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MASTER: PSNe and CV

ATel #9902; O. Gress, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), A. Tlatov (KSS, Pulkovo), E. Gorbovskoy, N. Tiurina, A. Kuznetsov, P. Balanutsa, V. Kornilov, V. Shumkov, N. Kuznetsov, D. Kuvshinov, D. Vlasenko, V. Chazov, K. Ivanov, E. Popova, T. Pogrosheva (Lomonosov MSU), S. Potter (SAAO), V. Senik, D. Dormidontov, A. Parkhomenko (Kislovodsk Solar Station of the Main Pulkovo Observatory)
on 27 Dec 2016; 11:50 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Cataclysmic Variable, Supernovae, Transient, Variables

MASTER OT J051721.71-513132.0 discovery - PSN in 0.5"E,16.4"N of PGC147304

MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 05h 17m 21.71s -51d 31m 32.0s on 2016-12-26.92440 UT.
The OT unfiltered magnitude is 18.2m (mlim=20.5).
The OT is seen in 3 images. There is no minor planet at this place.
We have reference image on 2016-04-30.76874 UT with unfiltered mlim= 20.5m.
This OT is in 0.5"E,16.4"N of PGC147304 with Btc=15.6
Spectral observations are required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/051721.71-513132.0.png

MASTER OT J074509.15-621438.0 discovery - dwarf nova outburst, Ampl>4m

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 07h 45m 09.15s -62d 14m 38.0s on 2016-12-22.97976 UT.
The OT unfiltered magnitude is 18.0m (mlim=19.5).
The OT is seen in 4 images. There is no minor planet at this place.
We have reference image on 2016-03-20.08044 UT with unfiltered mlim= 19.9m.
There is only GSC 2.3.2 known star with jmag=22.04(previous outburst), so the Ampl of current outburst is more then 4m
Spectral observations are required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/074509.15-621438.0.png

MASTER OT J094234.49+105935.7 discovery - superluminous PSN (also known as ATLAS16eay) or CV?

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 09h 42m 34.49s +10d 59m 35.7s on 2016-12-21.99084 UT.
The OT unfiltered magnitude is 17.2m (limit 18.9m).
The OT is seen in 2 images. There is no minor planet at this place.
We have reference image without OT on
2016-10-05 01:46:01UT with mlim=19.0 and on 2013-03-30.78402 UT with 19.2m unfiltered magnitude limit (MASTER-Kislovodsk),
2016-11-15 20:34:29 with mlim=17.7(MASTER-Tunka),
2015-10-17 19:35:22 with mlim=18.1 (MASTER-Amur).
In the PSN scenario this OT must be superluminous SN : SDSS galaxy in 4.6" and our limits are inside this posibility.

Spectral observations are required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/094234.49105935.7.png

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net