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Two OT's detected by MASTER

ATel #4530; P. Balanutsa, D. Denisenko, E. Gorbovskoy, V. Lipunov, N. Tiurina, V. Kornilov, A. Belinski, N. Shatskiy, V. Chazov, A. Kuznetsov, D. Zimnukhov, V. Echeistov, (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, P. Podvorotny (MASTER team members), H. Levato, C. Saffe (ICATE), C. Mallamaci, C. Lopez and F. Podest (Observatorio Astronomico Felix Aguilar; OAFA)
on 30 Oct 2012; 19:07 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

Subjects: Optical, Cataclysmic Variable

MASTER OT J072959.96+110205.4 - new CV?

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 07h 29m 59.96s +11d 02m 05.4s on 2012-10-21.04249 UT. The OT unfiltered magnitude is 18.0m (limit 19.7m). The OT is seen in 3 images. There is no minor planet at this place. We have reference image without OT on 2012-02-22.75453 UT with unfiltered magnitude limit 19.8m.

The galactic latitude is +13.5 deg. There is nothing at this position in USNO-B1.0, 2MASS, 1RXS, GCVS and AAVSO VSX. This area is not covered by SDSS and CRTS. However, there is a faint blue star within 1" of the OT at the limit of digitized Palomar plates and UV object GALEX J073000.1+110203 (NUV=21.65+/-0.53). We suggest that MASTER OT J072959.96+110205.4 is a cataclysmic variable.

Spectral observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/072959.96110205.4_1.png

MASTER OT J205355.86+341410.0 - new CV?

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 20h 53m 55.86s +34d 14m 10.0s on 2012-10-28.75475 UT. The OT unfiltered magnitude is 17.1m (limit 18.2m). The OT is seen in 2 images. There is no minor planet at this place. We have reference image without OT on 2010-09-15.81128 UT with unfiltered magnitude limit 21.1m.

The galactic latitude is -7 deg. This area is not covered by SDSS and CRTS. There is nothing at this position in USNO-B1.0, 2MASS, 1RXS, GALEX, GCVS and AAVSO VSX. However, there is a faint star on Palomar plates which is present in GSC 2.3.2 with coordinates R.A. = 20 53 55.788, Dec. = +34 14 11.46 and Fmag=20.05, jmag=21.03. We suggest that MASTER OT J205355.86+341410.0 is a new cataclysmic variable.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/205355.86341410.0_1.png Spectral observations are required.

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