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IAUC 7979: 2002fs, 2002ft,, 2002fu; 2002fi, 2002fj

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                                                  Circular No. 7979
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 2002fs, 2002ft, AND 2002fu
     Further to IAUC 7905, W. M. Wood-Vasey, G. Aldering, and P.
Nugent report the discovery of three apparent supernova on
unfiltered Palomar NEAT images, as tabulated below; K. Li was also
involved with SN 2002ft.

SN       2002 UT          R.A. (2000.0) Decl.   Mag.   Offset
2002fs   Sept. 3.26   22 54 00.88  +14 39 24.5  20.1   2".5 E
2002ft         9.39   23 15 45.82  -16 55 35.2  18.9   1" E, 2" S
2002fu        10.21   22 09 55.99  +12 05 06.6  19.4   5" W, 1" N

The offset of SN 2002ft is with respect to "a faint nearby object",
as it is unclear whether the presumed galaxy center is actually a
galaxy or two blended stars.  Additional magnitudes from NEAT
images:  SN 2002fs, 2001 Oct. 6, [20.5; 2002 Aug. 4, [20.5; Sept.
11, 17.4.  SN 2002ft, Aug. 30, [20.5; Sept. 17, 18.1.  SN 2002fu,
2001 Nov. 5, [20.5; 2002 Aug. 22, [20.5; Sept. 3, [20.5; 11, 19.3.
     M. Hamuy, Carnegie Observatories, reports that spectra (range
360-900 nm) of these new objects were obtained on Sept. 28.18-28.23
UT with the Baade 6.5-m telescope (+ LDSS-2) at Las Campanas.  SN
2002fu is a type-II supernova with a broad H-alpha line exhibiting
a P-Cyg profile; the minimum of the absorption component yields an
expansion velocity of 14000 km/s.  A narrow H-alpha emission from
the host galaxy yields a redshift of 0.091.  SN 2002fs bears
resemblance to the type-Ia SN 1994D, five days past maximum; a
narrow H-alpha emission from the host galaxy yields a redshift of
0.038.  SN 2002ft also bears resemblance to SN 1994D, two days past
maximum; by comparison to SN 1994D, a redshift of approximately
0.075 is derived.


SUPERNOVAE 2002fi AND 2002fj
     Hamuy also writes that spectra were obtained, as above, for
these two supernovae on Sept. 26.29 and 26.39 UT.  SN 2002fi (cf.
IAUC 7972) is a type-Ia supernova whose spectrum bears strong
resemblance to SN 1994D, 20 days past maximum.  SN 2002fj (cf. IAUC
7973) is of type IIn, its spectrum dominated by a strong H-alpha
emission line of intermediate (700 km/s) width without appreciable
Doppler shift relative to the host galaxy; this emission is
superposed on a broad component.  No signs of He I lines are
present.

                      (C) Copyright 2002 CBAT
2002 September 30              (7979)            Daniel W. E. Green

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