IRSA Image Server
The IRSA Image Server provides low-level, program friendly methods for querying astronomical image metadata tables, including support for the IVOA's Simple Image Access protocol, Simple Spectral Access protocol, and Table Access Protocol . Images, image cutouts, and spectra are available for direct download (e.g. via wget or curl), and are laid out in browsable directories.
Visit the following links to browse the available data and for in-depth explanations of how to use this service:
| Link | Description |
|---|---|
| IVOA Simple Image Access (SIA) v2 queries | Search imaging products served by IRSA using Virtual
Observatory-based program-friendly commands. Query to retrieve metadata columns or a list of image URLs that satisfy a variety of possible constraints. |
| IVOA Simple Spectral Access (SSA) queries | Search spectral products served by IRSA using Virtual
Observatory-based program-friendly commands. Query to retrieve metadata columns or a list of spectra URLs that satisfy a variety of possible constraints. |
| Image cutouts | Given a list of image URLs (e.g. the output of an SIA query), retrieve a cutout from that image. |
| IVOA Table Access Protocol (TAP) queries | Search catalogs served by IRSA using Virtual
Observatory-based program-friendly commands. Query a specified catalog to retrieve the rows that satisfy a variety of possible constraints. |
| Metadata schemas | List of information available for each of IRSA's image and spectral data sets. |
| Browse data | IRSA's images and spectra, laid out in browsable directories. |
| Constructing URLs for WISE, 2MASS, and PTF | Browse for documentation for getting WISE, 2MASS, and PTF data |
Getting Help
If you've run into a problem, think you've found a bug, or simply have questions, please contact IRSA User Support.