G., Lefaucheur, J., Lemiére, A., Lemoine-Goumard, M., Lenain, J. -P., Lennarz, D., Lohse, T., Lopatin, A., Lu, C. -C., Marandon, V., Marcowith, A., Marx, R., Maurin, G., Maxted, N., Mayer, M., McComb, T. J. L., Méhault, J., Menzler, U., Meyer, M., Moderski, R., Mohamed, M., Moulin, E., Murach, T., Naumann, C. L., De Naurois, M., Niemiec, J., Nolan, S. J., Oakes, L., Ohm, S., Wilhelmi, E. De Onña, Opitz, B., Ostrowski, M., Oya, I., Panter, M., Parsons, R. D., Arribas, M. Paz, Pekeur, N. W., Pelletier, G., Perez, J., Petrucci, P. -O., Peyaud, B., Pita, S., Poon, H., Pühlhofer, G., Punch, M., Quirrenbach, A., Raab, S., Raue, M., Reimer, A., Reimer, O., Renaud, M., Reyes, R. De Los, Rieger, F., Rob, L., Romoli, C., Rosier-Lees, S., Rowell, G., Rudak, B., Rulten, C. B., Sahakian, V., Sanchez, D. A., Santangelo, A., Schlickeiser, R., Schüssler, F., Schulz, A., Schwanke, U., Schwarzburg, S., Schwemmer, S., Sol, H., Spengler, G., Spies, F., Stawarz, Ł., Steenkamp, R., Stegmann, C., Stinzing, F., Stycz, K., Sushch, I., Szostek, A., Tavernet, J. -P., Tavernier, T., Taylor, A. M., Terrier, R., Tluczykont, M., Trichard, C., Valerius, K., Van Eldik, C., Vasileiadis, G., Venter, C., Viana, A., Vincent, P., Völk, H. J., Volpe, F., Vorster, M., Wagner, S. J., Wagner, P., Ward, M., Weidinger, M., Weitzel, Q., White, R., Wierzcholska, A., Willmann, P., Wörnlein, A., Wouters, D., Zacharias, M., Zdziarski, A. A., Zech, A., Zechlin, H. -S., Laboratoire Leprince-Ringuet (LLR) ; CNRS - IN2P3 - Polytechnique - X, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE) ; CNRS - IN2P3 - Université Paris VII - Paris Diderot - Université Pierre et Marie Curie (UPMC) - Paris VI, Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA) (IRFU) ; CEA, ASTRO ; Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG) ; CNRS - IN2P3 - Université Sciences et Technologies - Bordeaux I - CNRS - IN2P3 - Université Sciences et Technologies - Bordeaux I, APC - AHE ; AstroParticule et Cosmologie (APC - UMR 7164) ; CNRS - CEA - IN2P3 - Observatoire de Paris - Université Paris VII - Paris Diderot - CNRS - CEA - IN2P3 - Observatoire de Paris - Université Paris VII - Paris Diderot, AstroParticule et Cosmologie (APC - UMR 7164) ; CNRS - CEA - IN2P3 - Observatoire de Paris - Université Paris VII - Paris Diderot, Laboratoire Univers et Particules de Montpellier (LUPM) ; CNRS - IN2P3 - Université Montpellier II - Sciences et techniques, Laboratoire d'Annecy le Vieux de Physique des Particules (LAPP) ; CNRS - IN2P3 - Université de Savoie, ASTRO ; Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG) ; CNRS - IN2P3 - Université Sciences et Technologies - Bordeaux I - CNRS - IN2P3 - Université Sciences et Technologies - Bordeaux I - Laboratoire Univers et Particules de Montpellier (LUPM) ; CNRS - IN2P3 - Université Montpellier II - Sciences et techniques - CNRS - Université Montpellier II - Sciences et techniques, HESS, Aliu, E., Archambault, S., Aune, T., Behera, B., Beilicke, M., Benbow, W., Berger, K., Bird, R., Bouvier, A., Buckley, J. H., Bugaev, V., Byrum, K., Cerruti, M., Chen, X., Ciupik, L., Connolly, M. P., Cui, W., Duke, C., Dumm, J., Errando, M., Falcone, A., Federici, S., Feng, Q., Finley, J. P., Fortin, P., Fortson, L., Furniss, A., Galante, N., Gillanders, G. H., Griffin, S., Griffiths, S. T., Grube, J., Gyuk, G., Hanna, D., Holder, J., Hughes, G., Humensky, T. B., Kaaret, P., Kertzman, M., Khassen, Y., Kieda, D., Krawczynski, H., Krennrich, F., Lang, M. J., Madhavan, A. S, Maier, G., Majumdar, P., Mccann, A., Moriarty, P., Mukherjee, R., Nieto, D., De