MASTER OT J115510.13-442218.6: new OT with ampl>6.2m
ATel #14584; P. Balanutsa, V. Lipunov, V. Kornilov (Lomonosov MSU), R. Podesta, F. Podesta (OAFA), O. Gress(ISU), I. Gorbunov, E. Gorbovskoy, N. Tyurina, T. Pogrosheva, K. Zhirkov, A. Kuznetsov, V. Vladimirov, D. Vlasenko, D. Zimnukhov, V. Senik, V. Shumkov, A. Chasovnikov, E. Minkina, V. Topolev, D. Kuvshinov, F. Balakin(Lomonosov Moscow State University), C. Lopez, C. Francile (Observatorio Astronomico Felix Aguilar OAFA), D. A.H. Buckley (SAAO), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), N. Budnev, O. Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory) A. Gabovich, V. Yurkov (Blagoveschensk Educational State University)
on 29 Apr 2021; 18:10 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, Cataclysmic Variable, Transient, Variables
MASTER OT J115510.13-442218.6 discovery - no known sources in VIZIER database, ampl>6.2
MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 11h 55m 10.13s -44d 22m 18.6s on 2021-04-29.25038 UT.
The OT unfiltered m=15.8m (mlim=18.0).
The OT is seen in 2 images. There is no minor planet at this place.
We have reference image on 2018-03-24.24529 UT with unfiltered mlim= 19.8m.
There is no any sources in VIZIER, it means 22m POSS limit (MASTER unfiltered is calibrated by USNO-B1 as 0.2B+0.8R) and current amplitude more then 6.2m
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/115510.13-442218.6.png
MASTER Global Robotic Net
