Three MASTER OT's discovery

ATel #3366; P. Balanutsa, E. Gorbovskoy, D. Gareeva, V. Lipunov, V. Kornilov, A. Belinski, N. Shatskiy, N. Tyurina, D. Kuvshinov, V. Chazov, A. Kuznetsov, D. Zimnukhov, M. Kornilov (SAI, Moscow), Nicolas Lodieu (Instituto de Astrofisica de Canarias), A. Tlatov, A. V. Parhomenko, D. Dormidontov (Kislovodsk solar station of the Pulkovo observatory RAS), V. Yurkov, I. Kudelina ,Yu. Sergienko, D. Varda (Blagoveshchensk Educational University), V. Krushinski, I. Zalozhnih, A. Popov (Ural State University), K. Ivanov, S. Yazev, N. Budnev, E. Konstantinov, O. Chuvalaev, V. Poleschuk, O. Gres,(Irkutsk State University) , V. Shumkov, S. Shurpakov (MASTER team member)
on 20 May 2011; 12:07 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

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The MASTER auto-detection system at Tunka (Baykal Lake) detected a new transient source at the position (R.A., Dec) = 17h 29m 00.07s , +75d 18m 42s.5, (J2000) with a typical uncertainty of 0.5" at 2011-05-12 18:24:47.725 (UT). The OT is seen at 2 images. There is no minor planet and any object brighter 21 mag in DSS at this place.

The unfiltered (0.2B+0.8R) magnitude is about 17.7+-0.1 ( exposition 180s, mag limit =20.0). There are 2MASS J17285995+7518436 and USNOB1 red star (R=19.4). Distance to the OT arcsec: 1.69. This is M8 star (http://cdsbib.u-strasbg.fr/cgi-bin/cdsbib?2008AJ....136.1290R).

The MASTER auto-detection system at Ural detected a new transient source at the position (R.A., Dec) = 13h 13m 20.36, +69d 26m 48s.3, (J2000) with a typical uncertainty of 0.5" at 2011-05-14 16:39:20.093(UT). The OT is seen at 4 images. There is no minor planet and any object brighter 21 mag in DSS at this place.

The MASTER auto-detection system at Tunka (Baykal Lake) detected a new transient source at the position (R.A., Dec) = 13h 13m 20.36, +69d 26m 48s.3, (J2000) with a typical uncertainty of 0.5" at 2011-05-14 16:39:20.093(UT). The OT is seen at 4 images. There is no minor planet and any object brighter 21 mag in DSS at this place.

The unfiltered magnitude is (0.2B+0.8R) , where B and R are USNOB magnitudes.

The spectral observations are needed.

OT	DATA (UT)	m	Discovery Image	Comment
MASTER172900.07+751842.5	2011-05-12 18:24:48	17.7+-0.1	Images	M8 star high Galactic Latitude Flare?
MASTER073721.02+854323.7	2011-05-14 20:41:17	19.5+-0.1	Images	?
MASTER131320.36+692648.3	2011-05-14 16:39:20	16.1+-0.1	Images	SNIIn?

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