Paper 14145-140
Paper 14145-140
Cryogenic optical test plan for the visible and near-infrared telescope MONSTER onboard HiZ-GUNDAM satellite
6 July 2026 • 17:30 - 19:00 CEST | Room B4-M3
Abstract
The HiZ-GUNDAM mission is dedicated to time-domain and multi-messenger astronomy focusing on gamma-ray bursts (GRBs). It is designed to deliver rapid alerts of high-redshift GRBs with photometric redshift provided by MONSTER, a 30-cm visible and near-infrared telescope onboard the satellite. After launch at ambient temperature, MONSTER is cooled to <200 K and its near-infrared detector to <120 K via radiative cooling, enabling high sensitivity in the near-infrared. The telescope employs an athermal design using a single aluminum alloy, ensuring uniform thermal contraction and stable image performance across temperatures. To validate this concept, a breadboard model (BBM) of MONSTER has been built for cryogenic optical testing. Beginning in April 2026, we plan to cool the BBM to operational temperature and conduct optical performance evaluations. This presentation summarizes the current development status of MONSTER, with emphasis on preparations for the BBM cryogenic optical tests.
Presenter
Tokyo City Univ. (Japan)
Kohji Tsumura is an associate professor in the Department of Natural Science at Tokyo City University. He earned his BS degree in science from Tohoku University in 2005, followed by his MS and PhD degrees in science from the University of Tokyo in 2007 and 2010, respectively. From 2010 to 2014, he engaged in postdoctoral research at the Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA). He then served as an assistant professor at the Frontier Research Institute for Interdisciplinary Sciences at Tohoku University from 2014 to 2019. He has been involved in multiple space-based visible and infrared missions, including CIBER, CIBER-2, AKARI, HAYABUSA-2, VERTECS, and HiZ-GUNDAM. He is a member of SPIE.