PESSTO spectroscopic classification of optical transients

ATel #8495; R. Firth, C. Frohmaier, G. Dimitriadis (Southampton), J. Anderson (ESO), K. Maguire (QUB), I. Manulis (Weizmann), C. Inserra (QUB), E. Kankare (QUB), S. J. Smartt (QUB), K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron (Weizmann), D. Young (QUB)
on 2 Jan 2016; 00:01 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Robert Firth (r.firth@soton.ac.uk)

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PESSTO, the Public ESO Spectroscopic Survey for Transient Objects (see Smartt et al. 2015, A&A, 579, 40 http://www.pessto.org ), reports the following supernova classifications. Targets were supplied by All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014, ApJ, 788, 48 and http://www.astronomy.ohio-state.edu/~assassin/index.shtml ). All observations were performed on the ESO New Technology Telescope at La Silla on 2015 December 31, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) and GELATO (Harutyunyan et al., 2008, A&A, 488, 383). Classification spectra can be obtained from http://www.pessto.org (via WISeREP).

 
Name                      | RA (J2000)  | Dec (J2000) | Disc. Date | Disc. Source | Disc Mag |     z    | Type   | Phase   | Notes
 
ASASSN-15us               | 22:09:09.64 | -47:08:02.4 | 2015-12-25 | ASAS-SN      | 16.1     | 0.005839 | Ia     | at max  | (1) 
ASASSN-15ut               | 00:21:21.09 | -48:38:30.3 | 2015-12-30 | ASAS-SN      | 17.68    | 0.003    | Ia-91T | Unknown | 
ASASSN-15uo               | 01:17:00.0  | -04:56:34.1 | 2015-12-29 | ASAS-SN      | 16.7     | 0.038    | IIn-pec| post-max| (2) 
ASASSN-15uu               | 01:43:56.57 | +17:03:44.4 | 2015-12-29 | ASAS-SN      | 16.7     | 0.02679  | Ia     | at max  | (3) 

(1) Redshift from host
(2) Shows unusually strong He I emission lines and is similar to 2005la, a transitional Ibn/IIn.
(3) Redshift from host