Large-Amplitude Flaring Star discovered by MASTER

ATel #6519; N. Tiurina, V. Lipunov, D. Denisenko, E. Gorbovskoy, P. Balanutsa, V. Kornilov, N. Shatskiy, V. Chazov, A. Kuznetsov, V. Vladimirov, V. Yecheistov (Lomonosov Moscow State University, SAI), A. Parkhomenko, A. Tlatov, D. Dormidontov, V. Senik (Kislovodsk Solar Station of Pulkovo Observatory), K. Ivanov, S. Yazev, N. Budnev, E. Konstantinov, O. Chuvalaev, V. Poleshchuk, O. Gress (Irkutsk State University), V. Yurkov, Y. Sergienko, D. Varda, E. Sinyakov, A. Gabovich (Blagoveshchensk Educational University), 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 1 Oct 2014; 09:21 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J012916.47+321859.0 - flaring red dwarf

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 01h 29m 16.47s +32d 18m 59.0s on 2014-09-29.93253 UT. The OT unfiltered magnitude is 16.6m (limit 19.3m). The OT is seen in 3 images. There is no minor planet at this place. We have reference image without OT on 2011-12-22.72035 UT with unfiltered magnitude limit 20.3m. The object has shown a quick fading on the first triplet of images (180-sec exposures): 22:19:15 UT, 15.96m; 22:22:51 UT, 16.62m; 22:26:26 UT, 17.23m. It has faded below 19.3m on the second triplet of images obtained 1.25 hr later, at 23:34:17-23:41:20 UT.

The OT at quiescence is identical to the red star SDSS J012916.48+321858.8 (g=22.59 r=21.26 i=19.54 z=18.47) = WISE J012916.48+321858.8. The object is not present in 2MASS, GCVS and AAVSO VSX.

Based on the red color and short flare duration, MASTER OT J012916.47+321859.0 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/012916.47321859.0.png

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