New Dwarf Nova discovered by MASTER

ATel #4367; P. Balanutsa, D. Denisenko, E. Gorbovskoy, V. Lipunov, N. Tiurina, V. Kornilov, A. Belinski, N. Shatskiy, V. Chazov, A. Kuznetsov, D. Zimnukhov (Moscow State University, SAI), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov, A. Punanova (Ural Federal University), K. Ivanov, S. Yazev, N. Budnev, E. Konstantinov, O. Chuvalaev, V. Poleshchuk, O. Gress (Irkutsk State University), A. Parkhomenko, A. Tlatov, D. Dormidontov, V. Senik (Kislovodsk solar station of the Pulkovo observatory RAS), V. Yurkov, Y. Sergienko, D. Varda, E. Sinyakov (Blagoveshchensk Educational University), V. Shumkov, S. Shurpakov (MASTER team members), H. Levato, C. Saffe (ICATE), C. Mallamaci, C. Lopez and F. Podest (Observatorio Astronomico Felix Aguilar; OAFA)
on 10 Sep 2012; 16:26 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

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MASTER J173000.60-035658.4 discovery

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 17h 30m 00.60s -03d 56m 58.4s on 2012-09-06.72760 UT. The OT unfiltered magnitude is 16.7m (limit 17.6m).

The OT is seen in 2 images. There is no minor planet at this place.

We have reference image without OT on 2012-04-24.99468 UT with unfiltered magnitude limit 19.6m.

Nothing is visible at the position of the OT on the sum of eight Digitized Sky Survey plates (limiting magnitude ~21.5). Comparison of MASTER-Kislovodsk discovery and reference images with the color-combined (JRIR) DSS image is posted at: http://master.sai.msu.ru/static/OT/17300060-0356584.jpg

There is nothing at this position in 2MASS, USNO-B1.0, GALEX and 1RXS catalogs, as well as in GCVS and AAVSO VSX. This area is not covered by SDSS.

This area was observed by the NEAT project on 18 nights from 1996 July 20 to 2004 Apr. 08. In total 47 images were taken. The object was in outburst on 2002 July 01, but at quiescence on all other images, including those of 2002 June 22 (nine days before the outburst).

Based on the amplitude of variability and presence of the previous outburst we conclude that MASTER J173000.60-035658.4 is a new cataclysmic variable (dwarf nova). Follow up observations are encouraged.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/173000.60-035658.4.png

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