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THE ASTRONOMER Electronic Circular No 2371      2007 Sep 02 19.28UT
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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POSSIBLE VARIABLE IN CYGNUS FOUND AT CRNI VRH OBSERVATORY
Jure Skvarc, Bojan Dintinjana and Herman Mikuz, Crni Vrh Observatory, 
Slovenia report that in the course of Comet and Asteroid Search Program 
(PIKA) a possible variable star was detected on 4 unfiltered CCD images 
taken around 2007 Aug. 19.89UT with a 60-cm, f/3.3 Cichocki reflector. 
The new object is located at: RA 19:36:40.95, DEC +33:26:06.3 (2000). 
This position is accurate within about 0.2". The object is at magnitude 
about 15.2, +-0.05, roughly equivalent to R band.

There is a faint object at the edge of detectability close to this
position on POSSII J images obtained from Aladin.  Also, there is an 
object of mag 17.6R in in USNO A2.0 catalogue at:
RA 19:36:41.34, DEC +33:26:04.60 (2000).

In the meantime, we obtained the following R and B filter CCD photometry 
using a 0.60-m f/3.3 Cichocki reflector and USNO-B1 R2
catalogue:
2007 Aug. 23.870UT R=16.14 +/- 0.04; B=16.19 +/- 0.05
2007 Aug. 25.939UT R=16.35 +/- 0.07
2007 Aug. 26.880UT R=16.51 +/- 0.07; B=16.71 +/- 0.07
These measurements indicate that the object is in a slow decline.

Between 2007 Aug 25.855UT and Aug 25.979UT, we obtained 3 hours of
CCD R band photometry using the same telescope. The light curve
show quasi periodic 0.1-0.4 mag amplitude short oscillations
http://www.observatorij.org/Data/iauc/graf2.gif

We have probably not enough data to determine the variable type.
As we are unlikely to be able to obtain further observations in the next 
days due to bad weather, TA observers might want to take follow-up 
observations and possibly find the true nature of
this object.

Guy M Hurst