cti.bat

• compiles all other cti programs
• assigns input and output directories
• assigns list of obsids to read in, and their chipsets
• calls cti.pro

cti.pro

• loops over all chips/nodes
• for each chip determines which obsids to read
• loops over all obsids for each chip, reads in fits files
• contains three sections, which have to be run separately:
  1. reads in fits files and cats together chip,pha,grade data, then calls calc,energyscale,plot pgms to calculate cti values for each chip/node.
  2. reads in fits files for each individual obsid and corrects it using cti data calculated by (1).
  3. reads in text data file for each obsid and overplots results for a sort of summary plot.

cticalc (1 and 2)

• plots spectra, fits peaks, finds centroids
• plots centroids vs row number
• fits line/curve for CTI
• writes file 'chipNnN_in.dat' with fits and 'chipNnN_out.dat' with CTI data.

cti_energyscale

• plots centroids vs. true line energy, FWHM vs. true line e.
• fits line to cent.vs.e. - this is the energy scale correction
• writes file 'chipNnN_gain.dat' with slope and int

ctiplot

• reads in cti data from cticalc output
• plots cti vs. centroid for the first 100 rows of the node
• fits a polynomial
• prints poly coefficients to 'cNnN_ctiplot.dat'

ctigaincorr (1 and 2)

• takes one obsid's fits file at a time and corrects it for CTI and energy scale using data read in from ctiplot and energyscale output.

plotcticorr

• makes a nice plot of all of the results from ctigaincorr so you can see how well the corrections worked.