Mapping five fields at different ecliptic latitudes we determined an upper limit on the observed brightness fluctuations of 0.2 % at 25 m, corresponding to 25 mJy in the beam at high ecliptic latitudes. This supports the concept of a generally smooth zodiacal light distribution. Faint source counts at brightness levels down to 5 mJy at 60 m or 90 m will not be affected by potential small-scale zodiacal light structures.
© European Southern Observatory (ESO) 1997
Online publication: March 26, 1998