Suzaku wide-band observations of SN 1006

TL;DR

This paper presents Suzaku's wide-band X-ray observations of SN 1006, successfully resolving thermal and nonthermal emissions, revealing a spectral roll-off, and providing the most stringent high-energy flux upper limits.

Contribution

It demonstrates Suzaku's capability to distinguish thermal and nonthermal X-ray emissions in SN 1006 and characterizes the spectral roll-off at 0.23 keV.

Findings

Nonthermal emission requires a roll-off at 0.23 keV.

Higher roll-off frequency in the northeastern rim.

Stringent upper limit on flux above 10 keV.

Abstract

We report on the wide band spectra of SN 1006 as observed by Suzaku. Thermal and nonthermal emission are successfully resolved thanks to the excellent spectral response of Suzaku's X-ray CCD XIS. The nonthermal emission cannot be reproduced by a simple power-law model but needs a roll-off at 5.7$\times 10^{16}$ Hz = 0.23 keV. The roll-off frequency is significantly higher in the northeastern rim than in the southwestern rim. We also have placed the most stringent upper limit of the flux above 10 keV using the Hard X-ray Detector.