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		| Paper: | 
		TGCat, The Chandra Transmission Grating Catalog and Archive: Systems, Design and Accessibility | 
	 
	
		| Volume: | 
		434, Astronomical Data Analysis Software and Systems XIX | 
	 
	
		| Page: | 
		329 | 
	 
	
		| Authors: | 
		Mitschang, A. W.; Huenemoerder, D. P.; Nichols, J. S. | 
	 
	
	
		| Abstract: | 
		The recently released Chandra  Transmission Grating Catalog and Archive, TGCat, presents a fully dynamic on-line catalog allowing  users to browse and categorize Chandra gratings observations  quickly and easily, generate custom plots of resulting response  corrected spectra on-line without the need for special software and  to download analysis ready products from multiple observations in one convenient operation. TGCat has been registered as a VO resource  with the NVO providing direct access to the catalogs interface.  Catalog processing is automated in order to consistently have the  latest available products, and is massively scalable allowing rapid  reprocessing of catalog data. A unique feature of the catalog is that  all of the high level functions used to retrieve inputs from the Chandra archive and to generate the final data products are  available to the user in an ISIS written library with detailed documentation. Here we present a structural overview of the Systems, Design, and Accessibility features of the catalog and archive. | 
	 
	
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