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 (firstname.lastname@example.org)
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.