[IAUC] CBET 689: 20061024 : SUPERNOVA 2006ld IN UGC 348

[IAUC mailing list]

                                                  Electronic Telegram No. 689
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 2006ld IN UGC 348
     The "Nearby Supernova Factory" collaboration (E. Pecontal and G.
Rigaudier, Centre de Recherche Astronomique de Lyon; P. Antilogus, S.
Gilles, R. Pain, and R. Pereira, Laboratoire de Physique Nucleaire et de
Haute Energies de Paris; C. Buton, Y. Copin, E. Gangler, and G. Smadja,
Institut de Physique Nucleaire de Lyon; G. Aldering, C. Aragon, S. Bailey,
S. Bongard, M. J. Childress, S. Loken, P. Nugent, S. Perlmutter, K. Runge,
R. Scalzo, R. C. Thomas, and B. A. Weaver, Lawrence Berkeley National
Laboratory, Berkeley; R. Kessler, Kavli Institute for Cosmological Physics,
Chicago; and C. Baltay, A. Bauer, D. Herrera, and D. Rabinowitz, Yale
University) reports the discovery of an apparent supernova (mag
approximately 16.0, calibrated to R) in images obtained on Oct. 19.3 UT
the QUEST II camera on the Palomar Oschin 1.2-m Schmidt telescope as a part
of the NEAT component (cf. CBET 263) of the Palomar-QUEST Consortium.  The
new object is located at R.A. = 0h35m27s.81, Decl. = +2d55'50".7 (equinox
2000.0).  Nothing is visible at this location on an image taken on Sept. 20
(approximate limiting mag 20.0).  The host galaxy, UGC 348, has z = 0.014
(Schneider et al. 1992, Ap.J. Suppl. 81, 5, via NED).
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 350-740 nm) of 2006ld,
obtained on Oct. 22.24 UT by W. Peters with the F. L. Whipple Observatory
1.5-m telescope (+ FAST), shows it to be a type-Ib supernova roughly 1-2
weeks past maximum light.  The spectrum exhibits conspicuous lines of He I
(rest 447.1, 587.6, 667.8, 706.5 nm).  Cross-correlation with a library of
supernova spectra shows that 2006ld is most similar to the type-Ib supernova
2004ao (cf. IAUC 8304) at +12 days from maximum brightness.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 October 24                  (CBET 689)               Daniel W. E. Green