Journal Article

PUBDB-2024-07629

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The SRG/eROSITA all-sky survey - First X-ray catalogues and data release of the western Galactic hemisphere

Merloni, A. ; Lamer, G. ; Liu, T. ; Ramos-Ceja, M. E. ; Brunner, H. ; Bulbul, E. ; Dennerl, K. ; Doroshenko, V. ; Freyberg, M. J. ; Friedrich, S. ; Gatuzz, E. ; Georgakakis, A. ; Haberl, F. ; Igo, Z. ; Kreykenbohm, I. ; Liu, A. ; Maitra, C. ; Malyali, A. ; Mayer, M. G. F. ; Nandra, K. ; Predehl, P. ; Robrade, J. ; Salvato, M. ; Sanders, J. S. ; Stewart, I. ; Tubín-Arenas, D. ; Weber, P. ; Wilms, J. ; Arcodia, R. ; Artis, E. ; Aschersleben, J. ; Avakyan, A. ; Aydar, C. ; Bahar, Y. E. ; Balzer, F. ; Becker, W. ; Berger, K. ; Boller, T. ; Bornemann, W. ; Brüggen, M. ; Brusa, M. ; Buchner, J. ; Burwitz, V. ; Camilloni, F. ; Clerc, N. ; Comparat, J. ; Coutinho, D. ; Czesla, S. ; Dannhauer, S. M. ; Dauner, L. ; Dauser, T. ; Dietl, J. ; Dolag, K. ; Dwelly, T. ; Egg, K. ; Ehl, E. ; Freund, S. ; Friedrich, P. ; Gaida, R. ; Garrel, C. ; Ghirardini, V. ; Gokus, A. ; Grünwald, G. ; Grandis, S. ; Grotova, I. ; Gruen, D. ; Gueguen, A. ; Hämmerich, S. ; Hamaus, N. ; Hasinger, G. G.DESY* ; Haubner, K. ; Homan, D. ; Chitham, J. I. ; Joseph, W. M. ; Joyce, A. ; König, O. ; Kaltenbrunner, D. M. ; Khokhriakova, A. ; Kink, W. ; Kirsch, C. ; Kluge, M. ; Knies, J. ; Krippendorf, S. ; Krumpe, M. ; Kurpas, J. ; Li, P. ; Liu, Z. ; Locatelli, N. ; Lorenz, M. ; Müller, S. ; Magaudda, E. ; Mannes, C. ; McCall, H. ; Meidinger, N. ; Michailidis, M. ; Migkas, K. ; Muñoz-Giraldo, D. ; Musiimenta, B. ; Nguyen-Dang, N. T. ; Ni, Q. ; Olechowska, A. ; Ota, N. ; Pacaud, F. ; Pasini, T. ; Perinati, E. ; Pires, A. M. ; Pommranz, C. ; Ponti, G. ; Poppenhaeger, K. ; Pühlhofer, G. ; Rau, A. ; Reh, M. ; Reiprich, T. H. ; Roster, W. ; Saeedi, S. ; Santangelo, A. ; Sasaki, M. ; Schmitt, J. ; Schneider, P. C. ; Schrabback, T. ; Schuster, N. ; Schwope, A. ; Seppi, R. ; Serim, M. M. ; Shreeram, S. ; Sokolova-Lapa, E. ; Starck, H. ; Stelzer, B. ; Stierhof, J. ; Suleimanov, V. ; Tenzer, C. ; Traulsen, I. ; Trümper, J. ; Tsuge, K. ; Urrutia, T. ; Veronica, A. ; Waddell, S. G. H. ; Willer, R. ; Wolf, J. ; Yeung, M. C. H. ; Zainab, A. ; Zangrandi, F. ; Zhang, X. ; Zhang, Y. ; Zheng, X.

2024
EDP Sciences Les Ulis

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Please use a persistent id in citations: doi:10.1051/0004-6361/202347165

Report No.: arXiv:2401.17274

Abstract: The eROSITA telescope array aboard the Spektrum Roentgen Gamma (SRG) satellite began surveying the sky in December 2019, withthe aim of producing all-sky X-ray source lists and sky maps of an unprecedented depth. Here we present catalogues of both point-likeand extended sources using the data acquired in the first six months of survey operations (eRASS1; completed June 2020) over the halfsky whose proprietary data rights lie with the German eROSITA Consortium. We describe the observation process, the data analysispipelines, and the characteristics of the X-ray sources. With nearly 930 000 entries detected in the most sensitive 0.2–2.3 keV energyrange, the eRASS1 main catalogue presented here increases the number of known X-ray sources in the published literature by morethan 60%, and provides a comprehensive inventory of all classes of X-ray celestial objects, covering a wide range of physical processes.A smaller catalogue of 5466 sources detected in the less sensitive but harder 2.3–5 keV band is the result of the first true imaging surveyof the entire sky above 2 keV. We present methods to identify and flag potential spurious sources in the catalogues, which we appliedfor this work, and we tested and validated the astrometric accuracy via cross-comparison with other X-ray and multi-wavelengthcatalogues. We show that the number counts of X-ray sources in eRASS1 are consistent with those derived over narrower fields bypast X-ray surveys of a similar depth, and we explore the number counts variation as a function of the location in the sky. Adopting auniform all-sky flux limit (at 50% completeness) of F$_{0.5−2 keV}$ > 5 × 10$^{−14}$ erg s$^{−1}$cm$^{−2}$, we estimate that the eROSITA all-sky surveyresolves into individual sources about 20% of the cosmic X-ray background in the 1–2 keV range. The catalogues presented here formpart of the first data release (DR1) of the SRG/eROSITA all-sky survey. Beyond the X-ray catalogues, DR1 contains all detected andcalibrated event files, source products (light curves and spectra), and all-sky maps. Illustrative examples of these are provided.

Note: A&A, vol. 682, A34 (2024). 39 pages, 23 figures. Accepted for publication in A&A. Accompanying eROSITA-DE Data Release 1

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Contributing Institute(s):

1. Deutsches Zentrum für Astrophysik (Z_DZA)

Research Program(s):

1. 613 - Matter and Radiation from the Universe (POF4-613) (POF4-613)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2024

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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