The superior burst location capability of the COMPTEL instrument aboard the Compton Gamma-Ray Observatory allows us to study the small-scale angular distribution of burst sources with good sensitivity even though the number of burst detections is small. We accumulate four years (April 1991–April 1995) of observations to form a catalog of 27 burst locations whose mean 1σ uncertainty is ∼1°. We find that the COMPTEL bursts are consistent with an isotropic distribution of sources, yet the spatial coincidence of two of the bursts within COMPTEL’s angular resolution indicates the possibility of repetition. This possibility is studied using the two-point angular correlation function and the nearest neighbor statistic. Model dependent upper limits on the fraction of repeating sources are derived.
AIP Conference Proceedings
Digital Object Identifier (DOI)
The angular distribution of COMPTEL Gamma-Ray bursts Kippen, R. M. and Ryan, J. and Connors, A. and McConnell, M. and Hartmann, D. H. and Winkler, C. and Hanlon, L. O. and Schönfelder, V. and Greiner, J. and Varendorff, M. and Collmar, W. and Hermsen, W. and Kuiper, L., AIP Conference Proceedings, 384, 436-440 (1996), DOI:http://dx.doi.org/10.1063/1.51697
© 1996 American Institute of Physics