The Compton Spectrometer and Imager

John Tomsick,Steven Boggs,Andreas Zoglauer,Dieter H. Hartmann,Marco Ajello,Eric Burns,Chris Fryer, Chris Karwin,Carolyn Kierans,Alex Lowell, Julien Malzac,Jarred Roberts, Pascal Saint-Hilaire, Albert Shih,Thomas Siegert,Clio Sleator, Tadayuki Takahashi, Fabrizio Tavecchio,Eric Wulf,Jacqueline Beechert, Hannah Gulick, Alyson Joens,Hadar Lazar, Eliza Neights, Juan Carlos Martinez Oliveros, Shigeki Matsumoto, Tom Melia, Hiroki Yoneda,Mark Amman, Dhruv Bal,Peter von Ballmoos, Hugh Bates, Markus Böttcher, Andrea Bulgarelli, Elisabetta Cavazzuti,Hsiang-Kuang Chang, Claire Chen, Che-Yen Chu, Alex Ciabattoni, Luigi Costamante, Lente Dreyer, Valentina Fioretti, Francesco Fenu, Savitri Gallego, Giancarlo Ghirlanda,Eric Grove, Chien-You Huang,Pierre Jean, Nikita Khatiya, Jürgen Knödlseder, Martin Kraus,Mark Leising, Tiffany Lewis, Jan Lommler, Lea Marcotulli, Israel Martinez Castellanos, Saurabh Mittal, Michela Negro, Samer Al Nussirat, Kazuhiro Nakazawa, Uwe Oberlack, David Palmore, Gabriele Panebianco, Nicolò Parmiggiani, Sean Pike, Field Rogers, Hester Schutte, Yong Sheng,Alan Smale, Jacob Russell Smith, Aaron Trigg, Tonia Venters, Yu Watanabe, Haocheng Zhang

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)（2023）

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摘要

In this Astro2020 APC White Paper, we describe a Small Explorer (SMEX) mission concept called the Compton Spectrometer and Imager. COSI is a Compton telescope that covers the bandpass often referred to as the "MeV Gap" because it is the least explored region of the whole electromagnetic spectrum. COSI provides a significant improvement in sensitivity along with high-resolution spectroscopy, enabling studies of 511 keV electron-positron annihilation emission and measurements of several radioactive elements that trace the Galactic history of supernovae. COSI also measures polarization of gamma-ray bursts (GRBs), accreting black holes, and pulsars as well as detecting and localizing multimessenger sources. In the following, we describe the COSI science, the instrument, and its capabilities. We highlight many Astro2020 science WPs that describe the COSI science in depth.

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