ePESSTO spectroscopic classification of optical transients
ATel #12459; R. Carini, S. Piranomonte (INAF-OAR), A. Fiore, S. Benetti, L. Tomasella (INAF-OAPd), T.-W. Chen (MPE), M. Nicholl (ROE, Edinburgh), S. C. Williams (Univ. Lancaster), C. Inserra (Univ. Cardiff), E. Kankare (Univ. Turku), K. Maguire, S. J. Smartt (QUB), 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, O. McBrien, D. E. Wright (Univ. of Minnesota)
on 31 Jan 2019; 16:30 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)
Subjects: Optical, Supernovae
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 classification. The target was supplied by the ATLAS survey, see Tonry et al. (2011, PASP, 123, 58) and
Tonry et al. (ATel #8680). The observation was performed on the ESO New Technology Telescope
at La Silla on 2019-01-30, using EFOSC2 and Grism 13 (3685-9315, 21.2A resolution).
Classification was done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) and GELATO (Harutyunyan et al.,
2008, A&A, 488, 383). Classification spectrum 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
ATLAS19bwq | SN2019abu | 03 22 08.78 | -00 50 24.2 | 20190125 | ATLAS | 18.36 | 0.036379 | CC | early | (1)
(1) The noisy spectrum consists of a blue continuum (Tbb~9000K) typical of young core collapse supernovae. The spectrum also show few faint, shallow lines with broad P-Cygni profiles. If we tentatively identify the most intense ones with H-beta and He I 587.6nm, an expansion velocity of about 13000 km/s is derived from their minima. The galaxy redshift is from SDSS data release 13, 2016 (via NED), which is consistent with that derived from a narrow H-alpha/[NII] blend seen in the SN spectrum, most probably due to a host galaxy background contamination.
