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MASTER OT J005051.63+521106.6 discovery - possible CV

ATel #7002; P. Balanutsa, V. Lipunov, E. Gorbovskoy, V. Kornilov, N. Tiurina, A. Kuznetsov, V. Vladimirov, D. Denisenko (Lomonosov Moscow State University, SAI), K. Ivanov, O. Gres, S. Yazev, N. Budnev, V. Poleshchuk, E. Konstantinov (Irkutsk State University), A. Tlatov, D. Dormidontov, V. Senik, A. Parkhomenko (Kislovodsk solar station of the Pulkovo observatory RAS) V. Yurkov, Y. Sergienko, A. Gabovich (Blagoveshchensk Educational University), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University), D. Buckley, S. Potter, A. Kniazev, M. Kotze (SAAO), V. Shumkov, S. Shurpakov (MASTER team members)
on 27 Jan 2015; 22:08 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Cataclysmic Variable, Transient, Variables

MASTER OT J005051.63+521106.6 - possible new CV candidate

MASTER-Tunka auto-detection system (Lipunov et al., 2010, Advances in Astronomy, article id. 349171, pp. 1-7) discovered OT source at (RA, Dec) = 00h 50m 51.63s +52d 11m 06.6s on 2015-01-25.600 UT. The OT unfiltered magnitude is 16.2m (limit is 18.7m). There are 3 images with OT during MASTER survey. There is no minor planet at this place. We have reference image without OT at 2011-12-17.556 UT with 20.7m unfiltered magnitude limit.

The object has a possible UV counterpart GALEX J005051.4+521106 (NUV=19.69+/-0.13). Nothing is present within 5" radius of the OT in any other catalog and AAVSO VSX. There is faint blue star (~21m), that is visible at this position at the digitized Palomar plates. Color-combined DSS finder chart is uploaded to http://master.sai.msu.ru/static/OT/J005051+521106-BRIR5x5.jpg (2x zoom).

Based on the outburst amplitude (~5m), MASTER OT J005051.63+521106.6 can be new cataclysmic variable (dwarf nova). Follow up observations are required.

MASTER-Tunka discovery and reference images are available at: http://master.sai.msu.ru/static/OT/005051.63521106.6.png

List of Optical Transients discovered by MASTER

MASTER