ePESSTO spectroscopic classification of optical transients
ATel #11564; D. Malesani (DAWN, DARK), K. E. Heintz (Univ. Iceland, DAWN), G. Leloudas (DARK), P. D'Avanzo (INAF-OAB), C. Barbarino (Stockholm), T. W. Chen (MPE), Z. Kostrzewa-Rutkowska (SRON/RU), E. Congiu (Univ. of Padova), M. Gromadzki (Warsaw), C. Inserra (Southampton), E. Kankare, K. Maguire, S. J. Smartt (QUB), O. Yaron (Weizmann), D. 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, O. McBrien (QUB), D. E. Wright (Univ. of Minnesota), K. C. Chambers, H. Flewelling, M. Huber, T. Lowe, E. Magnier, A. Schultz, C. Waters, R. J. Wainscoat, M. Willman (IfA, Univ. of Hawaii).
on 23 Apr 2018; 17:38 UT
Credential Certification: Paolo D'Avanzo (paolo.davanzo@brera.inaf.it)
Subjects: Optical, Supernovae, Transient
ePESSTO, the extended 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 by the ATLAS survey, see Tonry et al. (2011, PASP, 123, 58) and Tonry et al. (ATel #8680), the ESA Gaia Photometric Science Alerts Team and DPAC (http://gsaweb.ast.cam.ac.uk/alerts), the Pan-STARRS Survey for Transients (see Chambers et al. 2016, arXiv:1612.05560, and http://pswww.ifa.hawaii.edu ), the All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014, ApJ, 788, 48 and http://www.astronomy.ohio-state.edu/~assassin/index.shtml ) and the PMO-Tsinghua Transient Survey (PTSS; http://www.cneost.org/ptss2/index.php ). All observations were performed on the ESO New Technology Telescope at La Silla on 2018 April 22 UT, 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. Unless otherwise noted the redshift is from SN template matching.
Survey Name | IAU Name | RA (J2000) | Dec (J2000) | Disc. Date | Source | Disc Mag.| z | Type | Phase | Notes
ATLAS18mzv | AT 2018aqx | 09 40 53.26 | +31 53 44.1 | 2018 03 28 | ATLAS | 17.9 | | | | (1)
Gaia18azb | SN 2018avw | 06 45 55.85 | -58 40 28.1 | 2018 04 17 | Gaia | 18.8 | 0.06 | Ia | at max |
PS18ou | SN 2018axs | 12 27 06.19 | +07 36 20.9 | 2018 04 13 | Pan-STARRS | 19.6 | 0.13 | Ia |+4 to +7 | (2)
ASASSN-18is | SN 2018awo | 12 16 22.78 | -35 01 04.5 | 2018 04 15 | ASAS-SN | 18.4 | 0.06 | Ia | at max |
| AT 2018avd | 14 02 51.22 | -04 25 17.5 | 2018 04 15 | PTSS | 18.4 | 0.047 | | | (3)
ATLAS18nfr | SN 2018awd | 12 50 28.57 | -22 40 36.1 | 2018 04 15 | ATLAS | 18.5 | 0.045 | Ia-02cx|+1-2 weeks| (4)
Gaia18ayl | SN 2018avc | 22 55 38.35 | -19 38 10.2 | 2018 04 14 | Gaia | 18.5 | 0.052 | Ia |+11 to +20| (4)
(1) Low S/N spectrum; ATLAS18mzv was observed as part of the GREAT survey (Chen et al. ATel #10510), having a black body temperature of T_BB > 6700 +/- 200 K obtained from the photometry taken on April 17, 2018 with griz = 19.07, 18.75, 18.76, 18.7 mag. SDSS host galaxy photo_z = 0.157+/-0.079.
(2) SDSS host galaxy photo_z = 0.167+/-0.059.
(3) We re-observed AT2018avd by increasing the exposure time. We still see a featureless blue continuum (see ATel #11560).
(4) Redshift from host galaxy.