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Asiago spectroscopic classification of ASASSN-17qp = SN 2017ivv

ATel #11063; P. Ochner, S. Benetti, E. Cappellaro, L. Tomasella, M. Turatto (INAF OAPd)
on 15 Dec 2017; 22:06 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Lina Tomasella (lina.tomasella@oapd.inaf.it)

Subjects: Optical, Supernovae

Referred to by ATel #: 11072

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic classification of ASASSN-17qp = SN 2017ivv, discovered in the nucleus of an anonymous galaxy

The observation was performed with the Asiago 1.82 m Copernico Telescope equipped with AFOSC (range 340-820 nm; resolution 1.4 nm).

Survey Name   | IAI Name      | Discovery date (UT)  | Discovery mag | Observation (UT)    |  Type  | z        | Notes| 
ASASSN-17qp   | SN 2017ivv    |  2017-12-12 00:43:12 | g=14.5        |2017-12-15 17:36:37  |   II   |  0.022   | (1)  |   

(1) The spectrum shows a very blue continuum and is strongly contaminated by narrow emission lines of the Balmer series from the nucleus of the anonymous host galaxy. From the galactic emissions we measure a redshift z~0.022. Removing the host galaxy narrow emissions, a good match is found with very young core-collapse SNe. The expansion velocity, as measured from the shallow and broad Halpha line, is about 14000 km/s. Given the measured redshift and its discovery magnitude, SN 2017ivv seems a very luminous supernova, with an absolute magnitude at discovery brighter than -20 mag (assuming an H0=73 km/s/Mpc)

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.

Padova-Asiago SN group