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Two New Cataclysmic Variables by MASTER

ATel #6027; P. Balanutsa, V. Lipunov, D. Denisenko, E. Gorbovskoy, N. Tiurina, V. Kornilov, N. Shatskiy, V. Chazov, A. Kuznetsov, V. Vladimirov, V. Yecheistov (Moscow State University, SAI), V. Yurkov, Y. Sergienko, D. Varda, E. Sinyakov, A. Gabovich (Blagoveshchensk Educational 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 Pulkovo Observatory), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University), P. Podvorotny, V. Shumkov, S. Shurpakov (MASTER team members), H. Levato, C. Saffe (ICATE), C. Mallamaci, C. Lopez, F. Podest (OAFA)
on 30 Mar 2014; 20:17 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Cataclysmic Variable, Transient

MASTER OT J062954.27+253911.7 - new CV

MASTER-Amur auto-detection system discovered OT source at (RA, Dec) = 06h 29m 54.27s +25d 39m 11.7s on 2014-03-29.51516 UT. The OT unfiltered magnitude is 16.3m (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 2012-10-20.80266 UT with unfiltered magnitude limit 18.9m.

The OT at quiescence is identical to the blue star USNO-A2.0 1125-04059907 (06 29 54.20 +25 39 12.9 B=19.0 R=19.1) = USNO-B1.0 1156-0115860 (06 29 54.198 +25 39 12.64 B1=19.70 R1=18.90 B2=20.05 R2=19.01 I=N/A) = SDSS J062954.21+253912.0 (u=19.78 g=20.15 r=19.92 i=19.97 z=20.15). There is nothing at this position in 1RXS, 2MASS, GCVS and AAVSO VSX. This area of sky in Gemini is not covered by Catalina Sky Survey and GALEX.

Based on the blue color and amplitude of variability (~4m), MASTER OT J062954.27+253911.7 is a new cataclysmic variable (dwarf nova in outburst). SDSS colors suggest a small contribution from the secondary companion and short orbital period. Follow up observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/062954.27253911.7.png

MASTER OT J052622.61+734629.7 - new CV

MASTER-Amur auto-detection system discovered OT source at (RA, Dec) = 05h 26m 22.61s +73d 46m 29.7s on 2014-03-30.50661 UT. The OT unfiltered magnitude is 15.8m (limit 18.4m). The OT is seen in 6 images. There is no minor planet at this place. We have reference image without OT on 2012-11-16.49994 UT with unfiltered magnitude limit 18.5m.

The OT is identical to the blue star USNO-A2.0 1575-02327030 (05 26 22.68 +73 46 29.1 R=17.3 B=16.9) = USNO-B1.0 1637-0051431 (05 26 22.564 +73 46 29.56 pmRA=-10 pmDE=4 B1=17.79 R1=17.12 B2=21.55 R2=N/A I=N/A). It was in outburst on 1953-10-14 blue and red POSS-I plates and at quiescence on other plates. Color-combined DSS finder chart is uploaded to http://master.sai.msu.ru/static/OT/J052622+734629-BRIR.jpg (10'x10' FOV) and comparison of 1953 Oct. 14 and 1996 Nov. 13 DSS blue plates - to http://master.sai.msu.ru/static/OT/J052622+734629-POSS-B.jpg (5'x5' FOV).

There is nothing at this position in 1RXS, 2MASS, GCVS and AAVSO VSX. This area of sky in Camelopardalis is not covered by CSS, SDSS and GALEX. Based on the blue color, amplitude of variability (~4m) and previous detection, MASTER OT J052622.61+734629.7 is a new cataclysmic variable (dwarf nova in outburst). Follow up observations are encouraged. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/052622.61734629.7.png

List of Optical Transients discovered by MASTER

Global MASTER Robotic Net