Version 0.8.0

S-lang/ISIS Timing Analysis Routines (SITAR) Downloads

The downloads here are ascii files containing S-Lang subroutines and functions, suitable for running in ISIS or Sherpa. Only the main code needs to be downloaded for running in either ISIS or Sherpa. Downloading the GSL module from the S-Lang Modules Packages page provides additional statistical functionality for the Bayesian Blocks routine and for the epoch folding test. (See the descriptions of these individiual routines to learn more.)

The drivers represent worked examples that call additional subroutines (primarily for reading and plotting Chandra data) found in the example subroutines below.

Main Code

Save the appropriate file as sitar.sl. In ISIS, type either isis> ()=evalfile("sitar"); or

isis> require("sitar");

. In Sherpa type sherpa> ()=evalfile("sitar"). The subroutines will then be available for use. Note that the individual subroutines and functions have their own version numbers and they have headers describing their use.

SITAR Version 0.8.0

Example Subroutines

These routines are specific to the examples, as well as to the drivers below, and primarily deal with reading and plotting Chandra data. As such, you won't find any descriptive headers or version numbers. They can, however, serve as a useful starting point for customization by users. For the Bayesian Blocks example save the file as bblocks_examp.sl, and then after having loaded the above main code, type > ()=evalfile("bblocks_examp"); to make the subroutines available. These example subroutines will work in either ISIS or Sherpa.

Drivers

For those wishing to get a quick start. If you download the main code and example sub routines above, these drivers can then be used to run examples of the analysis. They will require a proper Chandra or ASM data file, and the input parameters will need to be custom edited. In ISIS, type isis> .load driver_name; or isis> ()=evalfile("driver_name");, and in Sherpa type sherpa> ()=evalfile("driver_name");, and then you're off to the races.

Note that there is only one set of drivers. They will work in either ISIS or Sherpa.

Data Files

These files can be found linked within the specific examples to which they pertain. However, for convenience I repeat the links here. Note: below is an old version of the Her X-1 ASM data file. An up-to-date version, plus many, many other sources, can be found on the ASM Data Products page.

This page was last updated Oct 15, 2007 by Michael Nowak. To comment on it or the material presented here, send email to mnowak@space.mit.edu.