[IAUC] CBET 680: 20061019 : SUPERNOVAE 2006jf-2006kd

Vie Jun 22 17:04:37 ART 2007

                                                  Electronic Telegram No. 680
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 2006jf-2006kd
     Further to CBETs 611 and 667, 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 25 new
supernovae on multiple g, r, and i images taken with the SDSS 2.5-m
telescope at APO by the SDSS observing team.  A. Aragon-Salamanca,
University of Nottingham; M. Bremer, University of Bristol; M. Turatto,
University of Padova; A. Goobar, University of Stockholm; R. Nichol; J.
Sollerman, University of Copenhagen; P. Ruiz-Lapuente and F. Castander,
University of Barcelona; A. Romer, University of Sussex, C. Collins,
Liverpool John Moores University; and J. Lucey and A. Edge, University of
Durham, report that spectroscopy obtained by M. Smith and M. Stritzinger
on Oct. 15 and 16 UT with the European Southern Observatory 3.6-m New
Technology Telescope shows thirteen of the supernovae (2006jh, 2006ji,
2006jn, 2006jp, 2006jq, 2006jr, 2006js, 2006jt, 2006jy, 2006jz, 2006kb,
2006kc, and 2006kd) to be type-Ia events; 2006ju and 2006jw to be
probable type-Ia supernovae; 2006jo to be a type-Ib supernova; and 2006jl
to be a type-IIn supernova.  Spectroscopic observations with the Subaru 8-m
telescope by N. Takanashi, Y. Ihara, T. Morokuma, K. Tokita, K. Konishi,
and N. Yasuda on the same night indicate that six of the events (2006jg,
2006jj, 2006jk, 2006jm, 2006jv, and 2006ka) are type-Ia supernova, and
2006jx is a possible type-Ib supernova; they also report that a Subaru
spectrum taken on Sept. 18 UT shows 2006jf to be a 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 dates) are approximate estimates from early fits to the
multi-band light curves or from the spectra.

SN       Discov.       R.A. (2000.0) Decl.     Mag.    z    Estimated
         Date UT                                            Peak Date
2006jf   Sep. 15    22 34 54.57  + 0 00 07.3   22.4   0.28   Sep. 15
2006jg   Sep. 17    22 48 26.64  - 0 26 07.0   23.0   0.33   Sep. 29
2006jh   Sep. 19     0 06 45.75  - 0 02 12.4   22.6   0.13   Oct.  5
2006ji   Sep. 20    20 32 46.79  + 0 55 37.5   21.7   0.18   Oct.  1
2006jj   Sep. 27    20 59 34.81  + 1 13 23.7   21.4   0.27   Oct.  5
2006jk   Sep. 27    21 52 57.70  + 0 15 13.7   22.7   0.29   Oct. 10
2006jl   Sep. 29    20 32 04.67  - 0 34 28.3   19.8   0.05   Oct.  5
2006jm   Sep. 29    22 54 12.27  + 1 03 02.3   22.8   0.33   Oct.  8
2006jn   Sep. 30     0 30 39.18  + 0 08 29.7   23.1   0.23   Oct. 17
2006jo   Sep. 30     1 23 14.72  - 0 19 46.7   21.1   0.08   Oct.  5
2006jp   Sep. 30    20 56 56.22  - 0 16 44.6   21.7   0.16   Oct. 12
2006jq   Oct.  1     3 37 06.50  + 0 00 33.7   22.7   0.13   Oct. 15
2006jr   Oct.  1     3 39 47.15  + 0 59 34.2   22.5   0.18   Oct. 13
2006js   Oct.  1    20 55 20.06  - 0 05 34.0   22.6   0.19   Oct. 10
2006jt   Oct.  2    21 58 48.06  + 0 11 51.8   21.9   0.14   Oct. 17
2006ju   Oct.  2    23 24 39.01  - 0 43 06.0   21.9   0.15   Oct. 13
2006jv   Oct.  3     1 30 32.21  + 0 13 11.2   23.3   0.37   Oct. 10
2006jw   Oct.  3     2 23 22.30  + 0 49 08.4   22.5   0.25   Oct. 16
2006jx   Oct.  3     3 52 14.06  + 0 17 31.5   22.8   0.25   Oct. 12
2006jy   Oct.  4     1 02 56.34  + 0 10 59.2   21.7   0.2    Oct. 18
2006jz   Oct. 11     0 11 24.80  + 0 42 09.8   21.9   0.20   Oct. 24
2006ka   Oct. 11     2 18 26.68  + 0 13 36.0   21.9   0.25   Oct. 16
2006kb   Oct. 12    20 19 10.21  - 1 03 52.2   20.2   0.14   Oct. 16
2006kc   Oct. 12    22 30 10.61  - 0 24 28.2   21.0   0.22   Oct. 16
2006kd   Oct. 13     1 07 50.00  + 0 49 41.5   21.2   0.13   Oct. 10


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

                         (C) Copyright 2006 CBAT
2006 October 19                  (CBET 680)               Daniel W. E. Green