The program started in 2011 with the aim to classify all transients that are accessible from Asiago and are bright enough for our telescope/instrumentation. We use mainly the 1.82m Copernico telescope of Cima Ekar and, if not available, the 1.22m Galileo telescope of the Pennar station. A few cases of transients classified by our group with other facilities (eg. TNG) are included in the database.
Transient classification information and spectra (fits format) are made immediately available at our site. The spectra are semi-automatic reduction with archive calibration data. Please keep this in mind when using them.
For SN classification we compare the output of two automatic SN classification codes: Gelato (Harutyunyan et al. 2008, A&A 488, 383) and SNID (Blondin and Tonry 2007, Ap.J. 666, 1024).
If you use some of the information posted in these pages please make a reference to the paper Tomasella etal. 2014, A.N. 335, 841.
Discovered by: Kunihhiro Shima
The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of Gaia16bzi, AT2016isl. The targets were supplied by the ESA Gaia Photometric Science Alerts Team and DPAC (http://gsaweb.ast.cam.ac.uk/alerts), the Tsinghua-NAOC Transient Survey (TNTS) and by Kunihiro Shima.
The observations were performed with the Asiago 1.82m >Copernico Telescope (+AFOSC; range 340-820 nm; resolution 1.4 nm).
Survey name | IAU name | Host galaxy | Disc. Date (UT) | Obs. Date (UT) | redshift | type | phase | notes Gaia16bzi | SN2016ise | 2MASX J01235332+1139499 | 2016-11-30 | 2016-12-06.74 | 0.056 | ? | -- | 1 AT2016isl | SN2016isl | NGC1488 | 2016-12-06 | 2016-12-07.06 | 0.023 | Ia-91T like | before max | 2
(1) The AFOSC low S/N spectrum shows a blue (T~9300K) featureless continuum, compatible with that of a Core Collapse SN soon after explosion. The redshift z=0.0560 is derived from the position of the host galaxy narrow Halpha emission line.
(2) The AFOSC spectrum is similar to those of several SN1991T-like supernovae about a week before maximum. The expansion velocity deduced from the Si-II 635.5nm absorption is about 10600 km/s assuming a redshift z=0.023359 as reported by Giovanelli and Haynes, 1993 (AJ 105, 1271).