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THE ASTRONOMER Electronic Circular No 2818      2012 May 05 19.23UT
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 OPTICAL TRANSIENT J182201.93+324906.7
P. Balanutsa et. al., Moscow State University and others report 
discovery on The Astronomer's telegram 4084 of a cataclysmic variable in 
Lyra with a preliminary designation of MASTER OT J182201.93+324906.7.

The MASTER-Amur auto-detection system discovered the optical transient 
of unfiltered magnitude 15.4 on 2012 April 29.791UT at:
RA 18h 22m 01.93s DEC +32d 49m 06.7s.
The object was on two frames with a limiting magnitude of 17.7.
The object was not present on 2011 June 2.933UT to a limit of magnitude 
18.8 (unfiltered). There is a faint (B~21.5m) blue star at the position 
on digitised Palomar plates, but not in USNO-B
or GSC catalogues. The sum of measures of POSS-II plates gives:
RA 18h 22m 01.94s DEC +32 49' 08.4" (2000).

However they have found one previous outburst of this object from 
scanning 15 Palomar images on five nights of 1997-1998. The object is on 
three of them and brightened to about magnitude 17 on 1998 August 18.

The object is present in the GALEX catalogue with the following 
ultraviolet magnitudes:
GALEX J182201.9+324908 FUV=21.19+/-0.46 NUV=21.54+/-0.30

Based on the blue colour, amplitude and detection of the previous 
outburst they conclude that MASTER OT J182201.93+324906.7 is a new 
cataclysmic variable (dwarf nova) in bright outburst, most likely a 
superoutburst.

The discovery and reference images are available at:
http://observ.pereplet.ru/images/182201.93324906.7.png

THE ASTRONOMER, 2012 APRIL ISSUE
Further to the note on TA E-Circular 2817 a number of UK-based 
subscribers to the paper magazine have reported receiving their copies, 
which were posted back on April 20, during the period May 3-5. Where 
Internet addresses were available for these subscribers the editor sent 
printer's PDF on May 2. If UK readers still require the paper copy as 
well as PDF and it has not arrived please contact Bob Dryden.

I have not so far heard from overseas subscribers so please update me as 
to whether it arrived and the date please.

Regrettably Royal Mail refused to receive and process a complaint about 
the delay until two weeks from the estimate delivery date (5 days after 
despatch) had elapsed.

Guy M Hurst