Chandra Grating Efficiencies Based on Ground Calibration Data

Details Chandra Grating Efficiencies Based on Ground Calibration Data Chandra Grating Efficiencies Based on Ground Calibration Data

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.4306r&link_type=abstract

American Astronomical Society, HEAD Meeting #5, #43.06; Bulletin of the American Astronomical Society, Vol. 32, p.1260

Astronomy and Astrophysics

Astronomy

Scientific paper

Prior to launch, the Chandra X-ray Observatory underwent comprehensive calibration at the NASA X-ray Calibration Facility (XRCF, Marshall Space Flight Center). We present results of a final analysis of these calibration data for the Low and High Energy Transmission Gratings (LETG and HETG), as well as for the High Resolution Mirror Assembly (HRMA). Detailed source spectra for each combination of x-ray source anode and filter were derived from imaging-detector/grating data. Results from simulations using the MARX ray-trace suite were then used to account for finite-aperture-size and window-bowing effects in the focal-plane flow proportional counters (FPCs) used to collect the grating efficiency data. After these adjustments were applied and the relative strength of each line within the complex was determined, the FPC JMKMOD model for the XSPEC spectral fitting program was used to fit data from focal-plane and beam-monitor detectors. In this way, best-fit parameters for the different instrument configurations were derived, yielding measurements of the HRMA effective area and LETG and HETG diffraction efficiencies over a broad spectral range. Although measurements of 0th and 1st order grating efficiencies comprise the bulk of the data, extensive information was also obtained on higher-order diffraction. P. Ratzlaff, B.J. Wargelin, J.J. Drake, C.O. Johnson and D. Pease were supported by Chandra X-ray Center NASA contract NAS8-39073.

Affiliated with

Also associated with

No associations

Rating

Chandra Grating Efficiencies Based on Ground Calibration Data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Chandra Grating Efficiencies Based on Ground Calibration Data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chandra Grating Efficiencies Based on Ground Calibration Data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-873542