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IAUC 7990: 2002gf, 2002gg,, 2002gh; 2002ge; 2002gd

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                                                  Circular No. 7990
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)


SUPERNOVAE 2002gf, 2002gg, AND 2002gh
     Further to IAUC 7983, W. M. Wood-Vasey, G. Aldering, P.
Nugent, and R. Rudas report the discovery of three apparent
supernovae on unfiltered Palomar NEAT CCD images.

SN       2002 UT          R.A. (2000.0) Decl.   Mag.   Offset
2002gf   Sept.27.11   20 55 17.88  - 0 04 21.4  19.4  9" W, 3" N
2002gg   Oct.  5.18   22 27 45.93  + 6 55 44.7  20.0  6" SE
2002gh   Oct.  5.41    3 05 29.46  - 5 21 57.0  19.3  8".7 E, 6" N

Additional unfiltered magnitudes (the prediscovery limiting
magnitudes are given for S/N = 5): SN 2002gf, 2001 Sept. 14, [21.0;
2002 Sept. 4, [21.0; Sept. 28, 19.3.  SN 2002gg, 2001 Sept. 25,
[21; 2002 Sept. 4, [21; Oct. 6, 20.1.  SN 2002gh, 2001 Sept. 27,
[21.2; Dec. 14, [21.2; 2002 Oct. 6, 19.2.


SUPERNOVA 2002ge IN NGC 7400
     M. Salvo, Australian National University (ANU); and T. Hua,
Laboratoire d'Astrophysique de Marseille, report that two spectra
(ranges 460-560 and 620-720 nm) of SN 2002ge (cf. IAUC 7987) were
taken with the ANU 2.3-m telescope (+ Double Beam Spectrograph) at
Siding Spring Observatory on Oct. 9.52 UT.  Although the wavelength
ranges are rather small, the two spectra suggest a resemblance to
that of a type-Ia supernova about 10 days after maximum light.
     B.-G. Andersson, Johns Hopkins University; S. Potter, South
African Astronomical Observatory (SAAO); P. Garnavich, University
of Notre Dame; and G. Sonneborn, Goddard Space Flight Center, NASA,
report that calibrated spectra of SN 2002ge (resolution 0.2 nm),
obtained on Oct. 8.94 UT with the SAAO 1.9-m telescope, show an
average flux of 10**-14 erg s**-1 cm**-2 A**-1.  One spectrum
(range 350-550 nm) is that of a type-I supernova.  They add:  "The
flux deficit around 410-420 nm is similar to that of the type-Ic SN
1994I, a few days before maximum, but subluminous type-Ia
supernovae can also show this depression."


SUPERNOVA 2002gd IN NGC 7537
     CCD V magnitude estimates for SN 2002gd from A. Klotz (cf.
IAUC 7986) and C. Jasinski (J), with the background-galaxy light
now subtracted:  Sept. 15.95 UT, [18.0; Oct. 5.87, 17.9 (discovery
image, revised); 6.83, 17.7; 7.83, 17.3 (J); 8.78, 17.5.

                      (C) Copyright 2002 CBAT
2002 October 9                 (7990)            Daniel W. E. Green

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