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.

The eROSITA extragalactic CalPV serendipitous catalog / Liu, T; Merloni, A; Wolf, J; Salvato, M; Reiprich, TH; Comparat, J; Arcodia, R; Lamer, G; Georgakakis, A; Dwelly, T; Sanders, J; Buchner, J; Haberl, F; Ramos-Ceja, ME; Wilms, J; Nandra, K; Brunner, H; Brusa, M; Schwope, A; Robrade, J; Freyberg, M; Boller, T; Maitra, C; Veronica, A; Malyali, A. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - STAMPA. - 664:(2022), pp. A126.1-A126.22. [10.1051/0004-6361/202243362]

The eROSITA extragalactic CalPV serendipitous catalog

Brusa, M
Membro del Collaboration Group
;
2022

Abstract

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.
2022
The eROSITA extragalactic CalPV serendipitous catalog / Liu, T; Merloni, A; Wolf, J; Salvato, M; Reiprich, TH; Comparat, J; Arcodia, R; Lamer, G; Georgakakis, A; Dwelly, T; Sanders, J; Buchner, J; Haberl, F; Ramos-Ceja, ME; Wilms, J; Nandra, K; Brunner, H; Brusa, M; Schwope, A; Robrade, J; Freyberg, M; Boller, T; Maitra, C; Veronica, A; Malyali, A. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - STAMPA. - 664:(2022), pp. A126.1-A126.22. [10.1051/0004-6361/202243362]
Liu, T; Merloni, A; Wolf, J; Salvato, M; Reiprich, TH; Comparat, J; Arcodia, R; Lamer, G; Georgakakis, A; Dwelly, T; Sanders, J; Buchner, J; Haberl, F; Ramos-Ceja, ME; Wilms, J; Nandra, K; Brunner, H; Brusa, M; Schwope, A; Robrade, J; Freyberg, M; Boller, T; Maitra, C; Veronica, A; Malyali, A
File in questo prodotto:
File Dimensione Formato  
aa43362-22.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Creative commons
Dimensione 2.62 MB
Formato Adobe PDF
2.62 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/903455
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact