other query modes : |
Identifier query |
Coordinate query |
Criteria query |
Reference query |
Basic query |
Script submission |
TAP |
Output options |
Object types |
Help |
2012CBET.3236....1C - Central Bureau Electronic Telegrams, 3236, 1 (2012/September-0)
Supernovae 2012ez and 2012fa.
CAPPELLARO E., BENETTI S., PASTORELLO A., TOMASELLA L., TURATTO M., PIGNATA G., BUFANO F., BOTTICELLA M.T., GRADO A., LIMATOLA L., VACCARI M., CAPACCIOLI M., COVONE G. and PAOLILLO M.
Abstract (from CDS):
---------------------------------------------------------------------------— SN 2012 UT R.A. (2000.0) Decl. Mag. Offset ---------------------------------------------------------------------------— 2012ez Sep. 8.30 3 35 16.368 -27 29 49.21 23.2 1".1 E, 0".1 S 2012fa Sep. 14.24 3 34 59.022 -27 51 55.43 23.4 – ---------------------------------------------------------------------------—
A spectrogram of 2012ez, obtained on Sept. 14.28 UT with the ESO Very Large Telescope Antu (+ FORS2; range 370-920 nm, resolution 10 nm), shows the typical features of a normal type-Ia supernova. Adopting a redshift z = 0.348, as measured from a number of narrow lines of the host galaxy, the best fit with the GELATO tool (Harutyuyan et al. 2008, A.Ap. 488, 383) in a library of supernova spectra is with SN 1995al at fourteen days past maximum (Anupama et al. 1997, A.J. 114, 2054). The ejecta expansion velocity, derived from the position of the Si II doublet, is 11300 km/s.
A spectrogram of 2012fa, which is located at the center of a very faint galaxy, was obtained on Sept. 15.27 as above. Cross-correlation with a library of supernova spectra using the Supernova Identification tool (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that the object is very similar to the bright type-Ia supernova 1991T at ten days before maximum (Ruiz- Lapuente et al. 1992, Ap.J. 387, L33) when placed at a redshift, z, of about 0.4. As for SN 1991T at this phase, the Si II doublet is barely visible.
Abstract Copyright: ∼
Journal keyword(s):
Simbad objects: 4
To bookmark this query, right click on this link: simbad:2012CBET.3236....1C and select 'bookmark this link' or equivalent in the popup menu