Spectroscopic Classification of AT2019np with Faulkes-North/FLOYDS
ATel #12375; C. D. Kilpatrick, R. J. Foley (UCSC)
on 10 Jan 2019; 20:17 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Charles Kilpatrick (cdkilpat@ucsc.edu)
Subjects: Optical, Supernovae, Transient
Referred to by ATel #: 12378
We report spectroscopic observations of AT2019np, discovered by Koichi Itagaki on UT 2019 Jan 9.66 in NGC 3254. The observations were performed using the FLOYDS spectrograph on Faulkes-North on UT 2018 Jan 10.44. Classification was performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
AT2019np | 10:29:21.96 | +29:30:38.40 | 0.00452 | Ia | -15 | (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) Given the rise observed from ZTF and photometry on 2019 Jan 10.44 of m_r = 17 mag, which places the source at -15.5 mag assuming a Tully-Fisher distance to NGC 3254 of 31 Mpc (Tully et al. 2016, AJ, 152, 50), we infer this source is very young. We measure a Si II 6355 velocity of -15,600 km/s. We also note the presence of strong C II 6580 absorption with a velocity of -14,700 km/s. This confirms similar findings in Wu et al. (ATel #12374).
