Incremental Fermi Large Area Telescope Fourth Source Catalog
LAT collaboration, Soheila Abdollahi, Fabio Acero, Luca Baldini, Jean Ballet, Denis Bastieri, Ronaldo Bellazzini, Bijan Berenji, Alessandra Berretta, Elisabetta… 展开作者
LAT collaboration, Soheila Abdollahi, Fabio Acero, Luca Baldini, Jean Ballet, Denis Bastieri, Ronaldo Bellazzini, Bijan Berenji, Alessandra Berretta, Elisabetta Bissaldi, Roger D. Blandford, Elliott Bloom, Raffaella Bonino, Ari Brill, Richard J. Britto, Philippe Bruel, Toby H. Burnett, Sara Buson, Rob A. Cameron, Regina Caputo, Patrizia A. Caraveo, Daniel Castro, Sylvain Chaty, Teddy C. Cheung, Graziano Chiaro, Nicolo Cibrario, Stefano Ciprini, Javier Coronado-Blazquez, Milena Crnogorcevic, Sara Cutini, Filippo D'Ammando, Salvatore De Gaetano, Seth W. Digel, Niccolo Di Lalla, Feraol F. Dirirsa, Leonardo Di Venere, Alberto Dominguez, Vandad Fallah Ramazani, Stephen J. Fegan, Elizabeth C. Ferrara, Alessio Fiori, Henrike Fleischhack, Anna Franckowiak, Yasushi Fukazawa, Stefan Funk, Piergiorgio Fusco, Giorgio Galanti, Viviana Gammaldi, Fabio Gargano, Simone Garrappa, Dario Gasparrini, Federica Giacchino, Nico Giglietto, Francesco Giordano, Marcello Giroletti, Thomas Glanzman, David Green, Isabelle A. Grenier, Marie-Helene Grondin, Lucas Guillemot, Sylvain Guiriec, Michael Gustafsson, Alice K. Harding, Liz Hays, John W. Hewitt, Deirdre Horan, Xian Hou, Gudlaugur Johannesson, Christopher M. Karwin, Taishu Kayanoki, Matthew T. Kerr, Michael Kuss, David Landriu, Stefan Larsson, Luca Latronico, Marianne Lemoine-Goumard, Jian Li, Ioannis Liodakis, Francesco Longo, Francesco Loparco, Benoit Lott, Pasquale Lubrano, Simone Maldera, Dmitry Malyshev, Alberto Manfreda, Guillem Marti-Devesa, Mario N. Mazziotta, Isabella Mereu, Manuel Meyer, Peter F. Michelson, Nestor Mirabal, Warit Mitthumsiri, Tsunefumi Mizuno, Alex A. Moiseev, Maria E. Monzani, Aldo Morselli, Igor V. Moskalenko, Michela Negro, Eric Nuss, Nicola Omodei, Monica Orienti, Elena Orlando, David Paneque, Zhiyuan Pei, Jeremy S. Perkins, Massimo Persic, Melissa Pesce-Rollins, Vahe Petrosian, Roberta Pillera, Helen Poon, Troy A. Porter, Giacomo Principe, Silvia Raino, Riccardo Rando, Bindu Rani, Massimiliano Razzano, Soebur Razzaque, Anita Reimer, Olaf Reimer, Thierry Reposeur, Miguel A. Sanchez-Conde, Pablo M. Saz Parkinson, Lorenzo Scotton, Davide Serini, Carmelo Sgro, Eric J. Siskind, David A. Smith, Gloria Spandre, Paolo Spinelli, Kohei Sueoka, Dan J. Suson, Hiro Tajima, Dongguen Tak, Jana B. Thayer, David J. Thompson, Diego F. Torres, Eleonora Troja, Janeth Valverde, Kent Wood, Gabrijela Zaharijas
We present an incremental version (4FGL-DR3, for Data Release 3) of the fourth Fermi-LAT catalog of gamma-ray sources. Based on the first twelve years of science data in the energy range from 50 MeV to 1 TeV, it contains 6658 sources. The analysis improves on that used for the 4FGL catalog over eight years of data: more sources are fit with curved spectra, we introduce a more robust spectral parameterization for pulsars, and we extend the spectral points to 1 TeV. The spectral parameters, spectral energy distributions, and associations are updated for all sources. Light curves are rebuilt for all sources with 1 yr intervals (not 2 month intervals). Among the 5064 original 4FGL sources, 16 were deleted, 112 are formally below the detection threshold over 12 yr (but are kept in the list), while 74 are newly associated, 10 have an improved association, and seven associations were withdrawn. Pulsars are split explicitly between young and millisecond pulsars. Pulsars and binaries newly detected in LAT sources, as well as more than 100 newly classified blazars, are reported. We add three extended sources and 1607 new point sources, mostly just above the detection threshold, among which eight are considered identified, and 699 have a plausible counterpart at other wavelengths. We discuss degree-scale residuals to the global sky model and clusters of soft unassociated point sources close to the Galactic plane, which are possibly related to limitations of the interstellar emission model and missing extended sources.
