ePESSTO+ spectroscopic classification of optical transients
ATel #12856; C. Frohmaier, E. Swann (ICG; Portsmouth), P. Short, M. Nicholl (Edinburgh), M. Dennefeld (IAP), S. C. Williams (Lancaster), P. Pessi (IALP), A. Pastorello (INAF), J. Anderson (ESO), T. Muller Bravo (Southampton), T.-W. Chen (MPE), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), O. Yaron (Weizmann), D. R. Young (QUB), I. Manulis (Weizmann), J. Tonry, L. Denneau, A. Heinze, H. Weiland (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), K. W. Smith, S. J. Smartt, O. McBrien, S. Srivastav (QUB)
on 9 Jun 2019; 16:43 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Matt Nicholl (mrn@roe.ac.uk)
Subjects: Optical, Supernovae
ePESSTO+, the advanced 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 the ESA Gaia Photometric Science Alerts Team and DPAC (http://gsaweb.ast.cam.ac.uk/alerts), by the Zwicky Transient Facility (https://www.ztf.caltech.edu/; Kulkarni et al. 2018, ATel 11266) data stream processed through the Lasair broker (http://lasair.roe.ac.uk/), by the ATLAS survey, see Tonry et al. (2018, PASP, 130, 064505), and the IAU TNS list (see https://wis-tns.weizmann.ac.il/).
All observations were performed on the ESO New Technology Telescope at La Silla on 2019 June 8, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024), GELATO (Harutyunyan et al., 2008, A&A, 488, 383) and DASH (Muthukrishna et al. 2019, arXiv:1903.02557)
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
Gaia19cdu | SN2019hcc | 21:00:20.92 | -21:20:36.0 | 20190606 | Gaia | 18.8 | 0.044 | SLSN I ? | PreMax | (1)
ATLAS19lzi | SN2019gis | 16:09:42.87 | -04:23:18.0 | 20190529 | ATLAS | 19.3 | 0.027 | Ia | At max |
ATLAS19mbn | SN2019gsg | 21:45:50.73 | +15:06:33.0 | 20190601 | ATLAS | 19.3 | 0.112 | Ia | +8 to +10 |
Gaia19bzw | SN2019gqm | 19:48:09.55 | -24:26:36.6 | 20190520 | Gaia | 18.5 | 0.020 | II | At max |
ZTF19aavyafo | SN2019gth | 15:52:31.26 | -15:19:47.2 | 20190603 | ZTF | 19.4 | 0.010 | SN Ia | At max |
ZTF19aaycomi | SN2019hbb | 23:25:13.04 | +09:27:11.4 | 20190607 | ZTF | 19.2 | 0.03 | Ia | At max |
ATLAS19mfw | AT2019hat | 13:23:05.92 | -42:20:31.4 | 20190607 | ATLAS | 15.6 | | Unclear | | (2)
ATLAS19mee | AT2019gyy | 17:16:39.99 | +11:28:45.7 | 20190605 | ATLAS | 17.7 | 0.0 | Stellar | | (3)
ATLAS19mec | SN2019gyx | 23:56:30.56 | -03:06:08.4 | 20190602 | ATLAS | 17.9 | 0.02 | Ib | +4 to +7 |
ZTF19aaxffum | SN2019gwa | 15:58:41.19 | +11:14:25.0 | 20190604 | ZTF | 19.4 | 0.054 | Ia-91T | -7 | (4)
ATLAS19mco | SN2019gvp | 16:46:35.52 | -31:35:31.2 | 20190603 | ATLAS | 19.4 | 0.015 | Ib | +7 |
BraTS-SON-T2-006 | AT2019gvn | 19:49:06.80 | +10:06:58.7 | 20190602 | BraTS | 14.0 | 0.0 | Stellar | | (5)
ATLAS19mce | AT2019gsp | 22:10:04.25 | +23:28:38.2 | 20190601 | ATLAS | 19.4 | | Unclear | | (6)
ZTF19aavndxo | AT2019fyt | 20:47:51.01 | +10:17:35.3 | 20190525 | ZTF | 19.1 | 0.102 | AGN ? | | (7)
(1) Spectrum shows blue continuum with host emission lines at z=0.0435. At this redshift, a w-shaped absorption feature in the blue matches the O II lines in young SLSNe. The absolute magnitude at discovery is -17.7, faint for that class unless it is a very early detection.
(2) Noisy spectrum showing some blue continuum, no clear classification.
(3) Blue continuum with Balmer absorption at z=0, likely CV.
(4) Also classified by Do et al. (TNS Report No. 4237).
(5) Blue continuum with Balmer absorption at z=0, likely CV. Also classified by Ochner and Pastorello (ATEL #12854).
(6) Blue continuum, no clear features to determine a redshift.
(7) Blue continuum, narrow H and [O III] emission at z=0.102. Coincident with a faint SDSS galaxy.
