The author reports on an image of the microwave sky with 30' resolution in a 2° field using the Cosmic Anisotropy Telescope (CAT). Analysis of data taken at three frequencies near 15 GHz indicates that most of the signal is due to the CMB, with an equivalent broad-band power of ∆T/T = 1.9±0.5×10-5 at angular scales corresponding to multipoles l = 320 - 500, and ∆T/T = 1.8(+0.7,-0.5)×10-5 at l = 500 - 680. A more advanced instrument is now under construction, the Very Small Array (VSA), which will cover the range l = 130 - 1800 with a sensitivity per resolution element of ∆T/T ≡ 10-6.
Microwave Background Anisotropies
- Pub Date:
- Cosmic Microwave Background: Anisotropy;
- 6 pages, LaTex, uses 'cmb.sty' (included), 3 PostScript figures. To appear in proceedings of the XXXIst Rencontre de Moriond, `Microwave Background Anisotropies'