SN 2021J
RA/DEC (2000)
12:26:27.011 +31:13:20.55
186.612544421 +31.2223756347
Type
SN Ia
Redshift
0.002388
Related AstroNotes: 2021-3, 2021-5
Reporting Group
ALeRCE
Discovering Data Source
ZTF
Discovery Date
2021-01-01 11:44:04.001
TNS AT
Y
Public
Y
Host Name
NGC 4414
Host Redshift
0.002388
Discovery Mag
17.0899
Filter
g-ZTF
Reporter/s
F. Forster, F.E. Bauer, A. Munoz-Arancibia, G. Pignata, L. Hernandez-Garcia, L. Galbany, G. Pignata, 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_2021J - 2021-01-04 12:28:24 FTN / FLOYDS-N (UCSC)z=
 SN_2021J - 2021-01-04 09:12:09 P60 / SEDM (ZTF)z=
 SN_2021J - 2021-01-04 08:25:59 ESO-NTT / EFOSC2-NTT (ePESSTO+)z=
Show H at z=vexp= km/s
Show He at z=vexp= km/s
Show He II at z=vexp= km/s
Show O at z=vexp= km/s
Show [O I] at z=vexp= km/s
Show O II at z=vexp= km/s
Show [O II] at z=vexp= km/s
Show [O III] at z=vexp= km/s
Show Na at z=vexp= km/s
Show Mg at z=vexp= km/s
Show Mg II at z=vexp= km/s
Show Si II at z=vexp= km/s
Show S II at z=vexp= km/s
Show Ca II at z=vexp= km/s
Show [Ca II] at z=vexp= km/s
Show Fe II at z=vexp= km/s
Show Fe III at z=vexp= km/s
Show Å at z=vexp= km/s
Show Å at z=vexp= km/s
Show Tellurics 
Show Galaxy lines at z=
Show WR-WN at z=vexp= km/s
Show WR-WC/O at z=vexp= km/s
   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
84212021-01-04 12:28:24FTN / FLOYDS-N900M. R. SiebertM. R. SiebertUCSC tns_2021J_2021-01-04_12-28-24_FTN_FLOYDS-N_UCSC.flmObjectUCSC
84942021-01-04 09:12:09P60 / SEDM2160SEDmRobotautoZTF tns_2021J_2021-01-04_09-12-09.452781_P60_SEDM_ZTF.asciiObjectZTF
84252021-01-04 08:25:59ESO-NTT / EFOSC2-NTT300J. Gillanders, K. W. SmithS. SrivastavePESSTO+ tns_2021J_2021-01-04_08-25-59_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2021J_2021-01-04_08-25-59_ESO-NTT_EFOSC2-NTT_ePESSTO+.fitsObjectePESSTO+
Light Curves
FilterTel / InstObs-date rangePhotometry
g-SloanPS1_GPC12021-01-06 15:08:38 - 2021-01-06 15:08:382
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
1845932021-01-06 15:08:3814.22021ABMagg-SloanPS1_GPC120Robot
1856242021-01-06 15:08:3814.22021ABMagg-SloanPS1_GPC120Robot
z-SloanPS1_GPC12021-01-02 16:00:29 - 2021-01-02 16:00:291
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
1864882021-01-02 16:00:2916.540.0620.4ABMagz-SloanPS1_GPC1120Robot
orange-ATLASATLAS1_ACAM12021-01-03 15:01:26 - 2021-01-07 13:56:382
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
1848352021-01-07 13:56:3813.9720.00619.7ABMagorange-ATLASATLAS1_ACAM130Robot
1848342021-01-03 15:01:2619.06ABMagorange-ATLASATLAS1_ACAM130Robot[Last non detection]
g-ZTFP48_ZTF-Cam2020-12-23 12:57:06 - 2021-01-01 11:44:042
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
1830972021-01-01 11:44:0417.08990.075267919.3555ABMagg-ZTFP48_ZTF-Cam30RobotData provided by ZTF
1830962020-12-23 12:57:0618.412ABMagg-ZTFP48_ZTF-Cam30Robot[Last non detection] Data provided by ZTF
AT Reports
IDTime received (UT)SenderReporter/sReportting groupDisc. Data SourceRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
966842021-01-13 23:38:29PS2_Bot1K. 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, University of Hawaii), K. W. Smith, D. R. Young, O. McBrien, J. Gillanders, S. Srivastav, M. Fulton, S. J. Smartt, D. O'Neill, P. Clark, S. Sim (Queen's University Belfast), D. E. Wright (University of Minnesota)Pan-STARRS1Pan-STARRS112:26:27.011+31:13:20.552021-01-02 16:00:28.80016.54z-SloanPSNPS21bwPan-STARRS1
963042021-01-09 23:11:21PS1_Bot1K. 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, University of Hawaii), K. W. Smith, D. R. Young, O. McBrien, J. Gillanders, S. Srivastav, M. Fulton, S. J. Smartt, D. O'Neill, P. Clark, S. Sim (Queen's University Belfast), D. E. Wright (University of Minnesota)Pan-STARRS1Pan-STARRS112:26:27.016+31:13:20.562021-01-06 15:08:38.40014.22g-SloanPSNPS21bwPan-STARRS1
