Analyzing an image taken with an X-ray telescope

A very important process in observational astronomy is to carefully subtract the background noise from an image taken by an X-ray telescope. This background noise may come from background photons, i.e., photons not associated with the source that is being observed or artefacts from the telescope itself. For that purpose, scientists develop software tools that are used to analyse observations taken by X-ray telescopes.

Chandra 7Ms: A new X-ray source catalogue

Astronomers took advantage of Chandra satellite’s unprecedented X-ray sensitivity, to create a new X-ray source catalogue. This new catalogue will help scientists investigate how Supermassive Black Holes (SMBHs) grow and co-evolve with galaxies and examine how the X-ray binary populations of starburst and normal galaxies evolve over most of cosmic time, among other exciting things.