HRC-S Calibration Data Products - Pre-fix
15 May 1998 - "slight" changes to fits filesPostscript file describing data products.
Table of Contents
QE, Gain Maps, etc.
Degap
Background Map
HRC-S Out-of-Band QE and Effective Area
Spatial Scale
Count Rate Linearity
Point Spread Function
HRC-S Geometry
References
fits(binary) - qe map
dgp.img(binary) - degapped flat field image (displayed by SAOimage using -u2 flag)
128.dgp.img(binary) - degapped 128 x 128 flat field image (displayed by SAOimage using -u2 flag)
dgp.gmi(binary) - degapped gain map image (displayed by SAOimage using -u2 flag)
prj(ascii) - image projections
pha(ascii) - pulse height distribution
dgp(ascii) - degap parameters
In order to download the files, hold down the "Shift" key and click on the file.
Ascii files may be displayed by merely clicking on them.
The data is an accumulation of all flat field data taken with that segment. 4 pulse height bins have been used to generate pulse height dependent degaps, i.e. pre_fix0.0.img is the raw flat field image for segment 0 for all pulse heights in the first quartile (viz.,1/4 of the counts) of the pulse height distribution, pre_fix0.1.img is the raw flat field image for segment 0 for all pulse heights in the second quartile of the pulse height distribution, etc. and pre_fix0.img, the raw image for all pulse heights.
img(binary) - raw flat field image (displayed by SAOimage using -u2 flag)
dgp.img(binary) - degapped flat field image (displayed by SAOimage using -u2 flag)
prj(ascii) - image projections
pha(ascii) - pulse height distribution
dgp(ascii) - degap parameters
In order to download the files, hold down the "Shift" key and click on the file.
Ascii files may be displayed by merely clicking on them.
pre_fix_bkdmap.fits (Background fits file from data taken at the XRCF)
Units are counts per second in the resolution element (128x128 larger than basic HRC-S resolution element).
In order to download the file, hold down the "Shift" key and click on the file.
HRC-S Out-of-Band QE and Effective Area
A model of the HRC-S MCP EUV-Visible quantum efficiency. A table of values for the model is provided.
A model of the HRC-S EUV - Visible transmission for segments -1 and +1 under the thin (300 A) aluminum coating. The model is based on a witness sample (TF100-565) measurement (3200-8000A) and linear attenuation coefficients from the literature.
Table hrcso_uvt.prn
A model of the HRC-S EUV - Visible quantum efficiency for segments -1 and +1 under the thin (300 A) aluminum coating. The boxes are two measurements at 2537 and 4400 A. A table of values for the model is provided.
A model of the HRC-S EUV - Visible Effective Area for segments -1 and +1 under the thin (300 A) aluminum coating. A HRMA collecting area of 1100 cm2 has been assumed (constant over the band). A table of values for the model is provided.
V axis: 6.429 microns per pixel
U axis: 6.250 microns per pixel
Count rate linearity at Carbon K alpha (277 eV). The solid line is the best fit line, if the fit is forced through the origin. The dashed line is the best fit line, if the fit is not forced through the origin. The count rate linearity was determined by measuring the HRC-S rate as a function of the BND-H rate (proportional to the incident flux density).
See also Count Rate Linearity of the AXAF High Resolution Camera (HRC), D. Pease and H. Donnelly (postscript file) or HTML file).
Surface plot of the point spread function of the combined HRC-S and HRMA at Carbon K alpha (277 eV).
Best fit Gaussians to slices of the PSF (at 277 eV) along the U and V axes through the peak.
Encircled energy versus radius of the HRC-S/HRMA at 277 eV. (postscript file)
PSF (HRMA + HRC-S) at 0.277 keV (fits file)
PSF (HRMA + HRC-S) at 2.56 keV (fits file)
In order to download the files, hold down the "Shift" key and click on the file
Normalized surface brightness (HRMA + HRC-S) at 0.277 and 2.56 keV (postcript file)
Encircled energy (HRMA + HRC-S) at 0.277 keV (ascii file)
Encircled energy (HRMA + HRC-S) at 2.56 keV (ascii file)
Each encircled table contains four columns. The first column is the pixel number from the center pixel (defined as the pixel with the most counts), the second column is the encircled energy at that distance, the third column is the total number of counts in that annular bin, and the fourth column is the normalized surface brightness (NSB) of that bin (effectively it is the number of counts in the bin divided by the solid angle of the bin and the counts in the central pixel). Each pixel in these tables is 6.249 microns
Ascii files may be displayed by merely clicking on them.
A SPIE paper gives details of the measurement procedures, analysis techniques, and results of the XRCF and flat field calibrations.
How to display postscript plots with the Netscape browser.