ReadFitsCatalogTask¶

ReadFitsCatalogTask reads an object catalog from a FITS file into a numpy array object suitable for use with lsst.meas.algorithms.IngestIndexReferenceTask.

Python API summary¶

from lsst.meas.algorithms.readFitsCatalogTask import ReadFitsCatalogTask

classReadFitsCatalogTask(config=None, name=None, parentTask=None, log=None): Read an object catalog from a FITS table...

attributeconfig: Access configuration fields and retargetable subtasks.

methodrun(filename): Read an object catalog from the specified FITS file...

Retargetable subtasks¶

No subtasks.

Configuration fields¶

column_map¶

Default: {}
Field type: DictField
Key type: str
Value type: str

Mapping of input column name: output column name; each specified column must exist, but additional columns in the input data are written using their original name.

hdu¶

Default: 1
Field type: int Field

HDU containing the desired binary table, 0-based but a binary table never occurs in HDU 0

Examples¶

A complete example of using ReadFitsCatalogTask:

from lsst.meas.algorithms.readFitsCatalogTask import ReadFitsCatalogTask
filePath = "tests/data/testReadFitsCatalog.fits"
task = ReadFitsCatalogTask()
catalogArray = task.run(filePath)

The resulting catalogArray is a numpy structured array containing fields such as “name”, “ra” and “dec” and a few rows of data. For more complicated cases config parameters allow you to rename columns and choose which HDU to read.

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