Accelerated direct demodulation method for image reconstruction with spherical data from Hard X-ray Modulation Telescope

TL;DR

This paper introduces an accelerated direct demodulation method tailored for high-resolution, multi-dimensional data from the HXMT mission, significantly improving computational efficiency for image reconstruction.

Contribution

The paper presents a novel accelerated direct demodulation method specifically designed for HXMT data, enhancing computational speed over traditional approaches.

Findings

The new method reduces computation time for high-resolution data.

Simulations confirm the effectiveness of the accelerated approach.

Improved image reconstruction quality demonstrated.

Abstract

The hard X-ray modulation telescope mission HXMT is mainly devoted to performing an all-sky survey at 1 keV -- 250 keV with both high sensitivity and high spatial resolution. The observed data reduction as well as the image reconstruction for HXMT can be achieved by direct demodulation method (DDM). However the original DDM is computationally too expensive for multi-dimensional data with high resolution to employ for HXMT data. In this article we propose an accelerated direct demodulation method adapted for data from HXMT. Simulations are also presented to demonstrate this method.