Use of CBB filter

[HRM Observatory]

In Bruce Gary's book he recommends use of the CBB filter for exoplanet observing:

http://www.astrodon.com/store/p9/Exo-Planet_Filter.html

This filter blocks out blue light making the light flux more consistent as altitude changes.  Would use of this filter be recommended when using AstroImageJ?

[karenacollins]

Yes, the CBB works well for targets that are faint relative to your telescope aperture. For scientific work, if you get enough photons in the filter, it is better to use BVRI or Sloan g,r,i,z filters since they are better modelled for limb darkening coefficients, and can be used to detect filter dependent transit depths, which can be useful for detecting false positive candidates (Bleneded EBs, etc.). The CBB can be approximated as the Kepler filter for limb darkening purposes.

Karen

[HRM Observatory]

Sounds good.  Thanks.

Ed