SRG/ART-XC Galactic Plane Survey near Galactic Longitude L 20◦ : Catalog of Sources

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Abstract

We present a catalog of sources detected by theMikhail Pavlinsky ART-XC telescope onboard
the SRG space observatory during the observations of the Galactic plane region near a longitude l   20◦
(L20 field) in October 2019. The L20 field was observed four times in the scanning mode, which provided
a uniform coverage of the sky region with a total area of   24 sq. deg with a median sensitivity of 8 ×
10−13 erg s−1 cm−2 (at 50% detection completeness) in the 4–12 keV energy band. As a result, we have
detected 29 X-ray sources at a statistically significant level, 11 of which have not been detected previously
by other X-ray observatories. Preliminary estimates show that four of themcan presumably be extragalactic
in nature. We also show that the source SRGA J183220.1−103508 (CXOGSG J183220.8−103510) is
most likely a galaxy cluster containing a bright radio galaxy at redshift z   0.121.

About the authors

M. N. Pavlinsky

Space Research Institute, Russian Academy of Sciences

Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

A. Yu. Tkachenko

Space Research Institute, Russian Academy of Sciences

Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

A. E. Shtykovsky

Space Research Institute, Russian Academy of Sciences

Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

D. I. Karasev

Space Research Institute, Russian Academy of Sciences

Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

A. N. Semena

Space Research Institute, Russian Academy of Sciences

Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

I. A. Mereminskiy

Space Research Institute, Russian Academy of Sciences

Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

A. А. Lutovinov

Space Research Institute, Russian Academy of Sciences

Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

R. A. Burenin

Space Research Institute, Russian Academy of Sciences

Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

R. A. Krivonos

Space Research Institute, Russian Academy of Sciences

Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

S. Yu. Sazonov

Space Research Institute, Russian Academy of Sciences

Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

V. A. Arefiev

Space Research Institute, Russian Academy of Sciences

Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

M. V. Buntov

Space Research Institute, Russian Academy of Sciences

Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

I. Yu. Lapshov

Space Research Institute, Russian Academy of Sciences

Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

V. V. Левин

Space Research Institute, Russian Academy of Sciences

Author for correspondence.
Email: dkarasev@cosmos.ru
Moscow, 117997 Russia

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