Orphan Gamma‐Ray Burst Radio Afterglows: Candidates and Constraints on Beaming

The number of orphan radio afterglows associated with gamma-ray bursts (GRBs) that should be detected by a flux-limited radio survey is calculated. It is shown that for jetted GRBs, this number is smaller for a smaller jet opening angle θ, contrary to naive expectation. For a beaming factor f ≡ (θ 2... View More