From: Mamoru Doi (doi@ioa.s.u-tokyo.ac.jp)
Date: Wed Mar 19 2003 - 04:34:39 PST
Dear Tony, Arial, Greg, Saul, and all,
I revised the SCP names. I also fixed the number of the SNe
in the first paragraph (29->30). Also we just write
"30 supernovae", not "possible 30 supernovae" following
Saul's suggestion.
I also change type of SuF02-065 from Ia to Ia?, since light curve
is quite flat as an SNIa.
>In the draft IAUC I didn't see mention of our probable SN at z ~ 1.3/1.5
>--- shouldn't we say something about it? Do we have enough of a
>lightcurve to say whether it is consistent with a SN? It seems that the
>spectrum is consistent with that of a SN of some type --- I think we're
>just debating what type should be assigned.
Greg, at the last video meeting, I thought, we agreed that we will discuss
(at least) 081 and 012 (z~1.3/1.5) in a paper, and won't mention about
redshift. So I put them to the 2nd category (no redshift and no type).
But it is true that the 2nd category is not homogeneous, since we have
spectrum information for some of them.
The problem is that if we add information to some of those
in the 2nd category, the rest may be regarded as not convincing as SNe.
Maybe we can move 012 back to the first category.
SuF02-012 Nov. 3.3 02:18:51.59 -04:47:24.8 25.1 1.3/1.5 Ia? 0.2" N
This is, of course, more impressive. High-Z team reported a SN at z=1.3
(no type) a while ago.
It depends on how confident we are in the redshift (1.3 or 1.5) for 012.
Do you think we can move?
I would like to discuss about this at the meeting soon.
Anyway the draft version 4 is attached below.
Cheers,
-Mamoru
Ver.4
---------------------------------------------------------------------
M. Doi, Univ. of Tokyo, on behalf of the Supernova Cosmology
Project(cf. IAUC 7971, plus B. Lee, R. Vogel and V. Stanishev) 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
30 supernovae found with Subaru telescope +prime-focus 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). We took search images on Nov. 3.
The magnitude increase of the SNe compared with the images in the
reference are given in the table below (photometric accuracy 0.1-0.2mag).
Follow-up photometry was carried out with Suprime-Cam, and we
confirmed SN signals at least 3 epochs among 7
(Nov.3,6,10,28,30,Dec.7,8) for 30 SNe below.
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 19
SNe using either the host galaxy spectrum or with template spectrum
fitting of SN.
SCPname 2002 UT R.A. (J2000) Decl. i' z type host info.
SuF02-065 Nov. 3.3 02:17:34.53 -05:00:15.4 25.2 1.181 Ia? 1.3" SSE
SuF02-060 Nov. 3.3 02:17:34.51 -04:53:46.6 24.5 1.063 Ia 0.0"
SuF02-007 Nov. 3.3 02:18:52.36 -05:01:13.2 24.8 1.18? Ia no host
SuF02-061 Nov. 3.3 02:17:22.73 -05:16:56.1 24.7 1.08? ? 0.0"
SuF02-017 Nov. 3.3 02:16:45.71 -05:09:51.2 25.0 1.03 Ia no host
SuF02-071 Nov. 3.3 02:17:08.63 -05:02:06.4 23.8 0.928 Ia 1.4" E
SuF02-037 Nov. 3.3 02:17:43.30 -04:30:56.7 24.6 0.926 Ia 0.4" E
SuF02-000 Nov. 3.3 02:17:42.54 -05:06:34.0 24.8 0.92 Ia? 0.5" NE
SuF02-005 Nov. 3.3 02:18:35.70 -04:31:11.0 24.6 0.863 ? 0.3" NE
SuF02-002 Nov. 3.3 02:17:12.24 -04:55:08.7 24.4 0.823 Ia? 0.3" NW
SuF02-021 Nov. 3.3 02:18:10.56 -04:40:20.6 24.6 0.69 Ia? 2.9" SSW
SuF02-055 Nov. 3.3 02:18:53.20 -04:32:59.2 23.7 0.66 Ia 0.6" N
SuF02-082 Nov. 3.3 02:18:40.73 -05:03:44.3 25.3 0.623 Ia? 1.1" NNW
SuF02-025 Nov. 3.3 02:16:23.93 -04:49:29.4 24.5 0.606 Ia 0.2" W
SuF02-077 Nov. 3.3 02:18:35.15 -04:26:38.9 25.1 0.59 Ia? 0.6" NW
SuF02-001 Nov. 3.3 02:17:00.05 -04:58:19.6 23.4 0.57 Ia 0.5" W
SuF02-019 Nov. 3.3 02:17:38.08 -05:08:46.8 24.5 0.505 Ia? 0.3" NW
SuF02-028 Nov. 3.3 02:16:56.37 -05:00:57.4 24.9 0.347? ? 1.5" SE
SuF02-059 Nov. 3.3 02:20:28.06 -04:58:50.3 25.7 0.269 Ia? 0.2" E
SCPname 2002 UT R.A. (J2000) Decl. i' host info.
SuF02-081 Nov. 3.3 02:20:07.55 -05:08:27.2 25.1 0.0"
SuF02-012 Nov. 3.3 02:18:51.59 -04:47:24.8 25.1 0.2" N
SuF02-083 Nov. 3.3 02:18:06.22 -05:00:38.1 26.0 0.4" S
SuF02-034 Nov. 3.3 02:18:31.21 -05:01:24.4 25.6 0.2" N
SuF02-004 Nov. 3.3 02:18:09.01 -04:54:17.9 25.1 0.6" SE
SuF02-086 Nov. 3.3 02:17:16.18 -05:06:02.7 26.2 no host
SuF02-076 Nov. 3.3 02:16:26.37 -05:04:32.5 26.1 no host
SuF02-J01 Nov. 3.3 02:17:45.97 -04:36:46.2 25.2 0.2" W
SuF02-051 Nov. 3.3 02:17:27.48 -04:40:45.2 25.4 no host
SuF02-057 Nov. 3.3 02:20:13.92 -05:07:36.0 25.6 no host
SuF02-056 Nov. 3.3 02:20:00.03 -04:44:20.2 24.3 0.5" SE
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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