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@ARTICLE{Merloni:619436,
      author       = {Merloni, A. and Lamer, G. and Liu, T. and Ramos-Ceja, M. E.
                      and Brunner, H. and Bulbul, E. and Dennerl, K. and
                      Doroshenko, V. and Freyberg, M. J. and Friedrich, S. and
                      Gatuzz, E. and Georgakakis, A. and Haberl, F. and Igo, Z.
                      and Kreykenbohm, I. and Liu, A. and Maitra, C. and Malyali,
                      A. and Mayer, M. G. F. and Nandra, K. and Predehl, P. and
                      Robrade, J. and Salvato, M. and Sanders, J. S. and Stewart,
                      I. and Tubín-Arenas, D. and Weber, P. and Wilms, J. and
                      Arcodia, R. and Artis, E. and Aschersleben, J. and Avakyan,
                      A. and Aydar, C. and Bahar, Y. E. and Balzer, F. and Becker,
                      W. and Berger, K. and Boller, T. and Bornemann, W. and
                      Brüggen, M. and Brusa, M. and Buchner, J. and Burwitz, V.
                      and Camilloni, F. and Clerc, N. and Comparat, J. and
                      Coutinho, D. and Czesla, S. and Dannhauer, S. M. and Dauner,
                      L. and Dauser, T. and Dietl, J. and Dolag, K. and Dwelly, T.
                      and Egg, K. and Ehl, E. and Freund, S. and Friedrich, P. and
                      Gaida, R. and Garrel, C. and Ghirardini, V. and Gokus, A.
                      and Grünwald, G. and Grandis, S. and Grotova, I. and Gruen,
                      D. and Gueguen, A. and Hämmerich, S. and Hamaus, N. and
                      Hasinger, Günther Gustav and Haubner, K. and Homan, D. and
                      Chitham, J. Ider and Joseph, W. M. and Joyce, A. and König,
                      O. and Kaltenbrunner, D. M. and Khokhriakova, A. and Kink,
                      W. and Kirsch, C. and Kluge, M. and Knies, J. and
                      Krippendorf, S. and Krumpe, M. and Kurpas, J. and Li, P. and
                      Liu, Z. and Locatelli, N. and Lorenz, M. and Müller, S. and
                      Magaudda, E. and Mannes, C. and McCall, H. and Meidinger, N.
                      and Michailidis, M. and Migkas, K. and Muñoz-Giraldo, D.
                      and Musiimenta, B. and Nguyen-Dang, N. T. and Ni, Q. and
                      Olechowska, A. and Ota, N. and Pacaud, F. and Pasini, T. and
                      Perinati, E. and Pires, A. M. and Pommranz, C. and Ponti, G.
                      and Poppenhaeger, K. and Pühlhofer, G. and Rau, A. and Reh,
                      M. and Reiprich, T. H. and Roster, W. and Saeedi, S. and
                      Santangelo, A. and Sasaki, M. and Schmitt, J. and Schneider,
                      P. C. and Schrabback, T. and Schuster, N. and Schwope, A.
                      and Seppi, R. and Serim, M. M. and Shreeram, S. and
                      Sokolova-Lapa, E. and Starck, H. and Stelzer, B. and
                      Stierhof, J. and Suleimanov, V. and Tenzer, C. and Traulsen,
                      I. and Trümper, J. and Tsuge, K. and Urrutia, T. and
                      Veronica, A. and Waddell, S. G. H. and Willer, R. and Wolf,
                      J. and Yeung, M. C. H. and Zainab, A. and Zangrandi, F. and
                      Zhang, X. and Zhang, Y. and Zheng, X.},
      title        = {{T}he {SRG}/e{ROSITA} all-sky survey - {F}irst {X}-ray
                      catalogues and data release of the western {G}alactic
                      hemisphere},
      journal      = {Astronomy and astrophysics},
      volume       = {682},
      issn         = {0004-6361},
      address      = {Les Ulis},
      publisher    = {EDP Sciences},
      reportid     = {PUBDB-2024-07629, arXiv:2401.17274},
      pages        = {A34},
      year         = {2024},
      note         = {$A\&A,$ vol. 682, A34 (2024). 39 pages, 23 figures.
                      Accepted for publication in $A\&A.$ Accompanying eROSITA-DE
                      Data Release 1},
      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.},
      cin          = {$Z_DZA$},
      ddc          = {520},
      cid          = {$I:(DE-H253)Z_DZA-20230622$},
      pnm          = {613 - Matter and Radiation from the Universe (POF4-613)},
      pid          = {G:(DE-HGF)POF4-613},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2401.17274},
      howpublished = {arXiv:2401.17274},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2401.17274;\%\%$},
      UT           = {WOS:001187947500001},
      doi          = {10.1051/0004-6361/202347165},
      url          = {https://bib-pubdb1.desy.de/record/619436},
}