Evaluating the Potential to Constrain Dark Matter Annihilation with Fermi-LAT Observations of Ultrafaint Compact Stellar Systems - Circiello, Antonio; Mcdaniel, Alex; Drlica-Wagner, Alex; Karwin, Christopher; Ajello, Marco; Mauro, Mattia Di; Sanchez-Conde, Miguel a (Astrophysical Journal Letters, 2025)