MASTER: 2 CV outbursts
ATel #12606; O. Ershova, T. Pogrosheva, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), R. Rebolo, M. Serra-Ricart (IAC), E. Gorbovskoy, N. Tiurina, P. Balanutsa, Yu. Ishmuhametova, A. Kuznetsov, V. Kornilov, D. Vlasenko, V. Vladimirov, O. Gress, V. A. Senik (Lomonosov Moscow State University, SAI), R. Podesta, F. Podesta, C. Francile (OAFA), H. Levato, C. Lopez (ICATE), V. Yurkov, A. Gabovich (BSPU), V. Shumkov, D. Savinov
on 22 Mar 2019; 15:14 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, Cataclysmic Variable, Transient, Variables
MASTER OT J085423.80-561053.2 discovery - prelim. dwarf nova outburst, ampl>5.5
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 08h 54m 23.80s -56d 10m 53.2s on 2019-03-21.75416 UT.
The OT unfiltered magnitude is 16.5m (mlim=18.5).
The OT is seen in 4 images. There is no minor planet at this place.
We have reference image on 2014-12-27.94707 UT with unfiltered mlim= 19.4m.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/085423.80-561053.2.png
MASTER OT J010655.69+493834.9 detection - CV outburst, ampl>5.8m
MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 01h 06m 55.69s +49d 38m 34.9s on 2019-03-14.76933 UT.
The OT unfiltered magnitude is 16.1m (mlimit=17.0m).
The OT is seen in 5 images. There is no minor planet at this place.
OT has the following automatic photometry (unfiltered W=0.2B+0.8R by USNO-B1) :
2019-03-16 14:53:30UT m_OT=16.9+-0.1 (MASTER-Tunka)
2019-03-17 19:06:44UT m_OT=17.7+-0.1 (MASTER-Tavrida)
We have reference images without OT on 2019-03-21 17:02:28UT with mlim=18.1, on 2018-10-07 16:20:25UT with mlim=20.8 (MASTER-Tunka), on 2012-09-19.80153 UT with unfiltered magnitude limit 20.3m (MASTER-Kislovodsk), on 2015-11-12 02:27:40UT with mlim=20.5(MASTER-IAC).
There is USNO-B1 source with blue B2=21.34, (22m POSS limit in R gives W=21.9 in history) it means ampl>5.8m
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/010655.69493834.9.png
MASTER Global Robotic Net
