AlmaClass

class astroquery.alma.AlmaClass

Bases: QueryWithLogin

Attributes Summary

TIMEOUT
USERNAME
archive_url
cycle0_table	Return a table of Cycle 0 Project IDs and associated UIDs.
datalink
sia
tap

Methods Summary

download_and_extract_files(urls[, delete, ...])	Given a list of tarball URLs, it extracts all the FITS files (or whatever matches the regex)
download_files(files[, savedir, cache, ...])	Given a list of file URLs, download them
get_cycle0_uid_contents(uid)	List the file contents of a UID from Cycle 0.
get_data_info(uids[, expand_tarfiles, ...])	Return information about the data associated with ALMA uid(s)
get_files_from_tarballs(downloaded_files[, ...])	Given a list of successfully downloaded tarballs, extract files with names matching a specified regular expression.
get_project_metadata(projectid[, cache])	Get the metadata - specifically, the project abstract - for a given project ID.
help([cache])	Return the valid query parameters
help_tap()
is_proprietary(uid)	Given an ALMA UID, query the servers to determine whether it is proprietary or not.
login([username, store_password, ...])	Login to the ALMA Science Portal.
query(*args, **kwargs)	Queries the service and returns a table object.
query_async(payload[, cache, public, ...])	Perform a generic query with user-specified payload
query_object(*args, **kwargs)	Queries the service and returns a table object.
query_object_async(object_name[, cache, ...])	Query the archive for a source name.
query_region(*args, **kwargs)	Queries the service and returns a table object.
query_region_async(coordinate, radius[, ...])	Query the ALMA archive with a source name and radius
query_sia([pos, band, time, pol, ...])	Use standard SIA2 attributes to query the ALMA SIA service.
query_tap(query[, maxrec])	Send query to the ALMA TAP.
retrieve_data_from_uid(uids[, cache])	Stage & Download ALMA data.
stage_data(uids[, expand_tarfiles, return_json])	Deprecated since version v0.4.1.

Attributes Documentation

TIMEOUT = 60

USERNAME = ''

archive_url = 'http://almascience.org'

cycle0_table

Return a table of Cycle 0 Project IDs and associated UIDs.

The table is distributed with astroquery and was provided by Felix Stoehr.

datalink

sia

tap

Methods Documentation

download_and_extract_files(urls, delete=True, regex='.*\\.fits$', include_asdm=False, path='cache_path', verbose=True)

Given a list of tarball URLs, it extracts all the FITS files (or whatever matches the regex)

Parameters:

urlsstr or list

A single URL or a list of URLs

include_asdmbool

Only affects cycle 1+ data. If set, the ASDM files will be downloaded in addition to the script and log files. By default, though, this file will be downloaded and deleted without extracting any information: you must change the regex if you want to extract data from an ASDM tarball

download_files(files, savedir=None, cache=True, continuation=True, skip_unauthorized=True)

Given a list of file URLs, download them

Note: Given a list with repeated URLs, each will only be downloaded once, so the return may have a different length than the input list

Parameters:

fileslist

List of URLs to download

savedirNone or str

The directory to save to. Default is the cache location.

cachebool

Cache the download?

continuationbool

Attempt to continue where the download left off (if it was broken)

skip_unauthorizedbool

If you receive “unauthorized” responses for some of the download requests, skip over them. If this is False, an exception will be raised.

get_cycle0_uid_contents(uid)

List the file contents of a UID from Cycle 0. Will raise an error if the UID is from cycle 1+, since those data have been released in a different and more consistent format. See http://almascience.org/documents-and-tools/cycle-2/ALMAQA2Productsv1.01.pdf for details.

get_data_info(uids, expand_tarfiles=False, with_auxiliary=True, with_rawdata=True)

Return information about the data associated with ALMA uid(s)

Parameters:

uidslist or str

A list of valid UIDs or a single UID. UIDs should have the form: ‘uid://A002/X391d0b/X7b’

expand_tarfilesbool

False to return information on the tarfiles packages containing the data or True to return information about individual files in these packages

with_auxiliarybool

True to include the auxiliary packages, False otherwise

with_rawdatabool

True to include raw data, False otherwise

Returns:

Table with results or None. Table has the following columns: id (UID),

access_url (URL to access data), content_length, content_type (MIME

type), semantics, description (optional), error_message (optional)

get_files_from_tarballs(downloaded_files, regex='.*\\.fits$', path='cache_path', verbose=True)

Given a list of successfully downloaded tarballs, extract files with names matching a specified regular expression. The default is to extract all FITS files

NOTE: alma now supports direct listing and downloads of tarballs. See get_data_info and download_and_extract_files

Parameters:

downloaded_fileslist

A list of downloaded files. These should be paths on your local machine.

regexstr

A valid regular expression

path‘cache_path’ or str

If ‘cache_path’, will use the astroquery.Alma cache directory (Alma.cache_location), otherwise will use the specified path. Note that the subdirectory structure of the tarball will be maintained.

Returns:

filelistlist

A list of the extracted file locations on disk

get_project_metadata(projectid, cache=True)

Get the metadata - specifically, the project abstract - for a given project ID.

help(cache=True)

Return the valid query parameters

help_tap()

is_proprietary(uid)

Given an ALMA UID, query the servers to determine whether it is proprietary or not.

login(username=None, store_password=False, reenter_password=False, auth_urls=['asa.alma.cl', 'rh-cas.alma.cl'])

Login to the ALMA Science Portal.

