[vsolj-alert 220] possible SN in NGC 925

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

From owner-vsnet-alert@kusastro.kyoto-u.ac.jp Thu Dec 10 05:01 JST 1998
Date: Wed, 9 Dec 1998 15:00:46 -0500
From: "Steve H. Lucas" <76620.1721@compuserve.com>
To: ISN Alert <ISN_alert@mbox.queen.it>
Cc: vsnet alert <vsnet-alert@kusastro.kyoto-u.ac.jp>
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Subject: [vsnet-alert 2425] Possible SN in NGC 925
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Dear Supernovae Enthusiasts: =


I received this note just moments ago....
verification assistance is urgently required.

Cheers,

Steve

---------- Forwarded Message ----------

From:	Ian Wilson, INTERNET:irgeo@ozemail.com.au
TO:	"Steve H. Lucas", [76620,1721]
DATE:	12/9/98 1:21 PM

RE:	Possible SN in NGC 925

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To: 76620.1721@compuserve.com
From: Ian Wilson <irgeo@ozemail.com.au>
Subject: Possible SN in NGC 925 =


Dear Steve Lucas,

We need your help to try an confirm a very bright
supernova in NGC 925. Ron Knight discovered =

a 10 th mag possible SN approx 4.2 min south and =

2.3 west of the galaxy's nucleus at 12:05 UT 09 th
DEC 1998 - We tried getting a confimation observation =

here Australia but all sites were clouded out or =

NGC 925 was too low/just set.

Could you plase make a confimation observation
for us and then relay your confirmation to =


either :

Ian Wilson
Weipa, Queensland
Australia 4874
ph : 61 7 40699724
email : irgeo@ozemail.com.au

and Ron Knight =

        Cambroon Observatory
        Kenilworth , QLD
        Australia 4574
ph : 61 7 544 60908
 =

as sson as possible your help would be appreciated.

P.S. Here is the e-mail we are going to send off to
Brian Marsden - all we need is a confirming =

observation.

******************************************

Dear Brian Marsden,

Ian Wilson of the South East Queensland Astronomical
Society [Brisbane Australia] reports that Ron Knight of the
Cambroon Observatory, Kenilworth, Queensland, Australia
discovered a possible SN in the  galaxy NGC 925. The SN
was observed at 12:05 UT on the 9th DEC 1998 when it had
a visual magnitude of 10.5 (approx.). The SN is  located roughly
4.2 arc minutes south and 2.3 arc minutes [7.7 seconds
of time]  west of the nucleus.

Ron Knight used 290 X magnification on an 8 inch
Ultima Schmidt Cassegrain Telescope to make his
visual observations. Ron used the Thompson SN
Charts and a stored CCD image to confirm that
no star was present at the location of the SN candidate.

We have checked for :

i) movement - a subsequent observation was taken at 13:00 UT
                         on the 9th of Dec 1998 and no movement was
                         observed.

ii) change in brighteness - no change in apparent brighteness
                                               was observed by Ron Knight=
 at
13:00 UT

iii) asteroids - The CFA asteroid cite was checked and no known
                          asteroids, down to 18 th magnitude, are present=

                          within 30 arc minutes of NGC 925.

iv) confirmation observation



The galaxy NGC 925 is 10.5 x 5.9 arc minutes in size and so the
SN candidate is located within the galaxy proper, however, there
is always the chance that it is a forground [galactic] variable =

that appears to be superimposed on the galaxy. The brightness of the
possible SN candidate [ ~ 10.5 visual magnitude] is enough to =

warrant a report to CBAT, since SN of this brightness are relatively
rare.

Cheers

Ian Wilson =

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