Structure in the Diffuse X-ray Background Along the Galactic Plane

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

A satisfactory explanation for the observed structure of the diffuse Galactic X-ray background has been elusive. It has been suggested that the soft ( ~ 0.25 keV) component is emission from the Local Hot Bubble (LHB) while several components may contribute to the hard ( ~ 0.5-2.0 keV) emission which is observed to be uncorrelated with Galactic latitude. We have begun a program which will utilize the archival ROSAT PSPC data to analyze both the soft and the hard components of the diffuse Galactic X-ray emission. We will mosaic some 60 pointed observations along the Galactic plane covering more than a 100 degree(2) region between lII = 0(deg) and lII = 30(deg) and |bII | <= 3(deg). The average exposure over this field is ~ 15,000 sec. We will present some of the early work we have carried out for a small region of the total field and describe the procedures we will employ in the subsequent program. Early results from some selected small regions will be discussed.

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