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THE ASTRONOMER Electronic Circular No 3030      2014 Oct 09 10.06UT
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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CH CYGNI: REAPPEARANCE OF OPTICAL CLICKERING
K. Stoyanov et. al., Institute of Astronomy and NAO, Bulgaria) report on The
Astronomer's Telegram 6560 that optical observations in B-band reveal the
reappearance of the flickering from the symbiotic star CH Cyg. On the night
of 2014 August 15, they observed CH Cyg with the 0.60-m Cassegrain telescope
of the National Astronomical Observatory Rozhen (Bulgaria) equipped with an
FLI PL9000 CCD camera. During a total of 1.61 h of observations, we detected
flickering with a peak-to-peak amplitude of 0.42 mag.  

During the time of the observing run, the brightness in B-band varied
between 7.76 and 8.18 mag, so the average brightness of the system seems to
have increased compared to the brightness during the time when the
flickering was absent (see ATel #4316). 

On the night of 2014 October 1, they observed CH Cyg again in U and B bands
with the same telescope for 1.5 hours. The peak-to-peak amplitudes of the
flickering in U and B bands were 0.37 and 0.28 mag respectively. The figure
shows light curves from 2014 August 15 and 2014 October 1, together with a
light curve from 2013 September 24, when the flickering was not detectable. 

Given the orbital period of roughly 15 years, the disappearance of
flickering in the past years (2010 - 2013) was likely due to an eclipse of
the white dwarf. Now that the flickering is prominent, the system must be
out of eclipse. 

Light curves of CH Cyg: http://www.astro.bas.bg/~rz/CHCyg/CHCyg.201410.eps

SUPERNOVA 2014cm IN PGC 61452 (S. PARKER)
2014cm  May 30.51   18 08 30.60  -52 04 11.4  18.0r  1  "W   10  "S 
An image of the object can be seen at: http://tinyurl.com/mpmn45d
M. Childress: spectrum June 11 shows type-II about two months past maximum.
There is also a good match with SN 2004et at phase +71 days.
(Based on CBAT issue August 31).


Guy M Hurst