The Compton Spectrometer and Imager

• DOI: 10.48550/arxiv.2308.12362
• Publication Date: 2023-01-01
• Authors: Tomsick, John; Boggs, Steven; Zoglauer, Andreas; Hartmann, Dieter; Ajello, Marco; Burns, Eric; Fryer, Chris; Karwin, Chris; Kierans, Carolyn; Lowell, Alexander; Malzac, Julien; Roberts, Jarred; Saint-Hilaire, Pa...; Shih, Albert; Siegert, Thomas; Sleator, Clio; Takahashi, Tadayuki; Tavecchio, Fabrizio; Wulf, Eric; Beechert, Jacqueline; Gulick, Hannah; Joens, Alyson; Lazar, Hadar; Neights, Eliza; Oliveros, Juan Ca...; Matsumoto, Shigeki; Melia, Tom; Yoneda, Hiroki; Amman, Mark; Bal, Dhruv; von Ballmoos, Peter; Bates, Hugh; Böttcher, Markus; Bulgarelli, Andrea; Cavazzuti, Elisab...; Chang, Hsiang-Kuang; Chen, Claire; Chu, Che-Yen; Ciabattoni, Alex; Costamante, Luigi; Dreyer, Lente; Fioretti, Valentina; Fenu, Francesco; Gallego, Savitri; Ghirlanda, Giancarlo; Grove, Eric; Huang, Chien-You; Jean, Pierre; Khatiya, Nikita; Knödlseder, Jürgen; Krause, Martin; Leising, Mark; Lewis, Tiffany; Lommler, Jan Peter; Marcotulli, Lea; Martinez-Castella...; Mittal, Saurabh; Negro, Michela; Nussirat, Samer Al; Nakazawa, Kazuhiro; Oberlack, Uwe; Palmore, David; Panebianco, Gabriele; Parmiggiani, Nicolo; Parsotan, Tyler; Rogers, Field; Pike, Sean; Schutte, Hester; Sheng, Yong; Smale, Alan; Smith, Jacob; Trigg, Aaron; Venters, Tonia; Watanabe, Yu; Zhang, Haocheng
• Keywords: [SDU] Sciences of the Universe [physics]; High Energy Astrophysical Phenomena (astro-ph.HE); [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]; 13. Climate action; Instrumentation and Methods for Astrophysics; FOS: Physical sciences; [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]; Physics and Society; Astrophysics - High Energy Astrophysical Phenomena; Astrophysics - Instrumentation and Methods for Astrophysics; 7. Clean energy; Instrumentation and Methods for Astrophysics (astro-ph.IM); High Energy Astrophysical Phenomena

The Compton Spectrometer and Imager (COSI) is a NASA Small Explorer (SMEX) satellite mission in development with a planned launch in 2027. COSI is a wide-field gamma-ray telescope designed to survey the entire sky at 0.2-5 MeV. It provides imaging, spectroscopy, and polarimetry of astrophysical sources, and its germanium detectors provide excellent energy resolution for emission line measurements. Science goals for COSI include studies of 0.511 MeV emission from antimatter annihilation in the Galaxy, mapping radioactive elements from nucleosynthesis, determining emission mechanisms and source geometries with polarization measurements, and detecting and localizing multimessenger sources. The instantaneous field of view for the germanium detectors is >25% of the sky, and they are surrounded on the sides and bottom by active shields, providing background rejection as well as allowing for detection of gamma-ray bursts and other gamma-ray flares over most of the sky. In the following, we provide an overview of the COSI mission, including the science, the technical design, and the project status.<br/>8 pages<br/>