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MASTER: CVs

ATel #10781; P. Balanutsa, V. Shumkov, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), R. Podesta, F. Podesta (OAFA), H. Levato, C. Saffe (ICATE), E. Gorbovskoy, N. Tiurina, A. Kuznetsov, V. Kornilov, O. Gress, I. Gorbunov, T. Pogrosheva, V. Vladimirov, V. Chazov, D. Kuvshinov (Lomonosov Moscow State University, SAI)
on 26 Sep 2017; 01:16 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Request for Observations, Cataclysmic Variable, Transient, Variables

MASTER OT J065445.14-330507.0 detection during Fermi trigger inspection

During Fermi trigger 527826305 inspection (Ttrig=2017-09-23_02:25:07UT)
MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 06h 54m 45.14s -33d 05m 07.0s on 2017-09-23.35593 UT.
The OT unfiltered magnitude is 17.1m (mlim=19.0m).
The OT is seen in 2 images (standart MASTER inspection mode). There is no minor planet at this place.
We have reference image without OT on 2016-08-07.41416 UT with unfiltered magnitude limit 19.1m (ampl>2mag).
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/065445.14-330507.0.png

MASTER OT J214744.93-521842.8 detection - CV outburst, ampl>2.6m

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 21h 47m 44.93s -52d 18m 42.8s on 2017-09-20.93270 UT.
The OT unfiltered magnitude is 18.0m (mlim=20.1).
The OT is seen in 3 images. There is no minor planet at this place.There is GSC2.3.2 star in 1.7" with known Fmag=20.02,Rmag=20.70
We have reference image on 2016-07-31.91310 UT with unfiltered mlim= 20.6m, so the amplitude of current outburst is more then 2.6mag .
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/214744.93-521842.8.png

MASTER OT J202950.87-521346.1 detection- CV

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 20h 29m 50.87s -52d 13m 46.1s on 2017-09-19.79681 UT.
The OT unfiltered magnitude is 19.6m (mlim=20.6). The OT is seen in 4 images. There is no minor planet at this place.
We have reference image on 2015-08-07.93691 UT with unfiltered mlim= 20.7m.
There is GALEX source (accretion process) and SNO-B1 star.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/202950.87-521346.1.png

MASTER Global Robotic Net