A Detection of Bright Features in the Microwave Background

Abstract

We report the characterization of bright, compact features in the cosmic microwave background radiation (CMBR) detected during the June 1992 and June 1994 balloon flights of the Medium Scale Anisotropy Measurement (MSAM1-92 and MSAM1-94, respectively). Spectral flux densities are determined for each feature at 5.7, 9.3, and 16.5 cm${}^{-1}$. No viable counterparts for these features were found in source catalogs at 5 GHz or at 100 $\mu$m. The measured spectrum of each feature is consistent with a temperature fluctuation in the CMBR. The existence of these features is consistent with adiabatic fluctuation models of anisotropy in the CMBR.

17 pages, LaTeX+aasms4 package, 2 included PostScript figures. Submitted to Ap.J Letters

References in corpus (4)

• FAR-INFRARED SPECTRAL OBSERVATIONS OF THE GALAXY BY COBE
• A Measurement of the Angular Power Spectrum of the Anisotropy in the Cosmic Microwave Background
• A Balloon-Borne Millimeter-Wave Telescope for Cosmic Microwave Background Anisotropy Measurements
• MSAM1-94: Repeated Measurement of Medium-Scale Anisotropy in the Cosmic Microwave Background Radiation

Cited by in corpus (1)

• A characterization of the diffuse Galactic emissions at large angular scales using the Tenerife data