correct for overestimate of the continuum due to using the r-band filter that includes halpha

rfinn / halphagui

development of gui interface for H-alpha narrowband imaging

GNU General Public License v3.0

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correct for overestimate of the continuum due to using the r-band filter that includes halpha #92

Open rfinn opened 1 year ago

rfinn commented 1 year ago

Correct for oversubtraction of continuum. this occurs because \ha \ is in the r-band filter. Following \citet{Gavazzi2006}, we assume the corrected \ha \ flux is:

\begin{equation} F(H\alpha) = F(H\alpha)0 \left(1 + \frac{\int R{H\alpha}(\lambda)d\lambda}{\int R_r(\lambda)d\lambda}\right) \end{equation}

TODO

calculate the ratio f the filter throughputs for each Halpha/r combination
then we can apply this correction in the halpha gui, to write a corrected flux level to the table

rfinn commented 2 months ago

this is now implemented in subtract_continuum.py, but we should also implement it in halpha gui where we estimate continuum from ratio of photometric zeropoints.