Crude Limits on Prior and Prompt Optical Emission from GRBs from CONCAMs of the Night Sky Live Global Network

摘要

The developing global Night Sky Live network of nighttime fisheye web-cameras (CONtinuous CAMeras or CONCAMs) monitors much of the night sky down to a limiting visual magnitude as faint as 7. Several times now, a CONCAM has imaged the position of a gamma-ray burst (GRB) at trigger time. So far, however, no optical transient has been bright enough to be recorded by a CONCAM. Several example cases are discussed.