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PESSTO spectroscopic classification of optical transients

ATel #10148; F. Taddia, A. Nyholm, C. Barbarino, C. Fremling, J. Sollerman (OKC), J. Anderson (ESO), L. Galbany (Pitt), C. Inserra, E. Kankare, K. Maguire, S. J. Smartt, K. W. Smith, D. Wright, D. Young (QUB), M. Sullivan (Southampton), S. Valenti (UC Davis), I. Manulis, O. Yaron (Weizmann), K. C. Chambers, L. Denneau, H. Flewelling, A. Heinze, M. Huber, T. Lowe. E. Magnier, A. Schulz, B. Stalder, J. Tonry, C. Waters, R. J. Wainscoat, H. Weiland, M. Wilman (IfA, Univ. Hawaii), A. Rest (STScI)
on 7 Mar 2017; 18:54 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Francesco Taddia (ftadd@astro.su.se)

Subjects: Optical, Supernovae, Transient

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. The targets were supplied by the ESA Gaia Photometric Science Alerts Team and DPAC (http://gsaweb.ast.cam.ac.uk/alerts), by the ATLAS survey, see Tonry et al. (2011, PASP, 123, 58) and Tonry et al. (ATel #8680), and by the Pan-STARRS Survey for Transients (see Chambers et al. 2016, arXiv:1612.05560, and http://pswww.ifa.hawaii.edu ). The observations were performed on the ESO New Technology Telescope at La Silla on 2017 March 6, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). The classifications were done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) and GELATO (Harutyunyan et al., 2008, A&A, 488, 383). The classification spectra and additional details can be obtained from http://www.pessto.org (via WISeREP) and the IAU Transient Name Server.

 
Survey Name                   | IAU Name  | RA (J2000)  | Dec (J2000) | Disc. Date | Source  | Disc Mag |  z        | Type        | Phase       | Notes 
Gaia17aks                     | SN2017aym | 14 37 41.78 | +02 17 08.4 |  20170113  |  Gaia   |   18.7   |  0.005847 | SN IIP      | +90d        | (1) 
ATLAS17bkb                    | SN2017byj | 15 20 07.83 | +11 52 37.5 |  20170304  |  ATLAS  |   18.2   |  0.075516 | SN Ia       | +4d         | (2) 
ATLAS17bja                    | SN2017byz | 11 23 30.80 | -08 39 11.5 |  20170304  |  ATLAS  |   16.5   |  0.012285 | SN II       | -3d         | (3) 
PS17bod                       | SN2017blk | 11 21 39.83 | -05 38 15.8 |  20170225  |  PS1    |   18.7   |  0.055486 | SN Ia       | +12d        | (4) 
Gaia17aoe                     | AT2017bxs | 11 00 16.06 | -56 34 25.1 |  20170228  |  Gaia   |   16.5   |  0        | Stellar     | -           | (5) 

(1) Reddened spectrum of an old (at least +60d) SN IIP. Good match to SN 1999em at +90d. Redshift from NED.

(2) Best SNID fit to the normal SN Ia 1994ae at +4 d. Many other good fits to normal SNe Ia around and after peak. Redshift from NED.

(3) Best SNID fit to the SN IIP 2004et at -3 d. Other good fits to young SNe II at pre-maximum phases. Redshift from NED.

(4) Best SNID fits to a few SNe Ia at +12d. Redshift from NED.

(5) Blue continuum with Hbeta, Hgamma, Hdelta in absorption at z=0.