On the Angular Resolution of Pair-Conversion $\gamma$-Ray Telescopes

Abstract

I present a study of the several contributions to the single-photon angular resolution of pair telescopes in the MeV energy range. I examine some test cases, the presently active {\sl Fermi} LAT, the ``pure-silicon'' projects ASTROGAM and AMEGO-X, and the emulsion-based project GRAINE.

Presented to Session 14 "Future spaceborne MeV detectors and related astrophysics'' of the 2023 International Conference of Deep Space Sciences, April 2023, Hefei, China