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Two OTs detected by MASTER

ATel #4756; S. Shurpakov, V. Shumkov, D. Denisenko, P. Balanutsa, V. Lipunov, E. Gorbovskoy, 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, A. Frolova, (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. Yecheistov, P. Podvorotny (MASTER team members), H. Levato, C. Saffe (ICATE), C. Mallamaci, C. Lopez and F. Podest (Observatorio Astronomico Felix Aguilar; OAFA)
on 23 Jan 2013; 14:02 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

Subjects: Optical, Cataclysmic Variable, Supernovae, Transient

MASTER OT J062019.25+362511.7 - new bright CV

MASTER-Amur auto-detection system discovered OT source at (RA, Dec) = 06h 20m 19.25s +36d 25m 11.7s on 2013-01-21.63046 UT. The OT unfiltered magnitude is 16.4m (limit 17.7m). The OT is seen in 3 images. There is no minor planet at this place. We have reference image without OT on 2012-12-16.72213 UT with unfiltered magnitude limit 18.8m.

There is nothing at this position in any catalogs. No objects are visible on 6 DSS plates and on color-combined SDSS image to ~23.5m. No previous outbursts were detected by Palomar/NEAT and CRTS.

Based on the amplitude of variability (about 7m) we suggest that MASTER OT J062019.25+362511.7 is likely a dwarf nova of WZ Sge type in superoutburst. Follow up observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/062019.25362511.7.png

MASTER OT J165418.97+515236.9 - PSN

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 16h 54m 18.97s +51d 52m 36.9s on 2013-01-22.04169 UT. The OT unfiltered magnitude is 17.5m (limit 19.0m). The OT is seen in 2 images. There is no minor planet at this place. We have reference image without OT on 2010-06-09.89581 UT with magnitude limit in 'R' filter 19.7m.

There are 3 galaxies around. The brightest one is PGC 59221 (B=15.4) with a long distorted spiral arm. The OT offset is 78.3" E and 28.5" N. Two other galaxies are closer to the OT.

Spectral observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/165418.97515237.0.png

List of optical transients discovered by MASTER

Global MASTER Robotic Net