DRAFT
2021-04-12 19:16:54
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: P. Pessi (ESO), G. Csoernyei, A. Holas, S. Taubenberger, C. Vogl (MPA Garching), A. Floers (GSI), G. Pignata (UNAB), J. Teffs (Liverpool), M. Dennefeld (IAP), S. Benetti (INAF), 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), K. W. Smith, S. J. Smartt, J. Gillanders, O. McBrien, S. Srivastav, D. R. Young (QUB), J. Tonry, L. Denneau, A. Heinze, H. Weiland, K. C. Chambers, T. de Boer, J. Bulger, J. Fairlamb, M. Huber, C.-C. Lin, T. Lowe, E. Magnier, A. Schultz, R. J. Wainscoat, M. Willman (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), S. Wyatt, D. Sand, R. Amaro, J. Andrews, M. Lundquist (Arizona), S. Valenti (UC Davis), S. Yang (INAF-OAPd), D. E. Reichart, J. B. Haislip, V. Kouprianov (UNC)
Source Group: ePESSTO+
Abstract:
This report includes classifications of 4 SNe Ia, 1 SN IIP, 1 SN IIn, and 2 CVs. The SN IIP and the SN IIn are located in the same host galaxy and exploded within a few weeks of each other.

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), and 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).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2021 April 11, using EFOSC2 and Grism 13 (3985-9315Å, 18Å resolution). Classifications were done using SNID (Blondin & Tonry 2007; 2007ApJ...666.1024B) and GELATO (Harutyunyan et al. 2008; 2008A&A...488..383H) and Superfit (Howell et al. 2005; 2005ApJ...634.1190H).

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 2021jad [ATLAS21lyp] 05:33:22.177 -21:57:06.55 SN Ia 0.0055 NGC 1964 0.005534 ATLAS < -10 SNID finds good matches with SN 1999cp at -14d and SN 1998aq at -10d. Redshift from known host. 05:33:22.170 -21:57:06.70 SN Ia 0.0055
TNS 2021jae [ATLAS21lzi] 08:14:49.220 -22:15:00.64 CV 0 ATLAS Blue continuum with narrow Balmer absorption lines. The Balmer lines are redshifted by ~ 10Å. 08:14:49.220 -22:15:00.64 CV
TNS 2021fpn [ATLAS21iaq] 10:13:47.647 -00:54:55.02 SN IIn 0.0424 SDSS J101346.81-005451.3 0.0424378 ATLAS, ZTF, PS1 > +20 Redshift from known host. GELATO finds a good match with SN 2010jl 40d after discovery. SN 2021fpn is in the same galaxy as SN 2021htf. 10:13:47.640 -00:54:55.08 SN IIn 0.0424
TNS 2021htf [ZTF21aarbhhp] 10:13:46.559 -00:54:30.94 SN IIP 0.0424 SDSS J101346.81-005451.3 0.0424378 ZTF, ATLAS, PS1 > +20 Good matches with SNe II around 3 weeks after explosion. Redshift from known host. SN 2021htf is in the same galaxy as SN 2021fpn. 10:13:46.560 -00:54:30.97 SN IIP 0.0424
TNS 2021igl [ATLAS21kdf] 12:28:45.736 +27:05:51.64 SN Ia 0.115 SDSS J122845.70+270551.1 0.11538 ATLAS, ZTF at max Spectrum with strong host-galaxy contamination and a prominent Na D interstellar line. SNID gives reasonable matches with several SNe Ia between -5 and +5d. Redshift from known host. 12:28:45.736 +27:05:51.64 SN Ia 0.115
TNS 2021inj [ZTF21aaswtok] 16:05:38.994 +03:04:18.87 SN Ia 0.041 UGC 10184 0.041 ZTF at max SNID finds good matches with several normal SNe Ia close to maximum light. Redshift from known host. 16:05:39.008 +03:04:18.97 SN Ia 0.041
TNS 2021gdm [ZTF21aaptmrn] 15:49:33.053 +04:40:15.54 SN Ia 0.112 SDSS J154933.03+044015.6 0.112 ZTF, ATLAS +11 to +20 SNID suggests a phase around 2 weeks past maximum. Redshift measured from host-galaxy emission lines. 15:49:33.053 +04:40:15.54 SN Ia 0.112
Other 13:16:54.180 -45:51:46.00 CV 0 DLT40 Blue continuum. Narrow H alpha emission at z = 0 detected.
TNS 2021hel [ZTF21aaquyjp] 21:05:10.730 +12:49:24.74 ZTF Object not visible in the acquisition image. 21:05:10.730 +12:49:24.74

Comments