Mrk 421在2015–2016年历史低X射线与$\gamma$射线活动期间的多波段变率与相关性研究
高能天体物理现象
2021-05-26 v1
摘要
我们报道利用Metsähovi、Swift、Fermi-LAT、MAGIC、FACT及其他合作与仪器自2014年11月至2016年6月的数据，对近邻（z=0.031）耀变体Markarian 421（Mrk 421）的多波段流量变率与相关性刻画。Mrk 421未显现显著耀发活动，但在高于1 TeV（F 1.710 ph cm s）与2–10 keV（X射线）波段（F3.610 erg cm s）表现出历史低活动期，期间Swift-BAT数据提示存在超出常规同步辐射的额外谱成分。最高流量变率出现在X射线与甚高能（E0.1 TeV）射线中，二者虽处低活动期仍显示无时滞的显著正相关。HR与HR呈现许多耀变体观测到的亮则更硬趋势，但该趋势在最高流量处变平，暗示主导耀变体变率的过程发生变化。以2007至2014年数据扩充数据集后，我们测得在零时滞为中心约60天范围内光学与GeV辐射的正相关，以及光学/GeV与射电辐射在43天为中心约60天范围内的正相关。该观测与射电亮区位于喷流光学/GeV辐射区下游约0.2秒差距一致。多数被探测能段的流量分布更宜用对数正态函数描述，表明Mrk 421变率可能由乘性过程产生。
引用
@article{arxiv.2012.01348,
title = {Multiwavelength variability and correlation studies of Mrk 421 during historically low X-ray and $\gamma$-ray activity in 2015$-$2016},
author = {MAGIC Collaboration and V. A. Acciari and S. Ansoldi and L. A. Antonelli and K. Asano and A. Babić and B. Banerjee and A. Baquero and U. Barres de Almeida and J. A. Barrio and J. Becerra González and W. Bednarek and L. Bellizzi and E. Bernardini and M. Bernardos and A. Berti and J. Besenrieder and W. Bhattacharyya and C. Bigongiari and O. Blanch and G. Bonnoli and Ž. Bošnjak and G. Busetto and R. Carosi and G. Ceribella and M. Cerruti and Y. Chai and A. Chilingarian and S. Cikota and S. M. Colak and E. Colombo and J. L. Contreras and J. Cortina and S. Covino and G. D'Amico and V. D'Elia and P. Da Vela and F. Dazzi and A. De Angelis and B. De Lotto and M. Delfino and J. Delgado and C. Delgado Mendez and D. Depaoli and T. Di Girolamo and F. Di Pierro and L. Di Venere and E. Do Souto Espiñeira and D. Dominis Prester and A. Donini and M. Doro and V. Fallah Ramazani and A. Fattorini and G. Ferrara and L. Foffano and M. V. Fonseca and L. Font and C. Fruck and S. Fukami and R. J. García López and M. Garczarczyk and S. Gasparyan and M. Gaug and N. Giglietto and F. Giordano and P. Gliwny and N. Godinović and J. G. Green and D. Green and D. Hadasch and A. Hahn and L. Heckmann and J. Herrera and J. Hoang and D. Hrupec and M. Hütten and T. Inada and S. Inoue and K. Ishio and Y. Iwamura and J. Jormanainen and L. Jouvin and Y. Kajiwara and M. Karjalainen and D. Kerszberg and Y. Kobayashi and H. Kubo and J. Kushida and A. Lamastra and D. Lelas and F. Leone and E. Lindfors and S. Lombardi and F. Longo and M. López and R. López-Coto and A. López-Oramas and S. Loporchio and B. Machado de Oliveira Fraga and C. Maggio and P. Majumdar and M. Makariev and M. Mallamaci and G. Maneva and M. Manganaro and L. Maraschi and M. Mariotti and M. Martínez and D. Mazin and S. Mender and S. Mićanović and D. Miceli and T. Miener and M. Minev and J. M. Miranda and R. Mirzoyan and E. Molina and A. Moralejo and D. Morcuende and V. Moreno and E. Moretti and P. Munar-Adrover and V. Neustroev and C. Nigro and K. Nilsson and D. Ninci and K. Nishijima and K. Noda and S. Nozaki and Y. Ohtani and T. Oka and J. Otero-Santos and M. Palatiello and D. Paneque and R. Paoletti and J. M. Paredes and L. Pavletić and P. Peñil and C. Perennes and M. Persic and P. G. Prada Moroni and E. Prandini and C. Priyadarshi and I. Puljak and W. Rhode and M. Ribó and J. Rico and C. Righi and A. Rugliancich and L. Saha and N. Sahakyan and T. Saito and S. Sakurai and K. Satalecka and B. Schleicher and K. Schmidt and T. Schweizer and J. Sitarek and I. Šnidarić and D. Sobczynska and A. Spolon and A. Stamerra and D. Strom and M. Strzys and Y. Suda and T. Surić and M. Takahashi and F. Tavecchio and P. Temnikov and T. Terzić and M. Teshima and N. Torres-Albà and L. Tosti and S. Truzzi and J. van Scherpenberg and G. Vanzo and M. Vazquez Acosta and S. Ventura and V. Verguilov and C. F. Vigorito and V. Vitale and I. Vovk and M. Will and D. Zarić and FACT collaboration and : and A. Arbet-Engels and D. Baack and M. Balbo and M. Beck and N. Biederbeck and A. Biland and T. Bretz and K. Bruegge and J. Buss and D. Dorner and D. Elsaesser and D. Hildebrand and R. Iotov and M. Klinger and K. Mannheim and D. Neise and A. Neronov and M. Noethe and A. Paravac and W. Rhode and B. Schleicher and V. Sliusar and F. Theissen and R. Walter and MWL Collaborators and : and J. Valverde and D. Horan and M. Giroletti and M. Perri and F. Verrecchia and C. Leto and A. C. Sadun and J. W. Moody and M. Joner and A. P. Marscher and S. G. Jorstad and A. Lähteenmäki and M. Tornikoski and V. Ramakrishnan and E. Järvelä and R. J. C. Vera and S. Righini and A. Y. Lien},
journal= {arXiv preprint arXiv:2012.01348},
year = {2021}
}
备注
45 pages, 30 figures, 6 tables, accepted for publication in MNRAS