Assertion: gamma ray's wavelength | /r/CreatedBy | collision
Facets:
value: between the burst ejecta
type: OTHER
value: between interstellar gas
type: LOCATION
Source sentences:
text: Several models for the origin of gamma-ray bursts postulated that the initial burst of gamma rays should be followed by slowly fading emission at longer wavelengths created by collisions between the burst ejecta and interstellar gas.