多波段背景下的 MAGIC 对 AE Aquarii 甚高能 $\gamma$ 射线辐射的搜寻
摘要
据称，类新星激变变星（CV）AE Aquarii（AE Aqr）在观测和理论上均是一个甚高能（VHE, 100 GeV）源。我们旨在搜寻 AE Aqr 在不同状态下于多个波段的甚高能伽马射线辐射，以确认或排除先前关于该物体伽马射线辐射探测的主张。我们报告了由 MAGIC 进行的 AE Aqr 观测结果。该源作为 2012 年 5 月至 6 月期间开展的多波段活动的一部分被观测了 12 小时，覆盖了光学、X 射线和伽马射线波段。除 MAGIC 外，其他参与的设施还包括光段的 KVA、Skinakas 和 Vidojevica 望远镜，以及 X 射线段的 Swift。我们计算了与光学不同状态一致的积分上限。我们将信号区域限制在相位图的 30% 以内，计算了脉冲辐射的上限，并应用 Rayleigh 检验搜寻了不同频率下的脉冲辐射。在多波段活动期间，未在 VHE 能段探测到 AE Aqr。我们假设微分通量与幂律函数 d\phi/dE \propto E^{-Gamma} 成正比，且具有类似 Crab 的光子谱指数 Gamma=2.6，确立了稳态辐射在 95\% 置信水平下的积分上限。200 GeV 以上的上限为 6.4\times10^{-12} cm^{-2}s^{-1}，1 TeV 以上的上限为 7.4\times10^{-13} cm^{-2}s^{-1}。我们获得了 200 GeV 以上能量脉冲辐射的上限为 2.6\times10^{-12} cm^{-2}s^{-1}。应用 Rayleigh 检验搜寻不同频率下的脉冲辐射时，未发现任何显著信号。我们的结果表明，AE Aqr 并非此前声称辐射水平下的 VHE 伽马射线发射源。我们已确立了针对 AE Aqr VHE 伽马射线辐射最严格的上限。
引用
@article{arxiv.1407.3707,
title = {MAGIC search for VHE $\gamma$-ray emission from AE Aquarii in a multiwavelength context},
author = {J. Aleksić and S. Ansoldi and L. A. Antonelli and P. Antoranz and A. Babic and P. Bangale and J. A. Barrio and J. Becerra González and W. Bednarek and E. Bernardini and B. Biasuzzi and A. Biland and O. Blanch and S. Bonnefoy and G. Bonnoli and F. Borracci and T. Bretz and E. Carmona and A. Carosi and P. Colin and E. Colombo and J. L. Contreras and J. Cortina and S. Covino and P. Da Vela and F. Dazzi and A. De Angelis and G. De Caneva and B. De Lotto and E. de Oña Wilhelmi and C. Delgado Mendez and M. Doert and D. Dominis Prester and D. Dorner and M. Doro and S. Einecke and D. Eisenacher and D. Elsaesser and M. V. Fonseca and L. Font and K. Frantzen and C. Fruck and D. Galindo and R. J. García López and M. Garczarczyk and D. Garrido Terrats and M. Gaug and N. Godinović and A. González Muñoz and S. R. Gozzini and D. Hadasch and Y. Hanabata and M. Hayashida and J. Herrera and D. Hildebrand and J. Hose and D. Hrupec and W. Idec and V. Kadenius and H. Kellermann and K. Kodani and Y. Konno and J. Krause and H. Kubo and J. Kushida and A. La Barbera and D. Lelas and N. Lewandowska and E. Lindfors and S. Lombardi and M. López and R. López-Coto and A. López-Oramas and E. Lorenz and I. Lozano and M. Makariev and K. Mallot and G. Maneva and N. Mankuzhiyil and K. Mannheim and L. Maraschi and B. Marcote and M. Mariotti and M. Martínez and D. Mazin and U. Menzel and J. M. Miranda and R. Mirzoyan and A. Moralejo and P. Munar-Adrover and D. Nakajima and A. Niedzwiecki and K. Nilsson and K. Nishijima and K. Noda and N. Nowak and R. Orito and A. Overkemping and S. Paiano and M. Palatiello and D. Paneque and R. Paoletti and J. M. Paredes and X. Paredes-Fortuny and M. Persic and P. G. Prada Moroni and E. Prandini and S. Preziuso and I. Puljak and R. Reinthal and W. Rhode and M. Ribó and J. Rico and J. Rodriguez Garcia and S. Rügamer and A. Saggion and T. Saito and K. Saito and K. Satalecka and V. Scalzotto and V. Scapin and C. Schultz and T. Schweizer and A. Sillanpää and J. Sitarek and I. Snidaric and D. Sobczynska and F. Spanier and V. Stamatescu and A. Stamerra and T. Steinbring and J. Storz and M. Strzys and L. Takalo and H. Takami and F. Tavecchio and P. Temnikov and T. Terzić and D. Tescaro and M. Teshima and J. Thaele and O. Tibolla and D. F. Torres and T. Toyama and A. Treves and M. Uellenbeck and P. Vogler and R. M. Wagner and R. Zanin and M. Bogosavljevic and Z. Ioannou and C. W. Mauche and E. V. Palaiologou and M. A. Pérez-Torres and T. Tuominen},
journal= {arXiv preprint arXiv:1407.3707},
year = {2014}
}
备注
9 pages, 5 figures. Accepted for publication in A&A