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[vsnet-campaign-news 91] AstroAlert: Possible Nova in Cygnus
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Possible Nova in Cygnus
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We have been informed that Yuji Nakamura, Mie, Japan, has discovered a
possible nova in Cygnus. The object was discovered from the photograph
(200mm F/4, Tri-X) taken on July 13.651 UT when the object was mag 11.9.
The existence of the object was confirmed at July 16.515 UT by
H. Fukushima (NAOJ) giving V = 11.69.
K. Kadota (Ageo, Saitama, Japan) reports the following accurate
astrometry on his CCD frames:
2001 07 17.735 UT
R.A. = 20h07m17s.94 Decl. = +36o04'37".2 (equinox J2000.0)
12 reference stars from GSC-ACT.
Mean residuals: 0.11" in R.A., 0.13" in Decl.
0.18-m f/5.5 reflector.
At this exact position, there is no star on DSS images to their limiting
magnitudes. There is no corresponding 2MASS star at this location.
Spectroscopic confirmation and follow-up photometric observations are
urgently requested.
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We have been undertaking on photometric campaigns on several super-
outbursting dwarf novae and peculiar variable stars. News and call for
observations on these objects will be issued on our regular weekly
"News from VSNET" bulletins. Those who immediately need information
should make an access to the VSNET website, and click on VSNET campaign
list.
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VSNET (Variable Star Network) is an international variable star observing
network, covering various areas of novae, supernovae, cataclysmic variables
(CVs), X-ray transients, and other classical eruptive, pulsating, and
eclipsing variables. VSNET is one of invited contributing organizations
to the SkyPub AstroAlert system.
VSNET Home Page: http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/
CCD observations of such targets are a relatively easy task for a 20-40cm
telescope; simply take as many CCD frames (with exposure times 10-30 sec)
as possible, spanning several hours per night. The only requirements are
the weather and your patience! If you need more help on the observing
technique, please feel free to ask on the vsnet-campaign list.
We would sincerely appreciate volunteers who would join the VSNET
Collaboration team to study the wonders of these exotic variable stars.
To join the VSNET campaign collaborative list, send an e-mail to
vsnet-adm@kusastro.kyoto-u.ac.jp (VSNET administrator)
with a line "SUBSCRIBE vsnet-campaign." or your comment to join the
collaboration team.
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vsnet-adm@kusastro.kyoto-u.ac.jp
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