[ Previous | Next | ADS ]

Asiago spectroscopic classification of bright SNe in M61 and in PGC 024396

ATel #6648; P. Ochner, L. Tomasella, S. Benetti, E. Cappellaro, N. Elias-Rosa, A. Pastorello, M. Turatto (INAF Osservatorio Astronomico di Padova)
on 31 Oct 2014; 06:47 UT
Credential Certification: Lina Tomasella (lina.tomasella@oapd.inaf.it)

Subjects: Optical, Supernovae

Referred to by ATel #: 6772

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic classification of two supernovae, the bright SN found in M61 and ASASSN-14jh in PGC 024396.

The observations were performed with the Asiago 1.82 m Copernico Telescope (+AFOSC; range 340-1000 nm; resolution 1.2 nm) and 1.22 m Galileo Telescope (+Boller&Chivens; range 360-790 nm; resolution 0.8 nm).

 
Name                    | Date (UT)    | velocity (km/s) |   Type    |  Phase     | Notes   
PSN J12215757+0428185   | 20141031.20  |       1566      |  Ia-pec   |  ~2w       | (1) 
ASASSN-14jh             | 20141031.13  |       5256      |  II       |  ~10d      | (2) 
 

(1) Heliocentric radial velocity of the host galaxy M61 from Bingelli et al. 1985, AJ 90, 1681 via NED. Distance modulus (Virgo + GA + Shapley) m-M = 30.67[0.15] mag, suggesting an absolute mag M~-17.4. The spectrum shows a blue continuum with relatively weak and narrow Si II 635.5-nm absorption. Fe III lines at 430 and 500 nm are visible, suggesting that the object might be a member of the Type-Iax class of supernovae (Foley et al. 2013, Ap.J. 767, 57)

(2) Heliocentric radial velocity of the host galaxy PGC 024396 from Almeida et al. 2011, ApJ 735, 125 via NED.

Classification was 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.

Padova Asiago SN group