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Spectroscopic classification of SN2016bfu and SN2016bfv and early detections by ATLAS

ATel #8864; J. Tonry, L. Denneau, B. Stalder, A. Heinze, A. Sherstyuk (IfA, University of Hawaii), A. Rest (STScI), K. W. Smith, S. J. Smartt, C. Inserra (Queen's University Belfast)
on 24 Mar 2016; 14:41 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ken Smith (k.w.smith@qub.ac.uk)

Subjects: Optical, Supernovae, Transient

Further to the reported discovery by Stu Parker and the BOSS team of two active supernovae in IC 2150 (ATel #8851), we report the same transients found independently by the ATLAS survey (see Tonry et al. ATel #8680). Spectra were taken on the UH 2.2m + SNIFS spectrometer on 2016-03-20 (= MJD 57467) and 2016-03-22 (= MJD 57469), and the transients are confirmed to be SNe of the following types (using SNID). Redshifts are from the host galaxy (IC 2150). Magnitudes are in the AB system (c denotes the cyan filter, o the orange filter).

 
Name      | ATLAS Name | RA (J2000)  | Dec (J2000) | Disc. Date | Disc Mag |   z    |  Type     | Phase | Notes 
SN2016bfv | ATLAS16ahv | 05:51:18.05 | -38:18:53.2 |  57457.25  |  17.10 c | 0.0104 | SNII      |  max  |  (1) 
SN2016bfu | ATLAS16ahx | 05:51:15.50 | -38:19:01.6 |  57461.24  |  17.18 c | 0.0104 | SNIa-91bg |  max  |  (2) 

1. Spectrum was taken on 2016-03-20. Phase implies ATLAS first detection was -10d before max.
2. Spectrum was taken on 2016-03-22. Phase implies ATLAS first detection was -8d before max.

The spectra are available on the IAU Transient Name Server at 2016bfv and 2016bfu.