3 papers
astro-ph.GA2026
Polarization echoes from past nuclear activity in the quasi-periodic eruption source GSN 069
B. AgÃs-González, D. Hutsemékers, I. Liodakis +8
Context. X-ray quasi-periodic eruptions (QPEs) are repeating, high-amplitude, soft X-ray bursts observed from the nuclei of a dozen nearby low-mass galaxies. Their origin remains a…
astro-ph.GA2025
A new type-1 transition in NGC 1346 revealed by (spectro)polarimetry
F. Marin, D. Hutsemékers, S. Jorstad
We present the first photo- and spectropolarimetric observations of the changing-look active galactic nucleus NGC~1346 taken with the Perkins telescope (November 2022, March 2025)…
astro-ph.EP2025
Snapshot of a new interstellar comet: 3I/ATLAS has a red and featureless spectrum
Cyrielle Opitom, Colin Snodgrass, Emmanuel Jehin +19
The interstellar comet 3I/ATLAS is only the third interstellar object to be discovered. Pre-perihelion measurements provide a unique opportunity to study its activity and compositi…