file: $CALDBaciscal/docs/cmp_config.txt, v0.1, 1999-06-15 dd


$CALDBaciscal Measurement Products
==================================

Item: bi_ratio_uni_N19980918 (directory)
 contains 32 files: w[134|140]c4r_<target>_[qesum.summary|ratio_uni.fits]
  where <target> = [c|cu|f|fe55|o|p|si|ti]
Include Date: 1999-06-15
Source: Created by ACIS/MIT group, provided via Norbert Schulz to CXC.
Description: (taken from the file header:)
  This FITS file contains a 32 x 32-pixel image showing the spatial       
  uniformity, relative to a reference CCD, of the quantum detection       
  efficiency of an ACIS CCD that has true dimensions of 1024 x 1024       
  pixels.  The value of each pixel in the image is the ratio of the       
  number of counts accumulated in a 32 x 32-pixel subarray of the CCD     
  being tested to the number of counts in the same subarray of the        
  reference CCD.  The data were obtained during subassembly calibration   
  in the CCD Lab at the MIT Center for Space Research.  Information       
  about any corrections made for cosmetic defects and shadowing by the    
  framestore covers is given in the FITS headers of the raw uniformity    
  maps.  This map was produced in IDL.  A more detailed description of    
  the contents is given in the Relative Efficiency Measurements section   
  of the ACIS Calibration Report.        
Created by: ACIS/MIT group.
Creation date: 1998-09-18 is listed in file header.
See: -