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MASTER: 2 PSNe and 3 OTs

ATel #9514; T. Pogrosheva, O. Gress, P. Balanutsa, V. Lipunov (Lomonosov MSU), D. Buckley(SAAO),R. Rebolo Lopez, M. Serra Ricart (IAC), Podesta R. (OAFA), Levato H.(ICATE), N. Tiurina, E. Gorbovskoy, A. Kuznetsov, V. Kornilov, V. Shumkov (Lomonosov MSU, SAI), N. Lodieu (IAC), Saffe C.(ICATE), Lopez C., Podesta F.(OAFA), J. Rabinovich, K. Ivanov, N. Budnev (ISU)
on 20 Sep 2016; 09:52 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Cataclysmic Variable, Supernovae, Transient

MASTER OT J054231.15-262533.9 discovery - PSN in 1.2"W,13.6"S of PGC147795

MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 05h 42m 31.15s -26d 25m 33.9s on 2016-09-20.06426 UT.
The OT unfiltered m=17.3m (mlim=18.7m).
The OT is seen in 4 image. There is no minor planet at this place.We have 2 images with marginally seen m_OT~18.8 (m_lim=18.8) on 2016-09-15 00:33:04UT.
We have reference image without OT on 2015-10-12.04648 UT with unfil.mlim=20.6m, on 2016-05-11 17:26:03UT,m_lim=19.1, on 2016-07-19 03:48:06 with m_lim=19.0
This PSN is in 1.2"W,13.6"S of PGC147795(UVsource)
The discovery and reference images http://master.sai.msu.ru/static/OT/054231.15-262533.9.png

MASTER OT J203239.31-565835.8 discovery - PSN between 2 galaxies

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 20h 32m 39.31s -56d 58m 35.8s on 2016-09-18.80269 UT.
The OT unfiltered magnitude is 16.7m (mlim=19.1m).
The OT is seen in 3 image.
We have reference image without OT on 2015-03-29.06248UT with unfilt.mlim=20.5m, on 2016-08-10 18:59:41UT(m_lim=19.4).
There is no optical sources in SIMBAD4 rel 1.5.8.
There are 2 nearest galaxies: 6dFGS J203233.2-565911 (spiral, Bmag=17.01,Rmag=15.82) in 61.46" and PGC395099 (elliptical,Btot=15.47,Vhel=14478) in 31.9"W,67.3N".
Spectral observations are required.
The discovery and reference images http://master.sai.msu.ru/static/OT/203239.31-565835.8.png

MASTER OT J200519.83-485353.6 detection - dwarf nova outburst, ampl>3.2m

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 20h 05m 19.83s -48d 53m 53.6s on 2016-09-18.79304 UT.
The OT unfiltered magnitude is 17.0m (mlim=19.2m).
The OT is seen in 2 images 2016-09-18 19:14:10(17.0), on 2 images on 2016-09-19 23:30:51.639(17.5).
We have reference image without OT on 2016-09-17 19:08:30UT, m_lim=19.3.
There is m_OT=20.2 on 2015-04-12 02:11:34.994UT, m_OT=19.9 on 2015-10-05 20:37:25.764UT.
There is USNO-B1 star with B2=20.46, R2=19.57 and GALEX source.So we suggest the dwarf nova outburst with current ampl>3.2m
The discovery and reference images http://master.sai.msu.ru/static/OT/200519.83-485353.6.png

MASTER OT J213637.54-632843.2 detection - possibly dwarf nova outburst with ampl>5m

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 21h 36m 37.54s -63d 28m 43.2s on 2016-09-12.84509 UT.
The OT unfiltered magnitude is 16.6m (limit 19.0m).
The OT is seen in 2 images.
We have reference image without OT on 2015-10-06.90399 UT with unfilt.mlim=20.3m.
There is a GSC2.3.2 star with blue jmag=21.9 and GALEX UV source.It means the accretion and dwarf nova outburst with current ampl>5m
The discovery and reference images http://master.sai.msu.ru/static/OT/MASTEROTJ213637.54-632843.2.jpg

MASTER OT J224951.29+403802.7 discovery - new OT, possibly dwarf nova, ampl>5.4m

MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 22h 49m 51.29s +40d 38m 02.7s on 2016-09-19.13366 UT.
The OT unfiltered magnitude is 16.6m (mlim=18.1m). The OT is seen in 2 images. We have reference image without OT on 2016-09-03.00186 UT with unfiltered magnitude limit 20.2m. There is no any sources in VIZIER database inside 5".
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/224951.29403802.7.png

Spectral observations are required for all OT.
There is no minor planets at every position.

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net