Padova-Asiago Supernova Group
The Asiago Transient Classification Program

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.

Latest classifications
sn galaxy RA DEC discoverer type redshift ref class fits
UGC 04642 08:52:56.32 +42:24:47.02 ASASSN IIn 0.023863 ATEL
2MASS J09360855+0615 09:36:08.70 +06:15:27.72 ASASSN ? 0.008087 ATEL
UGC 3700 07:09:53.50 +54:58:07.46 ASASSN Ia 0.037136 ATEL
SDSS J092317.60+4222 09:23:17.76 +42:22:47.46 ASASSN II 0.009 ATEL
CGCG 286-070 07:51:09.63 +62:05:12.16 ASASSN Ia 0.007 ATEL

2018hfg in UGC 04642
2018hfg in UGC 04642
Discovered by: ASASSN

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of ASASSN-18xk and ASASSN-18xl. The targets were supplied by the All Sky Automated Survey for SuperNovae (ASAS-SN, Shappee et al. 2014).

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
ASASSN-18xk | 2018hfg  |       UGC 04642          |2018-10-09.49    | 2018-10-11.07  | 0.023863 | IIn  | several days after explosion |   1
ASASSN-18xl |2018hfm   |2MASS J09360855+0615258   |2018-10-09.63    | 2018-10-11.15  | 0.008087 |  ?   | ?                            |   2

(1) Spectrum similar to those of several type IIn supernovae (including SN 2009ip) several days after explosion. Redshift of the host galaxy UGC 04642 is from Fisher et al. 1995 (ApJS 100, 69 via NED)

(2) Featureless continuum. A shallow broad absorption is centered at about 572.8 nm which, if identify with He I 587.6 nm, an expansion velocity of about 7500 km/s is derived. Redshift of the host galaxy is from SDSS DR3, 2004 (via NED)