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MASTER: PSN in PGC071745 and dwarf nova outburst

ATel #8123; P. Balanutsa, V. Lipunov, E. Gorbovskoy (Lomonosov MSU), R. Rebolo, M. Serra-Ricart, N. Lodieu, G. Israelian (The Instituto de Astrofisica de Canarias), V. Kornilov, N. Tiurina, A. Kuznetsov, I. Gorbunov, D. Vlasenko, V. Chazov, E. Popova, V. Shumkov (M. V. Lomonosov MSU, SAI), D. Buckley, S. Potter, M. Kotze (South African Astronomical Observatory),O. Gress, N. Budnev, K. Ivanov (Irkutsk State University, Applied Physics Institute), A. Tlatov, V. Senik, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Krushinskiy (Ural Federal University), Yu. Sergienko, A. Gabovich, V. Yurkov (Blagoveschensk Educational State University)
on 5 Oct 2015; 15:28 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

MASTER OT J233328.09-015847.0 discovery - possible supernova in PGC071745

MASTER-IAC auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 23h 33m 28.09s -01d 58m 47.0s on 2015-10-05.06922 UT.
The OT unfiltered magnitude is 16.9m (the limit is 18.5m). This PSN is in 29"E and 45.8"S from the center of PGC071745 galaxy.
There are 3 images with PSN in MASTER-IAC database, and 6 images in MASTER-Amur database (2015-10-05 14:36:17-14:53:25). There is no minor planet at this place. We have reference 200 images without OT, for ex., on 2015-09-11.93303 UT with unfiltered magnitude limit 19.5m.
Spectral observations are required.
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/233328.09-015847.0.png

MASTER OT J023714.71-464802.3 discovery - possible dwarf nova outburst, Ampl>2.8m

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 02h 37m 14.71s -46d 48m 02.3s on 2015-10-05.06280 UT.
The OT unfiltered magnitude is 18.8m (the limit is 20.5m).
This OT is seen in 3 image. There is no minor planet at this place. We have reference image without OT on 2015-01-12.84694 UT with unfiltered magnitude limit 20.2m. there is a USNO-B1 star with B2=21.13, R2=21.76.
Spectral observations are required.
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/MASTEROTJ023714.71-464802.3.png

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net