I’m Guillaume, I was born in 1991 in Strasbourg (France) I spent all of my studies there and I joined the CALENDS team in Lyon for my master internship and with not so much hesitations for my PhD on the same subject. My passion for astronomy appeared with my first telescope nine years ago, and since this date this passion grows up each day of each year to lead me in astrophysical studies and did internships in astronomy on astrometry and X-ray binaries. But now I start my PhD on gravitational lensing.

One of a CALENDerS subject is to study distant sources. But before studying them, you have to find them, especially when you observe a lensing clusters. A lensing cluster is a group of galaxies, containing stars, gas and Dark Matter which deform enough the space-time to curve the path of light. To find them, with 2D images which are deeper and deeper, I would like to use the knowledge of lensing properties and galaxies in a new software which I developed and named MISE (for Multiple Images Searcher).

Indeed, sometimes in the core of clusters you have several images of the same source and I want to find them all. In addition, to find correctly these images you have to model your galaxy cluster, and this is the other big part of my PhD, because with this correct modelisation you can provide lots of constraints by example on the cosmology of our Universe.

Recently I produced a 2 minutes video (in French) about my PhD for the International year of light. You can find it here.