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No bright optical counterpart to the X-ray transient SRGA J204318.2+443815

ATel #14209; Kirill Sokolovsky (MSU/SAI MSU), Stanislav Korotkiy (Ka-Dar Obs./Astrovert), Olga Smolyankina (Observatory of Omsk CPCT), Aleksandr Beloushkin (Voronezh)
on 24 Nov 2020; 09:15 UT
Credential Certification: Kirill Sokolovsky (kirx@scan.sai.msu.ru)

Subjects: Optical, X-ray, Transient

The X-ray transient SRGA J204318.2+443815 = SRGE J204319.0+443820 (ATel #14206) was discovered on 2020-11-20 by SRG/ART-XC telescope operating in the 4-12 keV energy band. We obtained wide-field optical images of the field containing SRGA J204318.2+443815 with the NMW survey camera ( http://scan.sai.msu.ru/nmw/ ) on 2020-11-19.9259 UTC and 2020-11-21.7248 - a day before and after the X-ray detection. We found no optical counterpart brighter than magnitude 14.3 (unfiltered with V zero-point) at the X-ray transient position.

WCS-calibrated FITS images of the field containing SRGA J204318.2+443815