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THE ASTRONOMER Electronic Circular No 3180      2016 Jun 26 16.48UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise,  Basingstoke,
Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074
INTERNET: GUY@TAHQ.DEMON.CO.UK      Backup: gmh@wdcc1.bnsc.rl.ac.uk
WORLD WIDE WEB                         http://www.theastronomer.org
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MASTER OT J095958.98-190100.6 DWARF NOVA OUTBURST

P. Balanutsa et. al. (SAAO) and others report on ATEL #9174 that 
MASTER-SAAO auto-detection system discovered an OT source at:
RA 09h 59m 58.98s DEC -19 01' 00.6" on 2016 June 17.77954UT.

The OT unfiltered magnitude is 13.3m (limit 18.8m).
It is seen in three images. There is no minor planet at this place.

There is a reference image without the OT on 2016 Apr 12.80183UT with an
unfiltered magnitude limit 19.8. 

There is an USNO-B1 star with B=20.71,R=20.70 and GALEX source, suggesting a
dwarf nova outburst with current amplitude greater than seven magnitudes.

Spectral observations are required. 

The discovery and reference images are available at
http://master.sai.msu.ru/static/OT/095958.98-190100.6.png

This OT is also present on the ASASSN page (independent detection?) 

Guy M Hurst