RA/DEC (2000)
23:12:39.451 +00:31:37.68
348.164377581 +0.52713275152802
Type
SN II
Redshift
0.033
Discovery ReportClassification Report
Related AstroNotes: 2025-220
Reporting Group
ALeRCE
Discovering Data Source
ZTF
Discovery Date
2025-06-20 10:12:27.000
TNS AT
Y
Public
Y
Discovery Mag
19.5886
Filter
r-ZTF
Reporter/s
S. Jurado, F.E. Bauer, F. Forster, , G. Pignata, A. Munoz-Arancibia, A. Mourao, L. Hernandez-Garcia, L. Galbany, J. Silva-Farfan, R. Dastidar, J.P. Brandt, A. Alvarez, G. Cabrera-Vives, R. Carrasco-Davis, P.A. Estevez, B. Gamboa, P. Huijse, H. Larranaga, C. Mansilla, K. Medina, D. Moreno, E. Munoz, E. Pizarro, I. Reyes, P. Sanchez-Saez, D. Rodriguez-Mancini, M. Catelan, S. Eyheramendy, M.J. Graham on behalf of the ALeRCE broker
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025oje - 2025-07-18 09:14:02 ESO-NTT / EFOSC2-NTT (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

 ▌ATLAS-TDO_ATLAS-05_wide
 ▌GOTO-S_GOTO-4_L
 ▌ATLAS-STH_ATLAS-03_cyan
 ▌BG4_BlackGEM-Cam4_BG-q
 ▌BG2_BlackGEM-Cam2_BG-q
 ▌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
21574 2025-07-18 09:14:02 ESO-NTT / EFOSC2-NTT 1200 G. Csoernyei G. Csoernyei None tns_2025oje_2025-07-18_09-14-02.311_ESO-NTT_EFOSC2-NTT_None.asci tns_2025oje_2025-07-18_09-14-02.311_ESO-NTT_EFOSC2-NTT_None.fits Object Quick-reduction spectrum
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-07-02 04:35:29 - 2025-07-02 04:35:29 2460858.69131 - 2460858.69131 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
501884 2025-07-02 04:35:29 2460858.69131 19.725 0.154 20.04 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
L-GOTO GOTO-S_GOTO-4 2025-06-15 16:56:22 - 2025-06-21 16:32:47 2460842.205814 - 2460848.189426 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
498357 2025-06-21 16:32:47 2460848.189426 19.41 0.13 ABMag L-GOTO GOTO-S_GOTO-4 180
498356 2025-06-15 16:56:22 2460842.205814 18.8 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
cyan-ATLAS ATLAS-STH_ATLAS-03 2025-07-01 03:26:03 - 2025-07-01 03:26:03 2460857.64309 - 2460857.64309 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
501883 2025-07-01 03:26:03 2460857.64309 19.53 ABMag cyan-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
BG-q-BlackGem BG4_BlackGEM-Cam4 2025-06-10 10:05:36 - 2025-06-10 10:05:36 2460836.9205556 - 2460836.9205556 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
498025 2025-06-10 10:05:36 2460836.9205556 19.83 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic [Last non detection]
BG-q-BlackGem BG2_BlackGEM-Cam2 2025-06-21 09:38:47 - 2025-06-21 09:38:47 2460847.9019329 - 2460847.9019329 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
498026 2025-06-21 09:38:47 2460847.9019329 19.62 0.13 20.62 ABMag BG-q-BlackGem BG2_BlackGEM-Cam2 60 robotic
r-ZTF P48_ZTF-Cam 2025-06-20 10:12:27 - 2025-06-20 10:12:27 2460846.9253125 - 2460846.9253125 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
496989 2025-06-20 10:12:27 2460846.9253125 19.5886 0.148772 19.8808 ABMag r-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF
g-ZTF P48_ZTF-Cam 2025-06-14 10:32:00 - 2025-06-20 11:01:30 2460840.9388889 - 2460846.959375 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
496990 2025-06-20 11:01:30 2460846.959375 19.4666 0.141592 20.019 ABMag g-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF
496988 2025-06-14 10:32:00 2460840.9388889 19.4486 ABMag g-ZTF P48_ZTF-Cam 30 Robot [Last non detection] Data provided by ZTF
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
262089 2025-07-11 10:32:30 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 23:12:39.436 +00:31:37.57 2025-07-02 04:35:29.184 19.725 wide-ATLAS PSN ATLAS25hfz ATLAS N
260101 2025-06-26 06:59:19 GOTO_bot S. Belkin, G. Ramsay, K. Ackley et al. GOTO GOTO 23:12:39.439 +00:31:37.73 2025-06-21 16:32:46.752 19.41 L-GOTO Other GOTO25ees GOTO N
259974 2025-06-25 06:23:52 BlackGEM_Bot1 S. Faris, H. Tranin, F. Stoppa et al. BlackGEM BlackGEM 23:12:39.450 +00:31:37.67 2025-06-21 09:38:47.000 19.62 BG-q-BlackGem 1 PSN BGEM J231239.44+003137.6 BlackGEM N
Related files
File Comments Last Modified (UT) Modified By
tns_2025oje_atrep_259974_BlackGEM.pdf Finding Chart 2025-06-25 06:24:05 BlackGEM_Bot1
259473 2025-06-20 23:26:27 ALeRCE S. Jurado, F.E. Bauer, F. Forster et al. ALeRCE ZTF 23:12:39.451 +00:31:37.68 2025-06-20 10:12:27.000 19.5886 r-ZTF PSN ZTF25aawdzpn ZTF Early SN candidate (g-rise > 0.06+-0.01 mag/day) classified using ALeRCE's stamp classifier (Carrasco-Davis et al. 2021) and the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF25aawdzpn 2025TNSTR2307....1J N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21574 2025-07-19 21:31:39 Geza Csornyei G. Csoernyei, M. Vioque, M. Mirabile (ESO), G. Fernandes Goncalves (Federal University of Technology), L. Hauer (University of Vienna), P. M. Lequizamon Pineda (Università degli Studi di Padova), A. Moore (University College Cork), E. Nilson (Lund University), A. Pisapia (INAF-OAS), J. Willingham (Macquarie University) None SN II 0.033 1 The spectrum shows broad P Cygni features of hydrogen, along with a clear metal line blanketing region, indicating this is a Type II supernova. Redshift was measured using narrow H alpha emission seen in the spectrum. 2025TNSCR2777....1C
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
21574 2025-07-18 09:14:02 ESO-NTT / EFOSC2-NTT 1200 G. Csoernyei G. Csoernyei None tns_2025oje_2025-07-18_09-14-02.311_ESO-NTT_EFOSC2-NTT_None.asci tns_2025oje_2025-07-18_09-14-02.311_ESO-NTT_EFOSC2-NTT_None.fits Object Quick-reduction spectrum

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