CasdaClass

class astroquery.casda.CasdaClass(user=None, password=None)

Bases: astroquery.query.BaseQuery

Class for accessing ASKAP data through the CSIRO ASKAP Science Data Archive (CASDA). Typical usage:

result = Casda.query_region(‘22h15m38.2s -45d50m30.5s’, radius=0.5 * u.deg)

Attributes Summary

POLL_INTERVAL
TIMEOUT
URL

Methods Summary

download_files(urls[, savedir])	Download a series of files
filter_out_unreleased(table)	Return a subset of the table which only includes released (public) data.
query_region(*args, **kwargs)	Queries the service and returns a table object.
query_region_async(coordinates[, radius, ...])	Queries a region around the specified coordinates.
stage_data(table[, verbose])	Request access to a set of data files.

Attributes Documentation

POLL_INTERVAL = 20

TIMEOUT = 30

URL = 'https://casda.csiro.au/casda_vo_tools/sia2/query'

Methods Documentation

download_files(urls, savedir='')

Download a series of files

Parameters

urls: list of strings

The list of URLs of the files to be downloaded.

savedir: str, optional

The directory in which to save the files.

Returns

A list of the full filenames of the downloaded files.

filter_out_unreleased(table)

Return a subset of the table which only includes released (public) data.

Parameters

table: `astropy.table.Table`

A table of results as returned by query_region. Must include an obs_release_date column.

Returns

tableastropy.table.Table

The table with all unreleased (non public) data products filtered out.

query_region(*args, **kwargs)

Queries the service and returns a table object.

Queries a region around the specified coordinates. Either a radius or both a height and a width must be provided.

Parameters

coordinatesstr or astropy.coordinates.

coordinates around which to query

radiusstr or astropy.units.Quantity.

the radius of the cone search

widthstr or astropy.units.Quantity

the width for a box region

heightstr or astropy.units.Quantity

the height for a box region

get_query_payloadbool, optional

Just return the dict of HTTP request parameters.

cache: bool, optional

Use the astroquery internal query result cache

Returns

tableA Table object.

query_region_async(coordinates, radius=None, height=None, width=None, get_query_payload=False, cache=True)

Queries a region around the specified coordinates. Either a radius or both a height and a width must be provided.

Parameters

coordinatesstr or astropy.coordinates.

coordinates around which to query

radiusstr or astropy.units.Quantity.

the radius of the cone search

widthstr or astropy.units.Quantity

the width for a box region

heightstr or astropy.units.Quantity

the height for a box region

get_query_payloadbool, optional

Just return the dict of HTTP request parameters.

cache: bool, optional

Use the astroquery internal query result cache

Returns

responserequests.Response

The HTTP response returned from the service. All async methods should return the raw HTTP response.

stage_data(table, verbose=False)

Request access to a set of data files. All requests for data must use authentication. If you have access to the data, the requested files will be brought online and a set of URLs to download the files will be returned.

Parameters

table: `astropy.table.Table`

A table describing the files to be staged, such as produced by query_region. It must include an access_url column.

verbose: bool, optional

Should status message be logged periodically, defaults to False

Returns

A list of urls of both the requested files and the checksums for the files