EmdsClass

class astroquery.esa.emds.EmdsClass(auth_session=None, tap_url=None)

Bases: EsaTap

EMDS TAP client (multi-mission / multi-schema).

EMDS provides access to multiple missions through a single TAP service. Mission data are organised under different TAP schemas. This client offers a small convenience layer to work with mission-specific tables while reusing the standard TAP utilities.

Set the session, alternative TAP url, initial parameter for the TAP connection

Parameters:

auth_sessionpyvo.auth.authsession.AuthSession, optional, default None

Authentication session to manage login

tap_urlstr, optional, default None

In case an alternative URL for the TAP needs to be defined

Returns:

A list of table objects

Attributes Summary

ESA_ARCHIVE_NAME
LOGIN_URL
LOGOUT_URL
REQUEST_PARAMETERS
TAP_URL
THRESHOLD	Class to init ESA TAP Module to communicate with {ESA_ARCHIVE_NAME} Science Archive
TIMEOUT
cache_location
tap	Initialize {ESA_ARCHIVE_NAME} TAP connection

Methods Summary

__call__(*args, **kwargs)	init a fresh copy of self
clear_cache()	Removes all cache files.
create_cone_search_query(ra, dec, ra_column, ...)
download_products(products, *[, path, ...])	Download all products from a table returned by get_products().
get_job(jobid)	Returns the job corresponding to an ID from ISLA TAP.
get_job_list(*[, phases, after, last, ...])	Returns all the asynchronous jobs stored in ISLA TAP.
get_metadata(table)	Gets the specified table from ISLA TAP
get_observations(*[, target_name, ...])	Query the observation catalogue for this mission.
get_products(*[, target_name, coordinates, ...])	Retrieve data products given a Taget Name, coordinates and/or some filters
get_table(table)	Gets the specified table from ISLA TAP
get_tables(*[, only_names])	Return the tables available for this mission.
list_missions()	Retrieve the list of missions available in the EMDS ObsCore view.
login(*[, user, password])	Performs a login in ISLA TAP.
logout()	Performs a logout in ISLA TAP.
query_table(table_name, *[, columns, ...])	Query a set of columns from a specific table in ISLA TAP, using filters defined by the user
query_tap(query, *[, async_job, ...])	Launches a synchronous or asynchronous job to query the ISLA TAP
reset_cache_location()	Resets the cache location to the default astropy cache

Attributes Documentation

ESA_ARCHIVE_NAME: str = 'ESA Multi-Mission Data Services (EMDS)'

LOGIN_URL: str = 'https://emds.esac.esa.int/service/login'

LOGOUT_URL: str = 'https://emds.esac.esa.int/service/logout'

REQUEST_PARAMETERS = {}

TAP_URL: str = 'https://emds.esac.esa.int/service/tap'

THRESHOLD = 1e-05

Class to init ESA TAP Module to communicate with {ESA_ARCHIVE_NAME} Science Archive

Subclasses must define:

ESA_ARCHIVE_NAME: str TAP_URL: str LOGIN_URL: str LOGOUT_URL: str TIMEOUT (Optional) = 60 REQUEST_PARAMETERS = {} THRESHOLD = 1e-5

TIMEOUT = 60

cache_location

tap

Initialize {ESA_ARCHIVE_NAME} TAP connection

Returns:

A TAPService object connected to {ESA_ARCHIVE_NAME} TAP

Methods Documentation

__call__(*args, **kwargs)

init a fresh copy of self

clear_cache()

Removes all cache files.

create_cone_search_query(ra, dec, ra_column, dec_column, radius)

download_products(products, *, path='', cache=False, cache_folder=None, verbose=False, params=None)

Download all products from a table returned by get_products().

