Noise properties of the BOOMERANG instrument

Abstract

Abstract. In this paper we report a short description of the BOOMERANG experiment explaining his scientific goal and the technologies implied. We concentrate then on the analysis of the noise properties discussing in particular the scan synchronous noise. Finally we present the calibration technique and the sensitivity of all the channels.

Cosmological birefringence due to CPT-even Chern–Simons-like term with Kalb–Ramond and scalar fields

“…By taking = 1, V 0 ∼ 10 −85 (GeV) 4 , ξ 1 = 1, ξ 2 = 1, ξ ν e ∼ 10 −3 , and n = 3/2 for a matter-dominated universe, we get α ∼ −9.7 × 10 −2 , which could explain the results in Refs. [2,[9][10][11][12][13][14][15].…”

“…In particular, the analysis by Feng et al [2] gives α = −6.0 ± 4.0 • , while the Wilkinson Microwave Anisotropy Probe (WMAP) group α = −1.7 ± 2.1 • with 5 year data [9]. In addition, the Combined WMAP 5 year data with the BOOMERanG data leads to α = −2.6 ± 1.9 • [10][11][12][13], and an improved a e-mail: gore@mail.nctu.edu.tw b e-mail: bamba@sss.fukushima-u.ac.jp c e-mail: geng@phys.nthu.edu.tw result by the QUaD Collaboration is α = 0.64 ± 0.5 ± 0.5 • [14,15]. Combined QUaD, WMAP7, B03 and BICEP data indicates α = −0.04 ± 0.35 • [16].…”