[IAUC] CBET 623: 20060917 : SUPERNOVAE 2006fa AND 2006fd-2006fn

Vie Jun 22 17:05:46 ART 2007

                                                  Electronic Telegram No. 623
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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CBAT en CFA.HARVARD.EDU (science)
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SUPERNOVAE 2006fa AND 2006fd-2006fn
     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 (UT); 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, UT; 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, UT; 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; D. Schneider, Pennsylvania State University; M.
Smith, UP; S. Snedden, APO; N. Takanashi and K. Tokita, UT; K. van der
Heyden, SAAO; S. Watters, APO; N. Yasuda, UT; and C. Zheng, SU, on behalf
of the Sloan Digital Sky Survey II collaboration, report the discovery of
eleven supernovae on multiple g, r, and i images taken with the SDSS 2.5-m
telescope at Apache Point Observatory by the SDSS observing team.  B.
Bassett, K. van der Heyden, and P. Vaisanen, SAAO, report that a spectrum
of 2006ff taken with the South African Large Telescope on Sept. 15 UT
shows it to be a type-Ia event.  A. Aragon-Salamanca, University of
Nottingham; M. Bremer, University of Bristol; M. Turatto, University of
Padova; A. Goobar, University of Stockholm; 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 R. Nichol and M. Smith on Sept. 15 and 16 with the European
Southern Observatory 3.6-m New Technology Telescope (NTT) shows eight of
the other new supernovae to be type-Ia events, while SN 2006fg is a type-II
event, and the type of SN 2006fe is not yet determined.  N. Yasuda reports
that three of the objects -- 2006fk, 2006fm, and 2006fi -- were confirmed
as type-Ia events on the same nights as the NTT observations via the Subaru
8-m telescope.  The discovery magnitudes tabulated below are all g
magnitudes, and the 2006 discovery dates are UT.  Spectroscopic redshifts
are given in the column labelled z.  Esimated peak g magnitudes and
corresponding dates (all 2006) are estimates from early fits to the
multi-band light curves.

SN      Discov.      R.A. (2000.0) Decl.     Mag.    z     Estimated Peak
        Date                                                Date      Mag.
2006fd   Aug. 27   20 37 53.25  +01 13 16.1   19.4   0.08   Aug. 17   19.0
2006fe   Aug. 27   20 52 09.16  -00 30 40.0   21.0   0.07   Sept. 1   20
2006ff   Aug. 28   00 26 35.64  -00 18 07.5   20.7   0.24   Aug. 26   20.7
2006fg   Aug. 28   00 38 20.04  -00 17 41.9   19.1   0.03   Aug. 29   18.5
2006fh   Aug. 28   01 49 34.91  -00 38 59.6   20.4   0.13   Aug. 20   19.8
2006fi   Aug. 28   22 19 50.26  +00 01 27.8   22.1   0.23   Sept. 9   21.1
2006fj   Sept.11   02 47 08.67  +00 46 30.5   20.3   0.19   Sept.12   20.3
2006fk   Sept.11   22 01 01.33  +00 42 58.5   21.3   0.16   Sept.13   21.2
2006fl   Sept.11   22 11 27.71  +00 45 21.5   20.3   0.17   Sept.10   20.3
2006fm   Sept.15   22 10 10.26  +00 30 11.8   20.2   0.13   Sept.12   20.2
2006fn   Sept.15   23 00 05.98  +00 32 15.6   20.6   0.18   Sept.12   20.6

     Also, an additional spectrum of SN 2006fa, listed as a possible
type-Ia event on CBET 621, was taken by R. Nichol and M. Smith with the
NTT, confirming it as a type-Ia supernova with a redshift of 0.16.


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

                         (C) Copyright 2006 CBAT
2006 September 17                (CBET 623)               Daniel W. E. Green