[vsnet-campaign-news 172] Nova candidate

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

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           Nova Candidate reported by William Liller
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   William Liller (Vina del Mar, Chile) reports the following detection
of an eruptive object, which may be a nova.  Confirmatory observations
are urgently needed.
Date: Sun, 15 Sep 2002 15:28:54 -0400
From: "W.Liller" <wliller@compuserve.com>
Subject: Nova candidate

Hola everyone -

There seems to be a new stellar object at (2000) R.A. 18h 02.4m, Dec. -25d
18'.  It appears on three photos taken at U.T. Sept. 15.1102, 15.1227 and
15.1241 with an 80mm f/1.4 lens, orange filter and Kodak TP film; its
magnitude is approximately 8.5.  Nothing brighter than mag 11.5 appears on
two photos taken at U.T. Sept. 11.12.

Note that the magnitude is very uncertain owing to severe light pollution
produced by the 8-day-old moon about 8.5 degrees away.

I'd appreciate your confirmation -- or whatever -- since the weather here
in Vina del Mar has been very unstable.  I will, however, try to get a
spectrum, an improved position and some CCD magnitudes tonight.

All the best to all,   William Liller

===

Taichi Kato wrote in [vsnet-discovery-nova 84]:

    While the light variation suggests a nova, there is a strong IRAS/MSX5C
source close to this location (not registered as a variable star).
Possible identification with this source needs to be closely examined
as soon as possible.  If the identification is confirmed, an explosion of
such an IRAS source is quite unexpected.

180220.7 -251751 (2000.0) IRAS17592-2517 10.920 6.981 24.840L 440.400L 97%
180220.7 -251751 (2000.0) SSC17592-2517 10.920 6.981 24.840L 440.400L
180221.0 -251749 (2000.0) MSX5C_G005.0235-01.3649 -15 -8 7 8 6 6 V(%):-:-:2:5:3:3

Regards,
Taichi Kato
VSNET Collaboration team

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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.
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