Parameters:

usernamestr, optional

Username to the ALMA Science Portal. If not given, it should be specified in the config file.

store_passwordbool, optional

Stores the password securely in your keyring. Default is False.

reenter_passwordbool, optional

Asks for the password even if it is already stored in the keyring. This is the way to overwrite an already stored passwork on the keyring. Default is False.

query(*args, **kwargs)

Queries the service and returns a table object.

Perform a generic query with user-specified payload

Parameters:

payloaddictionary

Please consult the help method

cachedeprecated

publicbool

True to return only public datasets, False to return private only, None to return both

sciencebool

True to return only science datasets, False to return only calibration, None to return both

legacy_columnsbool

True to return the columns from the obsolete ALMA advanced query, otherwise return the current columns based on ObsCore model.

Table with results. Columns are those in the ALMA ObsCore model

(see ``help_tap``) unless ``legacy_columns`` argument is set to True.

Returns:

tableA Table object.

query_async(payload, cache=None, public=True, science=True, legacy_columns=False, max_retries=None, get_html_version=None, get_query_payload=None, **kwargs)

Perform a generic query with user-specified payload

Parameters:

payloaddictionary

Please consult the help method

cachedeprecated

publicbool

True to return only public datasets, False to return private only, None to return both

sciencebool

True to return only science datasets, False to return only calibration, None to return both

legacy_columnsbool

True to return the columns from the obsolete ALMA advanced query, otherwise return the current columns based on ObsCore model.

Returns:

Table with results. Columns are those in the ALMA ObsCore model

(see help_tap) unless legacy_columns argument is set to True.

query_object(*args, **kwargs)

Queries the service and returns a table object.

Query the archive for a source name.

Parameters:

object_namestr

The object name. Will be resolved by astropy.coord.SkyCoord

cachedeprecated

publicbool

True to return only public datasets, False to return private only, None to return both

sciencebool

True to return only science datasets, False to return only calibration, None to return both

payloaddict

Dictionary of additional keywords. See help.

Returns:

tableA Table object.

query_object_async(object_name, cache=None, public=True, science=True, payload=None, **kwargs)

Query the archive for a source name.

Parameters:

object_namestr

The object name. Will be resolved by astropy.coord.SkyCoord

cachedeprecated

publicbool

True to return only public datasets, False to return private only, None to return both

sciencebool

True to return only science datasets, False to return only calibration, None to return both

payloaddict

Dictionary of additional keywords. See help.

query_region(*args, **kwargs)

Queries the service and returns a table object.

Query the ALMA archive with a source name and radius

Parameters:

coordinatesstr / astropy.coordinates

the identifier or coordinates around which to query.

radiusstr / Quantity, optional

the radius of the region

cacheDeprecated

Cache the query?

publicbool

True to return only public datasets, False to return private only, None to return both

sciencebool

True to return only science datasets, False to return only calibration, None to return both

payloaddict

Dictionary of additional keywords. See help.

Returns:

tableA Table object.

query_region_async(coordinate, radius, cache=None, public=True, science=True, payload=None, **kwargs)

Query the ALMA archive with a source name and radius

Parameters:

coordinatesstr / astropy.coordinates

the identifier or coordinates around which to query.

radiusstr / Quantity, optional

the radius of the region

cacheDeprecated

Cache the query?

publicbool

True to return only public datasets, False to return private only, None to return both

sciencebool

True to return only science datasets, False to return only calibration, None to return both

payloaddict

Dictionary of additional keywords. See help.

query_sia(pos=None, band=None, time=None, pol=None, field_of_view=None, spatial_resolution=None, spectral_resolving_power=None, exptime=None, timeres=None, publisher_did=None, facility=None, collection=None, instrument=None, data_type=None, calib_level=None, target_name=None, res_format=None, maxrec=None, **kwargs)

Use standard SIA2 attributes to query the ALMA SIA service.

Parameters:

Returns:

Results in pyvo.dal.SIAResults format.

result.table in Astropy table format

query_tap(query, maxrec=None)

Send query to the ALMA TAP. Results in pyvo.dal.TapResult format. result.table in Astropy table format

Parameters:

maxrecint

maximum number of records to return

retrieve_data_from_uid(uids, cache=True)

Stage & Download ALMA data. Will print out the expected file size before attempting the download.

Parameters:

uidslist or str

A list of valid UIDs or a single UID. UIDs should have the form: ‘uid://A002/X391d0b/X7b’

cachebool

Whether to cache the downloads.

Returns:

downloaded_fileslist

A list of the downloaded file paths

stage_data(uids, expand_tarfiles=False, return_json=False)

Deprecated since version v0.4.1: The stage_data function is deprecated and may be removed in a future version. Use get_data_info instead.

Obtain table of ALMA files

DEPRECATED: Data is no longer staged. This method is deprecated and kept here for backwards compatibility reasons but it’s not fully compatible with the original implementation.

Parameters:

uidslist or str

A list of valid UIDs or a single UID. UIDs should have the form: ‘uid://A002/X391d0b/X7b’

expand_tarfilesDEPRECATED

return_jsonDEPRECATED

Note: The returned astropy table can be easily converted to json through pandas: output = StringIO() stage_data(…).to_pandas().to_json(output) table_json = output.getvalue()

Returns:

data_file_tableTable

A table containing 3 columns: the UID, the file URL (for future downloading), and the file size