SPI Measurements of the Diffuse Galactic Hard X-ray Continuum

Details SPI Measurements of the Diffuse Galactic Hard X-ray Continuum SPI Measurements of the Diffuse Galactic Hard X-ray Continuum

2004-05-03

arxiv.org/abs/astro-ph/0405023v2

Astronomy and Astrophysics

Astrophysics

Proceedings of the 5th INTEGRAL Workshop, Munich 16-20 February 2004. ESA SP-552. Reference to Terrier et al. (2004) updated t

Scientific paper

INTEGRAL Spectrometer SPI data from the first year of the Galactic Centre Deep Exposure has been analysed for the diffuse continuum from the Galactic ridge. A new catalogue of sources from the INTEGRAL Imager IBIS has been used to account for their contribution to the celestial signal. Apparently diffuse emission is detected at a level ~10% of the total source flux. A comparison of the spectrum of diffuse emission with that from an analysis of IBIS data alone shows that they are consistent. The question of the contribution of unresolved sources to this ridge emission is still open.

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