SRG/ART-XC detection of new outburst from BeXRB IGR J21347+4737
ATel #14247; A. Semena(1), A. Lutovinov(1), I. Mereminskiy(1), S. Molkov(1), I. Lapshov(1), A. Tkachenko(1) (1: IKI RAS)
on 6 Dec 2020; 19:51 UT
Credential Certification: Ilya Mereminskiy (i.a.mereminskiy@gmail.com)
Subjects: X-ray, Binary, Neutron Star, Transient
Referred to by ATel #: 14291
During the ongoing second sky survey the Mikhail Pavlinsky ART-XC
telescope on board the SRG observatory detected a possible beginning of a
new outburst from IGR J21347+4737 - the known BeXRB (Bikmaev+2008,
Reig and Zezas 2014).
The source was detected on Dec 6, 2020 with approx. 5 mCrab
(or 7x10^-11 erg/cm2/s) flux in the 4-12 keV energy band. In the first
sky survey on Jun 2, 2020 the source flux was measured at
the level of 1.3x10^-11 erg/cm2/s in the same energy band, consistent with
the 2013 XMM-Newton observation, when the source was inactive.
Given the assumed distance of 8.5 kpc (Reig and Zezas, 2014) the source luminosity
in the 4-12 keV band is about 6x10^35 erg/s. The increased flux could indicate the onset of a new outburst.
Coherent pulsations with ~320s period were detected in the low state in 2013.
We encourage X-ray observations to measure
the period change and to search for cyclotron lines in the energy spectrum
of this poorly studied source.
ART-XC is the X-ray telescope on board the SRG observatory which was
launched from the Baikonur cosmodrome on 13 July 2019 by a Proton rocket.
ART-XC has been renamed 'The Mikhail Pavlinsky ART-XC telescope', after the
tragic loss of its former PI, Dr. Mikhail Pavlinsky, who passed away in July 2020.f
