M31 a040_048: MWhalo + MWhotHalo joint fit

Joint fit over all receipt-published MOS spectra (MOS1=25, MOS2=26); the model explicitly excludes SrcApec.

51all-ObsID MOS spectra

χ²=2277.39; dof=872; reduced χ²=2.612final fit statistic

3.0e-06–1.1e-04sb_flux y-axis

Model and display: LocalBubble + O VII + O VIII + Fe-L + MWabs*(CXB + MWhalo + MWhotHalo) + per-spectrum SoftProton; no SrcApec. Each spectrum's QPB is subtracted before grouping; grouping follows the XARTATOMS resolution-plus-net-S/N rule (net S/N ≥ 6, RMF FWHM oversampling ≤ 6).

The upper plot shows all data and errors in sb_flux (count s^-1 keV^-1 cm^-2 arcmin^-2), the final total model for each spectrum, the global sky components, and the per-spectrum detector-space soft-proton pseudo-SB. The shaded region is the MOS fit-excluded band 1.4–2.0 keV; the actual fitted range is 0.4–1.4 keV and 2.0–7.2 keV.

The lower plot is Δχ; error bars are 1σ. The global sky components are shown folded through one representative MOS response; the total model for each of the 51 responses is retained in the plot.

a040_048 all ObsID joint fit: data, model, components and Delta chi residuals

This page publishes only derived plots and the cleaned fit summary; it contains no PHA, QPB, ARF, RMF, event files, absolute data paths, or Sherpa session.