Parameters:

productsTable

Table returned by get_products(). The table must contain the access_url and obs_publisher_did columns.

pathstr, optional

Local directory where the downloaded files will be stored. If not provided, files are downloaded to the current working directory. Ignored if cache=True.

cachebool, optional

If True, store the downloaded files in the Astroquery cache. Default is False.

cache_folderstr, optional

Subdirectory within the Astroquery cache where files will be stored. Only used if cache=True.

verbosebool, optional

If True, print progress messages during download. Default is False.

paramsdict, optional

Additional parameters passed to the HTTP request.

Returns:

list of str

List of local file paths for the downloaded products.

get_job(jobid)

Returns the job corresponding to an ID from ISLA TAP. Note that the user must be able to see the job in the current security context.

Parameters:

jobidstr, mandatory

ID of the job to view

Returns:

JobSummary corresponding to the job ID

get_job_list(*, phases=None, after=None, last=None, short_description=True)

Returns all the asynchronous jobs stored in ISLA TAP. Note that the user must be able to see the job in the current security context.

Parameters:

phaseslist of str

Union of job phases to filter the results by.

afterdatetime

Return only jobs created after this datetime

lastint

Return only the most recent number of jobs

short_descriptionflag - True or False

If True, the jobs in the list will contain only the information corresponding to the TAP ShortJobDescription object (job ID, phase, run ID, owner ID and creation ID) whereas if False, a separate GET call to each job is performed for the complete job description

Returns:

A list of Job objects

get_metadata(table)

Gets the specified table from ISLA TAP

Parameters:

tablestr, mandatory

full qualified table name (i.e. schema name.table name)

Returns:

A table object

get_observations(*, target_name=None, coordinates=None, radius=1.0, columns=None, get_metadata=False, output_file=None, **filters)

Query the observation catalogue for this mission.

This method queries the mission-specific observation catalogue configured for this client and returns observation-level metadata as an Astropy table. Queries can be restricted using a cone search (by target name or coordinates) and additional column-based filters.

Parameters:

target_name: str, optional

Name of the target to be resolved against SIMBAD/NED/VIZIER

coordinates: str or SkyCoord, optional

coordinates of the center in the cone search

radius: float or quantity, optional, default value 1 degree

radius in degrees (int, float) or quantity of the cone_search

columnsstr or list of str, optional, default None

Columns from the table to be retrieved. They can be checked using get_metadata=True

get_metadatabool, optional, default False

Get the table metadata to verify the columns that can be filtered

output_filestr, optional, default None

file name where the results are saved. If this parameter is not provided, the jobid is used instead

**filtersstr, optional, default None

Filters to be applied to the search. The column name is the keyword and the value is any value accepted by the column datatype. They will be used to generate the SQL filters for the query. Some examples are described below, where the left side is the parameter defined for this method and the right side the SQL filter generated: obs_collection=”EPSA” -> obs_collection = ‘EPSA’ target_name=”AT 2023%” -> target_name ILIKE ‘AT 2023%’ dataproduct_type=[“img”, “pha”] -> dataproduct_type = ‘img’ OR dataproduct_type = ‘pha’ dataproduct_type=[“img”, “pha”] -> dataproduct_type IN (‘img’, ‘pha’) t_min=(“>”, 60000) -> t_min > 60000 s_ra=(80, 82) -> s_ra >= 80 AND s_ra <= 82

Returns:

An astropy.table containing the query results, or the metadata table when get_metadata=True

get_products(*, target_name=None, coordinates=None, radius=1.0, get_metadata=False, **filters)

Retrieve data products given a Taget Name, coordinates and/or some filters

This method queries the mission product catalogue and returns product-level information. It ensures that the obs_publisher_did and access_url columns required for downloading products are included in the results.

