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MASTER-Kislovodsk: new OT

ATel #10724; P. Balanutsa, V. Lipunov (Lomonosov MSU), R. Rebolo, M. Serra-Ricart (IAC), V. Kornilov, E. Gorbovskoy, N. Tiurina, O. Gress, A. Kuznetsov, I. Gorbunov, V. Chazov, D. Vlasenko, V. Shumkov, T. Pogrosheva (Moscow State University, SAI), A. Tlatov, V. Senik, D. Dormidontov (Kislovodsk solar station of the Pulkovo observatory RAS), A. Gabovich (BSPU)
on 9 Sep 2017; 09:51 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

MASTER OT J071204.39+275514.0 discovery - new OT, ampl>4.6m

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 07h 12m 04.39s +27d 55m 14.0s on 2017-09-06.04009 UT.
The OT unfiltered magnitude is 17.4m (limit 17.7m).
The OT is seen in 2 images. There is no minor planet at this place.
We reobserved it in MASTER-IAC, unfiltered m_OT=17.5 on 6 images 2017-09-07 04:41:37-05:49:18UT.
We have reference image without OT on 2010-12-06.96181 UT with unfiltered magnitude limit 21.6m (MASTEr-Kislovodsk).
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/071204.39275514.0.png

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