AstroNote 2019-107

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2019-10-20 17:06:39
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: P. Charalampopoulos, G. Leloudas (DTU Space), C. R. Angus, L. Izzo (DARK/NBI), D. B. Malesani (DTU Space), T. -W. Chen (MPE), T. Nagao (ESO), G. Pignata (UNAB/MAS), D. Perley (LJMU), J. Anderson (ESO), T. Muller Bravo (Southampton), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Edinburgh), O. Yaron (Weizmann), D. Young (QUB),  I. Manulis (Weizmann) , J. Tonry, L. Denneau, A. Heinze, H. Weiland, H. Flewelling (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), K. W. Smith, S. J. Smartt, O. McBrien, S. Srivastav (QUB)
Source Group: ePESSTO+
This report includes classifications of two Type Ia's, and one unknown transient. Our classifcation for SN2019shq is in agreement with TNS Classification Report No. 5305. AT2018lqi is a slowly evolving object and presents a featureless, blue spectrum. We encourage further follow-up observations.

ePESSTO+, the advanced Public ESO Spectroscopic Survey for Transient Objects (Smartt et al. 2015 2015A&A...579A..40S), reports the following supernova classifications.

Targets were supplied by the ATLAS survey (Tonry et al. 2018 2018PASP..130f4505T), the Zwicky Transient Facility ZTF (Kulkarni 2018 2018ATel11266....1K) - data stream processed through the Lasair broker (Smith, Williams, Young et al. 2019 2019RNAAS...3a..26S), and the All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014 2014ApJ...788...48S).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2019 October 19, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) and Superfit (Howell et al. 2005 2005ApJ...634.1190H).

The classification spectra and additional details can be obtained from (via WISeREP) and the IAU Transient Name Server.

The classified objects are listed in the Related Objects table below.

Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftSourcePhase (days)RemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2019spq [ASASSN-19ze]00:01:18.979-43:18:03.35SN Ia0.036WISEA J000119.11-431803.60.05ATLAS+5Redshift obtained from SN fit.00:01:18.979-43:18:03.35SN Ia0.036
TNS2018lqi [ATLAS19wtf]02:18:21.950-25:54:24.48ALTASObject presents a blue, featureless spectrum02:18:21.952-25:54:24.47
TNS2019shq [ASASSN-19yx]08:44:28.651-31:41:25.98SN Ia0.016ESO 432-IG 0060.016165ASASSN>+20dClassification in agreement with TNS Classification Report No. 530508:44:28.660-31:41:25.62SN Ia0.016