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MASTER discoveries: bright PSN, new dwarf novae and QSO flare

ATel #9681; V. Shumkov, P. Balanutsa, O. Gress, E. Popova, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), R. Rebolo, M. Serra-Ricart (IAC), A. Tlatov (KSS), N. Budnev, K. Ivanov (API ISU), R. Podesta (OAFA), H. Levato (ICATE), E. Gorbovskoy, N. Tiurina, A. Kuznetsov, V. Vladimirov, V. Kornilov, V. Chazov, T. Pogrosheva (Lomonosov MSU), S. Potter (South African Astronomical Observatory), V. Senik, D. Dormidontov, A. Parkhomenko (Kislovodsk Solar Station of Main Pulkovo observatory), S. Shurpakov
on 27 Oct 2016; 18:54 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

MASTER OT J110533.80+194118.7 discovery - bright PSN in 24.1"W,11.2"S from PGC1602017
MASTER-Kislovodsk auto-detection system (Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L) discovered OT source at (RA, Dec) = 11h 05m 33.80s +19d 41m 18.7s on 2016-10-23.06338 UT.
The OT unfiltered magnitude is 16.7m (mlim=18.8m).
The OT is seen in 6 images. There is no minor planet at this place.
We have reference image without OT on 2013-04-01.82186 UT with unfiltered magnitude limit 19.7m.
This PSN is in 24.1"W,11.2"S from PGC1602017
Spectral observations are required.
The discovery and reference images are http://master.sai.msu.ru/static/OT/MASTEROTJ110533.80+194118.7.jpg

MASTER OT J174222.87-515806.4 discovery - new OT, pos. dwarf nova outburst with Ampl>4.8m, no known sources in VIZIER
MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 17h 42m 22.87s -51d 58m 06.4s on 2016-10-25.77892 UT.
The OT unfiltered magnitude is 17.2m (mlim=18.4). The OT is seen in 9 images. We have reference image on 2015-01-31.09847 UT with unfiltered mlim=18.7m.There is no any sources in VIZIER database inside 5", it means 22m POSS limit and more then 4.8mag of current outburst amplitude.
Spectral observations are required.
The discovery and reference images are http://master.sai.msu.ru/static/OT/MASTEROTJ174222.87-515806.4.jpg

MASTER OT J015252.11-102655.8 detection - QSO flare
MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 01h 52m 52.11s -10d 26m 55.8s on 2016-10-21.99448 UT.
The OT unfiltered magnitude is 17.3m (mlim=19.1m).
The OT is seen in 3 images. There is no minor planet at this place. We have reference image without OT on 2015-12-11.00932 UT with unfiltered mlim=20.5m.
This OT is a source from QSO candidates selection (D'Abrusco+, 2009) with low redshift Quasar classification (Abraham+, 2012)
Spectral observations are required.
The discovery and reference images are http://master.sai.msu.ru/static/OT/015252.11-102655.8.png

MASTER OT J200518.34+863434.7 detection - pos.dwarf nova outburst with ampl>2.5m
MASTER-Tunka auto-detection system discovered OT source at (RA, Dec) = 20h 05m 18.34s +86d 34m 34.7s on 2016-10-27.57641 UT.
The OT unfiltered magnitude is 17.1m (mlim=19.4m).
The OT is seen in 5 images. We have reference image without OT on 2012-03-11.91253 UT with unfiltered mlim=18.9m.
There is GSC2.3.2 star in 0.3" and GALEX source in 1.9", so we suggest accretion process and dwarf nova nature of OT with ampl>2.5
Spectral observations are required.
The discovery and reference images are http://master.sai.msu.ru/static/OT/MASTEROTJ200518.34+863434.7.jpg

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net