Spectroscopic Classifications of Optical Transients with the Keck I telescope
ATel #13422; M. R. Siebert, G. Dimitriadis, R. J. Foley (UCSC)
on 27 Jan 2020; 17:52 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Georgios Dimitriadis (gdimitri@ucsc.edu)
Subjects: Optical, Supernovae
We report the following classifications of optical transients from spectroscopic observations with the LRIS spectrograph on the Keck I telescope. Targets were supplied by PSST, YSE (ATel #13330), and ZTF. All observations were made on 2020 Jan 27 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | IAU Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
PS20c | AT2020fc | 10:19:35.36 | +06:19:42.49 | 0.028 | II | post-peak | (1)
ZTF20aaflcny | AT2020zx | 14:43:49.78 | +41:13:43.99 | 0.033 | II | +10 d | (2)
PS20ij | AT2020awu | 11:25:23.53 | +09:59:02.04 | 0.065 | | | (3)
PS20jd | AT2020azh | 12:53:07.02 | -04:03:41.75 | 0.029 | II | post-peak | (4)
PS20jo | AT2020azt | 12:53:42.18 | -04:26:29.36 | 0.15 | Ia | -5 d | (5)
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) Spectrum is similar to a SN II, but with possibly two relatively strong absorption components at -1,000 and -4,300 km/s (as measured by H alpha). At a distance modulus of mu = 35.63, it is currently at M_i ~ -15.2 mag, perhaps consistent with the most luminous LBV outbursts, but more similar to the luminosity of SNe II. (2) We measure an H-alpha velocity of -9,000 km/s. (3) Blue featureless continuum. (4) We measure an H-alpha velocity of -5,500 km/s. (5) Redshift obtained from host galaxy emission lines on the SN spectrum. We measure an Si II 6355 velocity of -10,900 km/s.
