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THE ASTRONOMER Electronic Circular No 3118      2015 Oct 25 17.10UT
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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HT CASSIOPEIAE
Kris Stanek reports an outburst of HT Cassiopeiae a dwarf nova (UGSU):
2015-10-21.27  <17.03; 2015-10-24.32   13.43 

Laszlo Kocsmaros reports confirmation:

20151024.8868  13.2  KLO

Gary Poyner also relays:
Oct 24.799, 13.3; 24.885, 13.1

GRB 151021A: OPTICAL COUNTERPART
Further to the announcement on TA E-Circular 3117. Dr. Vladimir Lipunov,
Sternberg Institute has sent us a personal message with further details of
the MASTER-SAAO auto-detection system’s discovery of the OT source at:
RA 22h 30m 34.43 DEC -33d 11m 50.2s on 2015-10-21.06257 UT at magnitude
14.9. By Oct 21.06404 it had faded to magnitude 15.9.
The OT was recorded on 20 images. There is no minor planet at this place.
A reference image is held without the OT of 2015-08-28.16118 UT with
unfiltered magnitude limit 19.6m.

The discovery and reference images are available at: 
http://master.sai.msu.ru/static/OT/223034.43-331150.2.png

Guy M Hurst