MASTER: high amplitude CV
ATel #12232; P. Balanutsa, V. Lipunov (Lomonosov MSU), A. Gabovich, V. Yurkov (BSPU), E. Gorbovskoy, N. Tiurina, A. Kuznetsov, V. Vladimirov, V. Kornilov, D. Zimnukhov, D. Vlasenko (Lomonosov Moscow State University, SAI), R. Rebolo, M. Serra-Ricart (IAC), D. Buckley (SAAO), R. Podesta, C. Lopez, F. Podesta, C. Francile (OAFA), H. Levato (ICATE, SJNU), O. Gress, N. Budnev (API ISU), A. Tlatov, V. Senik (KSS), V. Shumkov, T. Pogrosheva
on 20 Nov 2018; 19:46 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, Cataclysmic Variable, Transient, Variables
MASTER OT J030504.43+433641.2 detection - ampl >5mag
MASTER-Amur auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 03h 05m 04.43s +43d 36m 41.2s on 2018-11-20.54828 UT during routine MASTER automatic Fermi trigger 564334514 inspection (but OT is not connected with this GRB).
The OT unfiltered magnitude is 15.9m (mlim=17.9m) at 2 inspect images. There is m_OT=15.8 on 2018-11-19 15:54:32.201 at MASTER-Kislovodsk 1 inspect image.
We have reference images without OT on 2014-10-01.54326 UT with unfiltered magnitude limit 19.0m (MASTER-Amur), on 2018-10-18 23:13:57 with marginally seen OT << mlim=19.8 (MASTER-Kislovodsk), on without OT on 2018-09-22 17:48:45UT with mlim=18.7 (MASTER-Tunka).
There is SDSS star ( and other) with rmag=21.3 in history.
MASTER unfiltered W=0.2B+0.8R, calibrated by USNO-B1 R2,B2/R1,B1.
It means more then 5mag of current outburst amplitude.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/030504.43433641.2.png
List of Optical Transients discovered by MASTER
MASTER Global Robotic Net
