Reason for Change
Attempts by the GRB_refinement task to analyze data for bursts outside the FOV (off-axis angle > 70) fail when the event selection returns zero photons.
Test Procedure
Tested in dev on data in /ASP/TestSims2 and on flight data in the prod datacatalog that exhibited this issue.
Rollback Procedure
Revert to ASP v2r11p1