The Discovery of Strong Optical Correlation between PMN J1336-1529 and New Gamma-Ray Fermi-LAT Source

ATel #14477; K. Zhirkov, N. Tiurina, V. Lipunov, V. Kornilov, E. Gorbovskoy, O. Gress (Lomonosov MSU), R. Podesta, F. Podesta, C. Francile (OAFA), D. Buckley (SAAO), P. Balanutsa, F. Balakin, V. Vladimirov, A. Kuznetsov, D. Vlasenko, I. Gorbunov, D. Zimnukhov, V. Senik, A. Chasovnikov, A. Pozdnyakov, V. Topolev, D. Cheryasov, V. Shumkov, T. Pogrosheva (Lomonosov Moscow State University, SAI, Physics Department), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), N. M. Budnev (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V. Yurkov (Blagoveshchensk State Pedagogical University)
on 20 Mar 2021; 07:55 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER-Net reports on an enhanced optical activity of the flat-spectrum radio source PMN J1336-1529(ATel #14474).

MASTER-OAFA robotic telescope located at Argentina has coincidentally observed the object on the 14th of March 2021 from 05:59 to 07:14 UTC and made three frames with no filter. The source is clearly visible on all frames.

Our closest observation before the gamma-ray detection was on the 17th of January 2021. We do not detect the source which limits its magnitude at 19.

Considering the sudden brightening we conclude that PMN J1336-1529 most likely is the gamma-ray source.

We encourage further multi-wavelength observations of this source.