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Issue A&A Volume 411, Number 1, November III 2003 Special letters issue on: first science with integral Page(s) L43 - L47 Section Letters DOI 10.1051/0004-6361:20031251

A&A 411, L43-L47 (2003)
DOI: 10.1051/0004-6361:20031251

Letter

Radiation environment along the INTEGRAL orbit measured with the IREM monitor

W. Hajdas¹, P. Bühler¹, C. Eggel¹, P. Favre^{2, 3}, A. Mchedlishvili¹ and A. Zehnder<sup>1

1</sup>  Paul Scherrer Institute (PSI), Laboratory for Astrophysics, 5232 Villigen PSI, Switzerland
²  INTEGRAL Science Data Centre, Ch. d'Écogia 16, 1290 Versoix, Switzerland
³  Observatoire de Genève, Ch. des Maillettes 51, 1290 Sauverny, Switzerland

(Received 16 July 2003 / Accepted 14 August 2003)

Abstract
The INTEGRAL Radiation Environment Monitor (IREM) is a payload supporting instrument on board the INTEGRAL satellite. The monitor continually measures electron and proton fluxes along the orbit and provides this information to the spacecraft on board data handler. The mission alert system broadcasts it to the payload instruments enabling them to react accordingly to the current radiation level. Additionally, the IREM conducts its autonomous research mapping the Earth radiation environment for the space weather program. Its scientific data are available for further analysis almost without delay.

Key words: plasmas -- radiation mechanisms: general -- atmospheric effects -- instrumentation: detectors -- sun: flares -- gamma rays: observations

Offprint request: W. Hajdas (PSI), wojtek.hajdas@psi.ch

© ESO 2003

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