Hubble Space Telescope How do I convert a line strength into a flux in Jy?
Q.: How do I convert a line strength into a flux in Jy?
A.: If you have a total line flux in W/m2 you can convert it into an
equivalent continuum flux in Jy for one of the NICMOS filters by dividing
it by the filter bandwidth in Hz and then multiplying by 1.0E+26. This
will give you a flux that you can use in the Exposure Time Calculator
as though it were a continuum source. If you have a ground-based
spectrum calibrated in Jy, you should integrate the spectrum across
the filter bandwidth in order to determine the total flux, and then
convert back to an equivalent continuum flux as above. If your source
is entirely dominated by very strong line emission inside the filter
bandpass, you can use the `emission line source' option in the Exposure
Time Calculator, and enter the relevant line flux.