A High Spectral Resolution Study of the Soft X-ray Background with the X-ray Quantum Calorimeter


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We present here a combined analysis of four high spectral resolution observations of the Diffuse X-ray Background (DXRB), made using the University of Wisconsin-Madison/Goddard Space Flight Center X-ray Quantum Calorimeter (XQC) sounding rocket payload. The observed spectra support the existence of a $sim0.1~$keV Local Hot Bubble and a $sim0.2~$keV Hot Halo, with discrepancies between repeated observations compatible with expected contributions of time-variable emission from Solar Wind Charge Exchange (SWCX). An additional component of $sim0.9~$keV emission observed only at low galactic latitudes can be consistently explained by unresolved dM stars.

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