Electronic Telegram No. 654
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html


SUPERNOVAE 2006ho-2006ht
     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 and D. McGinnis,
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 six new
supernovae on multiple g, r, and i images taken with the SDSS 2.5-m
telescope at APO by the SDSS observing team.  Romani, Zheng, Sako, Wheeler,
and Schneider, together with U. Hopp (University of Munich) and W.
Kollatschny (University of Goettingen), report that spectroscopic
observations with the Hobby Eberly Telescope on Sept. 27-29 UT show that
2006hp and 2006hs are type-Ia supernovae.  Spectroscopic observations by P.
Garnavich and J. Prieto with the Kitt Peak National Observatory 4-m
telescope on Sept. 27 show that 2006ht is a type-Ia supernova and that 2006hq
is a probable type-Ia supernova.  J. Marriner and D. McGinnis report that
observations with the ARC 3.5-m telescope at APO on Sept. 27 indicate that
2006ho is a type-II supernova and that 2006hr is a probable type-Ia supernova.
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
2006ho   Aug. 28    0 33 28.05  - 0 19 12.9   19.6   0.11   Sept. 7
2006hp   Sept.16    0 24 14.32  - 0 14 53.7   23.0   0.25   Oct.  2
2006hq   Sept.16   23 39 47.15  + 0 12 18.8   22.4   0.07   Sept.25
2006hr   Sept.17    1 50 15.55  - 0 53 14.1   20.9   0.16   Sept.26
2006hs   Sept.17    2 36 04.86  - 0 59 39.0   22.4   0.26   Sept.17
2006ht   Sept.20   21 12 47.66  + 0 54 58.8   23.0   0.20   Oct.  5


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 September 29                (CBET 654)               Daniel W. E. Green