J/ApJ/946/31ivo://CDS.VizieR/J/ApJ/946/31doi:10.26093/cds/vizier/ba-xj-zCDSVinko J.Thomas B.P.Wheeler J.C.Ho A.Y.Q.Cooper E.M.Gebhardt K.,Ciardullo R.Farrow D.J.Hill G.J.Jager Z.Kollatschny W.Liu C.,Regos E.Sarneczky K.2026-07-02T11:58:53Z2025-04-08T09:30:22ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frvisible-astronomyspectroscopyredshiftedsupernovaeactive-galactic-nucleiWe have extracted 636 spectra taken at the positions of 583 transient sources from the third data release of the Hobby-Eberly Telescope Dark Energy eXperiment (HETDEX). The transients were discovered by the Zwicky Transient Facility (ZTF) during 2018-2022. The HETDEX spectra provide a potential means to obtain classifications for a large number of objects found by photometric surveys for free. We attempt to explore and classify the spectra by utilizing several template-matching techniques. We have identified two transient sources, ZTF20aatpoos = AT 2020fiz and ZTF19abdkelq, as supernova (SN) candidates. We classify AT 2020fiz as a Type IIP SN observed ~10d after explosion, and we propose ZTF19abdkelq as a likely Type Ia SN caught ~40d after maximum light. ZTF photometry of these two sources are consistent with their classifications as SNe. Beside these two objects, we have confirmed several ZTF transients as variable active galactic nuclei based on their spectral appearance, and determined the host galaxy types of several other ZTF transients.2023ApJ...946...31Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/946/31CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/PASP/110/863 : Stellar Spectral Flux Library: 1150-25000{AA} (Pickles 1998)J/ApJ/659/122 : Improved distances to type Ia supernovae (Jha+, 2007)J/MNRAS/394/2266 : SN 2005cs one-year photometry (Pastorello+, 2009)J/ApJ/895/32 : Zwicky Transient Facility BTS. I. (Fremling+, 2020)J/ApJ/920/122 : Candidate Ly{alpha}-emitting galaxies spectra (Davis+, 2021)J/ApJ/911/108 : Stars of HETDEX. I. RVs & metal-poor stars (Hawkins+, 2021)J/ApJ/916/11 : HETDEX [OIII] emitters. I. Low-z galaxies (Indahl+, 2021)J/ApJ/943/177 : HETDEX Public Source Cat. (V3.2) (Mentuch Cooper+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/946/31https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/946/31http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/946/31https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/946/31https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/946/31http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/946/31GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/946/31/tablea1 (ZTF transients classified via {chi}2-minimization)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/946/31/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/946/31/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/946/31/tablea1?GETtext/xml+votable180.050000true33.36269135-0.8761590750.0055555555555555565/1405 1489 2685-2686 2750 2765 2769 2831 2836 4506 6/1906 5599 5625 5939 5941-5945 5948 5960 5962-5964 5968 5973 5975 5984 9977-9978 9983 10145 10147 10152 10154 10237 10716 10748 10975 10997-10998 11004 11064 11067 11082-11084 11086 11095 11099-11100 11102 11104 11117-11118 11120 11122 11139 11142-11143 11145-11146 11148 11153 11163-11164 11166 11175 11177 11179-11182 11184-11186 11188 11200-11202 11295 11311 11317-11319 11321-11323 11333-11334 11336-11338 11340 11342-11343 11348-11350 11352 11360 11363-11364 11366 11368-11370 11395 11397-11399 11401-11404 11407-11408 11412 11416-11417 11424-11425 11428-11430 11433-11436 11604 11776 11778 15357-15359 16040 16042 17725-17727 17768-17769 17771 17812-17813 17815-17816 17818 17820 17822 17827-17830 17832-17833 17835 17841 17856-17857 18005-18006 18008-18009 18011 18021 18023 18029-18030 18032 18068-18069 18071-18073 18076-18077 18112-18114 18176 18178https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/946/31?format=asciiOpticaldefaultJ/ApJ/946/31/tablea1ZTF transients classified via {chi}2-minimizationSTypeHarvard classes for stars, Hubble-classes for galaxiessrc.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPparameters of the AGN sample ("A"; link to Table a2) or host galaxies ("G"; link to Table A3)meta.ref.urlcharZTFZTF transient name (YYaaaaaaa)meta.id;meta.maincharprimarym_ZTFNumber of HETDEX observations for this ZTF sourcemeta.code.multipintnullableRAJ2000[7/274] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-1.1/66.1] Declination (J2000)degpos.eq.dec;meta.mainMJD-1[58242.2/59636.4] Modified Julian Date of ZTF observation startdtime.epochfloatMJD-2[58272.2/59641.4] Modified Julian Date of ZTF observation stopdtime.epochfloatMJD[57834/59168] Modified Julian Date of HETDEX observationdtime.epochintTypeALeRCe Type (1)src.classcharProb[0.28/1]? ALeRCe probabilitystat.probabilityfloatnullableS/N[-1.2/53.3] Signal-to-noise parameterstat.snr;stat.paramfloatchi2[0.001/3604] Normalized {chi}^2^stat.fit.chi2;arith.ratiodoublezspec[0/0.4] Spectroscopic redshiftsrc.redshiftfloatClass{chi}^2^ classification (2)src.classcharHETDEXDisplay data from HETDEX v3.2 (Mentuch Cooper+ 2023, J/ApJ/943/177) within 3.5"meta.ref.urlintnullableJ/ApJ/946/31/tablea2Parameters of the AGN sampleZTFZTF transient name (YYaaaaaaa)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintS/N[2.5/32.2] Signal-to-noise parameterstat.snr;stat.paramfloatchi2[0.37/11.3] normalized {chi}^2^stat.fit.chi2;arith.ratiofloatzspec[0.13/2.3] Spectroscopic redshiftsrc.redshiftfloatJ/ApJ/946/31/tablea3Parameters of the host galaxies having ALeRCE SN light curve classificationZTFZTF transient name (YYaaaaaaa)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNTypeSupernova typesrc.spTypecharSNProb[0.29/0.6] Supernova probabilitystat.probabilityfloatHostHost Hubble typesrc.morph.typecharS/N[3.12/21.1] Signal-to-noise parameterstat.snr;stat.paramfloatchi2[0.26/13.02] normalized {chi}^2^stat.fit.chi2;arith.ratiofloatzspec[0.026/0.18] Spectroscopic redshiftsrc.redshiftfloat