Concept study of a small Compton polarimeter to fly on a cubesat
Yi-Chi Chang1*, Chien-Ying Yang1, Hung-Hsiang Liang1, Che-Yen Chu1, Jeng-Lun Chiu2, Chih-Hsun Lin3, Yuan-Hann Chang4, Hsin-Chia Lin2, Chen-Joe Fong2, Philippe Laurent5, Hsiang-Kuang Chang1,6
1Institute of Astronomy, National Tsing Hua University, Hsinchu, Taiwan
2National Space Organization, National Applied Research Labs, Hsinchu, Taiwan
3Institute of Physics, Academia Sinica, Taipei, Taiwan
4Department of Physics, National Central University, Chongli, Taiwan
5Laboratoire APC, UMR 7164, CEA/DSM CNRS Universite ́e Paris Diderot, Paris, France
6Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
* Presenter:Yi-Chi Chang,
Application of cubesats in astronomical observations has been getting more and more mature in recent years. Here we report a concept study of a small Compton polarimeter to fly on a cubesat for observing polarization of soft gamma-rays from a black-hole X-ray binary, Cygnus X-1. Polarization states provide very useful diagnostics on the emission mechanism and the origin of those gamma rays. In our study, we conducted Monte Carlo simulations to decide the basic design of this small polarimeter. Silicon detectors and cerium bromide scintillators were employed in this study. We estimated its on-axis effective area at different energies and its data telemetry requirement when flying in a low earth orbit. Based on this study, we will proceed to have a more realistic design and look for opportunities of a cubesat space mission.

Keywords: Cubesat, Astronomical instrumentation, MeV gamma-ray astronomy, Compton telescopes