RA/DEC (2000)
16:25:00.394 +45:03:13.43
246.25164021111 +45.053731255556
Type
SN Ia
Redshift
0.0675
Discovery ReportClassification Report
Reporting Group
ALeRCE
Discovering Data Source
ZTF
Discovery Date
2025-08-21 03:56:55.997
TNS AT
Y
Public
Y
Host Name
SDSS J162500.44+450312.0
Discovery Mag
21.0403
Filter
g-ZTF
Reporter/s
F. Forster, F.E. Bauer, G. Pignata, A. Munoz-Arancibia, A. Mourao, L. Hernandez-Garcia, L. Galbany, J. Silva-Farfan, R. Dastidar, J.P. Brandt, A. Alvarez, G. Cabrera-Vives, R. Carrasco-Davis, P.A. Estevez, B. Gamboa, P. Huijse, H. Larranaga, C. Mansilla, K. Medina, D. Moreno, E. Munoz, E. Pizarro, I. Reyes, P. Sanchez-Saez, D. Rodriguez-Mancini, M. Catelan, S. Eyheramendy, M.J. Graham on behalf of the ALeRCE broker
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025vfa - 2025-10-02 21:09:23 LT / SPRAT (ZTF)z=
 ▌SN_2025vfa - 2025-09-17 04:46:37 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
 ▌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
22148 2025-10-02 21:09:23 LT / SPRAT Jacob Wise, Daniel Perley, K-Ryan Hinds, Zoe McGrath Jacob Wise ZTF tns_2025vfa_2025-10-02_21-09-23.110_LT_SPRAT_ZTF.spec Object
22093 2025-09-17 04:46:37 P60 / SEDM 2700 SEDmRobot ZTF tns_2025vfa_2025-09-17_04-46-36.593753_P60_SEDM_ZTF.ascii Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-08-24 21:20:54 - 2025-08-31 21:35:30 2460912.38951 - 2460919.39965 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
514818 2025-08-31 21:35:30 2460919.39965 18.243 0.059 19.48 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
514817 2025-08-24 21:20:54 2460912.38951 20.16 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 90 Robot [Last non detection]
r-ZTF P48_ZTF-Cam 2025-08-23 03:54:40 - 2025-08-23 03:54:40 2460910.662963 - 2460910.662963 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
511839 2025-08-23 03:54:40 2460910.662963 20.2659 0.230088 20.5164 ABMag r-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF
g-ZTF P48_ZTF-Cam 2025-08-17 04:18:01 - 2025-08-23 05:10:29 2460904.6791782 - 2460910.7156134 5
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
511840 2025-08-23 05:10:29 2460910.7156134 19.996 0.184728 20.4224 ABMag g-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF
511838 2025-08-21 03:56:56 2460908.664537 21.0403 0.404454 20.6555 ABMag g-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF
514930 2025-08-21 03:56:56 2460908.664537 21.0403 0.404454 20.6555 ABMag g-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF, classified by Fink
511837 2025-08-17 04:18:01 2460904.6791782 20.7414 ABMag g-ZTF P48_ZTF-Cam 30 Robot [Last non detection] Data provided by ZTF
514929 2025-08-17 04:18:01 2460904.6791782 20.7414 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
268949 2025-09-01 18:55:32 Fink Julien Peloton, Anais Moller, Emille E. O. Ishida on behalf of the Fink broker Fink ZTF 16:25:00.394 +45:03:13.43 2025-08-21 03:56:55.997 21.0403 g-ZTF PSN ZTF25abkoomo ZTF Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25abkoomo N
268894 2025-09-01 10:22:45 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 16:25:00.409 +45:03:13.14 2025-08-31 21:35:29.760 18.243 wide-ATLAS PSN ATLAS25kvq ATLAS N
267396 2025-08-23 22:12:03 ALeRCE F. Forster, F.E. Bauer, G. Pignata et al. ALeRCE ZTF 16:25:00.386 +45:03:13.60 2025-08-21 03:56:55.997 21.0403 g-ZTF PSN SDSS J162500.44+450312.0 ZTF25abkoomo ZTF SN candidate classified using ALeRCE's stamp classifier (Carrasco-Davis et al. 2021) and the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF25abkoomo 2025TNSTR3330....1F N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22148 2025-10-03 03:31:44 Jacob Wise Jacob Wise (LJMU), Daniel Perley (LJMU), K-Ryan Hinds (LJMU), Zoe McGrath (LJMU) ZTF SN Ia 0.0675 1 1 ZTF Spectrum is well-fit to template spectra from previously classified SN Ia at a redshift of z = 0.0675 ± 0.0025, confirming the previous classification and refining its redshift. Classification performed using Next Generation Superfit (NGSF, Goldwasser et al. 2022). 2025TNSCR3993....1W
Related files
File Comments Last Modified (UT) Modified By
tns_2025vfa_atrep_22148_ZTF.pdf NGSF fits 2025-10-03 03:31:44 Jacob Wise
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
22148 2025-10-02 21:09:23 LT / SPRAT Jacob Wise, Daniel Perley, K-Ryan Hinds, Zoe McGrath Jacob Wise ZTF tns_2025vfa_2025-10-02_21-09-23.110_LT_SPRAT_ZTF.spec Object
22093 2025-09-23 22:51:34 ZTF_Bot1 J. Johansson, A. Mehla, M. Chu, C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF) ZTF SN Ia 0.09 1 ZTF 2025TNSCR3834....1J
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
22093 2025-09-17 04:46:37 P60 / SEDM 2700 SEDmRobot ZTF tns_2025vfa_2025-09-17_04-46-36.593753_P60_SEDM_ZTF.ascii Object

Comments

TNS
System

Mon, 09/01/2025 - 18:55

Object coordinates updated

Object coordinates updated according to AT-report 268949 of Group ZTF
Previous RA, DEC: 16:25:00.386, +45:03:13.60 (246.25160718421, +45.05377673387)
Updated RA, DEC: 16:25:00.394, +45:03:13.43 (246.25164021111, +45.053731255556)