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Spectroscopic Classification of Two Supernovae

ATel #11255; S. Gomez, P. Blanchard, M. Nicholl, E. Berger (Harvard/CfA)
on 4 Feb 2018; 20:35 UT
Credential Certification: Sebastian Gomez (sgomez@cfa.harvard.edu)

Subjects: Optical, Supernovae, Transient

We obtained optical spectroscopic observations of 2 transients reported to the Transient Name Server by the ATLAS survey (Tonry et al. 2011, PASP, 123, 58; Tonry et al., ATel #8680) and the Pan-STARRS Survey for Transients (PSST; Huber et al., ATel #7153; http://star.pst.qub.ac.uk/ps1threepi/ ). We performed our observations with the Blue Channel Spectrograph mounted on the 6.5m MMT Telescope (3400-8400 angstroms). The classifications, shown below, were performed using SNID (Blondin & Tonry, 2007, ApJ, 666, 1024). The redshifts listed below are inferred from the best fitting SNID templates.

Name | RA (J2000) | DEC (J2000) | Obs. Date | Disc. Date | Disc. Source | Disc. Mag | z | Type | Sp. Phase
AT2018fk | 11:39:42.54 | -12:41:33.15 | 20180126 | 20180110 | PSST | 19.45 (i) | 0.082 | Ia | ~max
AT2018jj | 00:58:28.10 | -05:52:32.97 | 20180126 | 20180114 | ATLAS | 19.123 (orange)| 0.038 | Ia | ~max