RA/DEC (2000)
07:40:22.134 -10:00:59.68
115.0922267 -10.0165782
Type
SN II
Redshift
0.008
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-12-03 02:08:30.336
TNS AT
Y
Public
Y
Discovery Mag
17.17
Filter
L-GOTO
Reporter/s
A. Kumar, D. O'Neill, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, R. Starling, B. Gompertz, B. Godson, T. Killestein, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025aftz - 2025-12-17 04:42:46 LT / SPRAT (GOTO)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
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌GOTO-N_GOTO-1_L
 ▌P48_ZTF-Cam_r
   
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
22608 2025-12-17 04:42:46 LT / SPRAT Robotic GOTO tns_2025aftz_2025-12-17_04-42-46.195_LT_SPRAT_GOTO.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-12-04 00:55:23 - 2025-12-04 00:55:23 2461013.53846 - 2461013.53846 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
554475 2025-12-04 00:55:23 2461013.53846 16.276 0.132 18.29 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-12-02 03:36:19 - 2025-12-02 03:36:19 2461011.65022 - 2461011.65022 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
554474 2025-12-02 03:36:19 2461011.65022 18.32 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
L-GOTO GOTO-N_GOTO-1 2025-11-30 03:38:04 - 2025-12-03 02:08:30 2461009.651444 - 2461012.589244 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
535914 2025-12-03 02:08:30 2461012.589244 17.17 0.06 ABMag L-GOTO GOTO-N_GOTO-1 180
535913 2025-11-30 03:38:04 2461009.651444 19.8 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2021-04-05 05:10:41 - 2025-12-12 10:51:53 2459309.7157523 - 2461021.9526968 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
539435 2025-12-12 10:51:53 2461021.9526968 15.3694 0.0267542 ABMag r-ZTF P48_ZTF-Cam
539434 2025-12-06 08:51:25 2461015.8690394 15.6927 0.0339492 ABMag r-ZTF P48_ZTF-Cam
539433 2021-04-05 05:10:41 2459309.7157523 20.1147 ABMag r-ZTF P48_ZTF-Cam [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
289263 2026-01-29 09:54:48 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland (IfA et al. ATLAS ATLAS 07:40:22.131 -10:00:59.67 2025-12-04 00:55:22.944 16.276 wide-ATLAS PSN ATLAS25pia ATLAS N
280859 2025-12-16 14:46:57 Fritz Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al. ZTF ZTF 07:40:22.134 -10:00:59.68 2025-12-06 08:51:25.004 15.6927 r-ZTF PSN ZTF21aasyjxq ZTF N
279301 2025-12-04 06:47:06 GOTO_bot A. Kumar,D. O'Neill,K. Ackley et al. GOTO GOTO 07:40:22.130 -10:00:59.53 2025-12-03 02:08:30.336 17.17 L-GOTO Other GOTO25lah GOTO 2025TNSTR4830....1K N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22607 2025-12-17 12:19:28 Miika Pursiainen M. Pursiainen, D. O'Neill, P. Charalampopoulos, T. Killestein, J. Lyman, B. Godson, K. Ackley, M. J. Dyer, K. Ulaczyk, S. Belkin, D. Steeghs, D. K. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. P. Breton, L. K. Nuttall, D. Pollacco, J. Casares Vel'azquez, A. Kumar, D. O'Neill on behalf of GOTO collaboration GOTO SN II 0.008 1 GOTO Type II SN near-peak brightness at z=0.008 (measured from narrow host emission lines) 2025TNSCR5019....1P
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
22608 2025-12-17 04:42:46 LT / SPRAT Robotic GOTO tns_2025aftz_2025-12-17_04-42-46.195_LT_SPRAT_GOTO.dat Object

Comments

TNS
System

Tue, 12/16/2025 - 14:46

Object coordinates updated

Object coordinates updated according to AT-report 280859 of Group ZTF
Previous RA, DEC: 07:40:22.130, -10:00:59.53 (115.092209, -10.016537)
Updated RA, DEC: 07:40:22.134, -10:00:59.68 (115.0922267, -10.0165782)