# README_3PC_SensitivityMap.txt
# Created by david.smith@u-bordeaux.fr for Toby Burnett on 2023 March 5.
# Updated 26 July 2023 (das) (thb).

Section 7.3 of the 3PC (the third Fermi LAT gamma-ray pulsar catalog) describes how 
we calculate the LAT's phase-integrated point source sensitivity for 12 years of exposure. 
The FITS file 3PC_SensitivityMap_20230629.fits provides the sensitivity over the entire sky,  
in 0.25 degree pixels, in units of the integrated energy flux (0.1-100 GeV), ergs s-1 cm-2. 

The python script Example_3PC_SensitivityMap.py has code to:

* Read the file and produce an image similar to Figure 25.
* Return the (l,b) Galactic coordinates in decimal degrees for a known source
* Using values for l and b, return the contents of the corresponding pixel. Note that if the 
coordinate is within 0.5 deg of an existing Fermi-LAT source, the value is set to nan.