| Issue |
A&A
Volume 664, August 2022
|
|
|---|---|---|
| Article Number | A126 | |
| Number of page(s) | 22 | |
| Section | Catalogs and data | |
| DOI | https://doi.org/10.1051/0004-6361/202243362 | |
| Published online | 18 August 2022 | |
The eROSITA extragalactic CalPV serendipitous catalog★
1
Max-Planck-Institut für extraterrestrische Physik,
Giessenbachstraβe 1,
85748
Garching bei München, Germany
e-mail: liu@mpe.mpg.de
2
Argelander-Institut für Astronomie, Rheinische Friedrich-Wilhelms-Universität Bonn,
Auf dem Hugel 71,
53121
Bonn, Germany
3
Leibniz-Institut für Astrophysik Potsdam,
An der Sternwarte 16,
14482
Potsdam, Germany
4
Institute for Astronomy and Astrophysics, National Observatory of Athens, V. Paulou and I. Metaxa,
11532
Greece
5
Dr. Karl Remeis-Sternwarte & Erlangen Centre for Astroparticle Physics,
Sternwartstr. 7,
96049
Bamberg, Germany
6
Dipartimento di Fisica e Astronomia “Augusto Righi”, Università di Bologna,
via Gobetti 93/2,
40129
Bologna, Italy
7
INAF – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna,
via Gobetti 93/3,
40129
Bologna, Italy
8
Hamburger Sternwarte, University of Hamburg,
Gojenbergsweg 112,
21029
Hamburg, Germany
Received:
18
February
2022
Accepted:
8
April
2022
Context. The eROSITA X-ray telescope on board the Spectrum-Roentgen-Gamma (SRG) observatory performed calibration and performance verification (CalPV) observations between September 2019 and December 2019, ahead of the planned 4-yr all-sky surveys. Most of them were deep, pointing-mode observations.
Aims. We present here the X-ray catalog detected from the set of extra-galactic CalPV observations released to the public by the German eROSITA consortium, and the multiband counterparts of these X-ray sources.
Methods. We developed a source detection method optimized for point-like X-ray sources by including extended X-ray emission in the background measurement. The multiband counterparts were identified using a Bayesian method from the CatWISE catalog.
Results. Combining 11 CalPV fields, we present a catalog containing 9515 X-ray sources, whose X-ray fluxes were measured through spectral fitting. CatWISE counterparts are presented for 77% of the sources. Significant variabilities are found in 99 of the sources, which are also presented with this paper. Most of these fields show similar number counts of point sources as typical extragalactic fields, and a few harbor particular stellar populations.
Key words: surveys / catalogs / galaxies: active / X-rays: galaxies / X-rays: binaries / X-rays: stars
The catalog is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/664/A126
© T. Liu et al. 2022
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Open Access funding provided by Max Planck Society.
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