We present the X-ray source number counts in two energy bands (0.5–2 and 2–10 keV) from
a very large source sample: we combine data of six different surveys, both shallow wide-field …

The eROSITA telescope array aboard the Spektrum Roentgen Gamma (SRG) satellite
began surveying the sky in December 2019, with the aim of producing all-sky X-ray source …

We present a catalog of galaxy clusters selected via their Sunyaev–Zel'dovich (SZ) effect
signature from 2500 deg 2 of South Pole Telescope (SPT) data. This work represents the …

Cyclotron lines, also called cyclotron resonant scattering features are spectral features,
generally appearing in absorption, in the X-ray spectra of objects containing highly …

We present new measurements of the evolution of the X-ray luminosity functions (XLFs) of
unabsorbed and absorbed active galactic nuclei (AGNs) out to z∼ 5. We construct samples …

We present two large catalogs of active galactic nucleus (AGN) candidates identified across
30,093 deg 2 of extragalactic sky from the Wide-field Infrared Survey Explorer's AllWISE …

Aims. We present the second ROSAT all-sky survey source catalogue, hereafter referred to
as the 2RXS catalogue. This is the second publicly released ROSAT catalogue of point-like …

As matter accretes onto the central supermassive black holes in active galactic nuclei
(AGNs), X-rays are emitted. We present a population synthesis model that accounts for the …

We release the AllWISE counterparts and Gaia matches to 106 573 and 17 665 X-ray
sources detected in the ROSAT 2RXS and XMMSL2 surveys with| b|> 15°. These are the …

Aims. Pointed observations with XMM-Newton provide the basis for creating catalogues of X-
ray sources detected serendipitously in each field. This paper describes the creation and …