RA/DEC (2000)
03:53:49.465 -11:32:57.07
58.4561031 -11.5491864
Type
SN Ia
Redshift
0.129
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-12-15 11:14:54.816
TNS AT
Y
Public
Y
Discovery Mag
20
Filter
L-GOTO
Reporter/s
D. O'Neill, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, R. Starling, B. Gompertz, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025ahef - 2025-12-29 00:00:00 SOAR / Goodman (ZTF)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-3_L
 ▌ATLAS-STH_ATLAS-03_cyan
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌ATLAS-MLO_ATLAS-01_cyan
   
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
22705 2025-12-29 00:00:00 SOAR / Goodman Jonathan Carney (UNC), Igor Andreoni (UNC) Jonathan Carney (UNC) ZTF tns_2025ahef_2025-12-29_00-00-00_SOAR_Goodman_ZTF.ascii Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-3 2025-12-14 11:14:19 - 2025-12-15 11:14:55 2461023.968267 - 2461024.968685 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
539567 2025-12-15 11:14:55 2461024.968685 20 0.16 ABMag L-GOTO GOTO-S_GOTO-3 180
539566 2025-12-14 11:14:19 2461023.968267 20.4 ABMag L-GOTO GOTO-S_GOTO-3 180 [Last non detection]
cyan-ATLAS ATLAS-STH_ATLAS-03 2025-12-17 22:08:49 - 2025-12-17 22:08:49 2461027.42279 - 2461027.42279 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
540252 2025-12-17 22:08:49 2461027.42279 19.48 ABMag cyan-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
r-ZTF P48_ZTF-Cam 2025-12-11 05:34:33 - 2025-12-11 05:34:33 2461020.7323264 - 2461020.7323264 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
540063 2025-12-11 05:34:33 2461020.7323264 20.1103 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2025-12-11 06:33:45 - 2025-12-18 05:05:45 2461020.7734375 - 2461027.7123264 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
540065 2025-12-18 05:05:45 2461027.7123264 19.6883 0.20133 ABMag g-ZTF P48_ZTF-Cam
540064 2025-12-11 06:33:45 2461020.7734375 20.643 0.211352 ABMag g-ZTF P48_ZTF-Cam
cyan-ATLAS ATLAS-MLO_ATLAS-01 2025-12-18 10:37:02 - 2025-12-18 10:37:02 2461027.94238 - 2461027.94238 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
540253 2025-12-18 10:37:02 2461027.94238 19.607 0.195 19.57 ABMag cyan-ATLAS ATLAS-MLO_ATLAS-01 30 Robot
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
281223 2025-12-18 13:46:20 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 03:53:49.442 -11:32:56.85 2025-12-18 10:37:01.632 19.607 cyan-ATLAS PSN ATLAS25pwf ATLAS N
281138 2025-12-18 08:51:52 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 03:53:49.465 -11:32:57.07 2025-12-11 06:33:45.000 20.643 g-ZTF PSN ZTF25aciemqo ZTF N
280923 2025-12-17 11:56:55 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 03:53:49.459 -11:32:57.75 2025-12-15 11:14:54.816 20 L-GOTO Other GOTO25lsc GOTO 2025TNSTR5009....1O N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22704 2025-12-30 17:00:56 Jonathan Carney Jonathan Carney (UNC), Igor Andreoni (UNC), Robert Stein (UMD), Erica Hammerstein (UC Berkeley), Ryan Chornock (UC Berkeley) ZTF SN Ia 0.129 1 ZTF Classification and redshift from SNID 2025TNSCR5233....1C
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
22705 2025-12-29 00:00:00 SOAR / Goodman Jonathan Carney (UNC), Igor Andreoni (UNC) Jonathan Carney (UNC) ZTF tns_2025ahef_2025-12-29_00-00-00_SOAR_Goodman_ZTF.ascii Object

Comments

TNS
System

Thu, 12/18/2025 - 08:51

Object coordinates updated

Object coordinates updated according to AT-report 281138 of Group ZTF
Previous RA, DEC: 03:53:49.459, -11:32:57.75 (58.456079, -11.549376)
Updated RA, DEC: 03:53:49.465, -11:32:57.07 (58.4561031, -11.5491864)