RA/DEC (2000)
14:05:12.760 -33:46:01.92
211.303167 -33.7672
Type
SN Ia
Redshift
0.013
Discovery ReportClassification Report
Related AstroNotes: 2025-349
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-12-29 07:52:58.080
TNS AT
Y
Public
Y
Discovery Mag
18.062
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_2025ajmj - 2025-12-31 16:50:08 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
 ▌BG3_BlackGEM-Cam3_BG-q
 ▌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
22713 2025-12-31 16:50:08 FTS / FLOYDS-S 3600 LCO/GSP Joseph Farah Global SN Project tns_2025ajmj_2025-12-31_16-50-08_FTS_FLOYDS-S_Global_SN_Project.ascii tns_2025ajmj_2025-12-31_16-50-08_FTS_FLOYDS-S_Global_SN_Project.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-08-14 09:18:42 - 2026-01-24 17:48:31 2460901.887991 - 2461065.242022 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
553417 2026-01-24 17:48:31 2461065.242022 14.86 0.01 ABMag L-GOTO GOTO-S_GOTO-4 180
553416 2025-08-14 09:18:42 2460901.887991 19.9 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-12-29 07:52:58 - 2025-12-29 07:52:58 2461038.82845 - 2461038.82845 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
544495 2025-12-29 07:52:58 2461038.82845 18.062 0.14 18.91 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
BG-q-BlackGem BG3_BlackGEM-Cam3 2025-07-09 00:31:44 - 2026-01-01 08:38:39 2460865.522037 - 2461041.8601736 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
546576 2026-01-01 08:38:39 2461041.8601736 16.88 0.03 20.21 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic
546575 2025-07-09 00:31:44 2460865.522037 19.42 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic [Last non detection]
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-12-27 16:02:45 - 2025-12-27 16:02:45 2461037.16858 - 2461037.16858 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
544494 2025-12-27 16:02:45 2461037.16858 17.84 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
288739 2026-01-24 20:25:58 GOTO_bot D. O'Neill,M. Pursiainen,K. Ackley et al. GOTO GOTO 14:05:12.771 -33:46:01.49 2026-01-24 17:48:30.528 14.86 L-GOTO PSN GOTO26zc GOTO N
285260 2026-01-01 12:36:02 BlackGEM_Bot1 P. Groot,H. Tranin,F. Stoppa et al. BlackGEM BlackGEM 14:05:12.760 -33:46:01.92 2026-01-01 08:38:39.000 16.88 BG-q-BlackGem PSN BGEM J140512.76-334601.9 BlackGEM N
283471 2025-12-29 09:30:23 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland (IfA et al. ATLAS ATLAS 14:05:12.775 -33:46:01.99 2025-12-29 07:52:58.080 18.062 orange-ATLAS PSN ATLAS25qko ATLAS 2025TNSTR5204....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
22712 2026-01-02 05:41:04 Joseph Farah Joseph Farah (UCSB/LCO), Moira Andrews, Kathryn Wynn, D. Andrew Howell, Curtis McCully, Jake Ridenbaugh Global SN Project SN Ia 0.013 1 Global SN Project We report the classification of SN 2025ajmj as SN Ia. The spectrum shows a best match to SN Ia at approximately 7 days prior to peak light using SNID (Blondin & Tonry 2007, ApJ, 666, 1024). SNID finds a best-fit redshift of z~0.013. Additional follow-up is encouraged. 2026TNSCR..10....1F
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
22713 2025-12-31 16:50:08 FTS / FLOYDS-S 3600 LCO/GSP Joseph Farah Global SN Project tns_2025ajmj_2025-12-31_16-50-08_FTS_FLOYDS-S_Global_SN_Project.ascii tns_2025ajmj_2025-12-31_16-50-08_FTS_FLOYDS-S_Global_SN_Project.fits Object

Comments

TNS
System

Thu, 01/01/2026 - 12:36

Object coordinates updated

Object coordinates updated according to AT-report 285260 of Group BlackGEM
Previous RA, DEC: 14:05:12.775, -33:46:01.99 (211.30323, -33.76722)
Updated RA, DEC: 14:05:12.760, -33:46:01.92 (211.303167, -33.7672)