Padova-Asiago Supernova Group
The Asiago Transient Classification Program

Presentation
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
  14:16:32.130 +57:48:28.80 Gaia Ib 0.010 ATEL
   
NGC3395 10:49:50.030 +32:59:00.17 ASASSN galactic 0.0054 ATEL
   
MW 07:18:45.440 +19:44:39.40 MASTER CV 0 ATEL
 
NGC4045 12:02:42.723 +01:59:03.64 ATLAS impostor 0.007 ATEL
   
anonymous 06:40:02.842 +60:03:07.93 ATLAS Ia 0.14 ATEL
fits


2019yxp
2019yxp
Discovered by: Gaia

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of MASTER OT J071845.44+194439.4 (AT2020ae), ASASSN-19aea (AT2019ybw), Gaia19ftw (AT2019yxp)

The targets were supplied by the All Sky Automated Survey for SuperNovae (ASAS-SN, Shappee et al. 2014), by MASTER-IAC auto-detection system (Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) and Gaia satellite.

The observation was 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 
MASTER OT J071845.44+194439.4 | 2020ae   | Galactic  | 2020-01-01 | 2020-01-02 |   | CV | - | 1
ASASSN-19aea| 2019ybw |NGC3395  | 2019-12-27 | 2020-01-02 |  0.0054  | galaxy   |-| 2
Gaia19ftw | 2019yxp | IC995 | 2019-12-27 | 2020-01-02|  0.010 | Ib |post maximum | 3

(1) The Afosc spectrum shows Balmer and HeI absorptions at rest wavelength and a very blue continuum. There is a weak emission core in the Halpha absorption. The object is most likely a Galactic CV.

(2) At the given position there is no stellar transient brighter than g~18.5 mag

(3) Several broad Helium features are clearly detected