A High spatial resolution analysis of the MAXIMA-1 cosmic microwave background anisotropy data

Apr, 2001
7 pages
Published in:
  • Astrophys.J.Lett. 561 (2001) L1-L6
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Abstract: (arXiv)
We extend the analysis of the MAXIMA-1 cosmic microwave background (CMB) data to smaller angular scales. MAXIMA, a bolometric balloon experiment, mapped a 124 deg2^2 region of the sky with 10\arcmin resolution at frequencies of 150, 240 and 410 GHz during its first flight. The original analysis, which covered the multipole range 3678536 \leq \ell \leq 785, is extended to =1235\ell = 1235 using data from three 150 GHz photometers in the fully cross-linked central 60 deg2^2 of the map. The main improvement over the original analysis is the use of 3\arcmin square pixels in the calculation of the map. The new analysis is consistent with the original for <785\ell < 785. For >785\ell > 785, where inflationary models predict a third acoustic peak, the new analysis shows power with an amplitude of 56±756 \pm 7 \microk at 850\ell \simeq 850 in excess to the average power of 42±342 \pm 3 \microk in the range 441<<785441 < \ell < 785.