ePESSTO spectroscopic classification of optical transients
ATel #11554; K. E. Heintz (Univ. Iceland, DAWN), D. Malesani (DAWN, DARK), P. D'Avanzo (INAF-OAB), G. Leloudas (DARK), C. Barbarino (Stockholm), T. W. Chen (MPE), Z. Kostrzewa-Rutkowska (SRON/RU), C. Inserra (Southampton), E. Kankare, K. Maguire, S. J. Smartt (QUB), O. Yaron (Weizmann), D. Young (QUB), J. Tonry, L. Denneau., A. Heinze, H. Weiland (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), K. W. Smith, O. McBrien, D. R. Young (QUB), D. E. Wright (Univ. of Minnesota), L. Wyrzykowski (Warsaw Observatory, Poland)
on 20 Apr 2018; 21:15 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 ATLAS survey, see Tonry et al. (2011, PASP, 123, 58) and Tonry et al. (ATel #8680), the OGLE-IV Real-time Transient Search (Wyrzykowski et al., 2014 arxiv:1409.1095; http://ogle.astrouw.edu.pl/ ), the ESA Gaia Photometric Science Alerts Team and DPAC (http://gsaweb.ast.cam.ac.uk/alerts), and 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 ). All observations were performed on the ESO New Technology Telescope at La Silla on 2018 April 19 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
ATLAS18mys | SN 2018aqg | 05 15 43.09 | -19 25 21.7 | 2018 03 16 | ATLAS | 19.4 | 0.12 | Ia |+1-2 weeks| (1)
OGLE18auq | SN 2018auq | 05 16 46.13 | -62 15 36.6 | 2018 04 06 | OGLE | 21.9 | 0.10 | Ia |at max |
Gaia18azq | SN 2018awi | 10 20 10.90 | -07 50 48.6 | 2018 04 12 | Gaia | 19.5 | 0.052 | Ia-91bg|+4 to +7 | (2)
ATLAS18mzt | SN 2018aqz | 11 39 05.08 | -38:14:06.3 | 2018 03 26 | ATLAS | 18.4 | 0.03 | Ia |+8 to +10 |
ASASSN-18im | SN 2018avv | 13 51 34.36 | -05:53:23.7 | 2018 04 17 | ASAS-SN | 17.8 | 0.060 | Ia |+8 to +10 | (3)
ATLAS18nfo | SN 2018awe | 14 02 04.15 | -25 39 41.2 | 2018 04 15 | ATLAS | 18.2 | 0.028 | II |+11 to +20| (4)
ATLAS18nch | AT 2018asz | 16 05 40.24 | +15 35 31.3 | 2018 03 30 | ATLAS | 19.0 | 0.041 | galaxy | - | (5)
Gaia18awf | SN 2018ash | 20 42 49.69 | -29:22:38.8 | 2018 04 05 | Gaia | 18.4 | 0.07 | Ia |> +20 |
Gaia18ayh | SN 2018auz | 22 23 38.48 | +04:37:50.3 | 2018 04 12 | Gaia | 18.5 | 0.05 | Ia |+11 to +20|
(1) ATLAS18mys was observed as part of the GREAT survey (Chen et al. ATel #10510), having a black body temperature of T_BB ~ 7250 +/- 1100 K obtained from the photometry taken on April 17, 2018 with griz = 19.68, 19.23, 19.32, 19.97 mag.
(2) The absolute magnitude of this transient is -17.33 mag, indicating that it is subluminous and confirming its typing as 91bg-like. Redshift from host galaxy.
(3) Redshift from host galaxy.
(4) Redshift from host galaxy.
(5) No transient features. Spectrum similar to the host galaxy spectrum in SDSS.
