RA/DEC (2000)
09:55:51.358 +33:59:38.19
148.963992565 +33.9939403799
Type
SLSN-II
Redshift
0.097
Discovery ReportClassification Report
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-06-14 06:42:40.032
TNS AT
Y
Public
Y
Discovery Mag
18.58
Filter
orange-ATLAS
Reporter/s
J. Tonry, L. Denneau, H. Weiland, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), S. J. Smartt, K. W. Smith (Oxford/QUB), D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, C. R. Angus, A. Wilson, A. Aamer, D. Magill (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle (Oxford), L. Rhodes (TSI/McGill), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025nnd - 2025-11-18 04:41:29 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

 ▌GOTO-N_GOTO-2_L
 ▌PS2_GPC2_i
 ▌P48_ZTF-Cam_r
 ▌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
22431 2025-11-18 04:41:29 NOT / ALFOSC 2700 Jesper Sollerman, Anjasha Gangopadhyay Anjasha Gangopadhyay ZTF tns_2025nnd_2025-11-18_04-41-28.716_NOT_ALFOSC_ZTF.ascii Object The spectrum shows broad Balmer emission lines. The peak absolute magnitude of <-20 mag makes it an H-rich SLSN.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2025-10-07 06:07:03 - 2025-10-25 05:34:29 2460955.754904 - 2460973.732278 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
526767 2025-10-25 05:34:29 2460973.732278 19.31 0.11 ABMag L-GOTO GOTO-N_GOTO-2 180
526766 2025-10-07 06:07:03 2460955.754904 18.8 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
i-P1 PS2_GPC2 2025-12-03 14:20:59 - 2025-12-03 14:20:59 2461013.09791 - 2461013.09791 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
546818 2025-12-03 14:20:59 2461013.09791 18.93 0.05 20.7 ABMag i-P1 PS2_GPC2 45 Robot
r-ZTF P48_ZTF-Cam 2025-06-12 04:13:20 - 2025-06-19 04:27:04 2460838.6759259 - 2460845.685463 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
496248 2025-06-19 04:27:04 2460845.685463 18.4791 0.087803 ABMag r-ZTF P48_ZTF-Cam
496247 2025-06-12 04:13:20 2460838.6759259 18.8561 0.112036 ABMag r-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2025-05-31 06:07:11 - 2025-05-31 06:07:11 2460826.7549884 - 2460826.7549884 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
496246 2025-05-31 06:07:11 2460826.7549884 17.9984 ABMag g-ZTF P48_ZTF-Cam [Last non detection]
orange-ATLAS ATLAS-MLO_ATLAS-01 2025-06-13 07:22:47 - 2025-06-14 06:42:40 2460839.80749 - 2460840.77963 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
495075 2025-06-14 06:42:40 2460840.77963 18.58 0.116 19.34 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot
495074 2025-06-13 07:22:47 2460839.80749 17.36 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
285493 2026-01-01 21:38:40 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 09:55:51.358 +33:59:38.19 2025-12-03 14:20:59.424 18.93 i-P1 PSN PS25mjq Pan-STARRS N
274758 2025-10-25 10:12:13 GOTO_bot G. Ramsay,K. Ackley,M. Dyer et al. GOTO GOTO 09:55:51.376 +33:59:37.97 2025-10-25 05:34:28.992 19.31 L-GOTO Other GOTO25jdu GOTO N
259085 2025-06-19 06:10:16 Fritz Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al. ZTF ZTF 09:55:51.366 +33:59:38.28 2025-06-12 04:13:19.997 18.8561 r-ZTF PSN ZTF25aatmfzy ZTF N
258479 2025-06-14 14:37:03 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 09:55:51.328 +33:59:38.20 2025-06-14 06:42:40.032 18.58 orange-ATLAS PSN ATLAS25gcl ATLAS 2025TNSTR2213....1T N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22430 2025-11-18 14:44:04 Steve Schulze Steve Schulze (CIERA), Anjasha Gangopadhyay, Jesper Sollerman (both OKC) report on behalf the ZTF SLSN WG ZTF SLSN-II 0.097 1 ZTF 2025TNSCR4643....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
22431 2025-11-18 04:41:29 NOT / ALFOSC 2700 Jesper Sollerman, Anjasha Gangopadhyay Anjasha Gangopadhyay ZTF tns_2025nnd_2025-11-18_04-41-28.716_NOT_ALFOSC_ZTF.ascii Object The spectrum shows broad Balmer emission lines. The peak absolute magnitude of <-20 mag makes it an H-rich SLSN.

Comments

TNS
System

Thu, 01/01/2026 - 21:38

Object coordinates updated

Object coordinates updated according to AT-report 285493 of Group Pan-STARRS
Previous RA, DEC: 09:55:51.366, +33:59:38.28 (148.9640252, +33.993966)
Updated RA, DEC: 09:55:51.358, +33:59:38.19 (148.963992565, +33.9939403799)

TNS
System

Thu, 06/19/2025 - 06:10

Object coordinates updated

Object coordinates updated according to AT-report 259085 of Group ZTF
Previous RA, DEC: 09:55:51.328, +33:59:38.20 (148.963868, +33.993944)
Updated RA, DEC: 09:55:51.366, +33:59:38.28 (148.9640252, +33.993966)