RA/DEC (2000)
08:56:48.624 +05:03:20.96
134.202599545 +5.05582108717
Type
SN Ia
Redshift
0.076854
Discovery ReportClassification Report
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2025-12-12 11:02:44.001
TNS AT
Y
Public
Y
Discovery Mag
20.084
Filter
r-ZTF
Reporter/s
Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU), Theophile du Laz (Caltech) on behalf of ZTF
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025ahag - 2026-01-15 09:23:21 Lick-3m / KAST (ZTF)z=
 ▌SN_2025ahag - 2026-01-14 06:46:10 P60 / SEDM (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

 ▌ATLAS-TDO_ATLAS-05_wide
 ▌GOTO-S_GOTO-3_L
 ▌PS2_GPC2_w
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
   
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
22810 2026-01-15 09:23:21 Lick-3m / KAST Aleksandra Bochenek (LJMU), R. Michael Rich (UCLA), Christian Tapper (UCLA), Emily Elien (UCLA) Zoë McGrath (LJMU) ZTF tns_2025ahag_2026-01-15_09-23-21_Lick-3m_KAST_ZTF.txt Object
22792 2026-01-14 06:46:10 P60 / SEDM 2700 SEDmRobot ZTF tns_2025ahag_2026-01-14_06-46-10.042658_P60_SEDM_ZTF.ascii Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-12-23 01:01:46 - 2025-12-23 01:01:46 2461032.54289 - 2461032.54289 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
542149 2025-12-23 01:01:46 2461032.54289 18.502 0.176 19.86 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
L-GOTO GOTO-S_GOTO-3 2025-12-12 16:55:55 - 2025-12-14 15:34:30 2461022.205504 - 2461024.148957 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
540017 2025-12-14 15:34:30 2461024.148957 19.65 0.15 ABMag L-GOTO GOTO-S_GOTO-3 180
540016 2025-12-12 16:55:55 2461022.205504 19.9 ABMag L-GOTO GOTO-S_GOTO-3 180 [Last non detection]
w-P1 PS2_GPC2 2025-12-12 13:30:16 - 2025-12-12 13:30:16 2461022.06269 - 2461022.06269 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
545604 2025-12-12 13:30:16 2461022.06269 20.27 0.07 22 ABMag w-P1 PS2_GPC2 45 Robot
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-12-20 07:37:11 - 2025-12-20 07:37:11 2461029.81749 - 2461029.81749 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
542148 2025-12-20 07:37:11 2461029.81749 19.05 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
r-ZTF P48_ZTF-Cam 2025-12-12 11:02:44 - 2025-12-12 11:02:44 2461021.9602315 - 2461021.9602315 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
539129 2025-12-12 11:02:44 2461021.9602315 20.084 0.121436 ABMag r-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2025-12-12 09:01:09 - 2025-12-15 10:31:47 2461021.8757986 - 2461024.9387384 4
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
539130 2025-12-15 10:31:47 2461024.9387384 19.4949 0.130058 ABMag g-ZTF P48_ZTF-Cam
541135 2025-12-13 09:34:32 2461022.8989815 20.1 0.230828 20.2732 ABMag g-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF, classified by Fink
539128 2025-12-12 09:01:09 2461021.8757986 20.1847 ABMag g-ZTF P48_ZTF-Cam [Last non detection]
541134 2025-12-12 09:01:09 2461021.8757986 20.1847 ABMag g-ZTF P48_ZTF-Cam 30 Robot [Last non detection] Data provided by ZTF, classified by Fink
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
284359 2025-12-30 21:42:41 PS1_Bot1 K. C. Chambers, T. de Boer, J. Fairlamb et al. Pan-STARRS Pan-STARRS 08:56:48.624 +05:03:20.96 2025-12-12 13:30:16.416 20.27 w-P1 PSN PS25kxb Pan-STARRS N
282075 2025-12-23 12:55:10 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 08:56:48.619 +05:03:21.23 2025-12-23 01:01:45.696 18.502 wide-ATLAS PSN ATLAS25qdt ATLAS N
281640 2025-12-20 19:17:10 Fink Julien Peloton, Anais Moller, Emille E. O. Ishida on behalf of the Fink broker Fink ZTF 08:56:48.626 +05:03:20.93 2025-12-13 09:34:32.002 20.1 g-ZTF PSN ZTF25achvrzd ZTF Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25achvrzd N
281117 2025-12-18 08:39:57 GOTO_bot A. Kumar, G. Ramsay, K. Ackley et al. GOTO GOTO 08:56:48.588 +05:03:20.64 2025-12-14 15:34:30.144 19.65 L-GOTO Other GOTO25ltr GOTO N
280730 2025-12-15 11:21:16 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 08:56:48.630 +05:03:21.04 2025-12-12 11:02:44.001 20.084 r-ZTF PSN ZTF25achvrzd ZTF 2025TNSTR4992....1S N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22809 2026-01-19 18:33:26 Zoë McGrath Jacob Wise (LJMU), Zoë McGrath (LJMU), Aleksandra Bochenek (LJMU) ZTF SN Ia 0.076854 1 ZTF Confirmation as Ia due to Si II absorption and Fe II lines. Redshift updated to z = 0.076854 ± 0.000009 using SDSS DR13. 2026TNSCR.242....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
22810 2026-01-15 09:23:21 Lick-3m / KAST Aleksandra Bochenek (LJMU), R. Michael Rich (UCLA), Christian Tapper (UCLA), Emily Elien (UCLA) Zoë McGrath (LJMU) ZTF tns_2025ahag_2026-01-15_09-23-21_Lick-3m_KAST_ZTF.txt Object
22791 2026-01-16 16:46:43 ZTF_Bot1 J. Sollerman, J. Castaneda Jaimes, M. Chu, C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF) ZTF SN Ia 0.0768 1 ZTF 2026TNSCR.193....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
22792 2026-01-14 06:46:10 P60 / SEDM 2700 SEDmRobot ZTF tns_2025ahag_2026-01-14_06-46-10.042658_P60_SEDM_ZTF.ascii Object

Comments

TNS
System

Tue, 12/30/2025 - 21:42

Object coordinates updated

Object coordinates updated according to AT-report 284359 of Group Pan-STARRS
Previous RA, DEC: 08:56:48.626, +05:03:20.93 (134.20260752727, +5.0558138818182)
Updated RA, DEC: 08:56:48.624, +05:03:20.96 (134.202599545, +5.05582108717)

TNS
System

Sat, 12/20/2025 - 19:17

Object coordinates updated

Object coordinates updated according to AT-report 281640 of Group ZTF
Previous RA, DEC: 08:56:48.630, +05:03:21.04 (134.2026257, +5.0558447)
Updated RA, DEC: 08:56:48.626, +05:03:20.93 (134.20260752727, +5.0558138818182)