Calibration stars philosophy

[vdeloupy]

Prose v3.3.4

Using the photometric pipeline provided by Prose to produce lightcurves of exoplanets transits, it is needed to calibrate the raw target star flux with a collection of so-called calibration stars.
One method to select those stars and produce the photometry is implemented under the method broegg2005 in the Fluxes class.

To compare Prose results with another photometric pipeline used by the ASTEP+ team, we produced lightcurves of the same target star with the same calibrators for both the methods. Theoretically the results should have been exactly the same, but we got highly different results for both CAMB and CAMR cameras (cf. pdf file).

My question is: what is Prose calling a "calibration star"? Is it already detrended with some parameters (background, fwhm, airmass...etc) or are the calibration fluxes kept raw?

A part of the dataset can be sent in private, please contact me at: [email protected] or directly on GitHub.
Mention: @lgrcia

prose3_2.pdf