DRAFT
2021-04-11 18:30:21
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: P. Pessi (ESO), A. Holas, C. Vogl, S. Taubenberger, G. Csoernyei (MPA Garching), A. Floers (GSI), G. Pignata (UNAB), J. Teffs (Liverpool), M. Dennefeld (IAP), S. Benetti (INAF), D. Perley (LJMU), J. Anderson (ESO), T. Müller Bravo (Southampton), T.-W. Chen (Stockholm), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Birmingham), O. Yaron, E. Zimmerman (Weizmann), D. Young, S. J. Smartt (QUB)
Source Group: ePESSTO+
Abstract:
This report includes classifications of three Type Ia's, three Type II's, and a young blue featureless transient.

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 Pan-STARRS Survey for Transients (Chambers et al. 2016 2016arXiv161205560C), the ATLAS survey (Smith et al. 2020 2020arXiv200309052S), the Zwicky Transient Facility ZTF (Bellm et al. 2019 2019PASP..131a8002B) - data stream processed through the Lasair broker (Smith, Williams, Young et al. 2019 2019RNAAS...3a..26S) and by the ALeRCE broker (Forster et al. 2020 https://arxiv.org/abs/2008.03303), and by the ESA Gaia Photometric Science Alerts Team DPAC.

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2021 April 10, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) and GELATO (Harutyunyan et al. 2008 2008A&A...488..383H).

The classification spectra and additional details can be obtained from http://www.pessto.org (via WISeREP) and the IAU Transient Name Server.

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

Show current TNS values
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Source Phase (days) Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2021iso [ZTF21aatpsky] 11:57:21.464 -20:13:58.62 SN 0.031 WISEA J115721.52-201404.1 0.031 ZTF < 6 Redshift from narrow host galaxy emission lines. From the light curve, we estimate a phase of less than 6 days after explosion. The blue, featureless spectrum together with the photometric information from ZTF suggests this to be a young Type II supernova. However, further follow-up observations are needed for an unambiguous classification. 11:57:21.460 -20:13:58.56 SN II 0.031
TNS 2021ipf [ZTF21aasuazz] 11:37:50.589 -07:13:42.08 SN Ia 0.054 6dF J1137507-071341 ZTF -7 to -4 Phase and redshift from template matching with SNID. 11:37:50.575 -07:13:42.15 SN Ia 0.055735
TNS 2021ify [ZTF21aassamj] 17:26:53.695 +13:10:43.85 SN Ia 0.057 ZTF, ATLAS -7 to -4 Phase and redshift from template matching with SNID. 17:26:53.693 +13:10:43.92 SN Ia 0.056
TNS 2021hiv [ZTF21aaquhqr] 12:49:05.837 -12:12:27.57 SN II 0.023 LCRS B124628.6-115605 0.023 ZTF, Pan-STARRS +11 to +20 Redshift from narrow host galaxy emission lines. From the ZTF light curve, we estimate the epoch to be about 2.5 weeks after the explosion. 12:49:05.843 -12:12:27.61 SN II 0.023
TNS 2021ill [ATLAS21krq] 09:19:45.340 -30:52:40.76 SN Ia 0.056 2MFGC 07241 0.056 ATLAS, Gaia -7 to -4 Redshift from narrow host galaxy emission lines. 09:19:45.340 -30:52:40.76 SN Ia 0.056
TNS 2021ijh [Gaia21brl] 12:13:59.390 -51:48:38.81 SN II 0.037 WISEA J121359.98-514836.1 0.037 Gaia +8 to +10 Redshift from narrow host galaxy emission lines. 12:13:59.390 -51:48:38.81 SN II 0.037
TNS 2021gvv [ZTF21aaqmoof] 17:04:36.004 +14:04:49.47 SN II 0.038 SDSS J170435.94+140449.3 0.038 ZTF, ATLAS > +20 Redshift from narrow host galaxy emission lines. From the ZTF light curve, we estimate the epoch to be 20-25 days after explosion. 17:04:35.997 +14:04:49.37 SN II 0.038

Comments