Central Bureau for Astronomical Telegrams
IAUC 8057: 2003P; 2003L, 2003M,, 2003O
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Circular No. 8057
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVA 2003P IN MCG +09-13-107
Further to IAUC 8030, T. Boles reports the discovery of an
apparent supernova (mag 18.0) on unfiltered CCD images taken on
Jan. 23.916, 24.250, and 25.758 UT. The new object is located at
R.A. = 8h01m15s.63, Decl. = +55o44'34".8, which is approximately
3".5 east and 3".5 north of the center of MCG +09-13-107. SN 2003P
is not present on Boles' images from 2002 Nov. 3 (limiting mag
19.5) or Apr. 8 (limiting mag 19.0), and it is not present on
second Palomar Sky Survey red (1995) or blue (1998) plates or on
the Quick V northern plate (1984).
SUPERNOVAE 2003L, 2003M, AND 2003O
S. Valenti and E. Cappellaro, Universita di Napoli; S. Danese
and G. Di Pede, Universita di Padova; and H. Navasardyan, A.
Pastorello, S. Benetti, and M. Turatto, Istituto Nazionale di
Astrofisica, Padova, report that inspection of a reduced spectrum
(range 365-770 nm; resolution 2.3 nm), taken at the Asiago 1.82-m
telescope (+ AFOSC) on Jan. 25.00 UT, shows that SN 2003L (cf. IAUC
8048) is of type Ic, a few days after maximum. The spectrum shows
a relatively blue continuum and is dominated by strong P-Cyg lines
of Ca II (H and K) and Fe II. A relatively weaker Si II 635.5-nm
line is also visible. A low expansion velocity is derived from the
Si II line (about 5900 km/s). The redshift of the galaxy at the
supernova location, derived from a strong and narrow H-alpha
emission superimposed on the supernova spectrum, is about 6720 km/s.
Benetti et al. also obtained a spectrum (as above; range 365-
900 nm; resolution 3.5 nm at wavelength, lambda, > 770 nm) of SN
2003M: "The spectrum, after correction for the redshift of the
parent galaxy, reveals a strong resemblance to that of SN 1994I
around maximum light for lambda > 500 nm, but it shows weak Fe
lines at lambda < 500 nm. This confirms the physical association
of the supernova with the elliptical galaxy UGC 7224, even if the
supernova is located about 30000 pc from its nucleus. This is
possibly the first detection of a core-collapse supernova in an
early-type galaxy."
T. Matheson, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 370-750 nm)
of SN 2003O (cf. IAUC 8055), obtained by M. Calkins on Jan. 25.12
UT with the Mt. Hopkins 1.5-m telescope (+ FAST), shows it to be a
type-II supernova. Adopting the NASA/IPAC Extragalactic Database
recession velocity of 4941 km/s for the host galaxy, the expansion
velocity derived from the minimum of the H-beta line is 9100 km/s.
(C) Copyright 2003 CBAT
2003 January 25 (8057) Daniel W. E. Green
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