High Energy Afterglow Emission from Gamma-Ray Bursts
نویسندگان
چکیده
We calculate the very high energy (sub-GeV to TeV) inverse Compton emission of GRB afterglows. We argue that this emission provides a powerful test of the currently accepted afterglow model. We focus on two processes: synchrotron self-Compton (SSC) emission within the afterglow blast wave, and external inverse Compton (EIC) emission which occurs when flare photons (produced by an internal process) pass through the blast wave. We show that if our current interpretations of the Swift XRT data are correct, there should be a canonical high energy afterglow emission light curve. Our predictions can be tested with high energy observatories such as GLAST, Whipple, H.E.S.S., MAGIC and Kangaroo. Under favorable conditions we expect afterglow detections in all these detectors.
منابع مشابه
Letter to the Editor Observations of the soft gamma-ray early afterglow emission from two bright gamma-ray bursts
We present the results of observations of the soft gamma-ray early afterglows with the energy above 100 keV from two bright Gamma-ray bursts detected by the PHEBUS instrument of the GRANAT orbital observatory. We show that the light curves of GRB 910402 and GRB 920723 events present the afterglow emission with fading fluxes. During our observations (∼ 700 s) for these gamma-ray bursts the after...
متن کاملObservations of the Soft Gamma-Ray early Afterglow emission from Two Bright Gamma-ray Bursts
We present the results of observations of the soft gamma-ray early afterglows with the energy above 100 keV from two bright Gamma-ray bursts detected by the PHEBUS instrument of the GRANAT orbital observatory. We show that the light curves of GRB 910402 and GRB 920723 events present the afterglow emission with fading fluxes. During our observations (∼ 700 s) for these gamma-ray bursts the after...
متن کاملAfterglow Emission from Naked Gamma-ray Bursts
We calculate the afterglow emission for Gamma-Ray Bursts (GRBs) going off in an extremely low density medium, referred to as naked bursts. Our results also apply to the case where the external medium density falls off sharply at some distance from the burst. The observed afterglow flux in this case originates at high latitudes, i.e. where the angle between the fluid velocity and the observer li...
متن کاملPossible Effects of Pair Echos on Gamma-Ray Burst Afterglow Emission
High-energy emission from gamma-ray bursts (GRBs) is highly expected but had been sparsely observed until recently when the Fermi satellite was launched. We investigate how pair echo emission affects spectra and light curves of high energy afterglow, considering not only prompt emission but also afterglow as the primary emission. Detection of pair echos is possible as long as the intergalactic ...
متن کاملCorrelations of Prompt and Afterglow Emission in Swift Long and Short Gamma Ray Bursts
Correlation studies of prompt and afterglow emissions from gamma-ray bursts (GRBs) between different spectral bands has been difficult to do in the past because few bursts had comprehensive and intercomparable afterglow measurements. In this paper1 we present a large and uniform data set for correlation analysis based on bursts detected by the Swift mission. For the first time, short and long b...
متن کاملVHE γ-ray Afterglow Emission from Nearby GRBs
Gamma-ray Bursts (GRBs) are among the potential extragalactic sources of very-high-energy (VHE) γ-rays. We discuss the prospects of detecting VHE γ-rays with current ground-based Cherenkov instruments during the afterglow phase. Using the fireball model, we calculate the synchrotron self-Compton (SSC) emission from forward-shock electrons. The modeled results are compared with the observational...
متن کامل