Asiago spectroscopic classification of two transients.
ATel #12397; L. Tomasella, E. Cappellaro, S. Benetti, M. Turatto (INAF Osservatorio Astronomico di Padova)
on 16 Jan 2019; 09:44 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)
Subjects: Optical, Supernovae
The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of ATLAS19bfd and ASASSN-19av. The targets were supplied by the ATLAS survey, see Tonry et al. (2011, PASP, 123, 58) and Tonry et al. (ATel #8680) and the All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014, ApJ, 788, 48).
The observations were performed with the Asiago 1.82m Copernico Telescope (+AFOSC; range 340-820 nm; resolution 1.4 nm).
Survey name | IAU name | Host galaxy | Disc. Date (UT) | Obs. Date (UT) | redshift | type | phase | notes
ATLAS19bfd | SN2019rx | 2MASX J05220008-0711330 | 2019-01-13.37 | 2019-01-15.90 | 0.036882 | Ia | -7 days | 1
ASASSN-19av | SN2019rz | UGC 3554 | 2019-01-14.41 | 2019-01-15.98 | 0.018853 | IIn | +4 days | 2
(1) Noisy spectrum consistent with those of Type Ia SNe about one week before maximum, The redshift is from Jones, D.H. et al. 2009, 6dF Galaxy Survey Data Release 3 (via NED)
(2) The spectrum is dominated by a broad HeII 468.6 nm emission, while the strong Balmer lines are unresolved and likely contaminated by the host galaxy lines. The spectral features including the continuum are similar to those of SN 1998S few days after explosion, after allowing for a substantial reddening which is consistent with the presence of a strong NaID Galactic absorption (EW~0.6 nm). The redshift is from Theureau et al. 1998 A&AS, 130, 333 (via NED)
The classification was performed using the GELATO (Harutyunyan et
al. 2008, A&A, 488, 383)
and SNID (Blondin and Tonry 2007, ApJ,
666, 1024) tools.
The Asiago classification spectra are posted at the website http://sngroup.oapd.inaf.it.
