RA/DEC (2000)
10:00:42.151 +15:16:59.53
150.175629529 +15.2832038024
Type
SN II
Redshift
0.031331
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2025-11-28 10:07:08.002
TNS AT
Y
Public
Y
Discovery Mag
18.1455
Filter
g-ZTF
Reporter/s
Nabeel Rehemtulla (CIERA, NU), Wynn Jacobson-Galán (Caltech), Theophile du Laz (Caltech) on behalf of ZTF

Spectra

 SN_2025afbi - 2025-12-02 05:08:48 LT / SPRAT (ZTF)z=
 SN_2025afbi - 2025-11-29 21:32:04 Lijiang-2.4m / YFOSC (LiONS)z=
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 ATLAS-TDO_ATLAS-05_wide
 PS2_GPC2_w
 GOTO-N_GOTO-1_L
 BG3_BlackGEM-Cam3_BG-q
 BG2_BlackGEM-Cam2_BG-q
 P48_ZTF-Cam_g
 ATLAS-MLO_ATLAS-01_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
22496 2025-12-02 05:08:48 LT / SPRAT Daniel Perley, Jacob Wise, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath, Anna Ho Jacob Wise ZTF tns_2025afbi_2025-12-02_05-08-48.267_LT_SPRAT_ZTF.spec Object
22474 2025-11-29 21:32:04 Lijiang-2.4m / YFOSC Jujia Zhang LiONS tns_2025afbi_2025-11-29_21-32-04.463_Lijiang-2.4m_YFOSC_LiONS.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-11-28 03:25:59 - 2025-11-28 03:25:59 2461007.64304 - 2461007.64304 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
534409 2025-11-28 03:25:59 2461007.64304 18.507 0.083 19.84 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
w-P1 PS2_GPC2 2025-12-15 13:16:49 - 2025-12-15 13:16:49 2461025.05334 - 2461025.05334 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
539482 2025-12-15 13:16:49 2461025.05334 17.87 0.01 22 ABMag w-P1 PS2_GPC2 45 Robot
L-GOTO GOTO-N_GOTO-1 2025-11-27 06:38:17 - 2025-11-29 04:16:19 2461006.776581 - 2461008.678001 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
534797 2025-11-29 04:16:19 2461008.678001 17.84 0.03 ABMag L-GOTO GOTO-N_GOTO-1 180
534796 2025-11-27 06:38:17 2461006.776581 19.9 ABMag L-GOTO GOTO-N_GOTO-1 90 [Last non detection]
BG-q-BlackGem BG3_BlackGEM-Cam3 2025-12-23 06:34:58 - 2025-12-23 06:34:58 2461032.7742824 - 2461032.7742824 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
542095 2025-12-23 06:34:58 2461032.7742824 20.69 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic [Last non detection]
BG-q-BlackGem BG2_BlackGEM-Cam2 2025-12-23 07:51:45 - 2025-12-23 07:51:45 2461032.8276042 - 2461032.8276042 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
542096 2025-12-23 07:51:45 2461032.8276042 18.28 0.05 20.67 ABMag BG-q-BlackGem BG2_BlackGEM-Cam2 60 robotic
g-ZTF P48_ZTF-Cam 2025-11-26 12:09:23 - 2025-11-28 10:07:08 2461006.0065162 - 2461007.9216204 4
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
534407 2025-11-28 10:07:08 2461007.9216204 18.1455 0.0821889 ABMag g-ZTF P48_ZTF-Cam
536152 2025-11-28 10:07:08 2461007.9216204 18.1455 0.082189 20.4824 ABMag g-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF, classified by Fink
534406 2025-11-26 12:09:23 2461006.0065162 20.5468 ABMag g-ZTF P48_ZTF-Cam [Last non detection]
536151 2025-11-26 12:09:23 2461006.0065162 20.1739 ABMag g-ZTF P48_ZTF-Cam 30 Robot [Last non detection] Data provided by ZTF, classified by Fink
orange-ATLAS ATLAS-MLO_ATLAS-01 2025-11-27 14:11:00 - 2025-11-27 14:11:00 2461007.09097 - 2461007.09097 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
