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IAUC 8235: 2003jg; 2003 QY_90; V838 Mon

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IAUC number

                                                  Circular No. 8235
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
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SUPERNOVA 2003jg IN NGC 2997
     R. Martin, Perth Observatory, reports the discovery, on CCD
images taken on Oct. 24.800 and 28.752 UT with the 0.61-m
Perth/Lowell Automated Telescope in the course of the Perth
Automated Supernova Search, of an apparent supernova (red mag 17)
located in NGC 2997.  J. Biggs, Perth Observatory, writes that
three unfiltered exposures taken with the 25-cm Mike Candy
Telescope around Oct. 29.778 show the new object (R = 17 +/- 1) at
the following position:  R.A. = 9h45m37s.91 +/- 0".3, Decl. =
-31o11'21".0 +/- 1".0 (equinox 2000.0), which is approximately 11"
east and 6" north of the galactic nucleus.  Martin adds that
nothing is visible at this location on an image taken on Sept.
25.876 (limiting mag 19), but the object does appear, just above
the noise threshold, in an image taken on Oct. 5.850.

2003 QY_90
     J. L. Elliot, Massachusetts Institute of Technology (MIT),
reports that Sloan-r'-band observations, obtained by S. D. Kern
(MIT) at the 6.5-m Clay telescope (+ MagIC) on Oct. 23 UT in about
0".5 seeing, reveal highly elongated images of 2003 QY_90 (cf. MPEC
2003-Q58).  The consistency of the images over the 1.9-hr interval
between the first and last frames rules out a blend with a
background field object.  Interpreting each elongated image as a
pair of unresolved sources, analysis by K. B. Clancy (MIT), Kern,
and Elliot implies the following properties:  both objects are
nearly identical in brightness [Delta(r') = 0.1 +/- 0.2]; the
separation of the pair is 0".34 +/- 0".02; and the line between the
two putative bodies has an approximate position angle of 129 +/- 5
deg.  Additional photometric and astrometric observations of 2003
QY_90 are strongly encouraged.

     M. Tapia, Instituto de Astronomia, Universidad Nacional
Autonoma de Mexico; and P. Persi, Istituto Astrofisica Spaziale e
Fisica Cosmica, report the following magnitudes observed with the
2.1-m telescope (+ mid-infrared camera CID) at San Pedro Martir on
Oct. 5.5 UT:  [8.7 microns] = 0.20, [9.7 microns] = -0.22, [12.5
microns] = -0.83, [19 microns] = -1.37.  The object is cooler and
has brightened at these wavelengths by about 2 magnitudes since
2002 Sept. (cf. IAUC 7976) when observed with the same instrument.

                      (C) Copyright 2003 CBAT
2003 October 29                (8235)            Daniel W. E. Green

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