X-ray study of mixed morphology SNR HB9

We propose two 60 ks observations of the large mixedmorphology supernovaremnant HB9. ROSAT observations detected a large, bright, clumpy region of Xrayemission towards the southeast of the remnant, with strong Xray emissiontowards the center and faint emission reaching the edge of the radio shell. HB9is thought to be interacting with a MC based on the detection of CO emissiontowards the northeast of the remnant. The clumpy nature and irregularity of theXray emission indicates an inhomogeneity of the presupernova medium and adensity gradient from the north to the south of the remnant. These proposedobservations will provide the first CCDquality Xray spectra from the remnant,allowing us to carry out a spatially resolved spectral analysis of the Xray emitting plasma in HB9. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]