AstroNote 2026-140

We report on the multi-band photometric monitoring campaign of SN 2026fov, a Type II Supernova and AT 2026fbz, a nova in the LMC, conducted through the BHTOM network.

SN 2026fovwas first discovered by Koichi Itagaki on March 14, 2026 (Itagaki 2026). It was classified as a Type II supernova based on the optical spectrum taken by Claudio Balcon using the Belluno Telescope with a redshift of 0.003292 (Balcon 2026). In an HST image taken on November 10, 2022, a red supergiant can be seen in this coordinate, thus it can be the possible progenitor of this supernova. BHTOM follow-up commenced on March 31, 2026 with griBVRIU optical bands. The declination phase of this supernova has been monitored by the 41-cm School Astronomical Observatory Bolecina (Poland), 50-cm OAUJ CDK Telescope (Poland), 68-cm Horten Telescope (Norway) and 36-cm Andromeda Observatory (Belgium) and the photometric observations were transformed into Gaia Synthetic Photometry (GaiaSP) for consistency. Detailed light curves and associated statistics of SN 2026fov are presented on the webpage: https://bhtom.space/public/targets/SN 2026fov.

AT 2026fbzwas first discovered by ASAS-SN in the g-band on March 7, 2026 (Stanek 2026). It is a bright Nova in the LMC. The spectrum taken by the Lesedi 1.0-m telescope at the South African Astronomical Observatory (SAAO) shows prominent Balmer emission lines, including Hα, Hβ, and Hγ, along with several metal lines characteristic of early-time nova spectra (Mlangeni et al. 2026). BHTOM follow-up commenced on March 11, 2026 with 40-cm ROAD Observatory (Chile) and 41-cm PROMPT-5 Telescope (CTIO, Chile) in BVRIU optical bands. Observations have been obtained at a good cadence over the last two months. The photometric observations were transformed into Gaia Synthetic Photometry (GaiaSP) for consistency. Detailed light curves and associated statistics of AT 2026fbz are presented on the webpage: https://bhtom.space/public/targets/ASASSN-26bl.

Data accessed through the BHTOM networkis subject to its Terms and Conditions available here. Public links to the light curves are provided here in the spirit of open science and collaborative research; full downloads are available to registered users upon creating a free account at BHTOM.

We share these resources because we believe in free data accessibility and the value of broad scientific collaboration. In return, we kindly ask that researchers who find these light curves useful to properly acknowledge the BHTOM project. Proper credit is essential to sustaining the collaborative spirit that makes this data possible.

Researchers planning to use these data are warmly encouraged to reach out to the BHTOM team in advance at contact@bhtom.space.

Acknowledgements: BHTOM.space is based on the open-source TOM Toolkit by LCO and has been supported by the European Union's research and innovation programmes under grant agreements No 101004719 (OPTICON-RadioNet Pilot, ORP) and 101131928 (ACME).