Possible Nova and Flaring Quasar discovered by MASTER
O. Gress (Irkutsk State University), D. Denisenko, V. Lipunov, E. Gorbovskoy, N. Tiurina, P. Balanutsa, V. Kornilov, N. Shatskiy, V. Chazov, A. Kuznetsov, V. Vladimirov, V. Yecheistov (Moscow State University, SAI), K. Ivanov, S. Yazev, N. Budnev, E. Konstantinov, O. Chuvalaev, V. Poleshchuk (Irkutsk State University), V. Yurkov, Y. Sergienko, D. Varda, E. Sinyakov, A. Gabovich (Blagoveshchensk Educational 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)
MASTER OT J192809.82+551616.5 - possible Nova

Following the discovery of large amplitude optical transient MASTER OT J192809.82+551616.5 (Balanutsa et al., ATel #5994) we have checked the archival data of MASTER network and obtained the additional observations. Selected unfiltered magnitudes (including an upper limit 26 hours before the first positive detection) are listed in the table below.

Spectral classification is required. BVRI photometry is also encouraged, as well as checking the data from other surveys.

MASTER OT J124851.01+483953.5 - flaring quasar

MASTER-Tunka auto-detection system discovered OT source at (RA, Dec) = 12h 48m 51.01s +48d 39m 53.5s on 2014-03-23.66150 UT. The OT unfiltered magnitude is 18.0m (limit 19.7m). The OT is seen in 3 images. There is no minor planet at this place. We have reference image without OT on 2011-04-26.70269 UT with unfiltered magnitude limit 20.1m.

The OT at quiescence is identical to quasar B1246+4856 = NVSS J124850+483953 = SDSS J124850.94+483953.1 (u=21.44 g=21.09 r=20.54 i=20.13 z=19.79) at z=1.856. No previous outbursts were detected by CRTS.

Multi-wavelength observations are strongly encouraged. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/124851.01483953.5.png
optical,cataclysmic variable,nova,planet,quasar,transient,variables,request for observations