Bhróithe, A. O'Faoláin, Ong, R. A., Otte, A. N., Park, N., Perkins, J. S., Pohl, M., Popkow, A., Prokoph, H., Quinn, J., Ragan, K., Rajotte, J., Reyes, L. C., Reynolds, P. T., Richards, G. T., Roache, E., Rousselle, J., Sembroski, G. H., Sheidaei, F., Skole, C., Smith, A. W., Staszak, D., Stroh, M., Telezhinsky, I., Theiling, M., Tucci, J. V., Tyler, J., Varlotta, A., Vincent, S., Wakely, S. P., Weinstein, A., Welsing, R., Williams, D. A., Zajczyk, A., Zitzer, B., Abramowski, A., Aharonian, F., Benkhali, F. Ait, Akhperjanian, A. G., Angüner, E., Anton, G., Balenderan, S., Balzer, A., Barnacka, A., Becherini, Y., Tjus, J. Becker, Bernlöhr, K., Birsin, E., Bissaldi, E., Biteau, J., Böttcher, M., Boisson, C., Bolmont, J., Bordas, P., Brucker, J., Brun, F., Brun, P., Bulik, T., Carrigan, S., Casanova, S., Chadwick, P. M., Chalme-Calvet, R., Chaves, R. C. G., Cheesebrough, A., Chrétien, M., Colafrancesco, S., Cologna, G., Conrad, J., Couturier, C., Dalton, M., Daniel, M. K., Davids, I. D., Degrange, B., Deil, C., DeWilt, P., Dickinson, H. J., Djannati-Ataï, A., Domainko, W., Drury, L. O'C., Dubus, G., Dutson, K., Dyks, J., Dyrda, M., Edwards, T., Egberts, K., Eger, P., Espigat, P., Farnier, C., Fegan, S., Feinstein, F., Fernandes, M. V., Fernandez, D., Fiasson, A., Fontaine, G., Forster, A., Füßling, M., Gajdus, M., Gallant, Y. A., Garrigoux, T., Giavitto, G., Giebels, B., Glicenstein, J. F., Grondin, M. -H., Grudzińska, M., Häffner, S., Hahn, J., Harris, J., Heinzelmann, G., Henri, G., Hermann, G., Hervet, O., Hillert, A., Hinton, J. A., Hofmann, W., Hofverberg, P., Holler, M., Horns, D., Jacholkowska, A., Jahn, C., Jamrozy, M., Janiak, M., Jankowsky, F., Jung, I., Kastendieck, M. A., Katarzyński, K., Katz, U., Kaufmann, S., Khélifi, B., Kieffer, M., Klepser, S., Klochkov, D., Kluźniak, W., Kneiske, T., Kolitzus, D., Komin, Nu., Kosack, K., Krakau, S., Krayzel, F., Krüger, P. P., Laffon, H., Lamanna, G., Lefaucheur, J., Lemiére, A., Lemoine-Goumard, M., Lenain, J. -P., Lennarz, D., Lohse, T., Lopatin, A., Lu, C. -C., Marandon, V., Marcowith, A., Marx, R., Maurin, G., Maxted, N., Mayer, M., McComb, T. J. L., Méhault, J., Menzler, U., Meyer, M., Moderski, R., Mohamed, M., Moulin, E., Murach, T., Naumann, C. L., De Naurois, M., Niemiec, J., Nolan, S. J., Oakes, L., Ohm, S., Wilhelmi, E. De Onña, Opitz, B., Ostrowski, M., Oya, I., Panter, M., Parsons, R. D., Arribas, M. Paz, Pekeur, N. W., Pelletier, G., Perez, J., Petrucci, P. -O., Peyaud, B., Pita, S., Poon, H., Pühlhofer, G., Punch, M., Quirrenbach, A., Raab, S., Raue, M., Reimer, A., Reimer, O., Renaud, M., Reyes, R. De Los, Rieger, F., Rob, L., Romoli, C., Rosier-Lees, S., Rowell, G., Rudak, B., Rulten, C. B., Sahakian, V., Sanchez, D. A., Santangelo, A., Schlickeiser, R., Schüssler, F., Schulz, A., Schwanke, U., Schwarzburg, S., Schwemmer, S., Sol, H., Spengler, G., Spies, F., Stawarz, Ł., Steenkamp, R., Stegmann, C., Stinzing, F., Stycz, K., Sushch, I., Szostek, A., Tavernet, J. -P., Tavernier, T., Taylor, A. M., Terrier, R., Tluczykont, M., Trichard, C., Valerius, K., Van Eldik, C., Vasileiadis, G., Venter, C., Viana, A., Vincent, P., Völk, H. J., Volpe, F., Vorster, M., Wagner, S. J., Wagner, P., Ward, M., Weidinger, M., Weitzel, Q., White, R., Wierzcholska, A., Willmann, P., Wörnlein, A., Wouters, D., Zacharias, M., Zdziarski, A. A., Zech, A., and Zechlin, H. -S.

Abstract

35 pages, 8 figures, accepted for publication in ApJ, HESS J0632+057 is the only gamma-ray binary known so far whose position in the sky allows observations with ground-based observatories both in the northern and southern hemispheres. Here we report on long-term observations of HESS J0632+057 conducted with the VERITAS and H.E.S.S. Cherenkov Telescopes and the X-ray Satellite Swift, spanning a time range from 2004 to 2012 and covering most of the system's orbit. The VHE emission is found to be variable, and is correlated with that at X-ray energies. An orbital period of $315 ^{+6}_{-4}$ days is derived from the X-ray data set, which is compatible with previous results, $P = (321 \pm 5$) days. The VHE light curve shows a distinct maximum at orbital phases close to 0.3, or about 100 days after periastron passage, which coincides with the periodic enhancement of the X-ray emission. Furthermore, the analysis of the TeV data shows for the first time a statistically significant ($> 6.5 \sigma$) detection at orbital phases 0.6--0.9. The obtained gamma-ray and X-ray light curves and the correlation of the source emission at these two energy bands are discussed in the context of the recent ephemeris obtained for the system. Our results are compared to those reported for other gamma-ray binaries.

Catalog

Books, media, physical & digital resources
See catalog results