Low-frequency measurements of the CMB spectrum

Conference · Mon Jan 15 00:00:00 EST 1990 · AIP Conference Proceedings (American Institute of Physics); (USA)

OSTI ID:7060876

Kogut, A; Bensadoun, M; Amici, G D; Levin, S; Limon, M; Smoot, G ^[1]; Sironi, G ^[2]; Bersanelli, M; Bonelli, G ^[3]

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1. U. C. Berkeley, Berkeley, CA (USA) Lawrence Berkeley Laboratory, Berkeley, CA (USA) Space Sciences Laboratory, Berkeley, CA (USA)
2. Physics Department, University of Milano (Italy)
3. IFCTR/CNR-Milano (Italy)

As part of an extended program to characterize the spectrum of the cosmic microwave background (CMB) at low frequencies, we have performed multiple measurements from a high-altitude site in Calfornia. On average, these measurements suggests a CMB temperature slightly lower than measurements at higher frequencies. Atmospheric conditions and the encroachment of civilization are now significant limitations from our present observing site. In November 1989, we will make new measurements from the South Pole Amundsen-Scott Station at frequencies 0.82, 1.5, 2.5, 3.8, 7.5, and 90 GHz. We discuss recent measurements and indicate improvements possible from a polar observing site.

• OSTI ID: 7060876
• Report Number(s): CONF-8906234-; CODEN: APCPC; TRN: 90-025463
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (USA), Vol. 198:1; Conference: Workshop on astrophysics in Antarctica, Newark, DE (USA), 8-10 Jun 1989; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANTARCTICA
EXPERIMENT PLANNING
BACKGROUND RADIATION
MICROWAVE SPECTRA
ANISOTROPY
CALIBRATION
GHZ RANGE 01-100
MHZ RANGE 100-1000
MICROWAVE RADIATION
RADIOMETERS
RADIOWAVE RADIATION
RESEARCH PROGRAMS
TELESCOPES
ANTARCTIC REGIONS
ELECTROMAGNETIC RADIATION
FREQUENCY RANGE
GHZ RANGE
MEASURING INSTRUMENTS
MHZ RANGE
PLANNING
POLAR REGIONS
RADIATION DETECTORS
RADIATIONS
SPECTRA
640101* - Astrophysics & Cosmology- Cosmic Radiation