RA/DEC (2000)
06:05:35.832 -18:52:34.43
91.3993004 -18.8762316
Type
SN II
Redshift
0.022
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-10-15 17:32:10.752
TNS AT
Y
Public
Y
Discovery Mag
19.82
Filter
L-GOTO
Reporter/s
D. O'Neill, K. Ackley, M. Dyer, J. Lyman, 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, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025acej - 2025-11-07 22:48:00 HCT-2m / HFOSC (None)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

 ▌GOTO-S_GOTO-3_L
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌ATLAS-HKO_ATLAS-02_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
22375 2025-11-07 22:48:00 HCT-2m / HFOSC 2700 Gitika Rameshan Gitika Rameshan None tns_2025acej_2460987.45_HCT-2m_HFOSC_None.dat tns_2025acej_2460987.45_HCT-2m_HFOSC_None.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-3 2025-10-14 17:37:11 - 2025-10-15 17:32:11 2460963.234163 - 2460964.230679 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
528496 2025-10-15 17:32:11 2460964.230679 19.82 0.16 ABMag L-GOTO GOTO-S_GOTO-3 180
528495 2025-10-14 17:37:11 2460963.234163 20.2 ABMag L-GOTO GOTO-S_GOTO-3 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-10-30 06:31:38 - 2025-10-30 06:31:38 2460978.77197 - 2460978.77197 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
528675 2025-10-30 06:31:38 2460978.77197 19.2 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
r-ZTF P48_ZTF-Cam 2025-12-05 07:34:29 - 2025-12-05 07:34:29 2461014.8156134 - 2461014.8156134 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
536082 2025-12-05 07:34:29 2461014.8156134 18.0141 0.0595147 ABMag r-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2025-11-09 09:52:40 - 2025-11-09 09:52:40 2460988.9115741 - 2460988.9115741 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
536081 2025-11-09 09:52:40 2460988.9115741 17.1958 0.047629 ABMag g-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-11-02 11:32:29 - 2025-11-02 11:32:29 2460981.98089 - 2460981.98089 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
528676 2025-11-02 11:32:29 2460981.98089 18.235 0.129 18.45 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 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
279363 2025-12-05 08:43:38 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 06:05:35.832 -18:52:34.43 2025-11-09 09:52:40.002 17.1958 g-ZTF PSN ZTF25acdkjpq ZTF N
275595 2025-11-03 16:02:25 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 06:05:35.790 -18:52:34.60 2025-11-02 11:32:28.896 18.235 orange-ATLAS PSN ATLAS25nud ATLAS N
275513 2025-11-02 07:41:42 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 06:05:35.840 -18:52:34.50 2025-10-15 17:32:10.752 19.82 L-GOTO Other GOTO25jnh GOTO 2025TNSTR4407....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
22374 2025-11-08 19:37:38 Gitika Rameshan Gitika Rameshan (IIA), Hrishav Das (IIA), D. K. Sahu (IIA) None SN II 0.022 1 2 We classify SN 2025acej as a Type II SN based on a spectrum obtained with the 2m HCT at IAO, Hanle on JD 2460987.45. The spectrum shows a bluer continuum with narrow emission lines of H and HeI. The source was in the rising phase during observation with an apparent o-band magnitude of ~17.5 mag. The redshift measured from the H-alpha profile is z ~ 0.022, and the host galaxy redshift was reported as 0.0227. The source was classified as Type II by GELATO after cross-matching with available template spectra. 2025TNSCR4485....1R
Related files
File Comments Last Modified (UT) Modified By
tns_2025acej_atrep_22374.png 2025-11-08 19:37:39 Gitika Rameshan
tns_2025acej_atrep_22374_0.png 2025-11-08 19:37:39 Gitika Rameshan
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
22375 2025-11-07 22:48:00 HCT-2m / HFOSC 2700 Gitika Rameshan Gitika Rameshan None tns_2025acej_2460987.45_HCT-2m_HFOSC_None.dat tns_2025acej_2460987.45_HCT-2m_HFOSC_None.fits Object

Comments

TNS
System

Fri, 12/05/2025 - 08:43

Object coordinates updated

Object coordinates updated according to AT-report 279363 of Group ZTF
Previous RA, DEC: 06:05:35.790, -18:52:34.60 (91.399126, -18.876278)
Updated RA, DEC: 06:05:35.832, -18:52:34.43 (91.3993004, -18.8762316)

TNS
System

Mon, 11/03/2025 - 16:02

Object coordinates updated

Object coordinates updated according to AT-report 275595 of Group ATLAS
Previous RA, DEC: 06:05:35.840, -18:52:34.50 (91.399335, -18.876251)
Updated RA, DEC: 06:05:35.790, -18:52:34.60 (91.399126, -18.876278)