[ Previous | Next | ADS ]

FORS2 spectroscopic classification of DECam SN candidates

ATel #6014; J. Anderson (ESO Chile), F. Bufano (UNAB), F. Forster (Center for Mathematical Modelling, CMM), M. Hamuy, S. Gonzalez-Gaitan, L. Galbany, Hanin Kuncarayakti (Departamento de Astronomia, DAS), G. Pignata (UNAB)
on 26 Mar 2014; 17:11 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Joseph Anderson (janderso@eso.org)

Subjects: Optical, Supernovae

We report the spectroscopic classification of 3 SNe discovered by the DECam high cadence transient search (see ATELs #5956, #5949), using FORS2 on the UT1 telescope at Cerro Paranal (through DDT proposal 292.D-042).

 
Name   | RA (J2000)   | Dec (J2000)   | Disc Mag (g) | classification  |  phase  |  redshift | notes 
MARA   | 10:17:33.681 | -2:29:10.085  | 23.2(0.3)    | Ia              | ~max    |  0.2      | (1) 
BEL    | 10 23 12.303 | -06 36 04.261 | 22.4(0.3)    | II              | ~max    |  0.3      | (2) 
GRETA  | 11 11 15.948 | +00 52 59.642 | 21.2(0.3)    | II              | ~max    |  0.085    | (3) 

1) best spectral matches with type Ia supernovae around maximum light. This implies that (consistent with the light-curve) the SN was discovered only a few days (or possibly hrs) post explosion.

2) noisy spectrum, however best matches with type II SNe around maximum light. This implies that (consistent with the light-curve) the SN was discovered only a few days (or possibly hrs) post explosion.

3) candidate previously classified as possible type IIn (ATEL #5957), however narrow lines appear to be related to underlying HII region. When these lines are removed, best spectral matches are with type II SNe around maximum light. This implies that (consistent with the light-curve) the SN was discovered only few days (or possibly hrs) post explosion.