Likelihoods for the CTA sensitivity to a dark matter line signal from the Galactic centre (S. Abe et al., 2024])

We present likelihoods to estimate upper limits and detection prospects for monochromatic gamma-ray signals from DM pair-annihilation in the Galactic centre, based on the Cherenkov Telescope Array (CTA) consortium publication "Dark Matter Line Searches with the Cherenkov Telescope Array" by S. Abe et al. [arxiv:2403.04857]. These likelihoods are based on the analysis benchmark assumptions summarized in Table 3 of that publication. In particular, they assume an Einasto profile for the DM density distribution and 500 hrs of Galactic centre observations. We further supply likelihoods for the same analysis benchmark assumptions, but for an Einasto profile with an inner core of size 1 kpc.

As indicated by the filenames, the four files contain likelihoods for setting limits and claiming discovery, respectively. For more technical details, see the headers of these files.