OGIPDatasetReader

class gammapy.datasets.OGIPDatasetReader(filename)

Bases: gammapy.datasets.io.DatasetReader

Read SpectrumDatasetOnOff from OGIP files.

BKG file, ARF, and RMF must be set in the PHA header and be present in the same folder.

The naming scheme is fixed to the following scheme:

• PHA file is named pha_obs{name}.fits

• BKG file is named bkg_obs{name}.fits

• ARF file is named arf_obs{name}.fits

• RMF file is named rmf_obs{name}.fits with {name} the dataset name.

Parameters

filenamestr or Path

OGIP PHA file to read

Attributes Summary

tag

Methods Summary

get_filenames(pha_meta)	Get filenames
get_valid_path(filename)	Get absolute or relative path
read()	Read dataset
read_arf(filename, livetime)	Read ARF file
read_bkg(filename)	Read PHA background file
read_pha(filename)	Read PHA file
read_rmf(filename, exposure)	Read RMF file

Attributes Documentation

tag = 'ogip'

Methods Documentation

get_filenames(pha_meta)

Get filenames

Parameters

pha_metadict

Meta data from the PHA file

Returns

filenamesdict

Dict with filenames of “arffile”, “rmffile” (optional) and “bkgfile” (optional)

get_valid_path(filename)

Get absolute or relative path

The relative path is with respect to the name of the reference file.

Parameters

filenamestr or Path

Filename

Returns

filenamePath

Valid path

read()

Read dataset

Returns

datasetSpectrumDatasetOnOff

Spectrum dataset

static read_arf(filename, livetime)

Read ARF file

Parameters

filenamestr or Path

PHA file name

livetimeQuantity

Livetime

Returns

dataRegionNDMap

Exposure map

static read_bkg(filename)

Read PHA background file

Parameters

filenamestr or Path

PHA file name

Returns

datadict

Dict with counts_off and acceptance_off

static read_pha(filename)

Read PHA file

Parameters

filenamestr or Path

PHA file name

Returns

datadict

Dict with counts, acceptance and mask_safe

static read_rmf(filename, exposure)

Read RMF file

Parameters

filenamestr or Path

PHA file name

exposureRegionNDMap

Exposure map

Returns

dataEDispKernelMap

Dict with edisp