My CXC support work is primarily on the specification and test of the software tools for processing high-resolution X-rays spectra obtained with the Chandra High Energy Transmission Grating Spectrograph (HETGS) or the Low Energy Transmission Grating Spectrograph (LETGS).
CIAO ToolsSome specific CIAO tools for which I have been responsible are:
Work in ProgressEnhancements are under way (as of September 2005) to generalize and improve the region filtering in tg_resolve_events and tg_extract to provide larger and asymmetric background regions, and variable source and/or background region widths. This entails polygonal sky regions for the filter input to tg_resolve_events, and polygonal region files in diffraction coordinates for binning with tgextract.
The figure shows an example of asymmetric regions (to avoid HEG-MEG background-region overlap) with non-constant-width.
Calibration Database Files for AnalysisIn addition, I have defined and constructed calibration database (CALDB) files required for the data processing and for effective area computation. Some of these are:
This page was last updated Nov 16, 2017 by David P. Huenemoerder. To comment on it or the material presented here, send email to firstname.lastname@example.org.