MAX measures CMB anisotropy on 0.5 degree angular scales.
MAX has presented CMB results from nine sky regions from five flights from 1989 to 1994.
MAX is an off-axis Gregorian telescope and a bolometric photometer mounted on an attitude-controlled balloon platform. The telescope has a 1 m off-axis parabolic primary with an elliptical secondary which sinusoidally modulates the beam on the sky.
More information on beam sizes, chopping amplitude, and bandpasses.
MAX Scanning Strategy and Observations
Each CMB observation
(except MAX2 GUM) consists of constant velocity scans in azimuth while optically tracking a target star such
that sky rotation pivots the observed area about the star.
Stars used include: