I. Lapshov
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View article: Discovery of a 0.8-mHz quasi-periodic oscillations in the transient X-ray pulsar SXP31.0 and associated timing transitions
Discovery of a 0.8-mHz quasi-periodic oscillations in the transient X-ray pulsar SXP31.0 and associated timing transitions Open
We present the first broad-band spectral and timing study of the Be/X-ray pulsar XTE J0111.2$-$7317 (SXP31.0) during its first major outburst since its discovery in 1998. This giant Type II outburst, observed in April-June 2025, marks the …
View article: SRGA J2306 + 1556: an extremely X-ray luminous, heavily obscured, radio-loud quasar at <i>z</i> = 0.44 discovered by <i>SRG</i>/ART-XC
SRGA J2306 + 1556: an extremely X-ray luminous, heavily obscured, radio-loud quasar at <i>z</i> = 0.44 discovered by <i>SRG</i>/ART-XC Open
We report on a detailed study of a luminous, heavily obscured ($N_{\rm H}\sim 2\times 10^{23}$ cm$^{-2}$), radio-loud quasar SRGA J230631.0 + 155633 discovered in the 4–12 keV energy band by the Mikhail Pavlinsky Astronomical Roentgen Tele…
View article: Inflight calibration of SRG/ART-XC point spread function at large off-axis angles
Inflight calibration of SRG/ART-XC point spread function at large off-axis angles Open
The knowledge of the point spread function (PSF) of the Mikhail Pavlinsky Astronomical Roentgen Telescope - X-ray Concentrator (ART-XC) telescope aboard the Spectrum-Roentgen-Gamma (SRG) observatory plays an especially crucial role in the …
View article: Traces of wobbling accretion disk in X-ray pulsar Her X-1 from observations of the ART-XC telescope of the SRG observatory
Traces of wobbling accretion disk in X-ray pulsar Her X-1 from observations of the ART-XC telescope of the SRG observatory Open
Long uninterrupted observations of the X-ray binary system Her X-1 were performed with the Mikhail Pavlinsky ART-XC telescope of the Spectrum-Röntgen-Gamma (SRG) X-ray Observatory in the 4–25 keV energy range with total exposure of about t…
View article: Traces of wobbling accretion disk in X-ray pulsar Her X-1 from observations of the ART-XC telescope of the SRG observatory
Traces of wobbling accretion disk in X-ray pulsar Her X-1 from observations of the ART-XC telescope of the SRG observatory Open
Long uninterrupted observations of the X-ray binary system Her X-1 were performed with the Mikhail Pavlinsky ART-XC telescope of the Spectrum-Röntgen-Gamma (SRG) X-ray Observatory in the 4--25 keV energy range with a total exposure of abou…
View article: Discovery of SRGA J144459.2−604207 with the SRG/ART-XC telescope: A well-tempered bursting accreting millisecond X-ray pulsar
Discovery of SRGA J144459.2−604207 with the SRG/ART-XC telescope: A well-tempered bursting accreting millisecond X-ray pulsar Open
We report the discovery of the new accreting millisecond X-ray pulsar SRGA J144459.2−604207 using data of the SRG/ART-XC. The source was observed twice in February 2024 during the declining phase of the outburst. The timing analysis reveal…
View article: <i>SRG</i>/ART-XC Galactic Bulge deep survey. I. Maximum likelihood source detection algorithm for X-ray surveys
<i>SRG</i>/ART-XC Galactic Bulge deep survey. I. Maximum likelihood source detection algorithm for X-ray surveys Open
We describe an X-ray source detection method entirely based on the maximum likelihood analysis, in application to observations with the ART-XC telescope onboard the Spectrum Roentgen Gamma observatory. The method optimally combines the dat…
View article: SRG/ART-XC all-sky X-ray survey: Catalog of sources detected during the first five surveys
SRG/ART-XC all-sky X-ray survey: Catalog of sources detected during the first five surveys Open
We present an updated catalog of sources detected by the Mikhail Pavlinsky ART-XC telescope aboard the Spektrum-Roentgen-Gamma (SRG) observatory during its all-sky survey. It is based on the data of the first four and the partially complet…
View article: SRG/ART-XC Galactic Bulge deep survey. I. Maximum likelihood source detection algorithm for X-ray surveys
SRG/ART-XC Galactic Bulge deep survey. I. Maximum likelihood source detection algorithm for X-ray surveys Open
We describe an X-ray source detection method entirely based on the maximum likelihood analysis, in application to observations with the ART-XC telescope onboard the Spectrum Roentgen Gamma observatory. The method optimally combines the dat…
View article: <i>SRG</i>/ART-XC Galactic Bulge deep survey. II. Catalogue of point sources
<i>SRG</i>/ART-XC Galactic Bulge deep survey. II. Catalogue of point sources Open
We present a catalogue of point sources detected with the Mikhail Pavlinsky ART-XC telescope onboard the SRG observatory during a wide-field survey of the Galactic Bulge that was conducted as part of the mission’s calibration and performan…
View article: X-ray Properties of the Luminous Quasar PG 1634+706 at $$z=1.337$$ from SRG and XMM-Newton Data
X-ray Properties of the Luminous Quasar PG 1634+706 at $$z=1.337$$ from SRG and XMM-Newton Data Open
In the fall of 2019, during the in-flight calibration phase of the SRG observatory, the onboard eROSITA and Mikhail Pavlinsky ART-XC telescopes carried out a series of observations of PG 1634+706 - one of the most luminous (an X-ray lumino…
View article: X-ray emission from Westerlund 2 detected by <i>SRG</i>/<i>ART-XC</i> and <i>Chandra</i>: search for radiation of TeV leptons
