RA/DEC (2000)
04:33:31.391 +68:19:59.63
68.3807955 +68.3332314
Type
SN IIb
Redshift
0.0116
Discovery ReportClassification Report
Related AstroNotes: DRAFT-2349, 2025-332
Reporting Group
ALeRCE
Discovering Data Source
ZTF
Discovery Date
2025-11-04 07:37:28.001
TNS AT
Y
Public
Y
Host Name
2MFGC 3714
Discovery Mag
19.3423
Filter
r-ZTF
Reporter/s
A. Munoz-Arancibia, F.E. Bauer, G. Pignata, F. Forster, A. Mourao, S. Jurado, L. Hernandez-Garcia, L. Galbany, J. Silva-Farfan, R. Dastidar, J.P. Brandt, A. Alvarez, F. Andrades, G. Cabrera-Vives, R. Carrasco-Davis, P.A. Estevez, P. Huijse, H. Larranaga, C. Mansilla, K. Medina, D. Moreno, E. Munoz, 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_2025acnj - 2025-11-27 07:52:18 MMT / BINOSPEC (ZTF)z=
 ▌SN_2025acnj - 2025-11-25 02:59:34 P60 / SEDM (ZTF)z=
 ▌SN_2025acnj - 2025-11-24 23:05:18 LT / SPRAT (ZTF)z=
 ▌SN_2025acnj - 2025-11-23 00:00:00 FLWO-1.5m / FAST (VHU-TDA)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-N_GOTO-2_L
 ▌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
22466 2025-11-27 07:52:18 MMT / BINOSPEC MMT Queue Observers ZTF tns_2025acnj_2461006.82799000_MMT_BINOSPEC_ZTF.ascii Object
22443 2025-11-25 02:59:34 P60 / SEDM 2700 SEDmRobot auto ZTF tns_2025acnj_2025-11-25_02-59-34.025796_P60_SEDM_ZTF.ascii Object
22449 2025-11-24 23:05:18 LT / SPRAT Daniel Perley, Jacob Wise, K-Ryan Hinds, Zoe McGrath Jacob Wise ZTF tns_2025acnj_2025-11-24_23-05-18.145_LT_SPRAT_ZTF.ascii Object
22488 2025-11-23 00:00:00 FLWO-1.5m / FAST 1500 Gilbert Esquerdo, Perry Berlind S. Karthik Yadavalli, Harsh Kumar VHU-TDA tns_2025acnj_2025-11-23_FLWO-1.5m_FAST_VHU-TDA.ascii Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2025-11-03 23:21:45 - 2025-11-25 22:14:00 2460983.473439 - 2461005.42639 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
534914 2025-11-25 22:14:00 2461005.42639 17.9 0.03 ABMag L-GOTO GOTO-N_GOTO-2 180
534913 2025-11-03 23:21:45 2460983.473439 19.1 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2025-11-04 07:37:28 - 2025-11-04 07:37:28 2460983.8176852 - 2460983.8176852 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
529100 2025-11-04 07:37:28 2460983.8176852 19.3423 0.162442 19.8513 ABMag r-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF
g-ZTF P48_ZTF-Cam 2025-11-04 04:49:58 - 2025-11-04 04:49:58 2460983.7013657 - 2460983.7013657 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
529099 2025-11-04 04:49:58 2460983.7013657 19.3045 ABMag g-ZTF P48_ZTF-Cam 30 Robot [Last non detection] Data provided by ZTF
orange-ATLAS ATLAS-MLO_ATLAS-01 2025-11-10 11:09:43 - 2025-11-11 10:41:36 2460989.96508 - 2460990.94556 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
530632 2025-11-11 10:41:36 2460990.94556 18.492 0.12 19.22 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot
530631 2025-11-10 11:09:43 2460989.96508 18.89 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
278772 2025-11-29 21:20:54 GOTO_bot G. Ramsay,D. O'Neill,K. Ackley et al. GOTO GOTO 04:33:31.366 +68:19:59.94 2025-11-25 22:14:00.096 17.9 L-GOTO Other GOTO25kru GOTO N
276493 2025-11-12 11:53:41 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 04:33:31.368 +68:19:59.66 2025-11-11 10:41:36.384 18.492 orange-ATLAS PSN ATLAS25oei ATLAS N
275805 2025-11-04 13:37:42 ALeRCE A. Munoz-Arancibia,F.E. Bauer,G. Pignata et al. ALeRCE ZTF 04:33:31.391 +68:19:59.63 2025-11-04 07:37:28.001 19.3423 r-ZTF PSN 2MFGC 3714 ZTF25acctbaz ZTF Early SN candidate (r-rise > 0.33+-0.04 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/ZTF25acctbaz 2025TNSTR4433....1M N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22487 2025-12-02 01:18:29 VHU-TDA Yize Dong, Anya Nugent, V. Ashley Villar, S. Karthik Yadavalli, Alex Gagliano, Kaylee de Soto, Danielle Frostig, Harsh Kumar, Peter Blanchard VHU-TDA SN IIb 0.0116 1 1 VHU-TDA redshift measured from the narrow host lines 2025TNSCR4810....1D
Related files
File Comments Last Modified (UT) Modified By
tns_2025acnj_atrep_22487_VHU-TDA.png best match with 2003bg from SNID-SAGE 2025-12-02 01:18:32 VHU-TDA
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
22488 2025-11-23 00:00:00 FLWO-1.5m / FAST 1500 Gilbert Esquerdo, Perry Berlind S. Karthik Yadavalli, Harsh Kumar VHU-TDA tns_2025acnj_2025-11-23_FLWO-1.5m_FAST_VHU-TDA.ascii Object
22465 2025-11-28 16:20:30 Nabeel Rehemtulla Nabeel Rehemtulla (NU, CIERA) and Jesper Sollerman (Stockholm University) on behalf of the ZTF Collaboration ZTF SN IIb 0.0117 1 ZTF We revise this classification to SN IIb based on He I lines detected in absorption at ~7,500 km/s. We also revise the redshift to z=0.0117 based on host emission lines in our spectrum. 2025TNSCR4754....1R
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
22466 2025-11-27 07:52:18 MMT / BINOSPEC MMT Queue Observers ZTF tns_2025acnj_2461006.82799000_MMT_BINOSPEC_ZTF.ascii Object
22448 2025-11-25 12:40:24 Jacob Wise Jacob Wise (LJMU), Daniel Perley (LJMU), Zoe McGrath (LJMU), K-Ryan Hinds (Caltech) ZTF SN II 0.0107 1 ZTF Spectrum displays broad hydrogen balmer features, confirming previous SN II classification. Redshift of z = 0.0107 ± 0.0007 from host H-alpha emission in LT SPRAT spectrum. 2025TNSCR4717....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
22449 2025-11-24 23:05:18 LT / SPRAT Daniel Perley, Jacob Wise, K-Ryan Hinds, Zoe McGrath Jacob Wise ZTF tns_2025acnj_2025-11-24_23-05-18.145_LT_SPRAT_ZTF.ascii Object
22442 2025-11-25 05:10:39 ZTF_Bot1 J. Sollerman, S. Covarrubias, M. Chu, C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF) ZTF SN II 0.013 1 ZTF 2025TNSCR4715....1S
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
22443 2025-11-25 02:59:34 P60 / SEDM 2700 SEDmRobot auto ZTF tns_2025acnj_2025-11-25_02-59-34.025796_P60_SEDM_ZTF.ascii Object

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