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THE ASTRONOMER Electronic Circular No 2250      2006 Jly 29 19.37UT
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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V1316 CYGNI
Jeremy Shears has asked us to relay the following appeal which, in part, 
has been extracted from a recent AAVSO Notice:

Gary Poyner, Jeremy Shears and David Boyd have requested help in 
monitoring the dwarf novae V1316 Cyg for outbursts in the current 
observing season.

Typically, V1316 Cyg experiences many brief outbursts that can last from 
less than a day to 3 days with an amplitude of less than two magnitudes. 
Poyner et al. have recently authored a paper describing this behaviour 
for the BAA Journal. It is available online in preprint form at this 
URL:

            http://arxiv.org/abs/astro-ph/0605284

On 2006 June 7, shortly after the paper was accepted for publication, 
the first ever detected superoutburst of V1316 Cyg was observed.  It 
reached around 15.2 magnitude from a quiescence of around 17.6.

V1316 Cyg is located at 20:12:13.67 +42:45:51.4 (J2000). AAVSO charts 
with Henden BV photometry are available at this URL:

http://www.aavso.org/cgi-bin/searchcharts3.pl?name=V1316%20Cyg

WARNING! Note that historically V1316 Cyg was often misidentified in the 
field. There is a bright field star ('148' on the AAVSO chart) 12 arcsec 
distant, which may itself be variable. To observe V1316 Cyg, please make 
sure you are using the latest charts and a small photometric aperture to 
avoid the companion. If you feel like it, also report observations of 
the 148 comp star as "2008+42B" or "148 Comp W".

Below are the main questions Poyner, Shears & Boyd are interested in 
addressing with the campaign:

1: Are the brief outbursts we have observed in 2005/2006 still 
occurring, or were they precursor phenomenon to the most recent 
superoutburst?

2: Do the brief outbursts continue as before unaltered, or will the 
cycle/amplitude changed because of the superoutburst?

3: Will V1316 Cyg undergo more superoutbursts, normal type outbursts or 
return to the brief outbursts?

Guy M Hurst