The Compton Spectrometer and Imager Project for MeV Astronomy
Document Type
Conference Proceeding
Publication Date
3-18-2022
Abstract
The Compton Spectrometer and Imager (COSI) is a 0.2-5 MeV Compton telescope capable of imaging, spectroscopy, and polarimetry of astrophysical sources. Such capabilities are made possible by COSI's germanium cross-strip detectors, which provide high efficiency, high resolution spectroscopy and precise 3D positioning of photon interactions. 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, and detecting and localizing multimessenger sources. The instantaneous field of view (FOV) 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 or other gamma-ray flares over >50% of the sky. We have completed a Phase A concept study to consider COSI as a Small Explorer (SMEX) satellite mission, and here we discuss the advances COSI-SMEX provides for astrophysics in the MeV bandpass.
Publication Source (Journal or Book title)
Proceedings of Science
Recommended Citation
Tomsick, J., Boggs, S., Zoglauer, A., Wulf, E., Mitchell, L., Phlips, B., Sleator, C., Brandt, T., Shih, A., Roberts, J., Jean, P., von Ballmoos, P., Oliveros, J., Smale, A., Kierans, C., Hartmann, D., Leising, M., Ajello, M., Burns, E., Fryer, C., Saint-Hilaire, P., Malzac, J., Tavecchio, F., Fioretti, V., Bulgarelli, A., Ghirlanda, G., Chang, H., Takahashi, T., Nakazawa, K., Matsumoto, S., Melia, T., Siegert, T., & Lowell, A. (2022). The Compton Spectrometer and Imager Project for MeV Astronomy. Proceedings of Science, 395 Retrieved from https://repository.lsu.edu/physics_astronomy_pubs/6663