Observation and data selection¶
The gammapy-data-select command line tool can be used to select a
subset of observations from a given observation list. The format for
observation lists is described in Observation lists.
This tool works with FITS files as input/output for now.
For more details, please refer to obs_select.
Examples¶
The gammapy-data-select tool has many options. Only a few examples
are shown here. For a full list of options, please use:
$ gammapy-data-select --help
at the command line.
In order to test the examples below, the test observation list
file located in the gammapy-extra repository
(test_observation_table.fits)
can be used as input observation list.
Find all observations within 5 deg of the Galactic center:
$ gammapy-data-select all_obs.fits galactic_center_obs.fits \ --x 0 --y 0 --r 50 --system 'galactic'
Select all observations in a box along the Galactic plane (GLON = -20 .. +20 deg, GLAT = -3 .. +3 deg) (can of course be combined with other selections shown above):
$ gammapy-data-select all_obs.fits galactic_plane_obs.fits \ --x 0 --y 0 --dx 20 --dy 3 --system 'galactic'
Select all observations in a given date range (can of course be combined with other selections shown above):
$ gammapy-data-select all_obs.fits obs_2010-04-26_to_2010-04-29-12h42.fits \ --t_start '2012-04-20' --t_stop '2012-04-30T12:42'
Select all observations in a given observation ID range (can of course be combined with other selections shown above):
$ gammapy-data-select all_obs.fits obs_042_to_100.fits \ --par_name 'OBS_ID' --par_min 42 --par_max 101
Select all observations in a given altitude range (can of course be combined with other selections shown above):
$ gammapy-data-select all_obs.fits alt_70_to_90_deg_obs.fits \ --par_name 'ALT' --par_min 70 --par_max 90
Select all observations with exactly 4 telescopes (can of course be combined with other selections shown above):
$ gammapy-data-select all_obs.fits 4_tel_obs.fits \ --par_name 'N_TELS' --par_min 4 --par_max 4