534408 2025-11-27 14:11:00 2461007.09097 19.55 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 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
282048 2025-12-23 10:48:02 BlackGEM_Bot1 E. A. Zimmerman (WIS),H. Tranin,F. Stoppa et al. BlackGEM BlackGEM 10:00:42.145 +15:16:59.31 2025-12-23 07:51:45.000 18.28 BG-q-BlackGem PSN BGEM J100042.15+151659.3 BlackGEM N
280879 2025-12-16 22:04:25 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 10:00:42.151 +15:16:59.53 2025-12-15 13:16:48.576 17.87 w-P1 PSN PS25iql Pan-STARRS N
279394 2025-12-05 19:15:48 Fink Julien Peloton,Anais Moller,Emille E. O. Ishida on behalf of the Fink broker et al. Fink ZTF 10:00:42.159 +15:16:59.59 2025-11-28 10:07:08.003 18.1455 g-ZTF PSN ZTF25acffkdr ZTF Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25acffkdr N
278712 2025-11-29 15:22:46 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 10:00:42.167 +15:16:59.61 2025-11-29 04:16:19.200 17.84 L-GOTO Other GOTO25ksu GOTO N
278542 2025-11-28 11:25:31 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland (IfA et al. ATLAS ATLAS 10:00:42.159 +15:16:59.53 2025-11-28 03:25:58.656 18.507 wide-ATLAS PSN ATLAS25pbm ATLAS N
278541 2025-11-28 11:24:30 BTSbot_bot Nabeel Rehemtulla (CIERA,NU),Wynn Jacobson-Galán (Caltech) et al. ZTF ZTF 10:00:42.156 +15:16:59.59 2025-11-28 10:07:08.002 18.1455 g-ZTF PSN ZTF25acffkdr ZTF Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167). 2025TNSTR4751....1R N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22495 2025-12-02 11:20:19 Jacob Wise Jacob Wise (LJMU), Daniel Perley (LJMU), Aleksandra Bochenek (LJMU), Zoe McGrath (LJMU), K-Ryan Hinds (Caltech), Anna Ho (Cornell) ZTF SN II 0.031331 1 ZTF Spectrum is largely featureless, with emerging broad H-alpha. This, combined with the transient's fast rise to peak, confirms the previous classification of 2025afbi as a SN II. Redshift of z = 0.031331 ± 0.000014 from SDSS DR13. We also find a reasonable fit to the SN II 1999em using Next Generation Superfit (NGSF, Goldwasser et al. 2022). 2025TNSCR4813....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
22496 2025-12-02 05:08:48 LT / SPRAT Daniel Perley, Jacob Wise, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath, Anna Ho Jacob Wise ZTF tns_2025afbi_2025-12-02_05-08-48.267_LT_SPRAT_ZTF.spec Object
22473 2025-11-30 12:18:26 Liping Li Liping Li, Luhan Li, Zeyi Wang, Qian Zhai, Bo Wang, Jujia Zhang (YNAO); Xiaofeng Wang(THU) LiONS SN II 0.031 1 LiONS The spectrum obtained by LJT is similar to that of a young SN II with a "ledge" feature around 4700A. 2025TNSCR4773....1L
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
22474 2025-11-29 21:32:04 Lijiang-2.4m / YFOSC Jujia Zhang LiONS tns_2025afbi_2025-11-29_21-32-04.463_Lijiang-2.4m_YFOSC_LiONS.dat Object

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 280879 of Group Pan-STARRS
Previous RA, DEC: 10:00:42.159, +15:16:59.59 (150.1756609375, +15.283220525)
Updated RA, DEC: 10:00:42.151, +15:16:59.53 (150.175629529, +15.2832038024)

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 279394 of Group ZTF
Previous RA, DEC: 10:00:42.156, +15:16:59.59 (150.175649, +15.2832185)
Updated RA, DEC: 10:00:42.159, +15:16:59.59 (150.1756609375, +15.283220525)