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MASTER: bright PSN in PGC129355 and dwarf novae

ATel #8772; O. Gress, P. Balanutsa, V. Lipunov (Lomonosov MSU), D. Buckley(SAAO), E. Gorbovskoy, N. Tiurina, V. Kornilov, A. Kuznetsov, D. Vlasenko, I. Gorbunov, D. Kuvshinov, V. Vladimirov, V. Shumkov (Lomonosov Moscow State University, SAI), S. Potter, A. Kniazev (South African Astonomical Observatory)
on 4 Mar 2016; 14:33 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

MASTER OT J020137.57-520004.9 discovery - PSN(16.5m) in PGC129355(S0,15.2m,200Mpc)

MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 349171 ) discovered OT source at (RA, Dec) = 02h 01m 37.57s -52d 00m 04.9s on 2016-03-03.80209 UT.
The OT unfiltered magnitude is 16.5m (limit 19.3m).
The OT is seen in 4 images. There is no minor planet at this place. We have reference image without OT on 2015-02-17.79140 UT with unfiltered magnitude limit 20.6m.
This PSN is in 9.5"W,17.8"S of PGC129355
Spectral observations are required.
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/020137.57-520004.9.png

MASTER OT J050708.76-354808.5 discovery - dwarf nova outburt, Ampl>3.4m (no VIZIER data)

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 05h 07m 08.76s -35d 48m 08.5s on 2016-03-02.88549 UT.
The OT unfiltered magnitude is 18.6m (limit 20.9m).
The OT is seen in 4 images. There is no minor planet at this place. We have reference image without OT on 2015-10-08.11043 UT with unfiltered magnitude limit 20.8m.
There is no any known source inside 5" in VIZIER database, so the outburst amplitude is more then 3.4m (22m POSS limit)
Spectral observations are required.
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/050708.76-354808.5.png

MASTER OT J101424.62-111306.8 discovery - possible dwarf nova outburst, ampl>4.1

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 10h 14m 24.62s -11d 13m 06.8s on 2016-03-03.84332 UT.
The OT unfiltered magnitude is 17.9m (limit 20.1m).
The OT is seen in 8 images. There is no minor planet at this place.
We have reference image without OT on 2015-05-07.87182 UT with unfiltered magnitude limit 19.1m. There is no known sources in VIZIER database, so we suggest the dwarf nova outburst with amplitude more then 4.1m
Spectral observations are required.
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/101424.62-111306.8.png

MASTER OT J090915.35-101620.0 discovery - OT, ampl>1.1m

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 09h 09m 15.35s -10d 16m 20.0s on 2016-03-03.89579 UT.
The OT unfiltered magnitude is 18.8m (limit 20.1m).
The OT is seen in 2 images. There is no minor planet at this place.We have reference image without OT on 2015-06-08.78763 UT with unfiltered magnitude limit 19.9m. There is GSC2.3.2 star with red=19.57, blue=20.90 in 1.5" (MASTER unfiltered w=0.2B+0.8R, calibrated to USNO-B1)
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/090915.35-101620.0.png

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net