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IAUC 8130: 2003ee; 2003dq, 2003dt; 2003ec

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IAUC number

                                                  Circular No. 8130
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

     Further to IAUC 8117, W. M. Wood-Vasey, G. Aldering, and P.
Nugent report the discovery of an apparent supernova (mag 16.5) on
unfiltered NEAT images taken with the Palomar 1.2-m Schmidt
telescope on Mar. 28.20-28.24 UT.  The new object is located at
R.A. = 11h33m24s.50, Decl. = -9 59'26".4 (equinox 2000.0), which is
1" east and 1" south of the center of the apparent host galaxy.
Additional NEAT magnitudes from observations at Palomar and
Haleakala:  2002 Apr. 5.20, [21.6; 2003 Feb. 9.51, [21.0; Mar.
3.58, 17.8; 27.32, 16.5; Apr. 7.34, 16.5; 10.13, 16.5; 11.22, 16.6.
     M. Phillips and M. Hamuy, Carnegie Observatories, report that
a spectrum (range 360-900 nm) of SN 2003ee, obtained on May 5.10 UT
with the Las Campanas Observatory Clay 6.5-m telescope (+ LDSS-2),
shows it to be a type-IIn supernova characterized by a blue
continuum and strong Balmer lines in emission, at a redshift of
     K. Krisciunas, National Optical Astronomy Observatory, reports
that photometry on Apr. 21.223 UT with the Las Campanas 1-m
telescope yields the following magnitudes for SN 2003ee:  B =
16.628 +/- 0.024, V = 16.548 +/- 0.017, I = 16.383 +/- 0.024.

SUPERNOVAE 2003dq AND 2003dt
     Phillips and Hamuy add that a spectrum of SN 2003dq (cf. IAUC
8117), taken on May 5.06 UT, shows it to be a type-II supernova
with Balmer lines exhibiting P-Cyg profiles, although the H_alpha
absorption is very weak.  The expansion velocity of -7800 km/s,
derived from the minimum of H_alpha (based on a redshift of 0.046,
derived for the host galaxy from superimposed narrow emission
Balmer lines), suggests that SN 2003dq is several weeks old.  A
spectrum of SN 2003dt (cf. IAUC 8120), taken on May 5.35, shows it
to be a type-Ia supernova, about 3 months past maximum light.

     K. Itagaki, Teppo-cho, Japan, reports (via S. Nakano) that his
unfiltered CCD images taken on 2001 May 13 and 2002 May 3 with a
0.60-m reflector clearly show the object reported by Chen et al. on
IAUC 8128.  Phillips and Hamuy also note that a spectrum of 2003ec,
taken as above on May 5.33 UT, shows a blue, featureless continuum.

                      (C) Copyright 2003 CBAT
2003 May 6                     (8130)            Daniel W. E. Green

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