The examples here have just really scratched the surface of the
capabilities of ISIS. As described in the
there's lots of very useful stuff that it can do with the APEC
database. There's also all sorts of 'advanced methods' for setting up
data and models. For example, one can assign multiple responses to
the data (e.g., multiple gratings orders for HRC-LETG data). You can
combine data sets (see the
.help file for the ISIS command
combine_datasets - a more general way of combining data than
adding their spectra and averaging there responses outside of the
analysis package). The latter can be used to model sources that are
very close together on a detector image, i.e., where one expects their
spectra to 'overlap', etc.
Here are some other web-pages that describe and utilize advanced ISIS features
- TGCat - the Transmission Gratings
Catalog. TGCat is a searchable archive of all Chandra Gratings
observations. It provides an overview of source properties,
interactive plotting, and downloads of processed, archived spectra.
The analysis and plots were all generated with ISIS, and the
interactive plotting uses a version of the custom ISIS plot routines
found on these pages.
A suite of
S-lang routines from Dave
Huenemoerder to perform timing analysis on Chandra gratings data.
- SITAR - A
S-lang routines to perform timing analysis, including the
ability to define an averaged, binned Power Spectrum as an ISIS
dataset, suitable for fitting.
Software from Dave Huenemoerder,
much of it dealing with the analysis of Chandra gratings data.
- MIT/CXC S-lang Modules
- Various modules, all runnable and scriptable from ISIS, including
parallelized computation of
ISIS fit models across a heterogeneous network of machines,
visualization of data cubes,
3D spectral model
definition and visualization, etc.
Forward folding & comparison of 3D models with 2D event data, by
Hanke's ISIS Page - Manfred maintains a nice set of links to useful
software, including a very extensive set of
scripts. (Note that these scripts share some of the code presented
on this web site, so be careful if downloading both!
S-lang will let
you overwrite function definitions!) These pages also point toward a
GIT repository of
useful ISIS scripts. Dig through there, and you'll find all sorts of
Need further help and guidance? Send your questions to the ISIS users e-mail list: firstname.lastname@example.org.