Category:Isis / Slang

The Spectral Interpretation System (ISIS) was developed at MIT for the analysis of X-ray spectra.

This page is a copy from the old wiki. It does not show the content of a usual category page and has to be updated!

Before you start

ISIS history

You will make your ISIS-life A TON easier by setting up an ISIS history file that saves any interactive commands you use. They are usually automatically set on the Remeis-cluster, otherwise go to your .bashrc and use:

ISIS_HISTORY_FILE=/path_where_you_want_your_file_ususally_home/.isis_history export ISIS_HISTORY_FILE

Adapt for other shells accordingly.

ISISscripts

A huge (and extremely useful) collection of useful ISIS functions, written and maintained by the Remeis observatory (and certainly containing thousands of working hours by a variety of people) can be found here:

http://www.sternwarte.uni-erlangen.de/isis/

Please cite properly when used!

Instructions

Note that this page was just copy-pasted from the old wiki. This is only a short list of instructions that will be available. I do not think that a full list of all instructions should go here for the new wiki, I'm trying to find another solution for that. In the end, I think only the instructions to get isis running and first steps should be here. I will move all the advanced stuff like defining models, timing tools, etc. somewhere else.

• Introduction for the bachelor students
• ISIS Tutorial (X-ray astronomy lecture 2012)
• Plotting with the S-Lang Xfig module, instructions and examples
• Define your own models in ISIS
• Questions and Answers
• README file for using/.../changing the ISISscripts
• Use timing tools with ISIS
• Parallel Error Calculation using MPI and SLmpi
• fake an observation with isis
• fit a curve to a 2D data set via parameterized polynomials
• Simultaneous Fits of a large number of observations
• fitting equivalent widths directly
• emcee - the Markov-Chain-Monte-Carlo hammer
• install on a MAC OS X (10.10 yosemite) - fresh
• Quickly generate a LaTeX table of spectral parameters with uncertainties

Important/Useful ISIS functions

• Spectral Analysis
• Timing Analysis
• Plotting with SLxfig
• Uncertainties & Contours
• Debugging & Programming

S-Lang tips & tricks

• S-Lang modules (function packages)
• writing helps for functions
• functions within structures
• function nesting
• self-value-management
• changing qualifiers before passing them on
• speed up code
  • iterating over an array - three different for-loops
  • ternary operator ?:
  • profile - Run-time profiler: Analyses (nested) function run-times
• passing information to a fit function via metadata
• References to variables