[IAUC] CBET 678: 20061018 : SUPERNOVA 2006je IN IC 1735

[IAUC mailing list]

                                                  Electronic Telegram No. 678
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


SUPERNOVA 2006je IN IC 1735
     R. Quimby and J. C. Wheeler, University of Texas, report that a
spectrum (range 420-890 nm), obtained on Oct. 18.17 UT with the 9.2-m
Hobby-Eberly Telescope (+ Marcario Low-Resolution Spectrograph) by J.
Caldwell and S. Rostopchin, shows 2006je (cf. CBET 675) to be a
peculiar type-Ia supernova.  The spectrum is similar to that of SN
1991bg around maximum light, but with deeper absorption around 475 and
510 nm, and relatively higher flux around 550nm and in the emission
component of the Si II 635.5-nm P-Cyg profile.  Correcting to the rest
frame of the host galaxy (z = 0.038; Wegner et al. 1999, MNRAS 305,
259), the expansion velocity derived from the minimum of the Si II
635.5-nm feature is 10200 km/s.  Quimby and Wheeler add that 2006je
was at mag about 17.8 on unfiltered CCD images taken on Oct. 17.17 and
18.16 with the 0.45-m ROTSE-IIIb telescope at the McDonald Observatory
(independent discovery); they note that the available photometry is
consistent with a subluminous type-Ia supernova at this redshift.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 October 18                  (CBET 678)               Daniel W. E. Green