id	keyword
ap-9947	ray
ap-9947	gamma
ap-9947	survival
ap-9947	bursts
ap-9947	grbs
ap-9947	function
ap-9947	data
ap-9947	distribution
ap-9947	analysis
ap-9947	time
ap-9947	swift
ap-9947	ray bursts
ap-9947	astronomy
ap-9947	bagoly