MASTER: OT early outburst with ampl >5.3mag
ATel #12607; O. Gress, V. Lipunov (Lomonosov MSU), A. Tlatov (KSS Pulkovo observatory), N. Tiurina, E. Gorbovskoy, P. Balanutsa, V. Kornilov, A. Kuznetsov, D. Vlasenko, D. Zimnukhov, V. Vladimirov, V. Senik, A. Chasovnikov, V. Topolev (Moscow State University, SAI), N. Budnev, Yu. Ishmuhametova, O. Ershova, S. Yazev (API, Irkutsk State University), V. Yurkov, Y. Sergienko, A. Gabovich (Blagoveshchensk Educational University), R. Rebolo, M. Serra-Ricart (IAC), R. Podesta, C. Lopez, F. Podesta, C. Francile (OAFA SJNU), H. Levato (ICATE SJNU), D. Buckley (SAAO), T. Pogrosheva, V. Shumkov, S. Shurpakov
on 23 Mar 2019; 14:42 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, Cataclysmic Variable, Transient
MASTER OT J195416.74+494421.1 detection - ampl>5.3m, possibl. dwarf nova
MASTER-Kislovodsk auto-detection system ( Lipunov et al., "MASTER Global Robotic Net",
Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 19h 54m 16.74s +49d 44m 21.1s on 2019-03-22.98483 UT.
The OT unfiltered magnitude is 16.7m (limit 18.4m).
The OT is seen in 2 images. There is no minor planet at this place.
We have reference image without OT on 2019-02-14 01:55:56 UT with unfiltered magnitude limit 19.3m, on
2019-03-21 01:31:59UT (MASTER-Tavrida) with mlim=18.3
There is only PanSTARRS source in VIZIER database with rmag=21.6, it means 22m POSS limit in history and more then 5.3m of current outburst amplitude.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/195416.74494421.1.png
MASTER Global Robotic Net
