MASTER: optical transients with ampl>4.2m and 3.6m
ATel #13746; O. Gress, P. Balanutsa, V. Lipunov (Lomonosov MSU), R. Podesta, F. Podesta, C. Francile (OAFA), H. Levato (SJNU), D. A. H. Buckley (SAAO), K. Zhirkov, V. Kornilov, E. Gorbovskoy, A. Chasovnikov, N. Tiurina, P. Balanutsa, I. Gorbunov, A. Kuznetsov, V. Vladimirov, D. Vlasenko, F. Balakin, D. Zimnukhov, D. Cheryasov, V. Senik, E. Minkina, V. Grinshpun, V. Shumkov, T. Pogrosheva, V. Topolev, A. Pozdnyakov (Lomonosov MSU), N. M. Budnev(ISU, API), A. Gabovich, Yu. Sergienko(BSPU), R. Rebolo, M. Serra-Riscart, (IAC), A. Tlatov, D. Dormidontov(Kislovodsk Solar Station of the Pulkovo Observatory)
on 20 May 2020; 20:59 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, Cataclysmic Variable, Transient, Variables
MASTER OT J194230.94+072537.1 detection - outburst with ampl>4.2m
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 19h 42m 30.94s +07d 25m 37.1s on 2020-05-20.02309 UT.
The OT unfiltered magnitude is 17.8m(mlim=18.7).
The OT is seen in 4 images. There is no minor planet at this place.
We have reference image on 2018-08-15.85451 UT with unfiltered mlim= 18.8m.
There is only PanSTARRS source in history , that gives 22m POSS limit and more then 4.2 of current outburst amplitude.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/194230.94072537.1.png
MASTER OT J182929.96+064348.3 detection - outburst with ampl>3.6m
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 18h 29m 29.96s +06d 43m 48.3s on 2020-05-19.96133 UT.
The OT unfiltered magnitude is 18.4m (mlim=18.9).
The OT is seen in 4 images. There is no minor planet at this place.
We have reference image on 2017-05-11.09586 UT with unfiltered mlim= 19.0m.
There is PanSTARRS source at this place, and Palomar 22m llimit in history, and there was previous outburst detected by ZTF at 2018-09-12 (AT 2018gfz). So current amplitude is more then 3.6m
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/182929.96064348.3.png
MASTER Global Robotic Net
