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gammapy / gammapy-fermi-lat-data

This repository contains pre-computed Fermi-LAT datasets.

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Are the correct event files shipped?

joleroi opened this issue · comments

commented

I read through the scripts that prepare the data like fermi_3fhl_data_prepare.sh. In the script the following variables are defined

  • EVENTS
  • EVENTS_SELECTED
    The latter being the output of gtselect. The tools that run after gtselect, however, take EVENTS as input parameter, e.g. here. Also in fermi_3fhl_data_config.yaml the event list keyword seems to point to EVENTS.

So is it correct to use EVENTS as input for the other tools and also use it in the analysis event though there is EVENTS_SELECTED?

commented

Note that there is an additional call to the gtmktime tool, that updates the good time intervals after gtselect. It uses the EVENTS_SELECTED as input and then writes the "final" event list to EVENTS.
This is then used later everywhere else. So the fermi_3fhl_events_selected.fits is only an intermediate result file, that is never really used (but I agree it's a misnomer...). Does that make sense or did you mean something else?

commented

Note that there is an additional call to the gtmktime tool

Sorry, I missed that.