Central Bureau for Astronomical Telegrams
IAUC 8134: 2003ef, 2003eg, 2003eh, 2003ei, 2003ej, 2003ek
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Circular No. 8134
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVAE 2003ef, 2003eg, 2003eh, 2003ei, 2003ej, 2003ek
Further to IAUC 8131, M. Ganeshalingam, J. Graham, H. Pugh,
and W. Li report the discovery of several supernovae on unfiltered
KAIT images:
SN 2003 UT R.A. (2000.0) Decl. Mag. Offset
2003eg May 17.3 12 50 58.33 -14 20 01.1 15.8 16".7 E, 3".2 S
2003eh May 17.2 11 08 24.34 + 3 29 47.0 17.6 5".8 E, 5".6 S
2003ei May 19.4 16 28 40.30 +12 46 05.8 17.2 4".6 W, 9".5 N
2003ej May 20.3 12 39 11.10 + 0 43 30.4 16.5 4".0 W, 28".2 N
2003ek May 20.5 17 18 32.50 +41 40 00.8 18.2 3".6 E, 5".1 S
The offset of SN 2003ei is from the northern component of UGC 10402.
Additional approximate magnitudes: SN 2003eg in NGC 4727, Apr. 14.3
UT, [18.5; May 18.3, 15.8. SN 2003eh in MCG +01-29-3, May 1.2,
[18.5; 18.3, 17.6. SN 2003ei, Mar. 31.5, [19.5; May 20.4, 16.9.
SN 2003ej in UGC 7820, May 11.3, [18.5; 21.3, 16.3. SN 2003ek, May
12.5, [19.0; 21.3, 18.2.
Further to IAUC 8129, T. Matheson, P. Challis, and R. Kirshner
report on spectroscopy (range 370-750 nm) obtained by M. Calkins
with the Mt. Hopkins 1.5-m telescope. A spectrum of SN 2003ef (cf.
IAUC 8131), obtained on May 21.19 UT, shows it to be a type-II
supernova, displaying a continuum with well-developed hydrogen
P-Cyg lines; adopting the NASA/IPAC Extragalactic Database (NED)
host-galaxy recession velocity (4103 km/s), the expansion velocity
derived from the minimum of the H_beta line is 7900 km/s. A
spectrum of SN 2003eg (May 21.21), showing it to be a type-II
supernova, consists of a blue continuum with incipient P-Cyg lines
of hydrogen. The NED host-galaxy recession velocity is 7495 km/s,
but narrow lines from an H II region superposed on the spectrum of
the supernova indicate a recession velocity of 4360 km/s; adopting
the latter value, the expansion velocity derived from the minimum
of the H_beta line is 10000 km/s. A spectrum of SN 2003eh (May
21.17) shows it to be a reddened type-Ia supernova near maximum;
there is a strong (EW about 0.3 nm) Na I D absorption line at the
velocity of the host galaxy. Adopting the NED host-galaxy
recession velocity (7651 km/s), the supernova expansion velocity is
10300 km/s for Si II (rest 635.5 nm). The spectral-feature age
(Riess et al. 1997, A.J. 114, 722) of SN 2003eh is 2 +/- 2 days
before maximum light. A spectrum of SN 2003ei (May 21.23), showing
it to be a type-IIn supernova, displays a blue continuum with both
broad and narrow hydrogen emission lines; there are weak lines that
are consistent with Wolf-Rayet features, such as were seen in SN
1998S (e.g., Leonard et al. 2000, Ap.J. 536, 239).
(C) Copyright 2003 CBAT
2003 May 21 (8134) Daniel W. E. Green
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