Open Universe survey of Swift -XRT GRB fields: Flux-limited sample of HBL blazars

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.Fil: Giommi, Paolo. Associated to the Italian Space Agency; Italia. International Center for Relativistic Astrophysics Network; Italia. Technische Universitat München; AlemaniaFil: Chang, Y. L.. Shanghai Jiao Tong University; ChinaFil: Turriziani, Sara. Gubkin Russian State University; RusiaFil: Glauch, T.. Technische Universitat München; AlemaniaFil: Leto, C.. Agenzia Spaziale Italiana; ItaliaFil: Verrecchia, F.. Osservatorio Astronomico Di Roma; Italia. Agenzia Spaziale Italiana; ItaliaFil: Padovani, P.. European Southern Observatory; ItaliaFil: Penacchioni, Ana Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Arneodo, F.. Nyu Abu Dhabi; Emiratos Arabes UnidosFil: Barres De Almeida, U.. International Center For Relativistic Astrophysics; Italia. Centro Brasileiro de Pesquisas Físicas; BrasilFil: Brandt, C. H.. Jacobs University Bremen; AlemaniaFil: Capalbi, María Florencia. Istituto Nazionale di Astrofísica. Osservatorio Astronómico di Palermo; ItaliaFil: Civitarese, Enrique Osvaldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: D'Elia, V.. Agenzia Spaziale Italiana; Italia. Osservatorio Astronomico Di Roma; ItaliaFil: Di Giovanni, A.. Nyu Abu Dhabi; Emiratos Arabes UnidosFil: De Angelis, M.. Agenzia Spaziale Italiana; ItaliaFil: Del Rio Vera, J.. United Nations Office For Outer Space Affairs; AustriaFil: Di Pippo, S.. United Nations Office For Outer Space Affairs; AustriaFil: Middei, Riccardo. Osservatorio Astronomico Di Roma; ItaliaFil: Perri, M.. Osservatorio Astronomico Di Roma; ItaliaFil: Pollock, A. M. T.. The University Of Sheffield; Reino UnidoFil: Puccetti, S.. Agenzia Spaziale Italiana; ItaliaFil: Ricard, N.. United Nations Office For Outer Space Affairs; AustriaFil: Ruffini, Remo. International Center For Relativistic Astrophysics; ItaliaFil: Sahakyan, Narek. International Center For Relativistic Astrophysics; Italia. International Center for Relativistic Astrophysics Network; Armeni