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
The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of AT2019suj and ZTF19aceluqi (supplied by Zwicky Transient Facility ZTF).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|Obs. Date | redsh ZTF19aceluqi | | Galactic CV |2019-10-13|2019-10-22| - ZTF19acftfst |2019suj |SDSS J225151.43+233221.1|2019-10-18|2019-10-22| 0.104
(1) The spectrum shows a blue continuum with narrow Halpha, Hbeta and Hgamma in emission at the rest wavelength. The object is therefore a cataclysmic variable (CV).
(2) Best matches with type Ia SNe around maximum light. The redshift z=0.104 is derived from SNID/GELATO SN template fitting and it is in agreement with the photoZ=$0.107\pm0.0198$ reported in SDSS DR15 for the host galaxy SDSS J225151.43+233221.1. Using this redshift, an expansion velocity of about 10400 km/s is derived from the SiII 635.5 nm minimum.
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.