RA/DEC (2000)
23:49:58.270 -25:10:18.70
357.492790877 -25.1718620489
Type
SN IIP
Redshift
0.044
Discovery ReportClassification Report
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-09-22 22:59:43.296
TNS AT
Y
Public
Y
Discovery Mag
19.262
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, P. J. Broda (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_2025yma - 2025-10-07 00:00:00 LT / SPRAT (TCD)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-S_GOTO-4_L
 ▌GOTO-N_GOTO-2_L
 ▌ATLAS-STH_ATLAS-03_orange
 ▌BG4_BlackGEM-Cam4_BG-q
 ▌ML1_MeerLICHT-Cam_BG-q
 ▌PS1_GPC1_w
   
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
22175 2025-10-07 00:00:00 LT / SPRAT 1200 Cillian O'Donnell, Kate Maguire, Umut Burgaz, Christine Collins, Ravi Seth, CG Touchard-Paxton, Jacobus Terwel, Thomas Muller Br Cillian O'Donnell TCD tns_2025yma_2025-10-07_LT_SPRAT_TCD.text Object around peak
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
Clear- LAST_LAST-Cam 2024-11-30 17:53:17 - 2025-10-12 18:21:15 2460645.24534 - 2460961.26476 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
523341 2025-10-12 18:21:15 2460961.26476 17.9 ABMag Clear- LAST_LAST-Cam 380
523340 2024-11-30 17:53:17 2460645.24534 20.02 ABMag Clear- LAST_LAST-Cam 400 [Last non detection]
L-GOTO GOTO-S_GOTO-4 2025-09-28 11:59:36 - 2025-09-28 11:59:36 2460946.999719 - 2460946.999719 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
521041 2025-09-28 11:59:36 2460946.999719 17.88 0.04 ABMag L-GOTO GOTO-S_GOTO-4 180
L-GOTO GOTO-N_GOTO-2 2025-09-03 00:50:02 - 2025-09-03 00:50:02 2460921.534736 - 2460921.534736 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
521040 2025-09-03 00:50:02 2460921.534736 19.1 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
orange-ATLAS ATLAS-STH_ATLAS-03 2025-09-20 00:45:18 - 2025-09-22 22:59:43 2460938.53146 - 2460941.45814 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519795 2025-09-22 22:59:43 2460941.45814 19.262 0.176 19.61 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot
519794 2025-09-20 00:45:18 2460938.53146 16.12 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
BG-q-BlackGem BG4_BlackGEM-Cam4 2025-11-15 03:26:43 - 2025-11-15 03:26:43 2460994.6435532 - 2460994.6435532 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
531125 2025-11-15 03:26:43 2460994.6435532 19.24 0.07 21.02 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic
BG-q-BlackGem ML1_MeerLICHT-Cam 2022-06-19 03:00:00 - 2022-06-19 03:00:00 2459749.625 - 2459749.625 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
531124 2022-06-19 03:00:00 2459749.625 21.51 ABMag BG-q-BlackGem ML1_MeerLICHT-Cam 60 robotic [Last non detection]
w-P1 PS1_GPC1 2025-11-15 06:12:31 - 2025-11-15 06:12:31 2460994.75869 - 2460994.75869 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
551526 2025-11-15 06:12:31 2460994.75869 19.3 0.04 22 ABMag w-P1 PS1_GPC1 45 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
287869 2026-01-19 11:28:02 PS1_Bot1 K. C. Chambers, T. de Boer, J. Fairlamb et al. Pan-STARRS Pan-STARRS 23:49:58.270 -25:10:18.70 2025-11-15 06:12:30.816 19.3 w-P1 PSN PS25mta Pan-STARRS N
276807 2025-11-15 08:39:02 BlackGEM_Bot1 G. Ramsay, H. Tranin, F. Stoppa et al. BlackGEM BlackGEM 23:49:58.236 -25:10:18.88 2025-11-15 03:26:43.000 19.24 BG-q-BlackGem PSN BGEM J234958.24-251018.9 BlackGEM N
273097 2025-10-12 18:44:25 LAST_Bot1 R. Konno (WIS), E. A. Zimmerman (WIS), A. Horowicz (WIS) et al. LAST LAST 23:49:58.260 -25:10:18.87 2025-10-12 18:21:15.264 17.9 Clear- PSN LAST N
271841 2025-09-30 11:35:28 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 23:49:58.247 -25:10:18.61 2025-09-28 11:59:35.808 17.88 L-GOTO Other GOTO25hyd GOTO N
271241 2025-09-24 23:25:40 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 23:49:58.264 -25:10:18.67 2025-09-22 22:59:43.296 19.262 orange-ATLAS PSN ATLAS25lwd ATLAS 2025TNSTR3842....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
22175 2025-10-08 11:21:15 Cillian O'Donnell Cillian O'Donnell, Kate Maguire, Umut Burgaz, Christine Collins, Ravi Seth, CG Touchard-Paxton, Jacobus Terwel, Thomas Muller Bravo TCD SN IIP 0.044 1 TCD snid classification and redshift 2025TNSCR4046....1O
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
22175 2025-10-07 00:00:00 LT / SPRAT 1200 Cillian O'Donnell, Kate Maguire, Umut Burgaz, Christine Collins, Ravi Seth, CG Touchard-Paxton, Jacobus Terwel, Thomas Muller Br Cillian O'Donnell TCD tns_2025yma_2025-10-07_LT_SPRAT_TCD.text Object around peak

Comments

TNS
System

Mon, 01/19/2026 - 11:28

Object coordinates updated

Object coordinates updated according to AT-report 287869 of Group Pan-STARRS
Previous RA, DEC: 23:49:58.236, -25:10:18.88 (357.49265, -25.171911)
Updated RA, DEC: 23:49:58.270, -25:10:18.70 (357.492790877, -25.1718620489)

TNS
System

Sat, 11/15/2025 - 08:39

Object coordinates updated

Object coordinates updated according to AT-report 276807 of Group BlackGEM
Previous RA, DEC: 23:49:58.264, -25:10:18.67 (357.492765882, -25.1718523529)
Updated RA, DEC: 23:49:58.236, -25:10:18.88 (357.49265, -25.171911)