CANGAROO-III Search for Gamma Rays from Kepler's Supernova Remnant

TL;DR

This study used the CANGAROO-III telescope in 2005 to search for TeV gamma rays from Kepler's supernova remnant but found no significant signals, constraining theoretical models.

Contribution

First observational search for TeV gamma rays from Kepler's supernova remnant using CANGAROO-III, providing limits on gamma-ray flux predictions.

Findings

No significant gamma-ray excess detected

Set upper limits on gamma-ray flux from the remnant

Constraints on theoretical models of gamma-ray emission

Abstract

Kepler's supernova, discovered in October 1604, produced a remnant that has been well studied observationally in the radio, infrared, optical, and X-ray bands, and theoretically. Some models have predicted a TeV gamma-ray flux that is detectable with current Imaging Cherenkov Atmospheric Telescopes. We report on observations carried out in 2005 April with the CANGAROO-III telescope. No statistically significant excess was observed, and limitations on the allowed parameter range in the model are discussed.