[IAUC] CBET 650: 20060927 : SUPERNOVAE 2006hc-2006hm

Vie Jun 22 17:05:10 ART 2007

                                                  Electronic Telegram No. 650
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html


SUPERNOVAE 2006hc-2006hm
     Further to CBET 611, B. Bassett, South African Astronomical Observatory
(SAAO); A. Becker, University of Washington (UW); H. Brewington, Apache Point
Observatory (APO); C. Choi, Seoul National University (SNU); D. Cinabro,
Wayne State University; F. DeJongh, Fermilab; J. Dembicky, APO; D. L. DePoy,
Ohio State University (OSU); B. Dilday, University of Chicago (UC); M. Doi,
University of Tokyo (UoT); J. Frieman, Fermilab and UC; P. Garnavich,
University of Notre Dame; M. Harvanek, APO; C. Hogan, UW; J. Holtzman, New
Mexico State University; M. Im, SNU; S. Jha, Stanford University (SU); K.
Konishi, UoT; J. Krzesinski, APO; H. Lampeitl, Space Telescope Science
Institute (STScI); R. Kessler, UC; B. Ketzeback, D. Long, O. Malanushenko,
and V. Malanushenko, APO; J. Marriner, Fermilab; R. McMillan, APO; G.
Miknaitis, Fermilab; T. Morokuma, UoT; R. Nichol, University of Portsmouth
(UP); K. Pan, APO; J. L. Prieto, OSU; M. Richmond, Rochester Institute of
Technology; A. Riess, STScI; R. Romani, SU; M. Sako, University of
Pennsylvania; G. Saurage, APO; D. Schneider, Pennsylvania State University;
M. Smith, UP; S. Snedden, APO; N. Takanashi and K. Tokita, UoT; K. van der
Heyden, SAAO; S. Watters, APO; C. Wheeler, University of Texas; N. Yasuda,
UoT; and C. Zheng, SU, on behalf of the Sloan Digital Sky Survey II
collaboration, report the discovery of eleven new type-Ia supernovae on
multiple g, r, and i images taken with the SDSS 2.5-m telescope at APO by
the SDSS observing team.  The spectroscopic observations of 2006hc, 2006hf,
and 2006hl were obtained by P. Garnavich and J. Prieto with the Kitt Peak
National Observatory 4-m telescope on Sept. 26 and 27 UT, while spectroscopic
observations of the other eight new supernovae were made by Romani, Zheng,
Sako, Wheeler, and Schneider, together with U. Hopp (University of Munich)
and W. Kollatschny (University of Goettingen), with the Hobby Eberly
Telescope on Sept. 22-26.  The discovery magnitudes tabulated below are all
SDSS g magnitudes.  Spectroscopic redshifts are given in the column labelled
"z".  Peak dates (all 2006) are approximate estimates from early fits to the
multi-band light curves.

SN       Discov.      R.A. (2000.0) Decl.     Mag.    z    Estimated
         Date UT                                           Peak Date
2006hc   Sept.11    1 09 34.73  + 0 42 14.9   21.3   0.2    Sept.21
2006hd   Sept.11   21 44 03.55  + 0 43 34.6   21.6   0.30   Sept.12
2006he   Sept.11   22 04 24.11  + 0 41 28.4   21.9   0.21   Sept.21
2006hf   Sept.11   23 00 52.49  - 0 58 52.1   21.8   0.22   Sept.25
2006hg   Sept.16    1 40 58.41  - 0 43 40.3   21.9   0.24   Sept.15
2006hh   Sept.16    2 42 26.97  - 0 47 38.9   21.9   0.24   Sept.21
2006hi   Sept.17    1 23 46.04  + 0 49  0.0   23.0   0.26   Sept.24
2006hj   Sept.18   21 10 21.14  + 0 55 57.5   21.3   0.23   Sept.18
2006hk   Sept.18   23 20 29.54  - 1 09 28.2   21.3   0.29   Sept.18
2006hl   Sept.18   23 22 45.98  + 0 31 58.4   21.1   0.15   Sept.25
2006hm   Sept.18   23 26 14.81  - 0 22 56.1   22.2   0.33   Sept.10


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 September 27                (CBET 650)               Daniel W. E. Green