Science Results from More Than 9 Years of Measurements from CALET on the International Space Station

ORAL

Abstract

The Calorimetric Electron Telescope (CALET) continues to collect excellent data after over nine years of operation on the International Space Station since October 2015. CALET was designed to measure the spectra of the highest-energy electrons and positrons through the TeV energy decade to search for nearby sources and/or signatures of dark matter processes, as well as measure the spectra of the hadronic components up to a PeV. Secondary science goals include measuring the relative abundances of the ultra-heavy galactic cosmic rays (UHGCRs) above Z=28 (nickel) that probe the processes involved in cosmic-ray acceleration and propagation in the galaxy. The CALET calorimeter is also sensitive to GeV-energy gamma rays and is being used to study persistent and transient astrophysical sources, the galactic center excess, and to search for signatures of dark matter. The CALET Gamma-Ray Burst Monitor (CGBM) also monitors the sky for X-ray and soft gamma-ray transients, including in connection with gravitational wave events. Additionally, CALET has made significant space weather measurements, having demonstrated sensitivity to events in observations of variability in the flux of geomagnetically trapped particles, especially using on-board measurements of precipitating electrons.

*In Japan, this work was supported in part by JSPS KAKENHI Grant Numbers 26220708, 19H05608, 17H02901, 21K03592, and 20K22352 and by the MEXT-Supported Program for the Strategic Research Foundation at Private Universities (2011-2015) (No.S1101021) at Waseda University. The CALET effort in Italy is supported by ASI under agreement 2013-018-R.0 and its amendments. The CALET effort in the United States is supported by NASA through Grants NNX16AC02G, NNX16AB99G, NNX11AE06G, 80NSSC20K039, and 80NSSC24K1883.

Presenters

  • Brian F Rauch

    • Washington University, St. Louis

Authors

  • Brian F Rauch

    • Washington University, St. Louis