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.
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 |
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