RA/DEC (2000)
23:20:44.946 +18:50:12.55
350.1872759 +18.8368185
Type
SN II
Redshift
0.038
Discovery ReportClassification Report
Related AstroNotes: 2025-264, 2025-269
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-08-05 11:23:39.264
TNS AT
Y
Public
Y
Discovery Mag
18.814
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), M. R. Alarcón, J. Licandro, P. Nichita (IAC), 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_2025tgu - 2025-08-28 04:20:09 NOT / ALFOSC (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

 ▌LAST_LAST-Cam_Clear
 ▌GOTO-N_GOTO-1_L
 ▌P48_ZTF-Cam_i
 ▌ATLAS-MLO_ATLAS-01_orange
 ▌ATLAS-HKO_ATLAS-02_cyan
   
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
21894 2025-08-28 04:20:09 NOT / ALFOSC I. Worssam, M. Pursiainen M. Pursiainen, I. Worssam GOTO tns_2025tgu_2025-08-28_04-20-09.186_NOT_ALFOSC_GOTO.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
Clear- LAST_LAST-Cam 2025-07-20 23:16:32 - 2025-08-04 23:36:05 2460877.46982 - 2460892.48339 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507607 2025-08-04 23:36:05 2460892.48339 19.18 ABMag Clear- LAST_LAST-Cam 400
507606 2025-07-20 23:16:32 2460877.46982 21.17 ABMag Clear- LAST_LAST-Cam 400 [Last non detection]
L-GOTO GOTO-N_GOTO-1 2025-07-26 03:18:30 - 2025-08-06 01:26:45 2460882.637847 - 2460893.560242 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508299 2025-08-06 01:26:45 2460893.560242 18.46 0.15 ABMag L-GOTO GOTO-N_GOTO-1 180
508298 2025-07-26 03:18:30 2460882.637847 19.6 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
i-ZTF P48_ZTF-Cam 2025-08-01 10:24:11 - 2025-08-07 06:22:52 2460888.9334606 - 2460894.7658796 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507700 2025-08-07 06:22:52 2460894.7658796 18.7629 0.170606 ABMag i-ZTF P48_ZTF-Cam
507699 2025-08-05 08:04:31 2460892.8364699 19.2873 0.115773 ABMag i-ZTF P48_ZTF-Cam
507698 2025-08-01 10:24:11 2460888.9334606 20.1988 ABMag i-ZTF P48_ZTF-Cam [Last non detection]
orange-ATLAS ATLAS-MLO_ATLAS-01 2025-08-05 11:23:39 - 2025-08-05 11:23:39 2460892.97476 - 2460892.97476 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507542 2025-08-05 11:23:39 2460892.97476 18.814 0.127 19.42 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot
cyan-ATLAS ATLAS-HKO_ATLAS-02 2025-08-03 11:44:31 - 2025-08-03 11:44:31 2460890.98925 - 2460890.98925 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507541 2025-08-03 11:44:31 2460890.98925 19.44 ABMag cyan-ATLAS ATLAS-HKO_ATLAS-02 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
265579 2025-08-12 19:34:34 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 23:20:44.942 +18:50:12.44 2025-08-06 01:26:44.736 18.46 L-GOTO Other GOTO25frz GOTO N
265175 2025-08-07 06:48:49 Fritz Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al. ZTF ZTF 23:20:44.946 +18:50:12.55 2025-08-05 08:04:30.999 19.2873 i-ZTF PSN ZTF25abhhizk ZTF N
265122 2025-08-06 04:41:39 LAST_Bot1 E. O. Ofek (WIS),R. Konno (WIS),E. A. Zimmerman (WIS) et al. LAST LAST 23:20:44.928 +18:50:12.52 2025-08-04 23:36:04.896 19.18 Clear- PSN LAST N
265086 2025-08-05 14:41:05 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 23:20:44.950 +18:50:12.79 2025-08-05 11:23:39.264 18.814 orange-ATLAS PSN ATLAS25jcf ATLAS 2025TNSTR3076....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
21894 2025-08-28 09:54:08 Joe Lyman I. Worssam, M. Pursiainen, D. O'Neill, J. Lyman, T. Killestein, K. Ackley, M. Dyer, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, A. Kumar on behalf of GOTO collaboration GOTO SN II 0.038 1 GOTO Good template matches to a range on SN II. Redshift from narrow host galaxy emission lines in spectrum. 2025TNSCR3426....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
21894 2025-08-28 04:20:09 NOT / ALFOSC I. Worssam, M. Pursiainen M. Pursiainen, I. Worssam GOTO tns_2025tgu_2025-08-28_04-20-09.186_NOT_ALFOSC_GOTO.dat Object

Comments

TNS
System

Thu, 08/07/2025 - 06:48

Object coordinates updated

Object coordinates updated according to AT-report 265175 of Group ZTF
Previous RA, DEC: 23:20:44.950, +18:50:12.79 (350.1872925, +18.836885)
Updated RA, DEC: 23:20:44.946, +18:50:12.55 (350.1872759, +18.8368185)