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: ZTF
Asiago spectroscopic classification of SN 2020gpe and AT 2020hhg
The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of SN 2020gpe and AT 2020hhg.
The targets were supplied by the Italian Supernova Search Proget (ISSP, http://italiansupernovae.org) and Zwicky Transient Facility (https://www.ztf.caltech.edu/; Kulkarni et al. 2018, ATel #11266), and reported in the Transient Name Server (TNS).
The observations were obtaineded with the Asiago 1.82m Copernico Telescope (+ AFOSC grism#4; range 340-820 nm; resolution 1.4 nm).
Survey name | IAU name | Host galaxy | Disc. Date (UT) | Obs. Date (UT) | redshift | type | phase | notes AT 2020gpe | SN 2020gpe |N NGC 6214 | 2020-04-12 14:01:00.00 | 2020-04-16 00:57:42.8| 0.025414 | II |young| 1 ZTF20aaurhdm | AT 2020hhg | Galactic | 2020-04-14 10:50:44.16 | 2020-04-16 01:46:28.8 | 0 | CV | - | 2
(1) The spectrum is consistent with those of SN II/IIb few days after explosion. The redshift is from NED .
(2) The spectrum shows a strong blue continuum and a weak Halpha emission core which is surrounded by broad absorption troughs. Higher Balmer lines, as well as He I features, are in pure absorption.
The classification was performed using the GELATO (Harutyunyan et
al. 2008, A&A, 488, 383)
and SNID (Blondin and Tonry 2007, ApJ, 666, 1024) tools.
The Asiago classification spectra are posted at the website http://sngroup.oapd.inaf.it.