New Bright CV discovered by MASTER

ATel #4143; P. Balanutsa, D. Denisenko, V. Lipunov, E. Gorbovskoy, N. Tiurina, V. Kornilov, A. Belinski, N. Shatskiy, V. Chazov, A. Kuznetsov, D. Zimnukhov, D. Gareeva (Moscow State University, SAI) V. Krushinsky, I. Zalozhnih, A. Popov (Ural State 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) P. Podvorotniy, 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 1 Jun 2012; 17:20 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

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MASTER OT J143857.37+703523.1 - new CV

MASTER-Amur auto-detection system discovered OT source at (RA, Dec) = 14h 38m 57.37s +70d 35m 23.1s on 2012-05-30.71734 UT. The OT unfiltered magnitude is 13.0m (limit 18.5m).

The OT is seen in 2 images. We have MASTER-Tunka reference image without OT on 2012-01-02 19:44:40 UT with unfiltered magnitude limit 19.6m. The object has faded to 14.4m by 2012-06-01.64 UT.

The discovery and reference images are available at: http://observ.pereplet.ru/images/MASTER143857.37+703523.jpg

The object is present in USNO-B catalog as USNO-B1.0 1605-0102553 (RA = 14 38 57.462, Dec = +70 35 22.97, pmRA=-32, DE=12, B1=19.92 R1=19.27 B2=18.46 R2=18.70 I=19.17) and in GALEX UV catalog as GALEX J143857.4+703523 (NUV=20.64+/-0.17). It is not present in GCVS or AAVSO VSX.

10'x10' color-combined (BRIR) DSS finder chart is uploaded to http://master.sai.msu.ru/static/OT/J143857+703523-comps.jpg

Based on the blue USNO-B color and outburst amplitude we conclude that MASTER OT J143857.37+703523.1 is a dwarf nova of UGSU or UGWZ subtype. Follow up observations are required.

Global MASTER Robotic Net