RA/DEC (2000)
02:32:58.156 +42:58:55.14
38.2423177158 +42.9819840711
Type
SLSN-II
Redshift
0.12
Discovery ReportClassification Report
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2025-08-10 10:57:10.998
TNS AT
Y
Public
Y
Discovery Mag
19.5578
Filter
g-ZTF
Reporter/s
Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU), Theophile du Laz (Caltech) on behalf of ZTF
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025tll - 2025-09-04 01:54:11 NOT / ALFOSC (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
 ▌PS2_GPC2_i
 ▌P48_ZTF-Cam_i
 ▌P48_ZTF-Cam_g
 ▌ATLAS-HKO_ATLAS-02_orange
 ▌PS1_GPC1_i
   
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
22020 2025-09-04 01:54:11 NOT / ALFOSC 1800 J. Sollerman, A. Gangopadhyay A. Gangopadhyay ZTF tns_2025tll_2025-09-04_01-54-11_NOT_ALFOSC_ZTF.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-08-16 02:35:01 - 2025-08-16 02:35:01 2460903.60765 - 2460903.60765 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
509732 2025-08-16 02:35:01 2460903.60765 18.36 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot [Last non detection]
i-P1 PS2_GPC2 2025-09-07 11:43:53 - 2025-09-07 11:43:53 2460925.98881 - 2460925.98881 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
544360 2025-09-07 11:43:53 2460925.98881 18.77 0.03 20.7 ABMag i-P1 PS2_GPC2 45 Robot
i-ZTF P48_ZTF-Cam 2025-08-10 08:20:56 - 2025-08-10 08:20:56 2460897.8478704 - 2460897.8478704 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507971 2025-08-10 08:20:56 2460897.8478704 19.1613 ABMag i-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2025-08-10 10:57:11 - 2025-08-10 10:57:11 2460897.9563773 - 2460897.9563773 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507972 2025-08-10 10:57:11 2460897.9563773 19.5578 0.1915 ABMag g-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-08-17 13:52:09 - 2025-08-17 13:52:09 2460905.07788 - 2460905.07788 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
509733 2025-08-17 13:52:09 2460905.07788 19.384 0.117 19.81 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 110 Robot
i-P1 PS1_GPC1 2025-10-06 11:17:23 - 2025-10-06 11:17:23 2460954.97041 - 2460954.97041 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
522653 2025-10-06 11:17:23 2460954.97041 18.89 0.13 20.7 ABMag i-P1 PS1_GPC1 27 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
283345 2025-12-28 21:06:21 PS1_Bot1 K. C. Chambers, T. de Boer, J. Fairlamb et al. Pan-STARRS Pan-STARRS 02:32:58.156 +42:58:55.14 2025-09-07 11:43:53.184 18.77 i-P1 PSN PS25hto Pan-STARRS N
272674 2025-10-09 17:49:09 YSE_Bot1 D. O. Jones (UC Santa Cruz), K. D. French (Carnegie, Illinois), A. Agnello et al. YSE Pan-STARRS 02:32:58.153 +42:58:55.18 2025-10-06 11:17:23.424 18.89 i-P1 PSN PS25hto Pan-STARRS N
266273 2025-08-17 17:38:05 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 02:32:58.160 +42:58:54.83 2025-08-17 13:52:08.832 19.384 orange-ATLAS PSN ATLAS25jrf ATLAS N
265351 2025-08-10 15:19:54 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 02:32:58.169 +42:58:55.14 2025-08-10 10:57:10.998 19.5578 g-ZTF PSN ZTF25abeqaoy ZTF 2025TNSTR3137....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
22020 2025-09-14 22:21:58 Steve Schulze A. Aryan, T.-W. Chen (NCU), S. Schulze (NU, CIERA), J. Sollerman (OKC), A. Gangopadhyay (OKC) report on behalf of the ZTF SLSN Science Working Group ZTF SLSN-II 0.12 1 ZTF SNID-SAGE classification. Ok-ish matches with H-rich SLSN PS15br. H-a coincides with a strong telluric feature. Redshift from SN template matching. 2025TNSCR3698....1A
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
22020 2025-09-04 01:54:11 NOT / ALFOSC 1800 J. Sollerman, A. Gangopadhyay A. Gangopadhyay ZTF tns_2025tll_2025-09-04_01-54-11_NOT_ALFOSC_ZTF.txt Object

Comments

TNS
System

Sun, 12/28/2025 - 21:06

Object coordinates updated

Object coordinates updated according to AT-report 283345 of Group Pan-STARRS
Previous RA, DEC: 02:32:58.153, +42:58:55.18 (38.2423052802, +42.9819941949)
Updated RA, DEC: 02:32:58.156, +42:58:55.14 (38.2423177158, +42.9819840711)

TNS
System

Thu, 10/09/2025 - 17:49

Object coordinates updated

Object coordinates updated according to AT-report 272674 of Group Pan-STARRS
Previous RA, DEC: 02:32:58.169, +42:58:55.14 (38.2423724, +42.9819831)
Updated RA, DEC: 02:32:58.153, +42:58:55.18 (38.2423052802, +42.9819941949)