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MASTER: possible SN in Sloan galaxy and dwarf novae outbursts

ATel #8786; V. Vladimirov, P. Balanutsa, V. Lipunov, E. Gorbovskoy, N. Tiurina, V. Kornilov, A. Kuznetsov, D. Vlasenko, I. Gorbunov, D. Kuvshinov, V. Vladimirov, V. Shumkov (Lomonosov Moscow State University, SAI), O. Gress, N. Budnev, K. Ivanov, V. Poleschuk (Applied Physics Institute, Irkutsk State University), A. Tlatov, V. Senik, D. Dormidontov (Kislovodsk Solar Station, Pulkovo Observatory)
on 7 Mar 2016; 21:05 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

Referred to by ATel #: 8805

MASTER OT J075258.03+043936.6 discovery - high amplitude dwarf nova outburst, Ampl>5.6

MASTER-Tunka auto-detection system( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 349171 ) discovered OT source at (RA, Dec) = 07h 52m 58.03s +04d 39m 36.6s on 2016-03-01.59067 UT.
The OT unfiltered magnitude is 16.4m (limit 18.3m).
The OT is seen in 3 images. There is no minor planet at this place.There is no known optical source only GALEX UV source, so the amplitude of outburst is more then 5.6m. We have reference image without OT on 2015-01-14.73535 UT with 19.1 unfiltered magnitude limit , on 2015-02-15 20:21:49 UT with m_lim=20.0.
Spectral observations are required.

MASTER OT J075402.95-011355.8 discovery - PSN(superluminous?) in Sloan galaxy(red=21.8)

MASTER-Tunka auto-detection system discovered OT source at (RA, Dec) = 07h 54m 02.95s -01d 13m 55.8s on 2016-03-01.58275 UT.
The OT unfiltered magnitude is 17.4m (limit 18.3m).
The OT is seen in 6 images. There is no minor planet at this place.
We have reference image without OT on 2015-01-19.75292 UT with 18.0 unfiltered magnitude limit , on 2012-01-26 20:47:06UT with m_lim=19.8(MASTER-Kislovodsk).
There is Sloan galaxy with red mag=21.8. Possible superluminous?
Spectral observations are required.
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/075402.95-011355.8.png

MASTER OT J230551.43+794223.1 discovery - dwarf nova outburst, Ampl>4.8mag

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 23h 05m 51.43s +79d 42m 23.1s on 2016-02-26.99969 UT.
The OT unfiltered magnitude is 17.2m (limit 18.3m). The OT is seen in 6 images. There is no minor planet at this place.
We have reference image without OT on 2013-03-18.72539 UT with unfiltered magnitude limit 18.5m.
There is USNO-B1 star with known only blue B2=22m, so we suggest the dwarf nova outburst with ampl>4.8m Spectral observations are required.

MASTER Global Robotic Net