Long-term TeV and X-ray Observations of the Gamma-ray Binary HESS J0632+057
High Energy Astrophysical Phenomena
2015-06-18 v1
Abstract
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 days is derived from the X-ray data set, which is compatible with previous results, ) 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 () 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.
Keywords
Cite
@article{arxiv.1311.6083,
title = {Long-term TeV and X-ray Observations of the Gamma-ray Binary HESS J0632+057},
author = {VERITAS Collaboration and E. Aliu and S. Archambault and T. Aune and B. Behera and M. Beilicke and W. Benbow and K. Berger and R. Bird and A. Bouvier and J. H. Buckley and V. Bugaev and K. Byrum and M. Cerruti and X. Chen and L. Ciupik and M. P. Connolly and W. Cui and C. Duke and J. Dumm and M. Errando and A. Falcone and S. Federici and Q. Feng and J. P. Finley and P. Fortin and L. Fortson and A. Furniss and N. Galante and G. H. Gillanders and S. Griffin and S. T. Griffiths and J. Grube and G. Gyuk and D. Hanna and J. Holder and G. Hughes and T. B. Humensky and P. Kaaret and M. Kertzman and Y. Khassen and D. Kieda and H. Krawczynski and F. Krennrich and M. J. Lang and A. S Madhavan and G. Maier and P. Majumdar and A. McCann and P. Moriarty and R. Mukherjee and D. Nieto and A. O'Faoláin de Bhróithe and R. A. Ong and A. N. Otte and N. Park and J. S. Perkins and M. Pohl and A. Popkow and H. Prokoph and J. Quinn and K. Ragan and J. Rajotte and L. C. Reyes and P. T. Reynolds and G. T. Richards and E. Roache and J. Rousselle and G. H. Sembroski and F. Sheidaei and C. Skole and A. W. Smith and D. Staszak and M. Stroh and I. Telezhinsky and M. Theiling and J. V. Tucci and J. Tyler and A. Varlotta and S. Vincent and S. P. Wakely and A. Weinstein and R. Welsing and D. A. Williams and A. Zajczyk and B. Zitzer and H. E. S. S. Collaboration and : and A. Abramowski and F. Aharonian and F. Ait Benkhali and A. G. Akhperjanian and E. Angüner and G. Anton and S. Balenderan and A. Balzer and A. Barnacka and Y. Becherini and J. Becker Tjus and K. Bernlöhr and E. Birsin and E. Bissaldi and J. Biteau and M. Böttcher and C. Boisson and J. Bolmont and P. Bordas and J. Brucker and F. Brun and P. Brun and T. Bulik and S. Carrigan and S. Casanova and M. Cerruti and P. M. Chadwick and R. Chalme-Calvet and R. C. G. Chaves and A. Cheesebrough and M. Chrétien and S. Colafrancesco and G. Cologna and J. Conrad and C. Couturier and M. Dalton and M. K. Daniel and I. D. Davids and B. Degrange and C. Deil and P. deWilt and H. J. Dickinson and A. Djannati-Ataï and W. Domainko and L. O'C. Drury and G. Dubus and K. Dutson and J. Dyks and M. Dyrda and T. Edwards and K. Egberts and P. Eger and P. Espigat and C. Farnier and S. Fegan and F. Feinstein and M. V. Fernandes and D. Fernandez and A. Fiasson and G. Fontaine and A. Forster and M. Füßling and M. Gajdus and Y. A. Gallant and T. Garrigoux and G. Giavitto and B. Giebels and J. F. Glicenstein and M. -H. Grondin and M. Grudzińska and S. Häffner and J. Hahn and J. Harris and G. Heinzelmann and G. Henri and G. Hermann and O. Hervet and A. Hillert and J. A. Hinton and W. Hofmann and P. Hofverberg and M. Holler and D. Horns and A. Jacholkowska and C. Jahn and M. Jamrozy and M. Janiak and F. Jankowsky and I. Jung and M. A. Kastendieck and K. Katarzyński and U. Katz and S. Kaufmann and B. Khélifi and M. Kieffer and S. Klepser and D. Klochkov and W. Kluźniak and T. Kneiske and D. Kolitzus and Nu. Komin and K. Kosack and S. Krakau and F. Krayzel and P. P. Krüger and H. Laffon and G. Lamanna and J. Lefaucheur and A. Lemiére and M. Lemoine-Goumard and J. -P. Lenain and D. Lennarz and T. Lohse and A. Lopatin and C. -C. Lu and V. Marandon and A. Marcowith and R. Marx and G. Maurin and N. Maxted and M. Mayer and T. J. L. McComb and J. Méhault and U. Menzler and M. Meyer and R. Moderski and M. Mohamed and E. Moulin and T. Murach and C. L. Naumann and M. de Naurois and J. Niemiec and S. J. Nolan and L. Oakes and S. Ohm and E. de Onña Wilhelmi and B. Opitz and M. Ostrowski and I. Oya and M. Panter and R. D. Parsons and M. Paz Arribas and N. W. Pekeur and G. Pelletier and J. Perez and P. -O. Petrucci and B. Peyaud and S. Pita and H. Poon and G. Pühlhofer and M. Punch and A. Quirrenbach and S. Raab and M. Raue and A. Reimer and O. Reimer and M. Renaud and R. de los Reyes and F. Rieger and L. Rob and C. Romoli and S. Rosier-Lees and G. Rowell and B. Rudak and C. B. Rulten and V. Sahakian and D. A. Sanchez and A. Santangelo and R. Schlickeiser and F. Schüssler and A. Schulz and U. Schwanke and S. Schwarzburg and S. Schwemmer and H. Sol and G. Spengler and F. Spies and Ł. Stawarz and R. Steenkamp and C. Stegmann and F. Stinzing and K. Stycz and I. Sushch and A. Szostek and J. -P. Tavernet and T. Tavernier and A. M. Taylor and R. Terrier and M. Tluczykont and C. Trichard and K. Valerius and C. van Eldik and G. Vasileiadis and C. Venter and A. Viana and P. Vincent and H. J. Völk and F. Volpe and M. Vorster and S. J. Wagner and P. Wagner and M. Ward and M. Weidinger and Q. Weitzel and R. White and A. Wierzcholska and P. Willmann and A. Wörnlein and D. Wouters and M. Zacharias and A. Zajczyk and A. A. Zdziarski and A. Zech and H. -S. Zechlin},
journal= {arXiv preprint arXiv:1311.6083},
year = {2015}
}
Comments
35 pages, 8 figures, accepted for publication in ApJ