X-ray emission from Westerlund 2 detected by <i>SRG</i>/<i>ART-XC</i> and <i>Chandra</i>: search for radiation of TeV leptons Open
We present the results of current observations of the young compact cluster of massive stars Westerlund 2 (Wd2) with the Mikhail Pavlinsky ART-XC telescope aboard the Spectrum-Roentgen-Gamma (SRG) observatory which we analysed together wit…
View article: X-ray emission from Westerlund 2 detected by SRG/ART-XC and Chandra: search for radiation of TeV leptons
X-ray emission from Westerlund 2 detected by SRG/ART-XC and Chandra: search for radiation of TeV leptons Open
We present the results of current observations of the young compact cluster of massive stars Westerlund 2 with the Mikhail Pavlinsky ART-XC telescope aboard the Spectrum-Roentgen-Gamma (SRG) observatory which we analysed together with the …
View article: Wide-field X-ray observations of the supernova remnant Puppis A with the <i>SRG</i>/ART-XC telescope
Wide-field X-ray observations of the supernova remnant Puppis A with the <i>SRG</i>/ART-XC telescope Open
The Spectrum-Roentgen-Gamma (SRG) observatory is currently conducting its 4-yr all-sky X-ray survey, started on 2019 December 12. The survey is periodically interrupted for technological operations with the spacecraft. These time intervals…
View article: SRG/ART-XC discovery of SRGA J204318.2+443815: Towards the complete population of faint X-ray pulsars
SRG/ART-XC discovery of SRGA J204318.2+443815: Towards the complete population of faint X-ray pulsars Open
We report the discovery of the new long-period X-ray pulsar SRGA J204318.2+443815/SRGe J204319.0+443820 in a Be binary system. The source was found in the second all-sky survey by the Mikhail Pavlinsky ART-XC telescope on board the SRG mis…
View article: Peculiar X-ray transient SRGA J043520.9+552226/AT2019wey discovered with SRG/ART-XC
Peculiar X-ray transient SRGA J043520.9+552226/AT2019wey discovered with SRG/ART-XC Open
Context. During its ongoing all-sky survey, the Mikhail Pavlinsky ART-XC (Astronomical Roentgen Telescope - X-ray Concentrator) telescope on board the Spectrum-Roentgen-Gamma (SRG) observatory is set to discover new X-ray sources, many of …
View article: SRG/ART-XC all-sky X-ray survey: Catalog of sources detected during the first year
SRG/ART-XC all-sky X-ray survey: Catalog of sources detected during the first year Open
We present a first catalog of sources detected by the Mikhail Pavlinsky ART-XC telescope on board the SRG observatory in the 4–12 keV energy band during its ongoing all-sky survey. The catalog comprises 867 sources detected on the combined…
View article: SRG X-ray orbital observatory
SRG X-ray orbital observatory Open
The orbital observatory Spectrum-Roentgen-Gamma (SRG), equipped with the grazing-incidence X-ray telescopes Mikhail Pavlinsky ART-XC and eROSITA, was launched by Roscosmos to the Lagrange L2 point of the Sun–Earth system on July 13, 2019. …
View article: SRG/ART-XC all-sky X-ray survey: Catalog of sources detected during the first year
SRG/ART-XC all-sky X-ray survey: Catalog of sources detected during the first year Open
We present a first catalog of sources detected by the Mikhail Pavlinsky ART-XC telescope on board the SRG observatory in the 4-12 keV energy band during its ongoing all-sky survey. The catalog comprises 867 sources detected on the combined…
View article: Wide-field X-ray observations of the supernova remnant Puppis A with the SRG/ART-XC telescope
Wide-field X-ray observations of the supernova remnant Puppis A with the SRG/ART-XC telescope Open
The Spectrum-Roentgen-Gamma (SRG) observatory is currently conducting its 4-year all-sky X-ray survey, started on December 12, 2019. The survey is periodically interrupted for technological operations with the spacecraft. These time interv…
View article: Peculiar X-ray transient SRGA J043520.9+552226/AT2019wey discovered with\n SRG/ART-XC
Peculiar X-ray transient SRGA J043520.9+552226/AT2019wey discovered with\n SRG/ART-XC Open
Context: During the ongoing all-sky survey, the Mikhail Pavlinsky ART-XC\ntelescope on board the SRG observatory should discover new X-ray sources, many\nof which can be transient. Here we report on the discovery and multiwavelength\nfollo…
View article: The ART-XC telescope on board the SRG observatory
The ART-XC telescope on board the SRG observatory Open
Astronomical Roentgen Telescope – X-ray Concentrator (ART-XC) is the hard X-ray instrument with grazing incidence imaging optics on board the Spektr-Roentgen-Gamma (SRG) observatory. The SRG observatory is the flagship astrophysical missio…
View article: The SRG X-ray orbital observatory, its telescopes and first scientific results
The SRG X-ray orbital observatory, its telescopes and first scientific results Open
The orbital observatory Spectrum-Roentgen-Gamma (SRG), equipped with the grazing-incidence X-ray telescopes Mikhail Pavlinsky ART-XC and eROSITA, was launched by Roscosmos to the Lagrange L2 point of the Sun-Earth system on July 13, 2019. …
View article: The eROSITA X-ray telescope on SRG
The eROSITA X-ray telescope on SRG Open
eROSITA (extended ROentgen Survey with an Imaging Telescope Array) is the primary instrument on the Spectrum-Roentgen-Gamma (SRG) mission, which was successfully launched on July 13, 2019, from the Baikonour cosmodrome. After the commissio…