Spectroscopic classification of two type II SNe at Asiago
ATel #7712; S. Benetti, L. Tomasella, E. Cappellaro, N. Elias-Rosa, P. Ochner, A. Pastorello, L. Tartaglia, G. Terreran, M. Turatto (INAF OAPd)
on 25 Jun 2015; 10:36 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Enrico Cappellaro (enrico.cappellaro@oapd.inaf.it)
The Asiago Transient Classification Program (Tomasella et
al. 2014, AN, 335, 841) reports the spectroscopic classification of
PSN J19535968+4956078 in UGC 11494 discovered by P. Campaner (ISSP) on
2015 Jun 12.01
and
ASASSN-15ln (Atel #7670) in UGC 546 discovered by the All Sky
Automated Survey for SuperNovae (ASAS-SN) on 2015 Jun 19.58.
Informations on these transients are also available from the "Bright
Supernova" website (http://www.rochesterastronomy.org/snimages/) and
the CBAT Transient Object Followup Reports
(http://www.cbat.eps.harvard.edu/index.html). The observations
were performed with the Asiago 1.82 m Copernico Telescope (+AFOSC;
range 340-820 nm; resolution 1.4 nm).
Name | Date (UT) | v | Type | Phase | Notes
PSN J19535968+4956078 | 20150624.98 | 7518 | II-P | ~2 weeks | 1
ASASSN-15ln | 20150625.06 | 4501 | II | early | 2
Redshifts of the host galaxies are from NED
(1) The expansion velocity inferred from the position of the Halpha
absorption is about 10500 km/s. Photometric monitoring from the ISSP
collaboration shows that the object has maintained approximately
constant magnitude over a period of about 10 days, suggesting that the
object is a Type II-plateau SN.
(2) Halpha emissione is still very shallow. The expansion
velocity inferred from the position of the
Hbeta absorption is about 11000 km/s.
Classifications were done with GELATO (Harutyunyan et al. 2008,
A&A, 488, 383) and SNID (Blondin and Tonry 2007, ApJ, 666, 1024). The
Asiago classification spectra are posted at the website http://sngroup.oapd.inaf.it.
