NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Cosmic microwave background dipole spectrum measured by the COBE FIRAS instrumentThe Far-Infrared Absolute Spectrophotometer (FIRAS) instrument on the Cosmic Background Explorer (COBE) has determined the dipole spectrum of the cosmic microwave background radiation (CMBR) from 2 to 20/cm. For each frequency the signal is decomposed by fitting to a monopole, a dipole, and a Galactic template for approximately 60% of the sky. The overall dipole spectrum fits the derivative of a Planck function with an amplitude of 3.343 +/- 0.016 mK (95% confidence level), a temperature of 2.714 +/- 0.022 K (95% confidence level), and an rms deviation of 6 x 10(exp -9) ergs/sq cm/s/sr cm limited by a detector and cosmic-ray noise. The monopole temperature is consistent with that determined by direct measurement in the accompanying article by Mather et al.
Document ID
19950040016
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Fixsen, D. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Cheng, E. S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Cottingham, D. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Eplee, R. E., Jr. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Isaacman, R. B. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mather, J. C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Meyer, S. S. (MIT, Cambridge, MA United States)
Noerdlinger, P. D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Shafer, R. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Weiss, R. (MIT, Cambridge, MA United States)
Date Acquired
August 16, 2013
Publication Date
January 10, 1994
Publication Information
Publication: The Astrophysical Journal, Part 1
Volume: 420
Issue: 2
ISSN: 0004-637X
Subject Category
ASTROPHYSICS
Distribution Limits
Public
Copyright
Other