Parameters:

target_name: str, optional

Name of the target to be resolved against SIMBAD/NED/VIZIER

coordinates: str or SkyCoord, optional

coordinates of the center in the cone search

radius: float or quantity, optional, default value 1 degree

radius in degrees (int, float) or quantity of the cone_search

get_metadatabool, optional, default False

Get the table metadata to verify the columns that can be filtered

**filtersstr, optional, default None

Filters to be applied to the search. The column name is the keyword and the value is any value accepted by the column datatype. They will be used to generate the SQL filters for the query. Some examples are described below, where the left side is the parameter defined for this method and the right side the SQL filter generated: obs_collection=”EPSA” -> obs_collection = ‘EPSA’ target_name=”AT 2023%” -> target_name ILIKE ‘AT 2023%’ dataproduct_type=[“img”, “pha”] -> dataproduct_type = ‘img’ OR dataproduct_type = ‘pha’ dataproduct_type=[“img”, “pha”] -> dataproduct_type IN (‘img’, ‘pha’) t_min=(“>”, 60000) -> t_min > 60000 s_ra=(80, 82) -> s_ra >= 80 AND s_ra <= 82

Returns:

astropy.table.Table

get_table(table)

Gets the specified table from ISLA TAP

Parameters:

tablestr, mandatory

full qualified table name (i.e. schema name + table name)

Returns:

A table object

get_tables(*, only_names: bool = False)

Return the tables available for this mission.

By default, only tables belonging to the mission-specific schema(s) are returned. Set only_names=True to return table names instead of table objects.

Parameters:

only_namesbool, optional

If True, return table names as strings. If False, return table objects.

Returns:

list

Table names (str) if only_names=True, otherwise table objects.

list_missions()

Retrieve the list of missions available in the EMDS ObsCore view.

This method returns the distinct values of the obs_collection field from the ivoa.ObsCore view, where obs_collection typically identifies the mission or data collection associated with each observation.

Returns:

astropy.table that contains the distinct mission identifiers present in ObsCore.

login(*, user=None, password=None)

Performs a login in ISLA TAP. TAP+ only User and password shall be used

Parameters:

userstr, mandatory, default None

Username. If no value is provided, a prompt to type it will appear

passwordstr, mandatory, default None

User password. If no value is provided, a prompt to type it will appear

logout()

Performs a logout in ISLA TAP. TAP+ only

query_table(table_name, *, columns=None, custom_filters=None, get_metadata=False, async_job=False, output_file=None, output_format='votable', **filters)

Query a set of columns from a specific table in ISLA TAP, using filters defined by the user

Parameters:

table_namestr, mandatory

name of the table where this query will be executed

columnslist of str or str, optional, default ‘None’

columns from the table to be retrieved

custom_filtersstr, optional, default ‘None’

No SQL filters defined by the user E.g. ADQL Intersect filter

get_metadata: bool, optional, default False

If set to true, the method will return an astropy.Table containing the available columns for this table, including the description, units, ucd, utype and data type

async_jobbool, optional, default ‘False’

executes the query (job) in asynchronous/synchronous mode (default synchronous)

output_filestr, optional, default None

file name where the results are saved

output_formatstr, optional, default ‘votable’

results format

Users can defined more parameters, using the column names. They will be

used to generate the SQL filters for the query. Some examples are described below,

where the left side is the parameter defined for this method and the right side the

SQL filter generated:

StarName=’star1’ -> StarName = ‘star1’

StarName=’star*’ -> StarName ILIKE ‘star%’

StarName=’star%’ -> StarName ILIKE ‘star%’

StarName=[‘star1’, ‘star2’] -> StarName = ‘star1’ OR StarName - ‘star2’

ra=(‘>’, 30) -> ra > 30

ra=(20, 30) -> ra >= 20 AND ra <= 30

Returns:

An astropy.table object containing the results

query_tap(query, *, async_job=False, output_file=None, output_format='votable', verbose=False)

Launches a synchronous or asynchronous job to query the ISLA TAP

Parameters:

querystr, mandatory

query (adql) to be executed

async_jobbool, optional, default ‘False’

executes the query (job) in asynchronous/synchronous mode (default synchronous)

output_filestr, optional, default None

file name where the results are saved. If this parameter is not provided

output_formatstr, optional, default ‘votable’

results format

verbose: bool, optional, default False

To log the query when executing this method.

Returns:

An astropy.table object containing the results

reset_cache_location()

Resets the cache location to the default astropy cache