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| Paper: |
Virtual Observatory Interfaces to the Chandra Data Archive |
| Volume: |
485, Astronomical Data Analysis Software and Systems XXIII |
| Page: |
313 |
| Authors: |
Tibbetts, M.; Harbo, P.; Van Stone, D.; Zografou, P. |
| Abstract: |
The Chandra Data Archive (CDA) plays a central role in the operation of
the Chandra X-ray Center (CXC) by providing access to Chandra data.
Proprietary interfaces have been the backbone of the CDA throughout the
Chandra mission. While these interfaces continue to provide the depth
and breadth of mission specific access Chandra users expect, the CXC has
been adding Virtual Observatory (VO) interfaces to the Chandra proposal catalog and observation catalog. VO interfaces provide standards-based
access to Chandra data through simple positional queries or more complex
queries using the Astronomical Data Query Language. Recent development
at the CDA has generalized our existing VO services to create a suite of
services that can be configured to provide VO interfaces to any dataset.
This approach uses a thin web service layer for the individual VO
interfaces, a middle-tier query component which is shared among the VO
interfaces for parsing, scheduling, and executing queries, and existing web services for file and data access. The CXC VO services provide
Simple Cone Search (SCS), Simple Image Access (SIA), and Table Access
Protocol (TAP) implementations for both the Chandra proposal and
observation catalogs within the existing archive architecture. Our work
with the Chandra proposal and observation catalogs, as well as
additional datasets beyond the CDA, illustrates how we can provide
configurable VO services to extend core archive functionality. |
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