Gamma Ray Bursts and Black Holes

GRB

On February 2 NASA’s satellite, Swift, was hit by cosmic gamma rays. This triggered an alert and seconds later University of WA’s Zadko Telescope swung into robotic action to take images and record the entire evolution of the event. The event appeared as a rapid brightening visible in the sky for a brief period of time. Its brightness was equivalent to millions of stars shining together from the same location. What was actually detected is known as a Gamma Ray Burst.

Greek Press Release about the AHEAD’s planetarium movie winning the Golden Star Award at the international fulldome film competition!!

award

  ΔΕΛΤΙΟ ΤΥΠΟΥ   Το πρόγραμμα AHEAD (Integrated Activities in the High–Energy Astrophysics Domain) του Εθνικού Αστεροσκοπείου Αθηνών είναι στην ευχάριστη θέση να ανακοινώσει ότι η ταινία θόλου, με τίτλο «The Hot and Energetic Universe» και σκηνοθέτη τον Θεοφάνη Ματσόπουλο, Read More …

Analyzing an image taken with an X-ray telescope

bkg_noise

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.