The goal of the QMAP experiment was to observe the CMB in such a way that "true" sky
maps could be produced directly from the data.  QMAP flew twice in 1996.


The photo on the left shows, from left to right Tom Herbig, Mark Devlin, Stu Bradley, Amber Miller, Lyman Page  and Barth Netterfield on the Palestine launch pad in front of Tiny Tim just before flight 1.
Not shown, though who played a major role, are Angelica de Oliveira-Costa  (Princeton and IAS)
and Max Tegmark  (at IAS). In addition,  Norm Jarosik built and designed the bi-phase telemetry system. Bill Vinje and Glen Monnelly worked on the HEMT radiometers. Chris Gabel and Andrea Wood worked on electronics. Jed Beach wrote most of the attitude control code.

The picture on the right shows the  map produced by the experiment. The hot and cold spots are
dominated by fluctuations in the CMB. The circular region in the middle was covered by the
SK experiment.

The QMAP experiment is finished and will not be flown again. The gondola and receiver are
being used in the MAT  experiment.

More information:

The initial results from QMAP are being submitted to Ap. J. in three letters:

Details of the experiment and data reduction/analysis may be found on Tom Herbig's QMAP/INFO page. Additional information on mapmaking and power spectrum analysis can be found on Max Tegmark's CMB anisotropy analysis page.

Maps and covariance matrices can be found here at Max Tegmark's site.

Window Functions: where FL1 = Flight_1, FL2 = Flight_2, and All = Combined data set (FL1+FL2). The normalization is such that the sum over ell of W_l times \delta T_l^2 is the quoted band power squared. This usage differs from the "standard" usage by a factor of ell.

Return to CMB Experiments home page.

Lyman Page / page@pupgg.princeton.edu
Angelica de Oliveira-Costa / angelica@pupgg.princeton.edu