MASTER: OT with ampl>6.5m

ATel #13491; T. Pogrosheva, V. Lipunov, E. Gorbovskoy, V. Kornilov, P. Balanutsa, N. Tyurina, A. Kuznetsov, F. Balakin, K. Zhirkov, V. Vladimirov, D. Vlasenko, I. Gorbunov, V. Shumkov, D. Zimnukhov, V. Senik, A. Chasovnikov, D. Kuvshinov (Lomonosov Moscow State University, SAI, Physics Department), O. A. Gres, N. M. Budnev, O. Ershova (Irkutsk State University, API), R. Podesta, C. Lopez, F. Podesta, C. Francile(Observatorio Astronomico Felix Aguilar OAFA), H. Levato(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE), R. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias), D. Buckley(South African Astronomical Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko(Blagoveschensk Educational State University) A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory)
on 17 Feb 2020; 12:05 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Tweet

MASTER OT J181025.50-611746.0 discovery - outburst with ampl>6.5m

AT2020cts
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 18h 10m 25.50s -61d 17m 46.0s on 2020-02-17.04291 UT.
The OT unfiltered magnitude is 15.6m (mlim=19.3).
The OT is seen in 4 images. There is no minor planet at this place.
We have reference image on 2018-09-03.87370 UT with unfiltered mlim= 19.9m.
There is only GSC2.3.2 source in VIZIER database, it means 22m POSS limit in history and more then 6.5m of current outburst amplitude
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/181025.50-611746.0.png

MASTER Global Robotic Net