RA/DEC (2000)
02:37:58.536 -01:50:59.20
39.4938979818 -1.84977902922
Type
SN II
Redshift
0.028
Discovery ReportClassification Report
Related AstroNotes: 2025-288
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-09-18 21:57:55.872
TNS AT
Y
Public
Y
Discovery Mag
18.839
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_2025xza - 2025-09-21 07:37:25 ESO-NTT / EFOSC2-NTT (ePESSTO+)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-3_L
 ▌PS2_GPC2_w
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌ATLAS-STH_ATLAS-03_orange
 ▌GOTO-N_GOTO-1_L
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌PS1_GPC1_g
   
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
22065 2025-09-21 07:37:25 ESO-NTT / EFOSC2-NTT 780 B. Warwick, A. Sahu M. Magee ePESSTO+ tns_2025xza_2025-09-21_07-37-25_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025xza_2025-09-21_07-37-25_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
Clear- LAST_LAST-Cam 2024-11-05 20:02:03 - 2025-09-22 01:10:15 2460620.33476 - 2460940.54879 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519132 2025-09-22 01:10:15 2460940.54879 18.47 ABMag Clear- LAST_LAST-Cam 400
519131 2024-11-05 20:02:03 2460620.33476 20.97 ABMag Clear- LAST_LAST-Cam 3800 [Last non detection]
L-GOTO GOTO-S_GOTO-3 2025-09-17 16:37:03 - 2025-09-17 16:37:03 2460936.1924 - 2460936.1924 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519449 2025-09-17 16:37:03 2460936.1924 18.8 ABMag L-GOTO GOTO-S_GOTO-3 180 [Last non detection]
w-P1 PS2_GPC2 2025-09-23 10:49:03 - 2025-09-23 10:49:03 2460941.95073 - 2460941.95073 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
520854 2025-09-23 10:49:03 2460941.95073 18.19 0.02 22 ABMag w-P1 PS2_GPC2 45 Robot
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-09-15 07:07:37 - 2025-09-15 07:07:37 2460933.79696 - 2460933.79696 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
518485 2025-09-15 07:07:37 2460933.79696 19.15 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
orange-ATLAS ATLAS-STH_ATLAS-03 2025-09-18 21:57:56 - 2025-09-18 21:57:56 2460937.41523 - 2460937.41523 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
518486 2025-09-18 21:57:56 2460937.41523 18.839 0.169 19.25 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot
L-GOTO GOTO-N_GOTO-1 2025-09-18 04:43:24 - 2025-09-18 04:43:24 2460936.6968 - 2460936.6968 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519450 2025-09-18 04:43:24 2460936.6968 19.61 0.16 ABMag L-GOTO GOTO-N_GOTO-1 180
r-ZTF P48_ZTF-Cam 2025-09-17 10:30:09 - 2025-09-20 10:13:47 2460935.9376042 - 2460938.9262384 4
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519964 2025-09-20 10:13:47 2460938.9262384 18.6624 0.060645 20.5625 ABMag r-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF, classified by Fink
518648 2025-09-20 08:03:09 2460938.8355208 18.6037 0.0774528 ABMag r-ZTF P48_ZTF-Cam
518647 2025-09-17 10:30:09 2460935.9376042 17.3655 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
519963 2025-09-17 10:30:09 2460935.9376042 17.3655 ABMag r-ZTF P48_ZTF-Cam 30 Robot [Last non detection] Data provided by ZTF, classified by Fink
g-ZTF P48_ZTF-Cam 2025-09-20 11:06:59 - 2025-09-20 11:06:59 2460938.9631829 - 2460938.9631829 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
518649 2025-09-20 11:06:59 2460938.9631829 18.4041 0.0798129 ABMag g-ZTF P48_ZTF-Cam
g-P1 PS1_GPC1 2025-09-22 13:31:12 - 2025-09-22 13:31:12 2460941.06333 - 2460941.06333 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519705 2025-09-22 13:31:12 2460941.06333 18.31 0.05 21 ABMag g-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
271756 2025-09-30 07:56:42 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 02:37:58.536 -01:50:59.20 2025-09-23 10:49:03.072 18.19 w-P1 PSN PS25hqf Pan-STARRS N
271312 2025-09-25 18:17:49 Fink Julien Peloton,Anais Moller,Emille E. O. Ishida on behalf of the Fink broker et al. Fink ZTF 02:37:58.534 -01:50:59.24 2025-09-20 10:13:46.998 18.6624 r-ZTF PSN ZTF25absffwy ZTF Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25absffwy N
271207 2025-09-24 16:54:25 YSE_Bot1 D. O. Jones (UC Santa Cruz),K. D. French (Carnegie,Illinois) et al. YSE Pan-STARRS 02:37:58.549 -01:50:59.08 2025-09-22 13:31:11.712 18.31 g-P1 PSN PS25hqf Pan-STARRS N
271100 2025-09-24 00:53:48 GOTO_bot D. O'Neill,G. Ramsay,K. Ackley et al. GOTO GOTO 02:37:58.525 -01:50:59.01 2025-09-18 04:43:23.520 19.61 L-GOTO Other GOTO25hpa GOTO N
270930 2025-09-22 02:07:50 LAST_Bot1 R. Konno (WIS),E. A. Zimmerman (WIS),A. Horowicz (WIS) et al. LAST LAST 02:37:58.508 -01:50:59.16 2025-09-22 01:10:15.456 18.47 Clear- PSN LAST N
270731 2025-09-20 11:17:35 BTSbot_bot Nabeel Rehemtulla (CIERA,NU),Wynn Jacobson-Galán (Caltech) et al. ZTF ZTF 02:37:58.534 -01:50:59.16 2025-09-20 08:03:08.997 18.6037 r-ZTF PSN ZTF25absffwy ZTF Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167). N
270654 2025-09-19 07:18:33 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 02:37:58.514 -01:50:58.92 2025-09-18 21:57:55.872 18.839 orange-ATLAS PSN ATLAS25lri ATLAS 2025TNSTR3766....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
22065 2025-09-21 17:49:52 ePESSTOplus_Bot1 B. Warwick, A. Sahu, M. Magee, A. Horowicz on behalf of ePESSTO+ ePESSTO+ SN II 0.028 1 ePESSTO+ 2025TNSCR3800....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
22065 2025-09-21 07:37:25 ESO-NTT / EFOSC2-NTT 780 B. Warwick, A. Sahu M. Magee ePESSTO+ tns_2025xza_2025-09-21_07-37-25_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025xza_2025-09-21_07-37-25_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments

TNS
System

Tue, 09/30/2025 - 07:56

Object coordinates updated

Object coordinates updated according to AT-report 271756 of Group Pan-STARRS
Previous RA, DEC: 02:37:58.549, -01:50:59.08 (39.4939561718, -1.84974548406)
Updated RA, DEC: 02:37:58.536, -01:50:59.20 (39.4938979818, -1.84977902922)

TNS
System

Wed, 09/24/2025 - 16:54

Object coordinates updated

Object coordinates updated according to AT-report 271207 of Group Pan-STARRS
Previous RA, DEC: 02:37:58.534, -01:50:59.16 (39.4938922, -1.8497663)
Updated RA, DEC: 02:37:58.549, -01:50:59.08 (39.4939561718, -1.84974548406)

TNS
System

Sat, 09/20/2025 - 11:17

Object coordinates updated

Object coordinates updated according to AT-report 270731 of Group ZTF
Previous RA, DEC: 02:37:58.514, -01:50:58.92 (39.49381, -1.8497)
Updated RA, DEC: 02:37:58.534, -01:50:59.16 (39.4938922, -1.8497663)