MASTER-IAC: new optical source with ampl>4.4m
ATel #13319; E. Gorbovskoy, V. Lipunov (Lomonosov MSU), R. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias), V. Kornilov, N. Tiurina, P. Balanutsa, I. Gorbunov, E. Minkina, A. Kuznetsov, V. Vladimirov, T. Pogrosheva, D. Vlasenko, D. Zimnukhov, D. Cheryasov, V. Senik, V. Shumkov(Lomonosov MSU), R. Podesta, C. Lopez, F. Podesta, C. Francile (OAFA), H. Levato(ICATE), D. Buckley(SAAO), O. A. Gres, N. M. Budnev, O. Ershova(ISU, API), A. Tlatov, D. Dormidontov(Kislovodsk Solar Station of the Pulkovo Observatory),V. Yurkov, A. Gabovich, Yu. Sergienko(Blagoveschensk ESU)
on 29 Nov 2019; 11:24 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, Cataclysmic Variable, Transient, Variables
MASTER OT J072211.73+184253.7 discovery - preliminary dwarf nova outburst with ampl>4.4m
MASTER-IAC auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 07h 22m 11.73s +18d 42m 53.7s on 2019-11-29 04:23:59 UT.
The OT unfiltered magnitude is 17.6m (limit 19.7m).
The OT is seen in 3 images (2019-11-29 02:43:18-05:50:24UT). There is no minor planet at this place.
We have reference images without OT on 2018-12-03 03:06:30UT with unfiltered (0.2B+0.8R by USNO-B1 R2,B2) mlim=20.2, 2016-11-09 02:02:54 UT with unfiltered magnitude limit 20.6m.
There is previous outburst at MASTER-Kislovodsk reference image at 2009-12-25 21:20:42UT with automatic Vmag=18.6+-0.2.
There is only GALEX source (accretion process) in 1.6", it means USNO, Gaia 22m limit in history and more then 4.4m of current outburst amplitude. There is faint blue source (not catalogued) at PanSTARRs images
Spectral observations are required.
The discovery and reference images http://master.sai.msu.ru/static/OT/072211.73184253.7.png
List of Optical Transients discovered by MASTER
MASTER Global Robotic Net
