SN2015af in NGC 6801 - 2015 08 09


SN2015af (PSN J19273770+5422340) discovered by Paolo Campaner on behalf of Italian Supernovae Search Project, near the galaxy NGC 6801.

, CBAT TOCP discovered 2015/08/09.024 by Paolo Campaner (ISSP)
Found in NGC 6801 at R.A. = 19h27m37s.70, Decl. = +54°22'34".0
Located 17" east and 12" north of the center of NGC 6801.

Mag 19.1:8/12 (18.4:8/9), Type II (z=0.0145) (References: ATEL 7902; SN 2011df)

See also attached image and classification ATEL.



Asiago spectroscopic classification of two supernovae

ATel #7902; G. Terreran, S. Benetti, E. Cappellaro, N. Elias-Rosa, P. Ochner, A. Pastorello, L. Tartaglia, L. Tomasella, M. Turatto (INAF OAPd)
on 11 Aug 2015; 09:52 UT
Credential Certification: Lina Tomasella ( This e-mail address is being protected from spambots. You need JavaScript enabled to view it )

Subjects: Optical, Supernovae

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic classification of PSN J19273770+5422340 in the galaxy NGC 6801 and PSN J00422186+2938415 in the galaxy IC 43, both discovered by Paolo Campaner (ISSP). Informations on these transients are also available from the "Bright Supernova" website (, The ATel, and the CBAT Transient Object Followup Reports ( The observations were performed with the Asiago 1.82 m Copernico Telescope (+AFOSC; range 340-820 nm; resolution 1.4 nm).

Name                         | Discovery      | z       |   Type   | Phase      | Notes  
PSN J19273770+5422340        | 2015-08-09.024 | 0.0145  |    II    |   +10d     | (1)       
PSN J00422186+2938415        | 2015-08-06.092 | 0.0162  |    Ic    | +2-3 months| (2)  

(1) Best match with normal Type-II SNe around 10 days after maximum light, adopting a redshift z=0.014547 (Springob et al. 2005, ApJS, 160, 149) for the host galaxy NGC 6801. A narrow Halpha component, superposed on the broad Halpha attributed to the SN, probably arises from an H II region close to the location of the SN. The expansion velocity of the ejected material, as inferred from the position of the broad absorption of Halpha, is about 9000 km/s.

(2) The redshift of the host galaxy (IC 43) is from Huchra et al. 1999, ApJS, 121, 287.

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