IAU Central Bureau for Astronomical Telegrams

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IAUC 8430: 2004fv; 2004ao; C/1996 R3, P/2003 A1,, P/2004 A1

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IAUC number


                                                  Circular No. 8430
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


SUPERNOVA 2004fv IN NGC 6492
     L. A. G. Monard, Pretoria, S. Africa, reports his discovery of
an apparent supernova (mag 14.8 +/- 0.2) on unfiltered CCD images
obtained on Nov. 4.750 and 6.719 UT with a 0.30-m reflector.  The
new object is located at R.A. = 18h02m46s.38, Decl. = -66o25'54".7
(equinox 2000.0), which is 12" west and 5" south of the nucleus of
NGC 6492.  Nothing was visible at this location on Monard's image
taken on Oct. 16.8 (limiting red mag 18.0) or on a Digitized Sky
Survey image (limiting red mag 20.5).


SUPERNOVA 2004ao IN UGC 10862
     G. Gomez, Instituto de Astrofisica de Canarias (IAC); R.
Lopez, Universidad de Barcelona; and J. A. Acosta-Pulido, and the
LIRIS Team, IAC, report that an infrared image (yielding magnitude
J about 16.6) and a spectrogram (range 0.89-1.53 microns;
resolution about 700) were obtained of SN 2004ao (cf. IAUC 8299,
8304) on June 8.1 UT with the William Herschel Telescope (+ LIRIS).
Preliminary reduction of the spectrum shows absorption and emission
features superimposed on a nearly flat continuum, indicating that
the supernova had then reached the nebular phase.  The spectrum
shows a P-Cyg feature at 1.08 microns (absorption at 1.0430 microns
and emission at 1.0865 microns, at the rest wavelength of the host
galaxy); this feature is identified as He I 1.0830-microns in other
core-collapse supernovae (e.g., SN 1999ex, Hamuy et al. 2002, A.J.
124, 417; SN 1998bw, Patat et al. 2001, Ap.J. 555, 900).  Adopting
the NED host-galaxy recession velocity of 1691 km/s, the expansion
velocity derived from the minimum of the He I line is 11000 km/s.
Broad emissions at 0.924, 1.089, 1.1295, 1.130, and 1.190 microns
and absorptions at 0.9095, 0.979 and 1.0035 microns (all at the
host-galaxy rest wavelength), are also detected.  Tentative
identifications include the 1.1295-microns emission as O I 1.129-
microns (e.g., SN 1998bw at phase +51 days, Patat et al. 2001, Ap.J.
555, 900; SN 1998S at phases +56 and +110 days, Fasia et al. 2001,
MNRAS 325, 907) and the 0.924-microns emission as O I 0.9261-micron
(e.g., SN 1998S at phase +72.3 days, Fasia et al., op.cit.).


COMETS C/1996 R3, P/2003 A1, AND P/2004 A1
     The IAU Committee on Small Bodies Nomenclature has decided to
name three comets as follows:  C/1996 R3 (Lagerkvist), P/2003 A1
(LINEAR), P/2004 A1 (LONEOS).

                      (C) Copyright 2004 CBAT
2004 November 6                (8430)            Daniel W. E. Green

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