Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...452..145k&link_type=abstract
Astrophysical Journal v.452, p.145
Astronomy and Astrophysics
Astronomy
30
Gamma Rays: Bursts
Scientific paper
Gamma-ray burst time histories often consist of multiple episodes of emission with the count rate dropping to the background level between adjacent episodes. We define precursor activity as any case in which the first episode (referred to as the precursor episode) has a lower peak intensity than that of the remaining emission (referred to as the main episode) and is separated from the remaining burst emission by a background interval that is at least as long as the remaining emission. We find that ˜3% of the bursts observed with the Burst and Transient Source Experiment (BATSE) on Compton Gamma Ray Observatory (CGRO) satisfy this definition. We present the results of a study of the properties of these events. The spatial distribution of these sources is consistent with that of the larger set of all BATSE gamma-ray bursts: inhomogeneous and isotropic. A correlation between the duration of the precursor emission and the duration of the main episode emission is observed at about the 3 σ confidence level. We find no meaningful significant correlations between or among any of the other characteristics of the precursor or main episode emission. It appears that the characteristics of the main episode emission are independent of the existence of the precursor emission.
Briggs Michael Stephen
Fishman Gerald J.
Koshut Thomas Michael
Kouveliotou Chryssa
Meegan Charles A.
No associations
LandOfFree
Gamma-Ray Burst Precursor Activity as Observed with BATSE does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gamma-Ray Burst Precursor Activity as Observed with BATSE, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gamma-Ray Burst Precursor Activity as Observed with BATSE will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1352790