F. Valenzuela | Searcharxiv

arXiv2026

COLIBRI (SVOM/FM-GFT): Instrumentation and Performances on the SVOM Alerts

COLIBRI, the French Mexican Ground Followup Telescope (FM GFT) for SVOM, is a 1.3 meter rapid response optical facility specifically developed for prompt, multiband observations of GRB afterglows and for delivering subarcsecond localisations of optical counterparts for detailed followup studies. The telescope operates through a fully automated system that manages the entire workflow, from alert reception to counterpart identification. Commissioning results confirm that the telescope meets design specifications, and this paper presents a comprehensive performance assessment of the capabilities.

astro-ph.IM↗

arXiv2017

On the growth rate inequality for periodic points in the two sphere

Let $f:S^2\to S^2$ be a continuous map such that $deg f = d, |d|>1$. Suppose $f$ has two attracting fixed points denoted $N$ and $S$ and let $A=S^2\setminus \{N,S\}$. Assume that if a loop $γ\subset f^{-1}(A)$ is homotopically trivial in $A$, then $f(γ)$ is also homotopically trivial in $A$. Then, for all $n$, $f$ has at least $|d^n -1|$ fixed points.

math.DS↗