Discovery of the Optical Transient 15 50 11 +12 16 42

ATel #2756; E. Gorbovskoy, V. Lipunov, V. Kornilov, A. Belinski, N. Shatskiy, N. Tyurina, D. Kuvshinov, P. Balanutsa, V. V.Chazov, P. V.Kortunov, A. Kuznetsov, D. Zimnukhov, M. Kornilov, A. Sankovich ( all Sternberg Astronomical Institute, Moscow State University) A. Tlatov, A. V. Parhomenko, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory) V. Yurkov, Yu. Sergienko, D. Varda, I. Kudelina( Blagoveschensk Educational State University, Blagoveschensk) V. Krushinski, I. Zalozhnich, T. Kopytova, A. Popov (Ural State University, Kourovka) K. Ivanov, S. Yazev, N. M.Budnev, E. Konstantinov, V. Lenok, O. Gres, O. Chuvalaev( Irkutsk State University)
on 25 Jul 2010; 07:24 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

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At 2010-06-14 21:39:41.3 UT we find new OT in two band (R & V) about 18 mag in database of the MASTER II robotic telescope ( MASTER-Net) located at Kislovodsk (Lipunov et al.,2010, Advances in Astronomy, vol. 2010, pp. 1-7).

OT position:

r.a. = 15h 50m 11.27s , dec = +12d 16m 42s.2 error=+-0.3"

There are no any stars around 4 arcsec's. The most nearest star is the 22.6 mag stars (SDSS J155011.01+12164001 catalog) by 4.2".

The last image without OT was at 2010-02-26 01:59:15 >20 (Unfiltered).

The result of the photometry is:

  
   JD          R     V            Time  
  
2455362.3635 18.14 18.21 2010-Jun-14 20:43:26.04  
2455367.3594 17.92 19.11 2010-Jun-19 20:37:32.16  
2455379.3364 18.51 19.18 2010-Jul-01 20:04:24.96  
2455382.3119 19.03 18.76 2010-Jul-04 19:29:08.17  
2455389.3144 19.27 19.68 2010-Jul-11 19:32:44.17  
2455390.3117 19.37 18.91 2010-Jul-12 19:28:50.88  
2455397.3516 19.50 20.51 2010-Jul-19 20:26:18.25  

The light curves are available at http://observ.pereplet.ru/images/OT155011+121642/transients_lc.png

http://www.astronomerstelegram.org/?read=2578