MASTER-OAFA: new OT, ampl>6.5m
ATel #12090; V. Shumkov, V. Lipunov (Lomonosov MSU), R. Podesta (OAFA), H. Levato (ICATE), D. Buckley (SAAO), C. Lopez, F. Podesta, C. Francile (OAFA, SanJuan National University), E. Gorbovskoy, N. Tiurina, P. Balanutsa, A. Kuznetsov, V. Kornilov, V. Chazov, D. Vlasenko, V. Vladimirov, O. Gress, A. Krylov (Lomonosov Moscow State University, SAI), R. Rebolo Lopez, M. Serra-Ricart ((IAC), T. Pogrosheva, V. Senik, A. Gabovich
on 9 Oct 2018; 08:41 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Ultra-Violet, Request for Observations, Cataclysmic Variable, Transient, Variables
MASTER OT J055548.92-303053.3 discovery - ampl>6.5mag, no known optical source in VIZIER
MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 05h 55m 48.92s -30d 30m 53.3s on 2018-10-09.22942 UT.
The OT unfiltered magnitude is 15.5m (mlim=18.6m).
The OT is seen in 3 images (2018-10-09 05:25:11,05:30:22,08:24:20.10). There is no minor planet at this place.
We have reference image without OT on 2017-11-23.29399 UT with 19.2m unfiltered magnitude limit (MASTER-OAFA), the nearest in time is reference image on 2018-09-21 00:49:34 with 2018-09-21 00:46:22
(MASTER-SAAO) with unfiltered mlim=20.0
There is no known optical sources in VIZIER database (22m POSS limit in history and more then 6.5m of current outburst amplitude, so as MASTER_W=0.2B+0.8R calibrated by USNO-B1 thousands field stars), but there is GALEX source
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/055548.92-303053.3.png
List of Optical Transients discovered by MASTER
MASTER Global Robotic Net
