[IAUC] CBET 667: 20061011 : SUPERNOVAE 2006iw AND 2006ix-2006ja

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                                                  Electronic Telegram No. 667
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVAE 2006iw AND 2006ix-2006ja
     Further to CBETs 611 and 657, 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 four new supernovae on multiple g, r,
and i images taken with the SDSS 2.5-m telescope at APO by the SDSS observing
team.  J. Marriner, D. McGinnis, and J. Dembicky report that spectroscopic
observations with the ARC 3.5-m telescope at APO on Oct. 2 UT indicate that
2006ix is a type-II supernova.  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 Oct. 9 indicate that 2006iy is a type-Ia supernova.  Prieto and
J. Eastman (OSU) report that spectroscopic observations, obtained with the
Hiltner 2.4-m telescope at MDM Observatory on Kitt Peak on Oct. 10, indicate
that 2006iz is a type-Ia supernova and 2006ja 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
2006ix   Sept. 16   23 59 14.03  - 0 18 39.7   22.6   0.08   Oct.  1
2006iy   Sept. 20   22 01 52.82  + 1 02 42.1   22.5   0.20   Oct.  5
2006iz   Sept. 30   21 16 17.20  + 0 33 34.2   21.1   0.12   Oct. 14
2006ja   Sept. 30   22 26 51.91  + 0 30 21.8   21.3   0.11   Oct. 14

Also, further to CBET 663, Prieto and Eastman report that a spectrum of
2006iw, obtained with the Hiltner 2.4-m telescope on Oct. 10, shows it to
be a type-II supernova.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 October 11                  (CBET 667)               Daniel W. E. Green