PROGRAMMATIC ACCESS

The Programmatic Access to science data products allows the user to perform more complex queries (ADQL) and download data from scripts programmed and run locally which also ensure for long/repetitive sequences of queries. Here you can find an overview on gain programmatic and tool access to the archive science portal utilising the standard interfaces provided by the International Virtual Observatory (VO) Alliance. 

The use of VO standards and protocols makes the ESO SAF data discoverable through VO services and tools, which is considered a high level requirement. The standalone tools have powerful generic and/or specific capabilities that cannot be implemented in a general web interface. 

Have also a look at the TAP access page to science data products and to catalogues.


If you need help or you have any feedback on accessing and downloading data in a programmatic way, please have a look at the DEMO page or leave a comment here. 

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Access to Spectroscopic Data: Example #1

Archive Science Group 2 weeks ago updated 2 weeks ago 0

HAlha

The currently contains more than 1.7 million spectra stored in an homogeneous database.

These exquisite quality spectra can be accessed via the Archive Science Portal V2 or programmatically.

For instance, you can follow this notebook to create the image on the right. This shows the Hα line profile as observed with MUSE (red, with a resolution R~3000), XSHOOTER (blue, R~10000), and UVES (green, R~100000) how the star HD 172230. This star is part of the MUSE library of stellar spectra project (Ivanov et al. 2019).

More notebooks showing the power of the programmatic access are here.

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Access to Catalogues: Example #1

Archive Science Group 1 month ago updated 1 month ago 0

VIKING

Several catalogues are available in the ESO Archive containing a variety of information ranging from photometry of sources extracted from imaging data products, redshifts and additional physical parameter from spectra, weak lensing shear measurements, etc.

These catalogues can be accessed via the web query interface or programmatically.

For instance, you can follow this notebook to create the image on the right, showing the distribution of point (blue) and extended (red) sources in the colour-colour plane obtained from the VISTA Kilo-degree Infrared Galaxy Survey (VIKING).

More notebooks showing the power of the programmatic access are here.

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