MASTER-OAGH detection of an optical flare from TXS 1520+344

ATel #15369; K. Zhirkov, V. Lipunov (Lomonosov MSU), L. Carrasco, J. R. Valdes, V. Chavushyan, V. M. Patino Alvarez, J. Martinez, A. R. Corella, L. H. Rodriguez (INAOE, OAGH), V. Kornilov, E. Gorbovskoy, N. Tyurina, P. Balanutsa, A. Kuznetsov, D. Vlasenko, G. Antipov, D. Zimnukhov, V. Senik, E. Minkina, A. Chasovnikov, V. Topolev, D. Kuvshinov, D. Cheryasov (Lomonosov MSU), R. Rebolo, M. Serra (IAC), D. Buckley (SAAO), C. Francile, F. Podesta, R. Podesta (OAFA), O. Gress, N. Budnev, Ya. Kechin, Yu. Tselik (ISU, API), A. Tlatov, D. Dormidontov (KSS, Pulkovo), A. Gabovich, V. Yurkov (BSPU), V. Shumkov, T. Pogrosheva
on 7 May 2022; 18:45 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

Tweet

MASTER-OAGH (located at The Guillermo Haro Astrophysics Observatory, Mexico http://oagh.master.sai.msu.ru :3422 )
reports on the detection of an optical flare from the FSRQ TXS 1520+344.

Fermi-LAT collaboration reported that the FSRQ TXS 1520+344 (R. A., Decl. = 230.72866 deg, +34.23586 deg, Petrov & Taylor 2011, AJ, 142, 89) was experiencing a gamma-ray flare on May 5, 2022 (ATel #15367).

To investigate the possibility of a multiwavelength flare, the newest installation of MASTER telescopes, MASTER-OAGH, observed the blazar on May 7 2022, from 04:41 UT to 05:45 UT and made 8 images of this object.

We detect it at W=17.99 +/- 0.08 (unfiltered) and do not register any significant variability on such a period.
On April 25, 2019 at 20:33 UT, MASTER-Kislovodsk imaged this blazar. It was detected at W=19.20 +/- 0.27.
If this is considered as a quiescence state then the amplitude of the flare is 1.2 mag at the level of 5.6 sigma.

From this we can say that TXS 1520+344 currently undergoes a multiwavelength flare.
We encourage further multiwavelength observations of the object.

MASTER Global Robotic Net