Primary Goal: The QMAP experiment was a balloon-borne CMB telescope designed to map anisotropy on degree scales and to measure the angular power spectrum covering the range 40 < l < 200. Receiver: Two 40 GHz HEMT detectors at resolution of 0.9 degrees (one in each polarization) Four 30 GHz HEMT detectors at resolution of 0.6 degrees (two in each polarization) Optics: Four cooled corrugated feeds under-illuminate a fixed off-axis parabolic mirror of 0.85m diameter. The mirror in turn under-illuminates a large chopping flat (chopper). The chopper is closest to the sky so that the illumination on the parabola is stationary. Flights: Flight 1  - Palestine, Texas, June 1996 (4.7 hours of integration) float at 30 km Flight 2 - Fort Sumner, New Mexico, November 1996 (11 hours of integration) float at 30 km Sky Coverage: 527 square degrees in multiply interlocking pattern allowing for internal checks leading to a true map

Papers

• "Mapping the CMB I: the first flight of the QMAP experiment" Devlin et al. , 1998 (astro-ph/9808043)
• "Mapping the CMB II: the second flight of the QMAP expent"  Herbig et al. , 1998 (astro-ph/9808044)
• "Mapping the CMB III: combined analysis of QMAP flights,"  de Oliveira-Costa et al., 1998 (astro-ph/0003090)
• "Galactic contamination in the QMAP experiment", de Oliveira-Costa et al. , 2000 (astro-ph/0003090)
• "Comparing and combining the Saskatoon, QMAP and COBE CMB maps" , Xu et al., 2000 (astro-ph/0010552)
• "The QMAP and MAT/TOCO Experiments for Measuring Anisotropy in the Cosmic Microwave

Background", Miller et al., 2001 (astro-ph/0108030)