ART-XC detection of BeXRB IGR J06074+2205 in outburst

ATel #16267; A. N. Semena, I. A. Mereminskiy, A. A. Lutovinov, S. V. Molkov, V. A. Arefiev, A. E. Shtykovsky, A. Yu. Tkachenko, E. A. Kuznetsova (IKI RAS, Moscow)
on 4 Oct 2023; 12:32 UT
Credential Certification: Ilya Mereminskiy (i.a.mereminskiy@gmail.com)

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On Oct 03, 2023, during the ongoing Galactic plane survey the Mikhail Pavlinsky ART-XC telescope on board the SRG observatory detected the bright X-ray source coinciding with the position of the known Be X-ray binary IGR J06074+2205 (ATel #959, Reig and Zezas, 2018). Given the measured source flux of 2x10^-10 erg cm^-2 s^-1 (4-12 keV energy band) and the distance of 6 kpc (Gaia DR3) the source currently reached luminosity above 10³⁶ erg/s, suggesting an onset of a new outburst.

Previous outburst of the source was detected by MAXI (ATel #15294) in March, 2022. It should be noted that the long-term ZTF (Bellm et al, 2018) lightcurve shows a clear periodic modulation with a period of approximately 621 days, likely corresponding to the orbital period. Therefore, given the spacing between X-ray detections the source is now undergoing Type-I outburst. We encourage multiwavelength observations.

ART-XC is the X-ray telescope on board the SRG observatory which was launched from the Baikonur cosmodrome on 13 July 2019 by the Proton rocket. ART-XC has been renamed 'Mikhail Pavlinsky ART-XC telescope' in honor of its first PI, Dr. Mikhail Pavlinsky.