From: Mamoru Doi (doi@ioa.s.u-tokyo.ac.jp)
Date: Thu Mar 27 2003 - 22:48:39 PST
Dear all,
I am going to submit the following draft on Mar.31 (JST)
unless I hear more suggestions or new information.
If you have something to add/correct etc., please tell me
during this week.
Cheers,
-Mamoru
ver.7 (Andy's suggestion is included.)
------------------------------------------------------------
M. Doi, Univ. of Tokyo, on behalf of the Supernova Cosmology
Project(cf. IAUC 7971, plus V. Fadeyev, B. Lee, V. Stanishev,
and R. Vogel) and the Subaru high-redshift supernova search
group (N. Yasuda, N. Kashikawa, K. Motohara, T. Morokuma,
K.Sekiguchi, G. Kosugi, H. Furusawa, Y. Komiyama, T. Takata,
M. Ouchi, Y. Ohyama, and Subaru Observatory SXDS Project members),
reports the discovery of 13 spectroscopically confirmed supernovae
and 9 probable supernovae found with Subaru telescope + Suprime-Cam
in SDSS i' band. Reference images were taken on Sep. 30 and Oct.1,
2002. The limiting magnitude of reference images was about 26.6mag
(S/N=5 for 2arcsec aperture). All supernovae listed below were
discovered on search images from Nov. 3.3 (UT). The magnitudes
of the SNe after subtraction from reference images are given in
the table below (photometric accuracy 0.1-0.2mag).
The supernova spectra were obtained with GMOS on Gemini-N on
Nov. 6, 8, and 9; with ESI on KeckII on Nov. 6, 7, 9,
and 10; with FORS2 on Yepun (VLT-UT4) on Nov. 7 - 11; and
with FOCAS on Subaru on Nov. 12. Redshifts were obtained for 13
SNe using either the host galaxy spectrum (denoted with *)
or with template spectrum fitting of a SN. SuF02-060 has
as spectrum consistent with a Type Ia SN, and it is in
an elliptical host galaxy.
SCPname R.A. (J2000) Decl. i' z type offset
SuF02-060 02:17:34.51 -04:53:46.6 24.5 1.063* Ia 0.0"
SuF02-017 02:16:45.71 -05:09:51.2 25.0 1.03 Ia no host
SuF02-025 02:16:23.93 -04:49:29.4 24.5 0.606* Ia 0.2" W
SuF02-001 02:17:00.05 -04:58:19.6 23.4 0.57 Ia 0.5" W
SuF02-065 02:17:34.53 -05:00:15.4 25.2 1.181* SN 1.3" SSE
SuF02-071 02:17:08.63 -05:02:06.4 23.8 0.928* SN 1.4" E
SuF02-037 02:17:43.30 -04:30:56.7 24.6 0.926* SN 0.4" E
SuF02-000 02:17:42.54 -05:06:34.0 24.8 0.92* SN 0.5" NE
SuF02-002 02:17:12.24 -04:55:08.7 24.4 0.823* SN 0.3" NW
SuF02-055 02:18:53.20 -04:32:59.2 23.7 0.66: SN 0.6" N
SuF02-082 02:18:40.73 -05:03:44.3 25.3 0.623* SN 1.1" NNW
SuF02-077 02:18:35.15 -04:26:38.9 25.1 0.59: SN 0.6" NW
SuF02-019 02:17:38.08 -05:08:46.8 24.5 0.505* SN 0.3" NW
We also report 9 probable SNe. Follow-up photometry was
carried out with Suprime-Cam, and we confirmed SN signals
on at least 3 epochs among 7 (Nov.3,6,10,28,30,Dec.7,8)
for all objects below. They are all either hostless or
offset from the host galaxy center, and have light curves
consistent with SNe, but do not have spectral confirmation.
SCPname R.A. (J2000) Decl. i' offset
SuF02-012 02:18:51.59 -04:47:24.8 25.1 0.2" N
SuF02-007 02:18:52.36 -05:01:13.2 24.8 no host
SuF02-028 02:16:56.37 -05:00:57.4 24.9 1.5" SE
SuF02-004 02:18:09.01 -04:54:17.9 25.1 0.6" SE
SuF02-086 02:17:16.18 -05:06:02.7 26.2 no host
SuF02-076 02:16:26.37 -05:04:32.5 26.1 no host
SuF02-056 02:20:00.03 -04:44:20.2 24.3 0.5" SE
SuF02-057 02:20:13.92 -05:07:36.0 25.6 no host
SuF02-J01 02:17:45.97 -04:36:46.2 25.2 0.2" W
Mamoru Doi
Institute of Astronomy
School of Science
University of Tokyo
voice +81-422-34-5084
fax. +81-422-34-5041
doi@ioa.s.u-tokyo.ac.jp
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