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MASTER: QSO flare and PSN

ATel #7273; O. Gress, V. Lipunov, E. Gorbovskoy, S. Antipin, N. Tiurina, P. Balanutsa, V. Kornilov, A. Kuznetsov, V. Chazov, V. Vladimirov, E. Popova (Lomonosov Moscow State University, SAI), N. Budnev, K. Ivanov, S. Yazev, V. Poleshchuk, E. Konstantinov, O. Chuvalaev (Irkutsk State University), A. Tlatov, D. Dormidontov, V. Senik, A. Parkhomenko (Kislovodsk solar station of the Pulkovo observatory RAS), D. Buckley, S. Potter, A. Kniazev, M. Kotze (The South African Astronomical Observatory),V. Yurkov, Y. Sergienko, A. Gabovich (Blagoveshchensk Educational University), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University), V. Shumkov, S. Shurpakov (MASTER-Team)
on 23 Mar 2015; 01:11 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Request for Observations, Cataclysmic Variable, Quasar, Supernovae, Transient

MASTER OT J131840.22+675423.7 discovery - QSO flare

MASTER-Tunka auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 13h 18m 40.22s +67d 54m 23.7s on 2015-03-22.73999 UT.

The OT unfiltered magnitude is 18.1m (the limit is 20.2m). There are 4 images with OT. We have reference image without OT on 2012-02-27.86169 UT with 19.8 unfiltered magnitude limit in MASTER-Tunka database.

This MASTER OT is identical to 7625693 source from QSO candidates sel. (D'Abrusco+, 2009) with r_mag=20.832, g_mag=20.80, so this MASTER OT is a QSO flare (ampl ~ 2m).

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/MASTERJ131840.22+675423.7.jpg
Spectral observations are required.

MASTER OT J132723.53+674411.9 discovery - possible Superluminous SN or Dwarf Nova

MASTER-Tunka auto-detection system discovered OT source at (RA, Dec) = 13h 27m 23.53s +67d 44m 11.9s on 2015-03-22.74807 UT.

The OT unfiltered magnitude is 19.3m (the limit is 20.1m).

The OT is seen in 6 images. We have reference image without OT on 2012-02-27.862 UT with 19.8 unfiltered magnitude limit.

There is SDSS J132723.50+674414.5 galaxy (release 9) with g_mag=22.141, r_mag=22.353, so MASTER OT can be superluminous SN (ampl is about 3m). There is a star from SDSS 12 release, in this case MASTER OT can be Dwarf Nova (ampl~3m).

The discovery and reference images are available here :http://master.sai.msu.ru/static/OT/MASTERJ132723.53+674411.9.jpg

Spectral observations are required.

List of Optical Transients discovered by MASTER

Global MASTER Robotic Net