960162021-01-07 21:27:46ATLAS_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 (Queen's University Belfast), T.-W. Chen (MPE), D. E. Wright (University of Minnesota), J. Anderson (ESO)ATLASATLAS12:26:27.016+31:13:20.582021-01-07 13:56:38.40013.972orange-ATLASPSNATLAS21auiATLAS
958822021-01-07 01:27:19YSE_Bot1D. O. Jones (UC Santa Cruz), K. D. French (Carnegie, Illinois), A. Agnello, C. R. Angus, Z. Ansari, N. Arendse, C. Gall, C. Grillo, S. H. Bruun, C. Hede, J. Hjorth, L. Izzo, H. Korhonen, S. Raimundo, D. Kodi Ramanah, A. Sarangi, R. Wojtak, H. Pfister (DARK, U Copenhagen), K. Auchettl (DARK, UC Santa Cruz, U Melbourne), K. C. Chambers, M. E. Huber, E. A. Magnier, T. J. L. de Boer, J. R. Fairlamb, C. C. Lin, R. J. Wainscoat, T. Lowe, M. Willman, J. Bulger, A. S. B. Schultz (IfA, Hawaii), A. Engel, A. Gagliano, G. Narayan, M. Soraisam (Illinois), Q. Wang (JHU), A. Rest (JHU, STScI), S. J. Smartt, K. W. Smith (Queen's University Belfast), K. Alexander, A. Baldeschi, P. Blanchard, D. Coppejans, L. DeMarchi, A. Hajela, W. Jacobson-Galan, R. Margutti, D. Matthews, C. Stauffer, M. Stroh, G. Terreran (Northwestern), M. Drout (U Toronto), D. A. Coulter, G. Dimitriadis, R. J. Foley, T. Hung, C. D. Kilpatrick, C. Rojas-Bravo, M. R. Siebert (UC Santa Cruz), E. Ramirez-Ruiz (UC Santa Cruz, DARK)YSEPan-STARRS112:26:27.015+31:13:20.572021-01-06 15:08:38.40014.22g-SloanPSNPS21bwPan-STARRS1
952592021-01-01 16:43:48ALeRCEF. Forster, F.E. Bauer, A. Munoz-Arancibia, G. Pignata, L. Hernandez-Garcia, L. Galbany, G. Pignata, 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 brokerALeRCEZTF12:26:27.031+31:13:20.592021-01-01 11:44:04.00117.0899g-ZTFPSNZTF21aaabvitZTFEarly SN candidate (g-rise > 0.28+-0.01 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/ZTF21aaabvit
Classification Reports
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarksADS Bibcode
84822021-01-06 23:37:09ZTF_Bot1A. Dahiwale, C. Fremling(Caltech) on behalf of the Zwicky Transient Facility (ZTF)ZTFSN Ia0.002388ZTF2021TNSCR..66....1D
84132021-01-04 18:36:20ePESSTOplus_Bot1J. Gillanders, K. W. Smith, S. Srivastav, I. Irani on behalf of ePESSTO+ePESSTO+SN Ia0.0024ePESSTO+2021TNSCR..35....1G
84092021-01-04 17:53:25msiebertM. R. Siebert, R. J. Foley (UCSC)UCSCSN Ia0.0024UCSCThe spectrum has some host-galaxy contamination, but still has distinct supernova features. In particular, we identify Si II 6355 with a minimum blueshifted by -16,300 km/s. The spectrum is consistent with some very young SNe Ia (e.g., SN 2002bo at -14 days), although with some color mismatch. The continuum is relatively flat (in f_lambda) from 4000-10,000 A, slightly increasing to the blue. There is no obvious Na D absorption in the spectrum, although narrow H alpha and Ca H&K absorption, presumably from the host galaxy, are present. There is therefore no obvious dust extinction from indirect indicators. Assuming a Cepheid distance to NGC 4414 (also the host to SN Ia 1974G and SN IIb 2013df), mu = 31.1 mag (Freedman et al., 2001, ApJ, 553, 47), and Milky Way reddening of A_g = 0.064 mag (Schlafly & Finkbeiner, 2011, ApJ, 737, 103), the current brightness (g = 16.1 mag) corresponds to an absolute magnitude of M_g = -15.1 mag. This luminosity is consistent with a young Type Ia supernova.2021TNSCR..37....1S

Comments

Object coordinates updated according to AT-report 96684 of Group Pan-STARRS1
Previous RA, DEC: 12:26:27.016, +31:13:20.56 (186.612565031, +31.2223782348)
Updated RA, DEC: 12:26:27.011, +31:13:20.55 (186.612544421, 31.2223756347)

Object coordinates updated according to AT-report 96304 of Group Pan-STARRS1
Previous RA, DEC: 12:26:27.015, +31:13:20.57 (186.612561851, +31.2223803353)
Updated RA, DEC: 12:26:27.016, +31:13:20.56 (186.612565031, 31.2223782348)

Object coordinates updated according to AT-report 95882 of Group Pan-STARRS1
Previous RA, DEC: 12:26:27.031, +31:13:20.59 (186.6126273, +31.2223856)
Updated RA, DEC: 12:26:27.015, +31:13:20.57 (186.612561851, 31.2223803353)