2008ApJ...688...24G

Query : 2008ApJ...688...24G

2008ApJ...688...24G - Astrophys. J., 688, 24-31 (2008/November-3)

TRIS. II. Search for CMB spectral distortions at 0.60, 0.82, and 2.5 GHz.

GERVASI M., ZANNONI M., TARTARI A., BOELLA G. and SIRONI G.

Abstract (from CDS):

With the TRIS experiment we have performed absolute measurements of the sky brightness in a sky circle at δ=+42° at the frequencies ν=0.60, 0.82, and 2.5 GHz. In this paper we discuss the techniques used to separate the different contributions to the sky emission and give an evaluation of the absolute temperature of the CMB. For the blackbody temperature of the CMB we get TthCMB=2.837±0.129±0.066 K at ν=0.60 GHz, TthCMB=2.803±0.051+0.430–0.300 K at ν=0.82 GHz, and TthCMB=2.516±0.139±0.284 K at ν=2.5 GHz. The first error bar is statistic (1 σ), while the second one is systematic. These results represent a significant improvement with respect to the previous measurements. We have also set new limits to the free-free distortions, -6.3x10–6<Yff<12.6x10–6, and slightly improved the Bose-Einstein upper limit,|µ|<6x10–5, both at 95% confidence level.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Cosmic Microwave Background - Cosmology: Cosmological Parameters - Cosmology: Observations - Cosmology: Diffuse Radiation - Radio Continuum: Galaxies

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Cyg Complex reg 20 32 +45.0           ~ 667 0

Query : 2008ApJ...688...24G

Basic data :
NAME Cyg Complex -- Region defined in the Sky
Other object types: otypes_help 		reg ()
ICRS coord. (ep=J2000) : 		20 32 00.0 +45 00 00 [ ] E ~
FK4 coord. (ep=B1950 eq=1950) : 		20 30 18.9 +44 49 46 [ ]
Gal coord. (ep=J2000) : 		083.0584 +03.1569 [ ]
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Identifiers (3) :
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NAME Cyg Complex NAME Cyg Region NAME Cygnus Region

References (667 between 1850 and 2026) (Total 667)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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