The CSC limiting sensitivity service can retrieve the upper photon flux limit, in units of photon/cm^2/sec.
Mark Bautz' suggested electron flux limit (100 e/cm^2-s-sr-MeV) and proton flux limit (10^5 p/cm^2-s-sr-MeV) (each for one hour) are shown on the plots, together with Steve O'Dell's proton flux warning level of 3.10^4 p/cm^2-s-sr-MeV.
The Chandra Galactic Bulge Survey (GBS) is a shallow survey with a flux limit of 1e-14 erg/cm2/s (0.5-10.0 keV) that covers a pair of 6 sq.
It can be used to provide a simple x-ray flux limit for individual sources detected at other wavelengths, and is required to calculate sky coverage histograms (solid angle surveyed as a function of limiting flux), which are themselves needed to calculate luminosity functions and logN-logS.
A very simple approximate explicit expression is also given for the mass transfer coefficient, that is shown to be valid in the low oxygen flux limit or when the primary combustion product is CO2.
Where nonlocal transport (instead of simple single flux limit) has been modeled, it has always been with what we denote the equivalent diffusion solution, namely treating the transport as only a diffusion process.
