ball1.gif MAT 1997

Torbet et al. use Ka band (centered on 30 GHz) and Q band (centered on 40 GHz) data from the ground-based MAT (Mobile Anisotropy Telescope) 1997 experiment on Cerro Toco, Chile, to constrain CMBR anisotropy.

The window functions were provided by E. Torbet. There are three files, one with the Ka (Ka1/2) $W_\ell$'s and two with the Q (Q1 and Q3/4) $W_\ell$'s. The first column in each window function file is $\ell$, which runs from 2 to 800 (although some $W_\ell$'s are not computed to $\ell = 800$). The last nine columns in the Ka1/2 file are the zero-lag Ka1/2 $W_\ell$'s for the 4, 5, ..., 12 point chops. The last eleven columns in the Q1 file are the zero-lag Q1 $W_\ell$'s for the 4, 5, ..., 14 point chops. The last ten columns in the Q3/4 file are the zero-lag Q3/4 $W_\ell$'s for the 5, 6, ..., 14 point chops.


Table: MAT 1997 Ka1/2 zero-lag Window Function Parameters
  $\ell_{e^{-0.5}}$ $\ell_{\rm e}$ $\ell_{\rm m}$ $\ell_{e^{-0.5}}$ $\sqrt{I(W_\ell)}$
4pt 45 63.4 62 82 0.839
5pt 65 86.5 83 103 0.706
6pt 86 107.4 104 124 0.648
7pt 106 127.3 123 145 0.550
8pt 126 145.1 144 165 0.520
9pt 145 165.5 163 184 0.459
10pt 165 182.3 183 204 0.442
11pt 184 191.9 203 224 0.417
12pt 204 215.0 222 243 0.373

Fig.: MAT 1997 Ka1/2 zero-lag window functions. (Postscript version here.) win_MAT97Ka12.gif


Table: MAT 1997 Q1 zero-lag Window Function Parameters
  $\ell_{e^{-0.5}}$ $\ell_{\rm e}$ $\ell_{\rm m}$ $\ell_{e^{-0.5}}$ $\sqrt{I(W_\ell)}$
4pt 46 63.4 63 82 0.823
5pt 65 86.7 83 104 0.703
6pt 87 110.2 105 126 0.648
7pt 107 131.2 125 147 0.551
8pt 127 151.3 145 167 0.534
9pt 147 172.2 165 188 0.465
10pt 167 190.8 186 208 0.467
11pt 187 202.8 205 228 0.437
12pt 207 221.3 225 248 0.400
13pt 225 245.2 245 268 0.370
14pt 245 267.2 264 288 0.366

Fig.: MAT 1997 Q1 zero-lag window functions. (Postscript version here.) win_MAT97Q1.gif


Table: MAT 1997 Q3/4 zero-lag Window Function Parameters
  $\ell_{e^{-0.5}}$ $\ell_{\rm e}$ $\ell_{\rm m}$ $\ell_{e^{-0.5}}$ $\sqrt{I(W_\ell)}$
5pt 63 82.7 80 100 0.725
6pt 84 105.6 101 121 0.663
7pt 103 125.4 120 141 0.561
8pt 122 145.2 140 161 0.536
9pt 141 165.0 159 180 0.475
10pt 161 183.6 179 200 0.469
11pt 180 195.7 198 219 0.436
12pt 199 212.4 217 238 0.404
13pt 217 236.1 236 257 0.373
14pt 236 258.1 255 277 0.363

Fig.: MAT 1997 Q3/4 zero-lag window functions. (Postscript version here.) win_MAT97Q34.gif

The quoted bandtemperature values are computed for a flat bandpower spectrum. They are from Torbet et al. with 10% added in quadrature to their statistical 1 $\sigma$ error bars to account for the 1 $\sigma$ calibration uncertainty.

REFERENCES

ball22.gifball23.gifLinks to the experiment webpages.

E. Torbet, et al., ``A Measurement of the Angular Power Spectrum of the Microwave Background Made from the High Chilean Andes", Astrophys. J. Lett. 521, L79 (1999).


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