ISIS Usage Examples

Tutorial Examples

• Adding plus- and minus- order grating spectra
• Computing the line spectrum from a single ion
• Fitting CCD data
• Computing chi-square confidence contours
• FITS bintable I/O
• Simulating the effects of photon pileup in CCDs. The Chandra ABC guide to pileup may also be of interest.
• Simulating the HETG spectrum of an X-ray Binary for Chandra proposal planning
• Computing collisional ionization equilibrium models for analyzing high-resolution X-ray spectra.
• A very simple parallel script using the built-in support for parallel processing.

Advanced Examples

• Distributed computation of single-parameter confidence limits
• Fitting He-like triplet line ratios
• Analysis of coupled sources via combine_datsets.
• Multi-Order analysis of Chandra LETG/HRC data
  (script to compute matched RMFs)
  (Chandra data overlaid with an APED model: script, plot)
  (a simulated power-law observation: script, plot1, plot2)
• Monte-Carlo fit-parameter search (script)
• Generating an input spectrum for a MARX simulation (script)
• Clearing event-file status bits (script)
• User-defined fit-functions (this is an elaborate example)

More Examples

• Mike Nowak has written a detailed introduction to ISIS for XSPEC users
• A recent ADASS paper gives a few examples in which the PVM module was used to speed up relatively routine but very CPU-intensive data analysis tasks using ISIS.
• A summary of John Davis's pileup analysis from the 2002 HEAD meeting
• Pileup correction for low pileup fractions
• HETGS line profile analysis
• User-contributed examples (old).