Asiago spectroscopic classification of two transients.
ATel #12073; L. Tomasella, S. Benetti, E. Cappellaro, M. Turatto (INAF - Osservatorio Astronomico di Padova)
on 3 Oct 2018; 07:43 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 ASASSN-18wd, ASASSN-18wq. The targets were supplied by the All Sky Automated Survey for SuperNovae (ASAS-SN, Shappee et al. 2014).
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
ASASSN-18wd | 2018gva | CGCG 286-070 | 2018-09-25.47 | 2018-10-03.00 | 0.021465 | Ia | +10 days | 1
ASASSN-18wq | 2018hay | SDSS J092317.60+422248.7 | 2018-10-2.62 | 2018-10-03.07 | 0.009 | II | +14 days | 2
(1) Noisy spectrum similar to those of several type Ia supernovae about ten days after maximum light. The expansion velocity deduced from the Si-II 635.5nm absorption is about 11700 km/s. Redshift of the host galaxy is from Falco, E. et al, The Updated Zwicky Catalog (UZC), Version of August 2000, based on 1999 PASP 111, 438 (via NED)
(2) Noisy spectrum similar to those of several type II supernovae about two weeks after explosion. FWHM of Halpha emission is about 10700 km/s. The redshift has been deduced from the SN spectral features fitting
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.