Published in "Extragalactic Background Radiation", Space Telescope Science Institute Symposium Series 7, 1995, eds. D. Calzetti, M. Livio and P. Madau


EXTRAGALACTIC GAMMA-RAY BACKGROUND

Neil Gehrels and Cynthia Cheung


NASA/Goddard Space Flight Center Greenbelt, MD 20771


Abstract. We review the observational data of the extragalactic gamma-ray background obtained before the launch of the Compton Gamma Ray Observatory and the theoretical interpretations. We also summarize the latest AGN observations by Compton which pertain to the origin of the extragalactic gamma-ray background and their implications.


Table of Contents

INTRODUCTION

LOW-ENERGY MEASUREMENTS (0.1-10 MeV)
Spectral Characteristics
Spatial Characteristics

INTERPRETATION OF LOW-ENERGY GRB SPECTRUM

HIGH-ENERGY MEASUREMENTS OF GRB (>10 MeV)

INTERPRETATION OF HIGH-ENERGY GRB SPECTRUM
GRB from Proton-Antiproton Annihilation
GRB from Primordial Blackholes

COMPTON RESULTS AND IMPLICATIONS FOR GRB
Compton Observations of AGN
Implications for GRB

OTHER TOPICS
TeV Observations and Constraints on IR Background
GRB from Type Ia SN

REFERENCES

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