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New Cataclysmic Variable and Flare Star discovered by MASTER

ATel #6556; P. Balanutsa, D. Denisenko, V. Lipunov, E. Gorbovskoy, N. Tiurina, V. Kornilov, N. Shatskiy, V. Chazov, A. Kuznetsov, V. Vladimirov (Lomonosov Moscow State University, SAI), V. Yurkov, A. Gabovich, Y. Sergienko, E. Sinyakov (Blagoveshchensk Educational University), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University), A. Tlatov, D. Dormidontov, V. Senik, A. Parkhomenko (Kislovodsk Solar Station of Pulkovo Observatory), K. Ivanov, S. Yazev, N. Budnev, E. Konstantinov, O. Chuvalaev, V. Poleshchuk, O. Gress (Irkutsk State University), V. Shumkov, S. Shurpakov (MASTER team members)
on 8 Oct 2014; 19:19 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Cataclysmic Variable, Transient, Variables

MASTER OT J014825.10+430652.0 - new CV

MASTER-Amur auto-detection system discovered OT source at (RA, Dec) = 01h 48m 25.10s +43d 06m 52.0s on 2014-10-01.62759 UT. The OT unfiltered magnitude is 18.4m (limit 20.1m). The OT is seen in 5 images. There is no minor planet at this place. We have reference image without OT on 2011-09-02.71793 UT with magnitude limit in V filter 19.3m.

There is a faint blue star within 1" of the OT in GSC 2.3.2 with jmag=22.43. Color-combined DSS finder chart is uploaded to http://master.sai.msu.ru/static/OT/J014825+430652-BRIR5x5.jpg (2x zoom). Nothing is present at this position in 1RXS, 2MASS, GCVS and AAVSO VSX. This area of sky in Andromeda is not covered by SDSS. Catalina Sky Survey has a possible detection of another outburst to 18.8m in orphan catalog with 4 images on MJD=55840.3 (2011-10-06).

Based on the amplitude of variability (about 4m), MASTER OT J014825.10+430652.0 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/014825.10430652.0.png

MASTER OT J000606.97+422331.9 - flaring red dwarf

MASTER-Amur auto-detection system discovered OT source at (RA, Dec) = 00h 06m 06.97s +42d 23m 31.9s on 2014-10-03.58700 UT. The OT unfiltered magnitude is 17.3m (limit 18.7m). The OT is seen in 3 images. There is no minor planet at this place. We have reference image without OT on 2012-09-24.59795 UT with unfiltered magnitude limit 18.9m. The object has faded on the first triplet of images (60-sec exposures): 14:03:47 UT, 17.20m; 14:05:17 UT, 17.25m; 14:06:47 UT, 17.53m. It was not detected to the limiting magnitude 18.9m on the second triplet of images obtained 52 minutes later, at 14:55-14:58 UT.

The OT at quiescence is identical to the red star USNO-B1.0 1323-0002993 (R2=20.22 I=17.83) = 2MASS J00060703+4223320 (J=15.34 H=14.66 K=14.47). The object is not present in GCVS and AAVSO VSX. This area of sky in Andromeda is not covered by SDSS.

Based on the red color and short flare duration, MASTER OT J000606.97+422331.9 is a new variable of UV Ceti type (flaring red dwarf). Follow up observations are encouraged. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/000606.97422331.9.png

List of Optical Transients discovered by MASTER

Global MASTER Robotic Net