4FHL: The Fourth Catalog of Hard Fermi-LAT Sources
Université Paris-Saclay（巴黎萨克雷大学）；Université Paris Cité（巴黎西岱大学）；CEA（法国原子能暨替代能源委员会）；CNRS（法国国家科学研究中心）；FSLAC IRL 2009（中法天文卫星联合实验室）；IAC（加那利天体物理研究所）；Istituto Nazionale di Fisica Nucleare, Sezione di Perugia（意大利国家核物理研究院佩鲁吉亚分部）；Department of Physics and Astronomy, Clemson University（克莱姆森大学物理与天文系）；Dipartimento di Fisica, Università di Trieste（的里雅斯特大学物理系）；Istituto Nazionale di Fisica Nucleare, Sezione di Trieste（意大利国家核物理研究院的里雅斯特分部）；Università di Pisa, Dipartimento di Fisica E. Fermi（比萨大学E.费米物理系）；Istituto Nazionale di Fisica Nucleare, Sezione di Pisa（意大利国家核物理研究院比萨分部）；Istituto Nazionale di Fisica Nucleare, Sezione di Bari（意大利国家核物理研究院巴里分部）；Università degli studi di Trento（特伦托大学）；Instituto de Astrofísica de Canarias（加那利天体物理研究所）；Universidad de La Laguna（拉帕拉斯大学）
The Fourth HAWC Catalog of Very-High-Energy Gamma-Ray Sources
Instituto de Física, Universidad Nacional Autónoma de México（墨西哥国立自治大学物理研究所）；Universidad Autónoma de Chiapas（恰帕斯自治大学）；Instituto de Astronomía, Universidad Nacional Autónoma de México（墨西哥国立自治大学天体物理研究所）；Universidad de Costa Rica（哥斯达黎加大学）；Universidad Michoacana de San Nicolás de Hidalgo（米却肯圣尼古拉斯德伊达尔戈大学）；Temple University（天普大学）；Instituto Nacional de Astrofísica, Óptica y Electrónica（国家天体物理学、光学和电子学研究所）；Institute of Nuclear Physics Polish Academy of Sciences（波兰科学院核物理研究所）
Université Paris Saclay and Université Paris Cité, CEA, CNRS, AIM（巴黎萨克雷大学与巴黎西岱大学）；LLR, CNRS/IN2P3, École polytechnique, Institut Polytechnique de Paris（巴黎理工学院）；Department of Physics, University of Washington（华盛顿大学物理系）；Université Bordeaux, CNRS, LP2I Bordeaux, UMR 5797（波尔多大学）
Harnessing the XMM-Newton data: X-ray spectral modelling of 4XMM-DR11 detections and 4XMM-DR11s sources
INAF–Osservatorio Astronomico di Roma（意大利国家天体物理研究所罗马天文台）；Department of Physics, University of Helsinki（赫尔辛基大学物理系）；Instituto de Física de Cantabria (CSIC-Universidad de Cantabria)（坎塔布里亚物理研究所（西班牙科学研究中心-坎塔布里亚大学））；Juelich Supercomputing Centre, Forschungszentrum Juelich GmbH（于利希超级计算中心，于利希研究中心有限公司）；Université Paris Saclay and Université Paris Cité, CEA, CNRS, AIM（巴黎萨克雷大学和巴黎西岱大学，法国原子能和替代能源委员会，法国国家科学研究中心，天体物理学与分子生物学研究所）；Institute for Astronomy Astrophysics Space Applications and Remote Sensing (IAASARS), National Observatory of Athens（雅典国立天文台天文学、天体物理学、空间应用和遥感研究所）；Max-Planck-Institut für extraterrestrische Physik（马克斯·普朗克地外物理学研究所）
