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Optical Flare from Pan-STARS PSN PS1-13eet detected by MASTER

ATel #6544; V. Shumkov, D. Denisenko, V. Lipunov, N. Tiurina, P. Balanutsa, E. Gorbovskoy, V. Kornilov, M. Pruzhinskaya, N. Shatskiy, V. Chazov, A. Kuznetsov, (Lomonosov Moscow State University, SAI) V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University) K. Ivanov, S. Yazev, N. Budnev, E. Konstantinov, O. Chuvalaev, V. Poleshchuk, O. Gress (Irkutsk State University) A. Tlatov, D. Dormidontov, V. Senik, A. Parkhomenko (Kislovodsk solar station of the Pulkovo observatory RAS) V. Yurkov, A. Gabovich, Y. Sergienko, E. Sinyakov (Blagoveshchensk Educational University), S. Shurpakov (MASTER team members)
on 6 Oct 2014; 09:52 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)

Subjects: Optical, Cataclysmic Variable, Supernovae, Transient

MASTER OT J031145.65+440919.6 = PS1-13eet - CV?

MASTER-Tunka auto-detection system discovered OT source at (RA, Dec) = 03h 11m 45.65s +44d 09m 19.6s on 2014-10-03.81796 UT (0.5 arcsec error). The OT unfiltered magnitude is 17.8m (the limit is 18.8m).

The OT is seen in 3 images: 03.815, 03.818, 03.839 UT . There is no minor planet at this place.

We have reference image without OT on 2011-12-25.58789 UT with unfiltered magnitude limit 19.4m.

We have 20 reference images up to unfiltered m_lim=19m in MASTER-Tunka observatory from 2010-08-28 17:03:34 to 2013-12-07 15:33:20, and 24 images with unfiltered m_lim from 18.7 up to 19.5 from 2010-10-18.968 UT to 2013-11-10.685 UT in MASTER-Kislovodsk observatory without OT at this coordinates.

There is a PS1-13eet , discovered at 2013/11/27.604 with 18.2 magnitude, but we have MASTER-Tunka image at 2013-12-07.627 UTwithout OT with unfiltered m_lim=19.1 .

There is SDSS star J031145.76+440919.8 at this place with Rmag = 23.1. Amplitude of this flare is more 5 mag. So it may be CV.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/MASTERJ031145.65+440919.6.jpg .

Spectral observations are required.

List of Optical Transients discovered by MASTER.

Global MASTER Net