DRAFT
2025-11-18 12:02:11
Type: Object/s-Data/Analysis
Bibcode: 2025TNSAN.324....1B
LCO observations of AT 2025adje (ASASSN-25et), a bright supernova candidate in PGC 047292, at a redshift of z = 0.00796
Authors: P.G. Berdayes, J. Basurto Merino, A. Caballero-Almagro, A. Cerón, M. Contreras, F. Díaz-Segado, T. Ferrer-Laviña, B. Gandolfi, V. Ghiraldo, J. Hernández Fung, L. Juliá-Maroto, E. Lekaroz-Urriza, M. Manzano García, E. Mejía-Martínez, J. Prieto Polo, M. Pulido-Torres, M. Quintana-Ansaldo, A. Schenone-Zanuzzi, A. Selezneva, T. Tundidor Rodríguez, E. Urquijo-Rodríguez (all ULL), M. Abdul-Masih (IAC and ULL), and I. Pérez-Fournon (IAC and ULL)
Source Group: ULL-ASTRO-MASTER
Keywords: Transient, Supernova, Optical
Abstract:
We report on Las Cumbres Observatory (LCO) observations of the bright supernova candidate AT 2025adje, discovered by ASAS-SN (ASASSN-25et) after seasonal break and located close to the galaxy PGC 047292, at a redshift of z = 0.00796 +/- 0.000001 (from the FAST all sky H I survey (FASHI), Zhang+, 2024).

The bright supernova candidate AT 2025adje (ASASSN-25et) has been recently discovered by ASAS-SN and reported to TNS by K. Z. Stanek for the ASAS-SN team 
(TNS Astronomical Transient Report No. 27672). This transient is located close to the galaxy PGC 047292, at a redshift of 0.00796 +/- 0.000001 (from the FAST all sky H I survey (FASHI), Zhang+, 2024).

We observed AT 2025adje with one of the two Las Cumbres Observatory (LCO) 40-cm telescopes (Planewave Delta Rho 350 telescopes equipped with QHY600 CMOS cameras) located at the LCO node at Haleakala Observatory (Maui, Hawaii).  We obtained 60-sec exposures in each of the SDDS g', r', and i' filters. The bright transient is clearly detected in the three filters. We measure the following magnitudes (AB), calibrated  against PanSTARRS-1 DR2 stars and not corrected for galactic extinction:

g'  = 14.57 +/- 0.06, 2025-11-16 15:40:54 UT

r' = 14.74 +/- 0.10, 2025-11-16 15:42:01 UT

i' =  14.86 +/- 0.11, 2025-11-16 15:43:09 UT

We encourage follow-up multi-wavelength observations.

Based on observations made with the Las Cumbres Observatory’s education network telescopes that were upgraded through generous support from the Gordon and Betty Moore Foundation (LCO program IAC2025B-010). These observations are part of a course in Astrophysical Techniques of the Master in Astrophysics of the Astrophysics 
Department of the University of La Laguna in collaboration with the Instituto de Astrofísica de Canarias  (La Laguna, Tenerife, Canary Islands, Spain).
 

Show current TNS values
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2025adje [ASASSN-25et] 13:28:48.718 +38:44:48.12 WISEA J132849.14+384442.4 13:28:48.658 +38:44:47.39 SN II 0.00796
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AT2025adje_ULL-ASTRO-MASTER_LCO_g_16Nov2025_0.png ULL-ASTRO-MASTER LCO imaging of Las Cumbres Observatory (LCO) imaging of AT 2025adje

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