2008CBET.1576....1F -
Central Bureau Electronic Telegrams, 1576, 1 (2008/November-0)
Supernova 2008ha in UGC 12682.
FOLEY R.J. and WRIGHT N.
Abstract (from CDS):
R. J. Foley, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf of the CfA Supernova Group, reports that a spectrum (range 350-740 nm) of 2008ha (cf. CBET 1567), obtained on Nov. 18.18 UT by N. Wright with the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a type-Ia supernova, similar to the peculiar supernova 2002cx (see Jha et al. 2006, A.J. 132, 189, for a review of this class of objects). The spectrum is similar to SN 2002cx (Li et al. 2003, PASP 115, 453) at 10 days past maximum light – but with a velocity about 3000 km/s lower. Puckett et al. reported that 2008ha brightened between Nov. 7 and 9 by 0.6 mag (CBET 1567), requiring that the phase of the supernova at the time of this spectrum to be < 9 days after maximum brightness. If the unfiltered light curve is similar to that of the R-band light curve of SN 2002cx, the spectrum of 2008ha should be < 17 days past maximum in the B band, consistent with the phase estimate. From the minimum of the weak absorption line corresponding to Fe II 455.5-nm, a velocity of -3000 km/s is measured, significantly lower than that of SNe 2002cx and 2005hk (approximately -5000 km/s and constant for < 60 days; Phillips et al. 2007, PASP, 119, 360).
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