MAXIMA-1: A Measurement of the Cosmic Microwave Background Anisotropy on Angular Scales of 10'-5°
Abstract
We present a map and an angular power spectrum of the anisotropy of the cosmic microwave background (CMB) from the first flight of the Millimeter-wave Anisotropy Experiment Imaging Array (MAXIMA). MAXIMA is a balloon-borne experiment with an array of 16 bolometric photometers operated at 100 mK. MAXIMA observed a 124 deg2 region of the sky with 10' resolution at frequencies of 150, 240, and 410 GHz. The data were calibrated using in-flight measurements of the CMB dipole anisotropy. A map of the CMB anisotropy was produced from three 150 and one 240 GHz photometer without need for foreground subtractions. Analysis of this CMB map yields a power spectrum for the CMB anisotropy over the range 36<=l<=785. The spectrum shows a peak with an amplitude of 78+/-6 μK at l~=220 and an amplitude varying between ~40 and ~50 μK for 400<~l<~785.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 2000
- DOI:
- 10.1086/317322
- arXiv:
- arXiv:astro-ph/0005123
- Bibcode:
- 2000ApJ...545L...5H
- Keywords:
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- Cosmology: Cosmic Microwave Background;
- Cosmology: Observations;
- Astrophysics
- E-Print:
- Reflects version accepted for publication in Ap J Letters