Central Bureau for Astronomical Telegrams
IAUC 8277: 2004P; 2004J, 2004K,, 2004L
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Circular No. 8277
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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CBAT@CFA.HARVARD.EDU (science)
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Phone 617-495-7440/7244/7444 (for emergency use only)
SUPERNOVA 2004P IN UGC 8561
Further to IAUC 8274, J. Burket and W. Li report the LOSS
discovery, on a KAIT image taken on Jan. 23.5 UT (mag about 16.3),
of an apparent supernova located at R.A. = 13h34m57s.76, Decl. =
+34o02'33".7 (equinox 2000.0), which is 6".0 east and 4".5 south of
the nucleus of UGC 8561. The new object was confirmed at mag about
16.5 on an image taken on Jan. 27.5 by M. Schwartz and P. Holvorcem
with the 0.8-m Tenagra II telescope. A KAIT image taken on 2003
June 17.2 showed nothing at this position (limiting mag about 19.0).
T. Matheson, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 370-750 nm)
of SN 2004P, obtained by P. Berlind on Jan. 27.53 UT with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST spectrograph), shows it
to be a type-Ia supernova about three weeks past maximum.
SUPERNOVAE 2004J, 2004K, AND 2004L
Matheson et al. also report that a spectrum of SN 2004J (cf.
IAUC 8272), obtained as above on Jan. 27.20 UT, shows it to be a
type-Ia supernova about two weeks past maximum. Narrow emisson
lines superimposed on the spectrum of the supernova indicate a
recession velocity for the host galaxy of 7570 km/s. A spectrogram
of SN 2004K (cf. IAUC 8273), obtained by Berlind on Jan. 27.55,
shows it to be a type-Ia supernova about a week past maximum;
adopting the NASA/IPAC Extragalactic Database (NED) recession
velocity of 10832 km/s for the host galaxy, the supernova expansion
velocity is 11800 km/s for Si II (rest 635.5 nm). The spectral-
feature age (Riess et al. 1997, A.J. 114, 722) of SN 2004K is 8 +/-
2 days after maximum light. A spectrogram of SN 2004L (cf. IAUC
8274), obtained on Jan. 27.40, shows it to be a type-Ia supernova
near maximum; adopting the NED recession velocity of 9686 km/s for
the host galaxy, the supernova expansion velocity is 10000 km/s for
Si II (rest 635.5 nm). The spectral-feature age of SN 2004L is 1
+/- 2 days before maximum light.
C. L. Gerardy reports that a low-resolution optical
spectrogram (obtained as reported on IAUC 8275 for SN 2004I) of SN
2004L, obtained on Jan. 25.29 UT, shows it to be a type-Ia
supernova shortly after maxiumum light; adopting from NED a
redshift of 9686 km/s for MCG +03-27-38, the expansion velocity of
the Si II feature (rest 635.5 nm) is 9600 km/s.
(C) Copyright 2004 CBAT
2004 January 27 (8277) Daniel W. E. Green
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