MAX4 Gamma Ursae Minoris Documentation

The file "max4gu.dat" contains the Gamma Ursae Minoris observation binned data from the fourth flight of the Millimeter-wave Anisotropy eXperiment (MAX4). The analysis is described in detail in Devlin et al. 1994, Ap. J. 430, L1 (astro-ph 9404036).

There are four bands centered at 3.5, 6, 9, and 14 cm-1. The 14cm-1 band is included as a veto for interstellar dust; it should not be included in any CMBR analysis.

We have divided the data set into three time periods to minimize the effect of sky rotation. Rotation number in column 1 references each time period. Each of the 3 rotations is divided into 21 azimuth bins. The rotations are given sequentially in the data set.

There are 12 columns and 63 rows in the file. In column 4, positive is in the direction of positive azimuth. Temperatures are in antenna temperature difference units. To convert from antenna temperature differences to CMBR temperature differences, scale by

Band (cm-1) Scale
3.5 1.54
6 2.47
9 6.18
14 34.1

Column Description Number format
1 Rotation number integer
2 Right ascension (degrees) real
3 Declination (degrees) real
4 Angle from center of scan (degrees) real
5 3.5 cm-1 band (Kelvin) real
6 3.5 cm-1 band variance (Kelvin) real
7 6 cm-1 band (Kelvin) real
8 6 cm-1 band variance (Kelvin) real
9 9 cm-1 band (Kelvin) real
10 9 cm-1 band variance (Kelvin) real
11 14 cm-1 band (Kelvin) real
12 14 cm-1 band variance (Kelvin) real
Please direct questions or comments to Mark Devlin.