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Spectroscopic Classification of Four Type Ia Supernovae and Three AGN

ATel #12052; S. Gomez, P. Blanchard, M. Nicholl, G. Hosseinzadeh, E. Berger (Harvard/CfA)
on 20 Sep 2018; 13:45 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Sebastian Gomez (sgomez@cfa.harvard.edu)

Subjects: Optical, AGN, Supernovae, Transient

We obtained optical spectroscopic observations of 7 transients from the Zwicky Transient Facility (ZTF; Bellm & Kulkarni 2017; ATel #11266), one of which was reported to the Transient Name Server by the Pan-STARRS Survey for Transients (PSST; Huber et al., ATel #7153; http://star.pst.qub.ac.uk/ps1threepi/ ). We used the Blue Channel Spectrograph mounted on the 6.5m MMT Telescope with a spectral coverage of 3400-8400 Angstroms for all observations. The classifications, shown below, were determined by cross-correlating spectra of known supernovae using SNID (Blondin & Tonry, 2007, ApJ, 666, 1024). The redshifts and spectral phase listed below are inferred from the best fitting SNID templates.

 
|     Name     |  RA (J2000) |  DEC (J2000) | Disc. Date | Disc. mag | Redshift | Class | Spectral Phase | Class. date | 
|--------------|-------------|--------------|------------|-----------|----------|-------|----------------|-------------| 
|   AT2018fqj  | 14:23:49.00 | +34:06:10.35 | 2018-08-24 | 19.92 (r) |      0.1 | SN Ia |    ~4 days     | 2018-09-08  | 
| ZTF18ablvime | 00:07:01.25 | +33:10:58.35 | 2018-08-07 | 20.55 (r) |     0.14 | SN Ia |   ~16 days     | 2018-09-08  | 
| ZTF18abmxdhb | 16:45:29.83 | +65:14:20.26 | 2018-08-16 | 20.47 (r) |     0.08 | SN Ia |    ~9 days     | 2018-09-08  | 
| ZTF18abptsco | 17:26:51.42 | +34:14:47.61 | 2018-08-25 | 20.08 (r) |     0.12 | SN Ia |    ~8 days     | 2018-09-08  | 
| ZTF18aaycrnz | 17:15:03.12 | +44:29:52.03 | 2018-07-06 | 19.76 (r) |     0.15 |  AGN  |       --       | 2018-09-08  | 
| ZTF18abhxhwv | 18:27:14.75 | +19:56:18.99 | 2018-07-18 | 19.87 (g) |     0.04 |  AGN  |       --       | 2018-09-08  | 
| ZTF18ablvjom | 23:07:41.18 | +33:33:37.41 | 2018-08-07 | 20.21 (r) |     0.19 |  AGN  |       --       | 2018-09-08  |