A CMBR Measurement Reproduced: A Statistical Comparison of MSAM1-94 to MSAM1-92

The goal of the second flight of the Medium Scale Anisotropy Measurement (MSAM1-94) was to confirm the measurement of cosmic microwave background radiation (CMBR) anisotropy made in the first flight (MSAM1-92). The CMBR anisotropy and interstellar dust emission signals from the two flights are compared by forming the sum and difference of those portions of the data with the same pointings on the sky. The difference data are consistent with a null detection, while the summed data show significant signal. We conclude that MSAM1-92 and MSAM1-94 measured the same celestial signal. Subject headings: balloons — cosmic microwave background — cosmology: observations University of Chicago, 5640 S. Ellis St., Chicago, IL 60637 Laboratory for Astronomy and Solar Physics, NASA/Goddard Space Flight Center, Code 685.0, Greenbelt, MD 20771 Global Science and Technology, Inc., NASA/GSFC Laboratory for Astronomy and Solar Physics, Code 685.0, Greenbelt, MD 20771 Applied Research Corporation, NASA/GSFC Laboratory for Astronomy and Solar Physics, Code 685.3, Greenbelt, MD 20771 Princeton University Physics Dept., Princeton, NJ 08544 Department of Physics, University of California, Santa Barbara, CA 93106