Spectroscopic Classifications of Optical Transients with Keck I + LRIS
ATel #12712; J. S. Brown, M. R. Siebert, R. J. Foley (UCSC)
on 1 May 2019; 18:18 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Matthew Siebert (msiebert@ucsc.edu)
Subjects: Optical, Supernovae, Transient
We report the classification of the optical transient AT 2019dtt from spectroscopic observations with the LRIS spectrograph on the Keck I telescope, made on 2019 May 1 UT. The target was supplied by ESA Gaia Photometric Science Alerts Team and DPAC (http://gsaweb.ast.cam.ac.uk/alerts). The classification was performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | IAU Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
Gaia19bls | AT2019dtt | 22:34:37.51 | +00:10:32.56 | 0.016 | II P | +4 | (1)
Notes:
When the redshift is given to 2 decimal places, it is derived from the SN spectrum. Otherwise, the redshift is determined from the host galaxy.
(1) We note the presence of strong Halpha emission and relatively weak absorption. We measure an Halpha velocity of -8,500 km/s.
