The Chandra Grating-Data Archive and Catalog (TGCat
grating spectra easily viewable and accessible. The browse-able
interface to analysis-quality spectral products (binned spectra and
corresponding response files), with the addition of summary
graphical products and model-independent flux properties tables make
it easy to find observations of a particular object, type of object,
or type of observation, to quickly assess the quality and potential
usefulness of the spectra, and to download the data and responses as
In addition to the data, portable reprocessing scripts, using CXC
and other publicly available
(which were used to create
the archive) are also available, facilitating standard or
customized reprocessing from Level 1 archive data to spectra and
responses with minimal interaction.
In addition to standard products for single point-sources, we will
add custom extractions of more complex sources, such as close or
extended sources, and we will provide some aggregate products from
multiple observations of the same object.
TGCat development was directed by David Huenemoerder, who is also
responsible for reprocessing scripts. Arik Mitschang is responsible
for design and implementation of the database and web interface.
For ongoing support, review, and testing we thank John Davis, Dan
Dewey, John Houck, Herman Marshall, Doug Morgan, Joy Nichols, Mike
Noble, Mike Nowak, and Norbert Schulz.
If you use TGCat in your research, we would appreciate an
acknowledgment (until we have a literature citation), such as:
"This research made use of the Chandra Transmission Grating
Catalog and archive (http://tgcat.mit.edu)."