Backgrounds
Description
Two sources of sky background are considered:
Zodiacal light: Zodiacal light varies as a function of angular distance of the target from the Sun and from the ecliptic. We adopt data in Leinert et al. (1998).
Earth shine: Earth-shine varies strongly as a function of angle between the target and the Earth lime. We adopt data from Figure 9.1 in HST/WFC3 instrument handbook.
Background levels
config['background']['zodiacal'] = <zodiacal_level>
<zodiacal_level> can be “high”, “med”, or “low”.