SN 2021hen
RA/DEC (2000)
13:07:43.886 +24:48:37.91
196.9328598 +24.8105317
Type
SN I
Redshift
0.021125
Reporting Group
ALeRCE
Discovering Data Source
ZTF
Discovery Date
2021-03-28 08:07:19.004
TNS AT
Y
Public
Y
Host Name
SDSS J130742.82+244838.1
Host Redshift
0.02108621
Discovery Mag
18.7906
Filter
r-ZTF
Reporter/s
F. Forster, F.E. Bauer, G. Pignata, A. Munoz-Arancibia, L. Hernandez-Garcia, L. Galbany, E. Camacho, J. Silva-Farfan, A. Mourao, J. Arredondo, G. Cabrera-Vives, R. Carrasco-Davis, P.A. Estevez, P. Huijse, E. Reyes, I. Reyes, P. Sanchez-Saez, C. Valenzuela, E. Castillo, D. Ruz-Mieres, D. Rodriguez-Mancini, M. Catelan, S. Eyheramendy, M.J. Graham on behalf of the ALeRCE broker

Spectra

 SN_2021hen - 2021-03-30 13:01:37 FTN / FLOYDS-N (Global SN Project)z=
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Show Tellurics 
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)
Spectra
SelectIDObs-date (UT)Tel / InstExp-TimeObserver/sReducer/sGroupSpectrum ascii fileSpectrum fits fileSpec. TypeAssoc. GroupsEnd prop. periodRemarks
92592021-03-30 13:01:37FTN / FLOYDS-N3600Las Cumbres ObservatoryCraig PellegrinoGlobal SN Project tns_2021hen_2021-03-30_13-01-37_FTN_FLOYDS-N_Global_SN_Project.asciiObjectGlobal SN Project
Light Curves
FilterTel / InstObs-date rangePhotometry
orange-ATLASATLAS1_ACAM12021-03-26 09:48:58 - 2021-03-30 11:32:382
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
2015982021-03-30 11:32:3818.6910.17218.81ABMagorange-ATLASATLAS1_ACAM130Robot
2015972021-03-26 09:48:5817.17ABMagorange-ATLASATLAS1_ACAM130Robot[Last non detection]
g-ZTFP48_ZTF-Cam2021-03-24 07:18:50 - 2021-03-24 07:18:501
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
2010402021-03-24 07:18:5019.4363ABMagg-ZTFP48_ZTF-Cam30Robot[Last non detection] Data provided by ZTF
r-ZTFP48_ZTF-Cam2021-03-28 08:07:19 - 2021-03-28 08:07:191
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
2010412021-03-28 08:07:1918.79060.1830219.0699ABMagr-ZTFP48_ZTF-Cam30RobotData provided by ZTF
AT Reports
IDTime received (UT)SenderReporter/sReportting groupDisc. Data SourceRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
1044892021-03-31 09:09:33ATLAS_Bot1J. Tonry, L. Denneau, A. Heinze, H. Weiland (IfA, University of Hawaii), B. Stalder (LSST), A. Rest (STScI), C. Stubbs (Harvard University), K. W. Smith, S. J. Smartt, D. R. Young, S. Srivastav, O. McBrien, M. Fulton, J. Gillanders, C. Webb (Queen's University Belfast), T.-W. Chen (MPE), D. E. Wright (University of Minnesota), J. Anderson (ESO)ATLASATLAS13:07:43.908+24:48:37.902021-03-30 11:32:38.40018.691orange-ATLASPSNATLAS21jgyATLAS
1040722021-03-28 19:19:51ALeRCEF. Forster, F.E. Bauer, G. Pignata, A. Munoz-Arancibia, L. Hernandez-Garcia, L. Galbany, E. Camacho, J. Silva-Farfan, A. Mourao, J. Arredondo, G. Cabrera-Vives, R. Carrasco-Davis, P.A. Estevez, P. Huijse, E. Reyes, I. Reyes, P. Sanchez-Saez, C. Valenzuela, E. Castillo, D. Ruz-Mieres, D. Rodriguez-Mancini, M. Catelan, S. Eyheramendy, M.J. Graham on behalf of the ALeRCE brokerALeRCEZTF13:07:43.886+24:48:37.912021-03-28 08:07:19.00418.7906r-ZTFPSNZTF21aaqwfqeZTFEarly SN candidate (r-rise > 0.22+-0.02 mag/day) classified using ALeRCE's stamp classifier - see http://arxiv.org/abs/2008.03309 - and the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF21aaqwfqe
Classification Reports
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarksADS Bibcode
92492021-03-30 23:04:18cpellegrinoCraig Pellegrino, Jamison Burke, Daichi Hiramatsu, D. Andrew Howell, Curtis McCully, Estefania Padilla GonzalezGlobal SN ProjectSN I0.021125Global SN ProjectUsing Superfit (Howell et al. 2005, ApJ, 634, 1190) and SNID (Blondin & Tonry 2007, ApJ, 666, 1024), we find best fits to several Type I SNe, including Type Ia SN 1999ee and Type Ib SN 1998dt, around maximum. The SN is closest to NGC 4979 (z = 0.021125, 1991RC3.9.C...0000d; value from NED). Assuming this redshift, we measure Ca II ejecta velocities of approximately 15,000 km/s. If the object is a Type Ia SN, the Si II 6355 line is weak and at a velocity of 10,000 km/s. On the other hand, assuming it is a Type Ib SN, we measure He velocities greater than 15,000 km/s. Given the ambiguous nature of this object, further followup is encouraged.2021TNSCR.963....1P