Detection of variable VHE gamma-ray emission from the extra-galactic gamma-ray binary LMC P3
Abstract
Context. Recently, the high-energy (HE, 0.1-100 GeV) -ray emission from the object LMC P3 in the Large Magellanic Cloud (LMC) has been discovered to be modulated with a 10.3-day period, making it the first extra-galactic -ray binary. Aims. This work aims at the detection of very-high-energy (VHE, >100 GeV) -ray emission and the search for modulation of the VHE signal with the orbital period of the binary system. Methods. LMC P3 has been observed with the High Energy Stereoscopic System (H.E.S.S.); the acceptance-corrected exposure time is 100 h. The data set has been folded with the known orbital period of the system in order to test for variability of the emission. Energy spectra are obtained for the orbit-averaged data set, and for the orbital phase bin around the VHE maximum. Results. VHE -ray emission is detected with a statistical significance of 6.4 . The data clearly show variability which is phase-locked to the orbital period of the system. Periodicity cannot be deduced from the H.E.S.S. data set alone. The orbit-averaged luminosity in the TeV energy range is erg/s. A luminosity of erg/s is reached during 20% of the orbit. HE and VHE -ray emissions are anti-correlated. LMC P3 is the most luminous -ray binary known so far.
Cite
@article{arxiv.1801.06322,
title = {Detection of variable VHE gamma-ray emission from the extra-galactic gamma-ray binary LMC P3},
author = {H. E. S. S. Collaboration and H. Abdalla and A. Abramowski and F. Aharonian and F. Ait Benkhali and E. O. Angüner and M. Arakawa and M. Arrieta and P. Aubert and M. Backes and A. Balzer and M. Barnard and Y. Becherini and J. Becker Tjus and D. Berge and S. Bernhard and K. Bernlöhr and R. Blackwell and M. Böttcher and C. Boisson and J. Bolmont and S. Bonnefoy and P. Bordas and J. Bregeon and F. Brun and P. Brun and M. Bryan and M. Büchele and T. Bulik and M. Capasso and S. Caroff and A. Carosi and S. Casanova and M. Cerruti and N. Chakraborty and R. C. G. Chaves and A. Chen and J. Chevalier and S. Colafrancesco and B. Condon and J. Conrad and I. D. Davids and J. Decock and C. Deil and J. Devin and P. deWilt and L. Dirson and A. Djannati-Ataï and W. Domainko and A. Donath and L. O'C. Drury and K. Dutson and J. Dyks and T. Edwards and K. Egberts and P. Eger and G. Emery and J. -P. Ernenwein and S. Eschbach and C. Farnier and S. Fegan and M. V. Fernandes and A. Fiasson and G. Fontaine and A. Förster and S. Funk and M. Füßling and S. Gabici and Y. A. Gallant and T. Garrigoux and F. Gaté and G. Giavitto and B. Giebels and D. Glawion and J. F. Glicenstein and D. Gottschall and M. -H. Grondin and J. Hahn and M. Haupt and J. Hawkes and G. Heinzelmann and G. Henri and G. Hermann and J. A. Hinton and W. Hofmann and C. Hoischen and T. L. Holch and M. Holler and D. Horns and A. Ivascenko and H. Iwasaki and A. Jacholkowska and M. Jamrozy and D. Jankowsky and F. Jankowsky and M. Jingo and L. Jouvin and I. Jung-Richardt and M. A. Kastendieck and K. Katarzyński and M. Katsuragawa and U. Katz and D. Kerszberg and D. Khangulyan and B. Khélifi and J. King and S. Klepser and D. Klochkov and W. Kluźniak and Nu. Komin and K. Kosack and S. Krakau and M. Kraus and P. P. Krüger and H. Laffon and G. Lamanna and J. Lau and J. -P. Lees and J. Lefaucheur and A. Lemière and M. Lemoine-Goumard and J. -P. Lenain and E. Leser and T. Lohse and M. Lorentz and R. Liu and R. López-Coto and I. Lypova and D. Malyshev and V. Marandon and A. Marcowith and C. Mariaud and R. Marx and G. Maurin and N. Maxted and M. Mayer and P. J. Meintjes and M. Meyer and A. M. W. Mitchell and R. Moderski and M. Mohamed and L. Mohrmann and K. Morå and E. Moulin and T. Murach and S. Nakashima and M. de Naurois and H. Ndiyavala and F. Niederwanger and J. Niemiec and L. Oakes and P. O'Brien and H. Odaka and S. Ohm and M. Ostrowski and I. Oya and M. Padovani and M. Panter and R. D. Parsons and N. W. Pekeur and G. Pelletier and C. Perennes and P. -O. Petrucci and B. Peyaud and Q. Piel and S. Pita and V. Poireau and H. Poon and D. Prokhorov and H. Prokoph and G. Pühlhofer and M. Punch and A. Quirrenbach and S. Raab and R. Rauth and A. Reimer and O. Reimer and M. Renaud and R. de los Reyes and F. Rieger and L. Rinchiuso and C. Romoli and G. Rowell and B. Rudak and C. B. Rulten and V. Sahakian and S. Saito and D. A. Sanchez and A. Santangelo and M. Sasaki and M. Schandri and R. Schlickeiser and F. Schüssler and A. Schulz and U. Schwanke and S. Schwemmer and M. Seglar-Arroyo and M. Settimo and A. S. Seyffert and N. Shafi and I. Shilon and K. Shiningayamwe and R. Simoni and H. Sol and F. Spanier and M. Spir-Jacob and Ł. Stawarz and R. Steenkamp and C. Stegmann and C. Steppa and I. Sushch and T. Takahashi and J. -P. Tavernet and T. Tavernier and A. M. Taylor and R. Terrier and L. Tibaldo and D. Tiziani and M. Tluczykont and C. Trichard and M. Tsirou and N. Tsuji and R. Tuffs and Y. Uchiyama and D. J. van der Walt and C. van Eldik and C. van Rensburg and B. van Soelen and G. Vasileiadis and J. Veh and C. Venter and A. Viana and P. Vincent and J. Vink and F. Voisin and H. J. Völk and T. Vuillaume and Z. Wadiasingh and S. J. Wagner and P. Wagner and R. M. Wagner and R. White and A. Wierzcholska and P. Willmann and A. Wörnlein and D. Wouters and R. Yang and D. Zaborov and M. Zacharias and R. Zanin and A. A. Zdziarski and A. Zech and F. Zefi and A. Ziegler and J. Zorn and N. Żywucka},
journal= {arXiv preprint arXiv:1801.06322},
year = {2018}
}
Comments
5 pages, 3 figures, 1 table, accepted for publication in A&A