RA/DEC (2000)
04:31:00.535 -68:29:50.28
67.75223 -68.4973
Type
Nova
Redshift
0.00087
Discovery ReportClassification Report
Related AstroNotes: 2026-140
Reporting Group
ASAS-SN
Discovering Data Source
ASAS-SN
Discovery Date
2026-03-07 21:36:00.000
TNS AT
Y
Public
Y
Host Name
LMC
Discovery Mag
10.5
Filter
g-Sloan
Reporter/s
K. Z. Stanek, for the ASAS-SN team
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2026fbz - 2026-03-08 18:07:42 Lesedi / Mookodi (BlackGEM)z=
▌Show H at z=vexp= km/s
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▌Show Ca II at z=vexp= km/s
▌Show [Ca II] at z=vexp= km/s
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 ▌ASASSN-5_Payne-Gaposchkin_g
 ▌ASASSN-2_Cassius_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
23166 2026-03-08 18:07:42 Lesedi / Mookodi SAAO io_robot BlackGEM tns_2026fbz_2026-03-08_18-07-42_Lesedi_Mookodi_BlackGEM.txt Object The spectrum shows prominent Balmer emission lines, including Hα, Hβ, and Hγ, together with several metal lines characteristic of early-time nova spectra. In particular, we identify Fe II emission lines at 4924 Å, 5018 Å, and 5169 Å, as well as He I emission at 5876 Å and 7065 Å. Additional emission features consistent with N III near 4638 Å and O I at 7773 Å are also present.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
g-Sloan ASASSN-5_Payne-Gaposchkin 2026-03-07 21:36:00 - 2026-03-07 21:36:00 2461107.4 - 2461107.4 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
563466 2026-03-07 21:36:00 2461107.4 10.5 ABMag g-Sloan ASASSN-5_Payne-Gaposchkin
g-Sloan ASASSN-2_Cassius 2026-03-06 02:38:24 - 2026-03-06 02:38:24 2461105.61 - 2461105.61 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
563465 2026-03-06 02:38:24 2461105.61 16.5 ABMag g-Sloan ASASSN-2_Cassius [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
293920 2026-03-08 17:57:20 Krzysztof Stanek K. Z. Stanek, for the ASAS-SN team ASAS-SN ASAS-SN 04:31:00.535 -68:29:50.28 2026-03-07 21:36:00.000 10.5 g-Sloan PNV LMC ASASSN-26bl ASAS-SN Most likely a young, bright Nova in the LMC; possible match to a known OGLE eclipsing binary 2026TNSTR.960....1S N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
23165 2026-03-09 10:34:11 Moses Mlangeni Moses Mlangeni (UCT/SAAO), Paul Groot (Radboud/UCT/SAAO), Simone Scaringi (Durham), Victor Moloi (UCT/SAAO), Gavin Ramsay (Armagh), Nadia Blagorodnova (ICCUB), BlackGEM Nova 0.00087 1 BlackGEM We obtained an optical spectrum of AT2026fbz on 2026-03-08T 18:07:42 UTC ~15 minutes after it was reported to the TNS by ASAS-SN using the Lesedi 1.0-m telescope at the South African Astronomical Observatory (SAAO) equipped with the Mookodi spectrograph. The data was reduced with Mookodi spectroscopic pipeline, and the resulting spectrum was analysed with SNID-Sage to extract a redshift of z = 0.00087, which is consistent with redshift measurements of the LMC. The spectrum shows prominent Balmer emission lines, including Hα, Hβ, and Hγ, together with several metal lines characteristic of early-time nova spectra. In particular, we identify Fe II emission lines at 4924 Å, 5018 Å, and 5169 Å, as well as He I emission at 5876 Å and 7065 Å. Additional emission features consistent with N III near 4638 Å and O I at 7773 Å are also present. The presence of strong Balmer emission lines together with Fe II multiplet lines suggests that the transient is consistent with a classical nova in the LMC. We therefore classify AT2026fbz as a classical nova in the LMC with hybrid (Fe II / He–N) spectral characteristics, observed at an early stage of its eruption. 2026TNSCR.991....1M
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
23166 2026-03-08 18:07:42 Lesedi / Mookodi SAAO io_robot BlackGEM tns_2026fbz_2026-03-08_18-07-42_Lesedi_Mookodi_BlackGEM.txt Object The spectrum shows prominent Balmer emission lines, including Hα, Hβ, and Hγ, together with several metal lines characteristic of early-time nova spectra. In particular, we identify Fe II emission lines at 4924 Å, 5018 Å, and 5169 Å, as well as He I emission at 5876 Å and 7065 Å. Additional emission features consistent with N III near 4638 Å and O I at 7773 Å are also present.

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