SCSService

class pyvo.dal.SCSService(baseurl, session=None)

Bases: DALService

a representation of a Cone Search service

instantiate a Cone Search service

Parameters

baseurlstr

the base URL for submitting search queries to the service.

sessionobject

optional session to use for network requests

Attributes Summary

columns	the available columns on this service
description	the service description.

Methods Summary

create_query([pos, radius, verbosity])	create a query object that constraints can be added to and then executed.
describe()	describe the general information about the DAL service
search(pos[, radius, verbosity])	submit a simple Cone Search query that requests objects or observations whose positions fall within some distance from a search position.

Attributes Documentation

columns

the available columns on this service

description

the service description.

Methods Documentation

create_query(pos=None, radius=None, verbosity=None, **keywords)

create a query object that constraints can be added to and then executed. The input arguments will initialize the query with the given values.

Parameters

posastropy.coordinates.SkyCoord

a SkyCoord instance defining the position of the center of the circular search region. converted if it’s a iterable containing scalars, assuming icrs degrees.

radiusQuantity or float

a Quantity instance defining the radius of the circular search region, in degrees. converted if it is another unit.

verbosityint

an integer value that indicates the volume of columns to return in the result table. 0 means the minimum set of columns, 3 means as many columns as are available.

**keywords

additional case insensitive parameters can be given via arbitrary case insensitive keyword arguments. Where there is overlap with the parameters set by the other arguments to this function, these keywords will override.

Returns

SCSQuery

the query instance

See also

SCSQuery

describe()

describe the general information about the DAL service

search(pos, radius=1.0, verbosity=2, **keywords)

submit a simple Cone Search query that requests objects or observations whose positions fall within some distance from a search position.

Parameters

posastropy.coordinates.SkyCoord

a SkyCoord instance defining the position of the center of the circular search region. converted if it’s a iterable containing scalars, assuming icrs degrees.

radiusQuantity or float

a Quantity instance defining the radius of the circular search region, in degrees. converted if it is another unit.

verbosityint

an integer value that indicates the volume of columns to return in the result table. 0 means the minimum set of columns, 3 means as many columns as are available.

**keywords

additional case insensitive parameters can be given via arbitrary case insensitive keyword arguments. Where there is overlap with the parameters set by the other arguments to this function, these keywords will override.

Returns

SCSResults

a container holding a table of matching catalog records

Raises

DALServiceError

for errors connecting to or communicating with the service

DALQueryError

if the service responds with an error, including a query syntax error.

See also

SCSResults

pyvo.dal.DALServiceError

pyvo.dal.DALQueryError