RA/DEC (2000)
20:17:22.198 +05:14:21.22
304.34249248182 +5.2392281727273
Type
SN Ia
Redshift
0.023523
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-09-21 09:09:03.456
TNS AT
Y
Public
Y
Discovery Mag
19.45
Filter
L-GOTO
Reporter/s
D. O'Neill, G. Ramsay, 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_2025yhm - 2025-09-25 05:01:53 P60 / SEDM (ZTF)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
 ▌GOTO-S_GOTO-3_L
 ▌ATLAS-CHL_ATLAS-04_cyan
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_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
22098 2025-09-25 05:01:53 P60 / SEDM 2160 SEDmRobot auto ZTF tns_2025yhm_2025-09-25_05-01-52.695026_P60_SEDM_ZTF.ascii Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-09-22 21:45:33 - 2025-09-22 21:45:33 2460941.40663 - 2460941.40663 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519267 2025-09-22 21:45:33 2460941.40663 18.506 0.142 20.2 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
L-GOTO GOTO-S_GOTO-3 2025-09-20 11:19:56 - 2025-09-21 09:09:03 2460938.972179 - 2460939.881294 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519240 2025-09-21 09:09:03 2460939.881294 19.45 0.17 ABMag L-GOTO GOTO-S_GOTO-3 180
519239 2025-09-20 11:19:56 2460938.972179 19.7 ABMag L-GOTO GOTO-S_GOTO-3 180 [Last non detection]
cyan-ATLAS ATLAS-CHL_ATLAS-04 2025-09-21 02:13:09 - 2025-09-21 02:13:09 2460939.59247 - 2460939.59247 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519266 2025-09-21 02:13:09 2460939.59247 19.03 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
r-ZTF P48_ZTF-Cam 2025-09-20 04:44:18 - 2025-09-23 04:53:56 2460938.6974306 - 2460941.7041204 4
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
522575 2025-09-23 04:53:56 2460941.7041204 18.2413 0.067866 20.0469 ABMag r-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF, classified by Fink
519825 2025-09-21 03:34:59 2460939.649294 19.4487 0.144389 ABMag r-ZTF P48_ZTF-Cam
519824 2025-09-20 04:44:18 2460938.6974306 20.68 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
522574 2025-09-20 04:44:18 2460938.6974306 20.68 ABMag r-ZTF P48_ZTF-Cam 30 Robot [Last non detection] Data provided by ZTF, classified by Fink
g-ZTF P48_ZTF-Cam 2025-09-25 04:10:16 - 2025-09-25 04:10:16 2460943.6737963 - 2460943.6737963 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519826 2025-09-25 04:10:16 2460943.6737963 17.7203 0.0550796 ABMag g-ZTF P48_ZTF-Cam
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
272639 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 20:17:22.198 +05:14:21.22 2025-09-23 04:53:56.003 18.2413 r-ZTF PSN ZTF25abskhhq ZTF Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25abskhhq N
271256 2025-09-25 04:29:56 BTSbot_bot Nabeel Rehemtulla (CIERA,NU),Wynn Jacobson-Galán (Caltech) et al. ZTF ZTF 20:17:22.197 +05:14:21.18 2025-09-21 03:34:59.001 19.4487 r-ZTF PSN ZTF25abskhhq ZTF Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167). N
270997 2025-09-23 07:36:39 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 20:17:22.204 +05:14:21.16 2025-09-22 21:45:32.832 18.506 wide-ATLAS PSN ATLAS25lvi ATLAS N
270986 2025-09-23 04:10:41 GOTO_bot D. O'Neill,G. Ramsay,K. Ackley et al. GOTO GOTO 20:17:22.263 +05:14:22.00 2025-09-21 09:09:03.456 19.45 L-GOTO Other GOTO25hlp GOTO 2025TNSTR3820....1O N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22098 2025-09-25 05:44:47 ZTF_Bot1 C. Fremling, D. Neill, Y. Sharma on behalf of the SEDM Team (Caltech) and the Zwicky Transient Facility (ZTF) based on SNIascore ZTF SN Ia 0.023523 1 ZTF 2025TNSCR3868....1F
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
22098 2025-09-25 05:01:53 P60 / SEDM 2160 SEDmRobot auto ZTF tns_2025yhm_2025-09-25_05-01-52.695026_P60_SEDM_ZTF.ascii Object

Comments

TNS
System

Wed, 10/08/2025 - 18:16

Object coordinates updated

Object coordinates updated according to AT-report 272639 of Group ZTF
Previous RA, DEC: 20:17:22.197, +05:14:21.18 (304.3424879, +5.2392166)
Updated RA, DEC: 20:17:22.198, +05:14:21.22 (304.34249248182, +5.2392281727273)

TNS
System

Thu, 09/25/2025 - 04:29

Object coordinates updated

Object coordinates updated according to AT-report 271256 of Group ZTF
Previous RA, DEC: 20:17:22.204, +05:14:21.16 (304.3425175, +5.2392125)
Updated RA, DEC: 20:17:22.197, +05:14:21.18 (304.3424879, +5.2392166)

TNS
System

Tue, 09/23/2025 - 07:36

Object coordinates updated

Object coordinates updated according to AT-report 270997 of Group ATLAS
Previous RA, DEC: 20:17:22.263, +05:14:22.00 (304.342761, +5.239445)
Updated RA, DEC: 20:17:22.204, +05:14:21.16 (304.3425175, +5.2392125)