[ Previous | Next | ADS ]

PESSTO spectroscopic classification of optical transients

ATel #10105; F. Taddia, C. Barbarino, A. Nyholm, C. Fremling, J. Sollerman (OKC), M. T. Botticella (INAF-Capodimonte), M. Fraser (UCD), C. Inserra, E. Kankare, K. Maguire, S. J. Smartt, K. W. Smith, D. Wright, D. Young (QUB), M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron, G. Leloudas, I. Manulis, S. Schulze (Weizmann), K. C. Chambers, H. Flewelling, M. Huber, T. Lowe. E. Magnier, A. Schulz, C. Waters, R. J. Wainscoat, M. Wilman (IfA, Univ. Hawaii)
on 21 Feb 2017; 13:44 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Francesco Taddia (ftadd@astro.su.se)

Subjects: Optical, AGN, Supernovae, Transient

Referred to by ATel #: 10177

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 Pan-STARRS Survey for Transients (see Chambers et al. 2016, arXiv:1612.05560, and http://pswww.ifa.hawaii.edu ). All observations were performed on the ESO New Technology Telescope at La Silla on 2017 February 19, 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 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 
PS17bcv     | SN2017bbx | 09 16 27.70| +03 35 25.2 |  20170218  |  PS1   |   19.9   | 0.104  | IIn         | ?           | (1) 
PS17bda     | SN2017bbw | 09 30 36.08| +11 29 53.6 |  20170218  |  PS1   |   19.4   | 0.090  | Ia          | -3 to +3 d  | (2)  
PS17bdt     | SN2017bbz | 10 17 28.88| +22 24 57.5 |  20170218  |  PS1   |   20.3   | 0.048  | II          | +12 d       | (3) 
PS17bdv     | SN2017bby | 10 21 15.88| +23 38 53.2 |  20120218  |  PS1   |   20.4   | 0.14   | Ia          | +8 to +10 d | (4) 
PS17bel     | SN2017bcb | 10 50 34.64| +30 25 30.7 |  20120218  |  PS1   |   20.0   | 0.116  | Ia          | +4 to +7 d  | (5) 
PS17beo     | SN2017bca | 10 53 24.68| +28 51 27.1 |  20120218  |  PS1   |   19.6   | 0.217  | IIn         | +28 d       | (6) 
PS17bgn     | SN2017bcc | 11 31 52.98| +29 59 45.1 |  20120218  |  PS1   |   18.3   | 0.148  | SLSN II/AGN | +72 d?      | (7) 

(1) Narrow Halpha and Hbeta in emission. Offset from the host-galaxy center.

(2) Best SNID matches to several 1991T-like SNe Ia before and around maximum. Redshift from SDSS.

(3) Best SNID fit to SN 2004et at +12 d. Other good fits with SNe II at +0 d and +20 d. Redshift from SDSS.

(4) Best SNID match with normal SN Ia 2002dj at +9 d. Several other good matches with normal SNe Ia at similar age.

(5) Best SNID match with several normal SNe Ia at +4 to +7 d. Redshift from SDSS.

(6) Good GELATO match to SN IIn 2010jl at +28 d. Absolute magnitude -20.2 mag.

(7) Broad double-peaked Halpha and Hbeta. Given the possible late phase and the absolute magnitude of -20.8 mag, if this is a SN then it belongs to the SLSN II type. However, we note that the transient is nuclear and Brescia et al. (2015) suggested the host might have an AGN. Redshift and phase are based on the best SNID match to SN IIL 1979C.