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PESSTO spectroscopic classification of optical transients

ATel #4892; Lukasz Wyrzykowski, Nadia Blagorodnova (IoA, Cambridge), Matt Nicholl (Queen's University Belfast), Cosimo Inserra, Joe Polshaw, Morgan Fraser (Queen's University Belfast), S. Benetti, A. Pastorello, (INAF - Padova Astronomical Observatory), S. Valenti (LCOGT/UCSB), S. Taubenberger (MPA Garching), S. J. Smartt, K. Smith, D. Young (Queen's University Belfast), M. Sullivan (University of Southampton), A. Gal-Yam, O. Yaron (Weizmann Institute for Science).
on 17 Mar 2013; 15:04 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Cosimo Inserra (c.inserra@qub.ac.uk)

Subjects: Optical, Supernovae

PESSTO, the Public ESO Spectroscopic Survey for Transient Objects (see Valenti et al., ATel #4037; http://www.pessto.org ), reports the following supernova classifications. Targets were supplied by the Catalina Real-time Transient Survey (http://crts.caltech.edu/), the CHASE project and the TOCP page. All observations were performed on the ESO New Technology Telescope at La Silla on 2013 March 16, 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
PSNJ07475117-1844586 | 07:47:51.16 | -18:44:58.5 | 20130218 | CHASE | 17.8 | 0.011 | SN imp | | (1) SSS130312:140859-165709 | 14:08:59.35 | -16:57:08.7 | 20130312 | CRTS | 17.9 | - | Stellar | | PSNJ22154081-4551086 | 22:15:40.81 | -45:51:08.6 | 20130313 | TOCP | 14.7 | 0.006 | Ia | ~30d | (2)

1) SN impostor. The spectrum shows a red continuum with an unresolved Halpha in emission (FWHM velocity < 750 km/s). Other lines are not unequivocally detected.

(2) Good match with several Type Ia at ~30d after maximum light.