Volume 642, October 2020
|Number of page(s)||9|
|Section||Catalogs and data|
|Published online||13 October 2020|
Open Universe survey of Swift-XRT GRB fields: Flux-limited sample of HBL blazars⋆
Institute for Advanced Study, Technische Universität München, Lichtenbergstrasse 2a, 85748 Garching bei München, Germany
2 Associated to the Italian Space Agency, ASI, Via del Politecnico snc, 00133 Roma, Italy
3 ICRANet, P.zza della Repubblica 10, 65122 Pescara, Italy
4 Tsung-Dao Lee Institute, Shanghai Jiao Tong University, 800 Dongchuan RD. Minhang District, Shanghai, PR China
5 Physics Department, Gubkin Russian State University (National Research University), 65 Leninsky Prospekt, Moscow 119991, Russian Federation
6 Italian Space Agency, ASI, Via del Politecnico snc, 00133 Roma, Italy
7 Space Science Data Center, SSDC, ASI, Via del Politecnico snc, 00133 Roma, Italy
8 INAF – Osservatorio Astronomico di Roma, Via Frascati 33, 00040 Monteporzio Catone, Italy
9 European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany
10 Institute of Physics. IFLP-CONICET, Diag 113 e/63-64.(1900), La Plata, Argentina
11 New York University Abu Dhabi, Abu Dhabi, UAE
12 Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud 150, 22290-180 Rio de Janeiro, Brazil
13 Jacobs University, Physics and Earth Sciences, Campus Ring 1, 28759 Bremen, Germany
14 INAF – Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo, Via Ugo La Malfa 153, 90146 Palermo, Italy
15 Department of Physics, University of La Plata. 49 and 115.C.C.67 (1900), La Plata, Argentina
16 United Nations Office for Outer Space Affairs, UNOOSA, Vienna, Austria
17 Department of Physics and Astronomy, University of Sheffield, Hounsfield Road, Sheffield S3 7RH, UK
18 ICRANet-Armenia, Marshall Baghramian Avenue 24a, Yerevan 0019, Armenia
Accepted: 3 July 2020
Aims. The sample of serendipitous sources detected in all Swift-XRT images pointing at gamma ray bursts (GRBs) constitutes the largest existing medium-deep survey of the X-ray sky. To build such dataset we analysed all Swift X-ray images centred on GRBs and observed over a period of 15 years using automatic tools that do not require any expertise in X-ray astronomy. Besides presenting a new large X-ray survey and a complete sample of blazars, this work aims to be a step in the direction of achieving the ultimate goal of the Open Universe Initiative, which is to enable non-expert people to benefit fully from space science data, possibly extending the potential for scientific discovery, which is currently confined within a small number of highly specialised teams, to a much larger population.
Methods. We used the Swift_deepsky Docker container encapsulated pipeline to build the largest existing flux-limited and unbiased sample of serendipitous X-ray sources. Swift_deepsky runs on any laptop or desktop computer with a modern operating system. The tool automatically downloads the data and the calibration files from the archives, runs the official Swift analysis software, and produces a number of results including images, the list of detected sources, X-ray fluxes, spectral energy distribution data, and spectral slope estimations.
Results. We used our source list to build the LogN-LogS of extra-galactic sources, which perfectly matches that estimated by other satellites. Combining our survey with multi-frequency data, we selected a complete radio-flux-density-limited sample of high energy peaked blazars (HBL). The LogN-LogS built with this data set confirms that previous samples are incomplete below ∼20 mJy.
Key words: surveys / methods: data analysis / galaxies: active / X-rays: galaxies / catalogs
The catalogue is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (220.127.116.11) or via http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/642/A141
© ESO 2020
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