RA/DEC (2000)
21:27:08.611 +33:24:37.89
321.785878 +33.410524
Type
SN Ia
Redshift
0.02
Discovery ReportClassification Report
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2026-05-05 13:48:58.752
TNS AT
Y
Public
Y
Discovery Mag
18.761
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_2026lli - 2026-05-24 05:01:25 LT / SPRAT (OxQUB)z=
 ▌SN_2026lli - 2026-05-22 01:33:00 BL41 / FOSC-E5535 (None)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
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 ▌GOTO-N_GOTO-2_L
 ▌ATLAS-HKO_ATLAS-02_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
23816 2026-05-24 05:01:25 LT / SPRAT 1000 Robotic OxQUB tns_2026lli_2026-05-24_05-01-25.376_LT_SPRAT_OxQUB.txt Object
23802 2026-05-22 01:33:00 BL41 / FOSC-E5535 1800 Claudio Balcon Claudio Balcon None tns_2026lli_2026-05-22_01-33-00_BL41_FOSC-E5535_None.dat tns_2026lli_2026-05-22_01-33-00_BL41_FOSC-E5535_None.fit Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2025-12-04 19:55:47 - 2026-05-17 05:03:36 2461014.330406 - 2461177.710827 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
583211 2026-05-17 05:03:36 2461177.710827 16.16 0.01 ABMag L-GOTO GOTO-N_GOTO-2 180
583210 2025-12-04 19:55:47 2461014.330406 19.1 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
orange-ATLAS ATLAS-HKO_ATLAS-02 2026-05-04 14:26:07 - 2026-05-05 13:48:59 2461165.10147 - 2461166.07568 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
579747 2026-05-05 13:48:59 2461166.07568 18.761 0.165 19 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot
579746 2026-05-04 14:26:07 2461165.10147 18.96 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 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
304059 2026-05-17 09:50:39 GOTO_bot G. Ramsay, D. O'Neill, K. Ackley et al. GOTO GOTO 21:27:08.601 +33:24:37.86 2026-05-17 05:03:35.712 16.16 L-GOTO Other GOTO26eto GOTO N
302417 2026-05-05 22:27:42 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 21:27:08.611 +33:24:37.89 2026-05-05 13:48:58.752 18.761 orange-ATLAS PSN ATLAS26fel ATLAS 2026TNSTR1938....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
23812 2026-05-25 11:29:42 Shubham Srivastav S. Srivastav (Oxford), C. R. Angus, D. Magill, M. Nicholl, X. Sheng, D. R. Young (QUB), S. J. Smartt, K. W. Smith (Oxford/QUB), J. H. Gillanders, H. F. Stevance, F. Stoppa (Oxford), T.-W. Chen (NCU), T. Moore (STScI) OxQUB SN Ia 0.02 1 OxQUB Normal SN Ia, in agreement with previous classification report. SNID-SAGE shows good matches with SNe Ia just past maximum between redshifts of 0.02 and 0.025. 2026TNSCR2280....1S
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
23816 2026-05-24 05:01:25 LT / SPRAT 1000 Robotic OxQUB tns_2026lli_2026-05-24_05-01-25.376_LT_SPRAT_OxQUB.txt Object
23798 2026-05-22 01:56:43 Claudio Balcon Claudio Balcon (Belluno A.O. ISSP) None SN Ia 0.02 1 GELATO Harutyunyan et al., 2008, A&A, 488, 383 (gelato@tng.iac.es) suggests that this spectrum resembles that of a type Ia supernova. The redshift has been deduced from the spectral matching. 2026TNSCR2236....1B
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
23802 2026-05-22 01:33:00 BL41 / FOSC-E5535 1800 Claudio Balcon Claudio Balcon None tns_2026lli_2026-05-22_01-33-00_BL41_FOSC-E5535_None.dat tns_2026lli_2026-05-22_01-33-00_BL41_FOSC-E5535_None.fit Object

Comments