[ Previous | Next | ADS ]

Asiago spectroscopic classification of transients

ATel #10680; L. Tomasella, S. Benetti, E. Cappellaro (INAF-OAPd)
on 30 Aug 2017; 09:43 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)

Subjects: Optical, Supernovae, Transient

Referred to by ATel #: 10681

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic classification of SN 2017giq, discovered by Zhijian Xu et al. in SDSS J235754.69+283007.1, and the observations of AT 2017ghp and AT 2017gio discovered by Torny et al (ATLAS)

The observation was performed with the Asiago 1.82 m Copernico Telescope equipped with AFOSC (range 340-820 nm; resolution 1.4 nm).

 
 
Survey Name   | IAU Name      | Discovery date (UT)  | Discovery mag | Observation (UT)    |  Type  | z        | Notes| 
PTSS-17vkg    | SN 2017giq    |  2017-08-27 15:15:18 |      18.8     |2017-08-29 22:09:09  |  SN Ic |  0.029813| (1)  | 
ATLAS17juy    | AT 2017ghp    |  2017-08-23 14:00:57 |     17.53     |2017-08-29 23:49:52  |    ?   |     ?    | (2)  | 
 

(1) The spectrum is consistent with that of Type Ic SN events around maximum light, at a redshift 0.0298, according to the redshift of the host galaxy SDSS J235754.69+283007.1 (Sloan Digital Sky Survey Data Release 13 as obtained Jan. 31, 2017 from http://www.sdss.org/dr13/data_access/bulk/ );
(2) Featureless, blue continuum. A faint source is visible in archival SDSS release 3 survey at the transient position. This is possibly a Galactic CV;

We also pointed the field of ATLAS17jxi (AT 2017gio ) on 2017-08-29 23:08:23UT, no object brighter than ~22.0 mag (unfiltered) has been seen at the transient position.

Classification were done with GELATO (Harutyunyan et al. 2008, A&A, 488, 383) and SNID (Blondin and Tonry 2007, ApJ, 666, 1024). The Asiago classification spectra are posted at the website http://sngroup.oapd.inaf.it.