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Spectroscopic classification of three SNe Ia at Asiago

ATel #7623; L. Tomasella, S. Benetti, E. Cappellaro, N. Elias-Rosa, P. Ochner, A. Pastorello, L. Tartaglia, G. Terreran, M. Turatto (INAF OAPd)
on 12 Jun 2015; 09:15 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Enrico Cappellaro (enrico.cappellaro@oapd.inaf.it)

Subjects: Optical, Supernovae

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic classification of Gaia15agj in FGC 0955 discovered by Gaia satellite on 2015 Jun 03.05 UT (ATel #7615); ASASSN-15kx (ATel #7621) in PGC 068459 discovered by the All Sky Automated Survey for SuperNovae (ASAS-SN) and PSN J14432601+5725412 (= MASTER OT J144326.01+572541.2) discovered by MASTER-Kislovodsk auto-detection system (ATel #7618). Informations on these transients are also available from the "Bright Supernova" website (http://www.rochesterastronomy.org/snimages/), The Astronomer’s Telegram, 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)    |  z/v      |   Type   | Phase     | Notes 
Gaia15agj                    | 20150611.88  | 0.041     |    Ia    | ~ max     | (1)    
ASASSN-15kx                  | 20150611.96  |  0.018    |  Ia      | ~-7d      | (2) 
MASTER OT J144326.01+572541.2| 20150612.03  | 0.06797   |    Ia    | ~+12d     | (3) 

Redshifts of the host galaxies are from NED

(1) The expansion velocity of the ejected material, as inferred from the position of the absorption of SiII 6355 \AA, is about 11000 km/s.

(2) The expansion velocity of the ejected material, as inferred from the position of the absorption of SiII 6355 \AA, is about 12000 km/s.

(3) The expansion velocity of the ejected material, as inferred from the position of the absorption of SiII 6355 \AA, is about 10200 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.

We acknowledge ESA Gaia (cosmos.esa.int/gaia), and the DPAC Photometric Science Alerts Team (http://gaia.ac.uk/selected-gaia-science-alerts).