来自Fermi全天变源分析的耀发伽马射线源第二星表
高能天体物理现象
2017-09-13 v3
摘要
我们展示了利用Fermi全天变源分析(FAVA)探测到的耀发伽马射线源第二星表(2FAV),该工具对Fermi伽马射线空间望远镜上的大面积望远镜(LAT)观测的整个天空进行盲目的瞬变源搜索。与第一版FAVA星表相比,本星表受益于更大的数据集、最新的LAT数据发布(Pass 8),以及包含用于更精确定位瞬变源的似然技术的改进分析。将此分析应用于Fermi观测的前7.4年,并在0.10.8 GeV和0.8300 GeV两个独立能段中,在一周的时间尺度上共探测到454次显著性大于 (试验前)的耀发。通过对这些耀发进行空间聚类,识别出518个变伽马射线源。基于位置重合,为441个源找到了可能对应体,主要属于活动星系核中的耀变体类。对于77个2FAV源,未找到可能的伽马射线对应体。对于星表中的每个源,我们提供了每次耀发事件的时间、位置和光谱。研究耀发的光谱,我们观察到与耀变体相关的耀发表现出“越亮越硬”的行为,但在低能段探测到的BL Lac耀发除外。耀发的光子指数从未显著小于1.5。对于轻子模型,在各向同性假设下,该极限表明新加速电子的光谱从未硬于 2。
引用
@article{arxiv.1612.03165,
title = {The second catalog of flaring gamma-ray sources from the Fermi All-sky Variability Analysis},
author = {S. Abdollahi and M. Ackermann and M. Ajello and A. Albert and L. Baldini and J. Ballet and G. Barbiellini and D. Bastieri and J. Becerra Gonzalez and R. Bellazzini and E. Bissaldi and R. D. Blandford and E. D. Bloom and R. Bonino and E. Bottacini and J. Bregeon and P. Bruel and R. Buehler and S. Buson and R. A. Cameron and M. Caragiulo and P. A. Caraveo and E. Cavazzuti and C. Cecchi and A. Chekhtman and C. C. Cheung and G. Chiaro and S. Ciprini and J. Conrad and D. Costantin and F. Costanza and S. Cutini and F. D'Ammando and F. de Palma and A. Desai and R. Desiante and S. W. Digel and N. Di Lalla and M. Di Mauro and L. Di Venere and B. Donaggio and P. S. Drell and C. Favuzzi and S. J. Fegan and E. C. Ferrara and W. B. Focke and A. Franckowiak and Y. Fukazawa and S. Funk and P. Fusco and F. Gargano and D. Gasparrini and N. Giglietto and M. Giomi and F. Giordano and M. Giroletti and T. Glanzman and D. Green and I. A. Grenier and J. E. Grove and L. Guillemot and S. Guiriec and E. Hays and D. Horan and T. Jogler and G. Jóhannesson and A. S. Johnson and D. Kocevski and M. Kuss and G. La Mura and S. Larsson and L. Latronico and J. Li and F. Longo and F. Loparco and M. N. Lovellette and P. Lubrano and J. D. Magill and S. Maldera and A. Manfreda and M. Mayer and M. N. Mazziotta and P. F. Michelson and W. Mitthumsiri and T. Mizuno and M. E. Monzani and A. Morselli and I. V. Moskalenko and M. Negro and E. Nuss and T. Ohsugi and N. Omodei and M. Orienti and E. Orlando and V. S. Paliya and D. Paneque and J. S. Perkins and M. Persic and M. Pesce-Rollins and V. Petrosian and F. Piron and T. A. Porter and G. Principe and S. Rainò and R. Rando and M. Razzano and S. Razzaque and A. Reimer and O. Reimer and C. Sgrò and D. Simone and E. J. Siskind and F. Spada and G. Spandre and P. Spinelli and L. Stawarz and D. J. Suson and M. Takahashi and K. Tanaka and J. B. Thayer and D. J. Thompson and D. F. Torres and E. Torresi and G. Tosti and E. Troja and G. Vianello and K. S. Wood},
journal= {arXiv preprint arXiv:1612.03165},
year = {2017}
}
备注
Accepted for publication by The Astrophysical Journal Supplement. Online analysis results available at http://fermi.gsfc.nasa.gov/ssc/data/access/lat/FAVA/index.php . Corresponding authors: M. Giomi, R. Buehler, D. Kocevski, and M. Ajello