COSI: From Calibrations and Observations to All-sky Images

Understand

The soft MeV gamma-ray sky, from a few hundred keV up to several MeV, is one of the least explored regions of the electromagnetic spectrum.

• The most promising technology to access this energy range is a telescope that uses Compton scattering to detect the gamma rays.
• Going from the measured data to all-sky images ready for scientific interpretation, however, requires a well-understood detector setup and a multi-step data-analysis pipeline.
• We have developed these capabilities for the Compton Spectrometer and Imager (COSI).