29 July 2015 to 6 August 2015
World Forum
Europe/Amsterdam timezone

Fermi-LAT Measurement of Cosmic-ray Proton Spectrum

31 Jul 2015, 15:00
15m
Amazon (World Forum)

Amazon

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution CR-EX Parallel CR06 Dir p He

Speaker

Mr David Michael Green (UMD/NASA)

Description

The Pass 8 gamma-ray simulation and reconstruction package for the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope has dramatically enhanced the ability of the LAT to perform gamma-ray science. The Pass 8 improvements have also allowed for the development of a new cosmic-ray proton analysis. Using the new Pass 8 direction and energy reconstruction, we create a new proton event selection. This event selection has an acceptance of 1 $m^2$ sr over the incident proton energy range from 20 GeV to over 1 TeV. This event selection applied to over 6 years of LAT observations provides high statistics for a spectral measurement. The systematic errors in the acceptance and energy reconstruction require careful study. The event selection and spectral measurement of the Pass 8 proton analysis opens the door to additional proton analyses with the LAT, such as the evaluation of proton anisotropy. We present a detailed study of the measurement of the cosmic-ray proton spectrum with Pass 8 data for the Fermi-LAT.
Registration number following "ICRC2015-I/" 989
Collaboration FERMI

Primary author

Mr David Michael Green (UMD/NASA)

Co-author

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