Asiago spectroscopic classification of two transients
ATel #12101; V. Nascimbeni, V. Granata (DFA-UniPd), S. Benetti, E. Cappellaro, L. Tomasella, M. Turatto (INAF Osservatorio Astronomico di Padova
on 11 Oct 2018; 08:22 UT
Credential Certification: Lina Tomasella (lina.tomasella@oapd.inaf.it)
Subjects: Optical, Supernovae
The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of ASASSN-18xk and ASASSN-18xl. 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-18xk | 2018hfg | UGC 04642 |2018-10-09.49 | 2018-10-11.07 | 0.023863 | IIn | several days after explosion | 1
ASASSN-18xl |2018hfm |2MASS J09360855+0615258 |2018-10-09.63 | 2018-10-11.15 | 0.008087 | ? | ? | 2
(1) Spectrum similar to those of several type IIn supernovae (including SN 2009ip) several days after explosion. Redshift of the host galaxy UGC 04642 is from Fisher et al. 1995 (ApJS 100, 69 via NED)
(2) Featureless continuum. A shallow broad absorption is centered at about 572.8 nm which, if identify with He I 587.6 nm, an expansion velocity of about 7500 km/s is derived. Redshift of the host galaxy is from SDSS DR3, 2004 (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.
Padova-Asiago SN Group