Classification of a New X-ray Catalog of Likely Counterparts to 4FGL-DR4 Unassociated Gamma-ray Sources Using a Neural Network
Pennsylvania State University（宾夕法尼亚州立大学）；Michigan State University（密歇根州立大学）；University of Maryland, College Park（马里兰大学帕克分校）；NASA Goddard Space Flight Center（美国宇航局戈达德太空飞行中心）；U.S. Naval Research Laboratory（美国海军研究实验室）
Artificial Neural Network Classification of 4FGL Sources
费米-LAT DR 1和DR 2 4FGL星表中有超过5000个伽马射线源，其中约四分之一与已知天体无关，约三分之一与性质不确定的耀变体有关。我们独立地对4FGL DR 1和DR 2源进行三类分类，使用人工神经网络（ANN）的集成来根据脉冲星（PSR），BL Lac型耀变体（BLL）或平谱射电类星体（FSRQ）的可能性对它们进行分类。我们确定候选PSR，BLL和FSRQ之间的无关联的来源与三个类别之间的近似均分，并选择十个分类离群值作为后续研究的潜在兴趣。
A new look at the extragalactic Very High Energy sky: searching for TeV-emitting candidates among the X-ray bright, non-Fermi detected blazar population
Optical spectroscopic observations of gamma-ray blazar candidates. X. Results from the 2018--2019 SOAR and OAN-SPM observations of blazar candidates of uncertain type
Cross-correlation of the 2XMMi catalogue with Data Release 7 of the Sloan Digital Sky Survey
XMM-牛顿卫星的测量科学中心于2008年8月发布了2XMM目录的第一个增量版本。2XMMi拥有超过220，000个X射线源，是当时出版的最大的X射线源目录，因此构成了研究活动星系核和恒星等各类X射线发射体高能特性的前所未有的资源。斯隆数字巡天第七版的出现提供了交叉匹配两个主要巡天的机会，并将许多2XMMi源的光谱能量分布扩展到光学波段。本文提出了一种基于经典似然比估计的交叉匹配算法。该方法的优点是提供真正的概率识别，而不诉诸蒙特卡罗模拟。超过30，000个2XMMi源具有SDSS对应物，其个体识别概率高于90%。使用光谱鉴定从SDSS DR 7目录补充提取从其他目录中，我们建立了一个识别的样本，从该样本中可以分析各种类别的X射线发射体在多维参数空间中的聚集方式。我们研究了两个科学用例。在第一个例子中，我们展示了如何使用这些多波长数据来搜索新的类星体2。虽然没有具体的范围内观察到的属性，让我们来确定康普顿厚类星体，我们表明，前景要好得多的康普顿薄AGN 2，并讨论了几种可能的多参数选择策略。在第二个例子中，我们在500多颗X射线活跃恒星的样本中确认了平均X射线光谱随着X射线亮度的增加而硬化，并揭示了平均而言，X射线活跃的M星显示出比不太活跃的恒星更蓝的$g-r$颜色指数（删节）。
Using Neural Networks to Differentiate Newly Discovered BL Lacs and FSRQs among the 4FGL Unassociated Sources Employing Gamma-ray, X-ray, UV/Optical and IR Data
