RA/DEC (2000)
14:15:47.588 -48:05:16.19
213.948283333 -48.0878311111
Type
SN Ia
Redshift
0.012
Discovery ReportClassification Report
Related AstroNotes: 2026-35
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2026-02-14 06:48:22.176
TNS AT
Y
Public
Y
Discovery Mag
18.642
Filter
orange-ATLAS
Reporter/s
J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), M. R. Alarcón, J. Licandro, P. Nichita (IAC), S. J. Smartt, K. W. Smith (Oxford/QUB), D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, C. R. Angus, A. Wilson, A. Aamer, D. Magill, P. J. Broda, A. J. Smith (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle, L. Eastman (Oxford), L. Rhodes (TSI/McGill), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026dez - 2026-02-17 17:35:38 FTS / FLOYDS-S (Global SN Project)z=
▌Show H at z=vexp= km/s
▌Show He at z=vexp= km/s
▌Show He II at z=vexp= km/s
▌Show C II at z=vexp= km/s
▌Show C III at z=vexp= km/s
▌Show C IV at z=vexp= km/s
▌Show N II at z=vexp= km/s
▌Show N III at z=vexp= km/s
▌Show N IV at z=vexp= km/s
▌Show N V 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 O V at z=vexp= km/s
▌Show O VI 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 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)

Light curves

 ▌GOTO-S_GOTO-4_L
 ▌ATLAS-CHL_ATLAS-04_orange
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
Spectra
 ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
23011 2026-02-17 17:35:38 FTS / FLOYDS-S 1800 LCO Kathryn Wynn Global SN Project tns_2026dez_2026-02-17_17-35-38_FTS_FLOYDS-S_Global_SN_Project.ascii Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2026-02-10 16:37:20 - 2026-02-17 16:25:59 2461082.192591 - 2461089.184707 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
559298 2026-02-17 16:25:59 2461089.184707 16.76 0.01 ABMag L-GOTO GOTO-S_GOTO-4 180
559297 2026-02-10 16:37:20 2461082.192591 20 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2026-02-13 07:44:44 - 2026-02-14 06:48:22 2461084.82273 - 2461085.78359 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
558541 2026-02-14 06:48:22 2461085.78359 18.642 0.139 19.07 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
558540 2026-02-13 07:44:44 2461084.82273 19.08 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
AT Reports
ID Time received (UT) Sender Reporter/s Reporting group Disc. Data Source RA DEC Discovery date (UT) Discovery Mag. Filter Related files AT Type Host name Internal name Assoc. Groups End prop. period Remarks ADS Bibcode Unreal Auto classification
291778 2026-02-18 11:46:45 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 14:15:47.572 -48:05:16.48 2026-02-17 16:25:58.944 16.76 L-GOTO Other GOTO26bcg GOTO N
291364 2026-02-15 01:20:47 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 14:15:47.588 -48:05:16.19 2026-02-14 06:48:22.176 18.642 orange-ATLAS PSN ATLAS26bty ATLAS 2026TNSTR.638....1T N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
23010 2026-02-17 23:59:14 Kathryn Wynn Kathryn Wynn (UCSB/LCO), Moira Andrews, Joseph Farah, D. Andrew Howell, Curtis McCully Global SN Project SN Ia 0.012 1 Global SN Project We report the classification of SN 2026dez as SN Ia. The spectrum shows a best match to SN Ia before peak from SNID (Blondin & Tonry 2007, ApJ, 666, 1024). The object is offset from the host galaxy, so the object redshift is found from the SNID best fit of 0.012. Additional follow-up is encouraged. 2026TNSCR.684....1W
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
23011 2026-02-17 17:35:38 FTS / FLOYDS-S 1800 LCO Kathryn Wynn Global SN Project tns_2026dez_2026-02-17_17-35-38_FTS_FLOYDS-S_Global_SN_Project.ascii Object

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