INTEGRAL: In flight behavior of ISGRI and SPI

F. Lebrun (1, 2) , J.-P. Roques (3) , A. Sauvageon (2) , R. Terrier (1, 2) , Philippe Laurent (1) , O. Limousin (2) , F. Lugiez (4) , A. Clareta (2)

1 APC (UMR_7164) - AstroParticule et Cosmologie
2 DAP - Département d'Astrophysique (ex SAP)
3 CESR - Centre d'étude spatiale des rayonnements
4 DEDIP - Département d'Electronique, des Détecteurs et d'Informatique pour la Physique (ex SEDI)

The payload of INTEGRAL, the space gamma-ray observatory launched in October 2002, features two gamma-ray telescopes that take advantage of the semiconductor technologies. The spectrometer SPI, is equipped with 19 high-purity germanium detectors cooled at 85 K. We will report on the SPI in-flight background, performance, the detector evolution and the annealings performed every 6 months. The INTEGRAL Soft Gamma-Ray Imager (ISGRI) is the low-energy camera of the IBIS telescope. It is the first large camera equipped with CdTe detectors. We will present some system aspects, in particular the noisy pixel handling and will report on its in-flight background, performance and their evolution.

Mots clés: Cooled germanium detectors; Room temperature semiconductors; Gamma-ray astronomy; Asics; Space environment

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Astrophysique [astro-ph]

F. Lebrun, J.-P. Roques, A. Sauvageon, R. Terrier, Philippe Laurent, et al.. INTEGRAL: In flight behavior of ISGRI and SPI. Development and Application of Semiconductor Tracking Detectors (STD 5), Jun 2004, Hiroshima, Japan. pp.323-331, ⟨10.1016/j.nima.2005.01.072⟩. ⟨in2p3-00179327⟩