RA/DEC (2000)
21:22:30.762 -27:10:47.89
320.62817478889 -27.179970788889
Type
SN Ia-91T-like
Redshift
0.037
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-09-29 12:16:56.064
TNS AT
Y
Public
Y
Discovery Mag
19.18
Filter
L-GOTO
Reporter/s
G. Ramsay, D. O'Neill, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025ywa - 2025-10-07 20:54:50 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
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▌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-S_GOTO-4_L
 ▌GOTO-N_GOTO-2_L
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌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
22173 2025-10-07 20:54:50 LT / SPRAT Robotic GOTO tns_2025ywa_2025-10-07_20-54-49.910_LT_SPRAT_GOTO.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-09-29 12:16:56 - 2025-09-29 12:16:56 2460948.011762 - 2460948.011762 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
520776 2025-09-29 12:16:56 2460948.011762 19.18 0.12 ABMag L-GOTO GOTO-S_GOTO-4 180
L-GOTO GOTO-N_GOTO-2 2025-09-08 23:12:25 - 2025-09-08 23:12:25 2460927.46696 - 2460927.46696 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
520775 2025-09-08 23:12:25 2460927.46696 18.3 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-10-06 02:43:53 - 2025-10-06 02:43:53 2460954.61381 - 2460954.61381 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
522385 2025-10-06 02:43:53 2460954.61381 17.792 0.17 18.2 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
r-ZTF P48_ZTF-Cam 2025-09-25 06:44:00 - 2025-09-30 04:31:45 2460943.7805556 - 2460948.6887153 4
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
520869 2025-09-30 04:31:45 2460948.6887153 18.8016 0.105595 ABMag r-ZTF P48_ZTF-Cam
522581 2025-09-30 04:31:45 2460948.6887153 18.8016 0.105595 19.7455 ABMag r-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF, classified by Fink
520868 2025-09-25 06:44:00 2460943.7805556 19.7496 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
522580 2025-09-25 06:44:00 2460943.7805556 19.7496 ABMag r-ZTF P48_ZTF-Cam 30 Robot [Last non detection] Data provided by ZTF, classified by Fink
g-ZTF P48_ZTF-Cam 2025-09-30 06:11:20 - 2025-09-30 06:11:20 2460948.7578704 - 2460948.7578704 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
520870 2025-09-30 06:11:20 2460948.7578704 18.9608 0.0907918 ABMag g-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-MLO_ATLAS-01 2025-10-01 06:50:53 - 2025-10-01 06:50:53 2460949.78534 - 2460949.78534 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
522384 2025-10-01 06:50:53 2460949.78534 18.81 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
272642 2025-10-08 18:16:34 Fink Julien Peloton,Anais Moller,Emille E. O. Ishida on behalf of the Fink broker et al. Fink ZTF 21:22:30.762 -27:10:47.89 2025-09-30 04:31:45.002 18.8016 r-ZTF PSN ZTF25abtzltn ZTF Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25abtzltn N
272559 2025-10-06 05:59:30 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 21:22:30.773 -27:10:47.84 2025-10-06 02:43:53.184 17.792 orange-ATLAS PSN ATLAS25mkm ATLAS N
271762 2025-09-30 08:16:25 Fritz Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al. ZTF ZTF 21:22:30.758 -27:10:47.83 2025-09-30 04:31:45.001 18.8016 r-ZTF PSN ZTF25abtzltn ZTF N
271707 2025-09-29 16:05:18 GOTO_bot G. Ramsay,D. O'Neill,K. Ackley et al. GOTO GOTO 21:22:30.790 -27:10:47.94 2025-09-29 12:16:56.064 19.18 L-GOTO Other GOTO25ian GOTO 2025TNSTR3906....1R N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22173 2025-10-08 08:15:12 Miika Pursiainen M. Pursiainen, D. O'Neill, 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 on behalf of GOTO collaboration GOTO SN Ia-91T-like 0.037 1 GOTO Good template matches to Ia-91T-like SNe at the host redsfhit (0.037, NED) 2025TNSCR4045....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
22173 2025-10-07 20:54:50 LT / SPRAT Robotic GOTO tns_2025ywa_2025-10-07_20-54-49.910_LT_SPRAT_GOTO.dat Object

Comments

TNS
System

Wed, 10/08/2025 - 18:16

Object coordinates updated

Object coordinates updated according to AT-report 272642 of Group ZTF
Previous RA, DEC: 21:22:30.758, -27:10:47.83 (320.6281598, -27.1799517)
Updated RA, DEC: 21:22:30.762, -27:10:47.89 (320.62817478889, -27.179970788889)

TNS
System

Tue, 09/30/2025 - 08:16

Object coordinates updated

Object coordinates updated according to AT-report 271762 of Group ZTF
Previous RA, DEC: 21:22:30.790, -27:10:47.94 (320.628292, -27.179983)
Updated RA, DEC: 21:22:30.758, -27:10:47.83 (320.6281598, -27.1799517)