Padova-Asiago Supernova Group
Asiago Classification Program
Gaia14act in SDSS J122021.24+2824   Discovered by: GAIA
Object type   SN   II
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Reference:   ATEL6646  

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic classification of Supernova Gaia14act near SDSS J122021.24+282448.1. The observations were performed with the Asiago 1.82 m Copernico Telescope (+AFOSC; range 340-820 nm; resolution 1.2 nm). Name | Date (UT) | z | Type | Phase | Notes Gaia14act | 20141030.15 | 0.027 | II | ~2-3 months | (1) (1) The redshift z of the host galaxy SDSS J122021.24+282448.1 (2MASX J12202126+2824502) is derived from Sloan Digital Sky Survey Data Release 6 as obtained Sep. 17, 2007 from, via NED. The transient Gaia14act was detected by the Gaia Photometric Science Alerts programme with a magnitude of 18.4 at UT 2014 Oct. 26.25. BP and RP spectra indicated a likely SN. The candidate was recovered at RA= 12:20:22.5, DEC= +28:24:51.4 (J2000), corresponding to an offset with respect to the parent galaxy nucleus of 16'' E 3''.5 N, with magnitude r=19.04[0.12], i=18.66[0.92]. 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 We acknowledge ESA Gaia (, and the DPAC Photometric Science Alerts Team ( (Rixon et al, 2014, ATel #6593).