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PESSTO spectroscopic classification of optical transients

ATel #10152; C. Barbarino, A. Nyholm, F. Taddia, J. Sollerman (OKC), J. Anderson (ESO), L. Galbany (Pitt), E. Kankare, K. Maguire, S. J. Smartt, K. W. Smith, D. Wright, D. Young (QUB), C. Inserra, 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), A. Moller, B. Tucker, B. Zhang, B. Schmidt (Australian National University)
on 8 Mar 2017; 17:18 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), by the Pan-STARRS Survey for Transients (see Chambers et al. 2016, arXiv:1612.05560, and http://pswww.ifa.hawaii.edu ), and by SkyMapper (Scalzo et al. 2013, ATel #5480). The observations were performed on the ESO New Technology Telescope at La Silla on 2017 March 7, 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 
ATLAS17bjp                    | SN2017bxg | 10 40 34.72 | -02 20 36.6 |  20170224  |  ATLAS     |   18.9   |  0.04     | SN Ia       | +2d         | (1) 
PS17bqz                       | SN2017byv | 10 28 27.71 | +12 42 05.9 |  20170305  |  PS1       |   19.5   |  0.032    | SN II       | -4d         | (2) 
Gaia17aor                     | SN2017bzg | 12 14 16.02 | -38 05 48.0 |  20170302  |  Gaia      |   17.8   |  0.05     | SN Ia       | -3 to +3d   | (3) 
ATLAS17bnl                    | SN2017bzm | 13 15 04.15 | -24 48 05.4 |  20170307  |  ATLAS     |   17.6   |  0.045    | SN IIn      | ?           | (4) 
ATLAS17bid                    | SN2017blh | 10 52 10.55 | -27 47 51.7 |  20170215  |  ATLAS     |   18.7   |  0.0334   | SN II       | -2d         | (5) 
ATLAS17bkt                    | AT2017cak | 15 19 18.86 | +28 13 44.4 |  20170305  |  ATLAS     |   16.4   |  ?        | ?           | ?           | (6) 
SMT17bif                      | SN2017bzt | 13 03 09.70 | -39 25 17.2 |  20170227  |  SkyMapper |   19.3   |  0.11     | SN Ia       | +17d        | (7) 

(1) Best SNID fit to the SN Ia 1996X at +2d. Other good fits to normal SNe Ia around peak.

(2) Best fit to SN IIP 1999em at -4d. Redshift from SDSS.

(3) Several good fits to 1991T-like SNe Ia around peak.

(4) Halpha shows a narrow emission component on top of a broader (3400 km/s) one. A broader component with a narrow emission component on top is also visible in Hgamma and Hbeta. Other narrow emission lines likely from the galaxy are observed, such as [O II] 3727, [O III] 4959 and 5007.

(5) Best SNID fit to SN IIP 1999em at -2d. Redshift from the narrow Halpha emission line.

(6) Blue featureless continuum.

(7) Best fit to normal SN Ia 2005ls at +17d. Several other good fits to SNe Ia post-peak.