WiFeS classification of 4 supernovae
ATel #7458; M. Childress, B. Tucker, R. Scalzo, F. Yuan, B. Zhang, A. Ruiter, I. Seitenzahl, B. Schmidt (Australian National University)
on 29 Apr 2015; 19:22 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Michael Childress (mjc@mso.anu.edu.au)
Subjects: Optical, Supernovae
We report spectroscopic classification of 4 supernovae with the Wide Field Spectrograph (WiFeS - Dopita et al., 2007, ApSS, 310, 255) on the ANU 2.3m telescope at Siding Spring Observatory, NSW Australia, using the B3000/R3000 gratings (3500-9800 A, 1 A resolution). Discovery and classification information are found in the table below, targets were observed on 2015 Apr 29, and classifications were made with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | RA (J2000) | Dec (J2000) | Disc. Date | Disc Mag | Disc. Source | SNID z | Type | Phase | Match SN | Notes
ASASSN-15ic | 06:14:51.38 | -42:47:56.03 | 20150427 | 16.4 | ASAS-SN | 0.025 | Ia | -1 | SN 2005na | (1)
MASTER OT J074610.09-712224.9 | 07:46:10.09 | -71:22:24.9 | 20150426 | 16.3 | MASTER-NET | 0.019 | Ia | -7 | SN 2007F | (2)
ASASSN-15hs | 15:33:34.31 | -78:07:23.5 | 20150424 | 16.6 | ASAS-SN | 0.009 | IIn | unk | -- | (3)
ASASSN-15hz | 22:29:38.08 | -65:27:56.2 | 20150426 | 17.2 | ASAS-SN | 0.033 | Ia | -3 | SN 2007A | (4)
Notes:
(1) See ATel #7455. Redshift is from supernova alone, no clear host signatures in the spectrum.
(2) See ATel #7451. Redshift from narrow host emission lines yields z=0.0174, consistent with the SN estimate.
(3) See ATel #7444. Redshift from narrow host emission lines yields z=0.0089, which implies an absolute magnitude -16.3 at discovery. Halpha appears slightly broadened, indicating likely interaction and thus IIn classification (though we note this could be a SN impostor). Spectrum is relatively blue, so the SN may still be rather young.
(4) See ATel #7450. Redshift is from supernova alone, no clear host signatures in the spectrum.
