ball1.gif MSAM1

Cheng et al. (1994 [MSAM1-92 first flight], 1996 [MSAM1-94 second flight], 1997 [MSAM1-95 third flight]) use 5-25 cm$^{-1}$ data from the balloon-borne MSAM1 (Medium Scale Anisotropy Measurement 1) experiment, in conjunction with foreground contamination data, to constrain CMBR anisotropy.

The window functions, computed by A. Kosowsky, were provided by L. Page. The first column in the window function file is $\ell$, which runs from 2 to 700. The second and third columns are the two- and three-beam zero-lag $W_\ell$'s.


Table: MSAM1 zero-lag Window Function Parameters
  $\ell_{e^{-0.5}}$ $\ell_{\rm e}$ $\ell_{\rm m}$ $\ell_{e^{-0.5}}$ $\sqrt{I(W_\ell)}$
2-beam 83 159.1 151 234 1.45
3-beam 181 263.1 270 375 1.14

The quoted bandtemperature values are from Wilson et al., with 5% added in quadrature to their statistical 1 $\sigma$ error bars to account for the MSAM1 1 $\sigma$ calibration uncertainty. They were computed for a flat bandpower spectrum from a combined analysis of all the data.

Fig.: MSAM1 zero-lag window functions. (Postscript version here.) win_MSAM1.gif

REFERENCES

ball23.gifLink to the experiment webpage.

E.S. Cheng, et al., ``Detection of Cosmic Microwave Background Anisotropy by the Third Flight of the Medium-Scale Anisotropy Measurement", Astrophys. J. Lett. 488, L59 (1997).

E.S. Cheng, et al., ``MSAM1-94: Repeated Measurement of Medium-Scale Anisotropy in the Cosmic Microwave Background Radiation", Astrophys. J. Lett. 456, L71 (1996).

E.S. Cheng, et al., ``A Measurement of the Medium-Scale Anisotropy in the Cosmic Microwave Background Radiation", Astrophys. J. Lett. 422, L37 (1994).

G.W. Wilson, et al., ``New Cosmic Microwave Background Power Spectrum Constraints from MSAM1", Astrophys. J. 532, 57 (2000).


Bharat Ratra and Tarun Souradeep
Department of Physics, Kansas State University
Last updated: 2000-08-31