Package ivs :: Package catalogs :: Module gcpd

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Module gcpd

Interface to Geneva's Genaral Catalogue of Photometric Data

Functions

Basic interfaces

search(name, **kwargs)
Search and retrieve information from the GCPD catalog.

source code

record array

gcpd2phot(source, results, units, master=None, e_flag='e_', q_flag='q_', extra_fields=None)
Convert/combine GCPD record arrays to measurement record arrays.

source code

get_photometry(ID=None, extra_fields=[], **kwargs)
Download all available photometry from a star to a record array.

source code

Internal helper functions

_get_URI(name='GENEVA', ID=None, **kwargs)
Build GCPD URI from available options.

source code

Variables

systems = {'JOHNSON': 1, 'STROMGREN': 4, 'ARGUE': 10, 'GENEVA'...

logger = logging.getLogger("CAT.VIZIER")

basedir = os.path.dirname(os.path.abspath(__file__))

cat_info = ConfigParser.ConfigParser()

Function Details

search(name, **kwargs)

Search and retrieve information from the GCPD catalog.

Parameters:

name (string) - name of photometric system

gcpd2phot(source, results, units, master=None, e_flag='e_', q_flag='q_', extra_fields=None)

Convert/combine GCPD record arrays to measurement record arrays.

Every line in the combined array represents a measurement in a certain band.

The standard columns are:

meas: containing the photometric measurement
e_meas: the error on the photometric measurement
flag: an optional quality flag
unit: the unit of the measurement
photband: the photometric passband (FILTER.BAND)
source: name of the source catalog

If you give a master, the information will be added to a previous record array. If not, a new master will be created.

Colors will be expanded, derived from the other columns and added to the master.

The result is a record array with each row a measurement.

Extra fields are not available for the GCPD, they will be filled in with nans.

Parameters:

source (str) - name of the VizieR source
results (record array) - results from VizieR search
units (dict) - header of Vizier catalog with key name the column name and key value the units of that column
master (record array) - master record array to add information to
e_flag (str) - flag denoting the error on a column
q_flag (str) - flag denoting the quality of a measurement
extra_fields (list of str) - any extra columns you want to add information from

Returns: record array

array with each row a measurement

get_photometry(ID=None, extra_fields=[], **kwargs)

Download all available photometry from a star to a record array.

Extra fields will not be useful probably.

For extra kwargs, see _get_URI and gcpd2phot

_get_URI(name='GENEVA', ID=None, **kwargs)

Build GCPD URI from available options.

kwargs are to catch unused arguments.

Parameters:

name (string (automatically uppercased)) - photometric system name (E.g. JOHNSON, STROMGREN, GENEVA...)
ID (string) - star name (should be resolvable by SIMBAD)

Variables Details

systems

Value:

{'JOHNSON': 1, 'STROMGREN': 4, 'ARGUE': 10, 'GENEVA': 13, 'KRON': 19, 
'VILNIUS': 21, 'WOOD': 22, 'WBVR': 78, 'STRAIZYS': 80, 'DDO': 12}