ABOUT LAMBDA

TRIS Data Products at LAMBDA

The TRIS experiment performed absolute measurements of the sky brightness in a sky circle at declination +42 degrees at the frequencies 0.60, 0.82, and 2.5 GHz, using geometrically scaled antennas with identical beams (HPBW 18 degrees x 23 degrees). The TRIS group used the data to separate the different contributions to the sky emission and to evaluate the absolute temperature of the CMB at 0.60, 0.82 and 2.5 GHz.

Zannoni et al. 2008 ApJ 688, 12, ADS; Gervasi et al. 2008, ApJ, 688, 24, ADS; Tartari et al. 2008, ApJ, 688, 32, ADS.


TRIS image
Recent and most sensitive CMB temperature measurements below 5 GHz. TRIS data are marked as open squares.
An improvement of more than a factor of 10 was gained at frequencies below 1 GHz.
The data plotted are available here

TRIS image

TRIS Data Products
Product
Download Page
Description No. Of
Files/Size
0.6 GHz Drift Scan Absolutely calibrated 0.60 GHz drift scan along a 24h right ascension circle at declination +42 degrees. 1 file 3.7 KB
0.82 GHz Drift Scan Absolutely calibrated 0.82 GHz drift scan along a 24h right ascension circle at declination +42 degrees. 1 file 3.7 KB
2.5 GHz Sky Temperatures Absolute 2.5 GHz sky temperature measurements for 6 positions at declination +42 degrees. 1 file 0.4 KB
Beam Profile H plane and E plane beam profile cuts. The beam profile is the same at 0.6, 0.82, and 2.5 GHz. 1 file 1.8 KB
A service of the HEASARC and of the Astrophysics Science Division at NASA/GSFC
Goddard Space Flight Center, National Aeronautics and Space Administration
HEASARC Director: Dr. Alan P. Smale
LAMBDA Director: Dr. Eric R. Switzer
NASA Official: Dr. Eric R. Switzer
Web Curator: Mr. Michael R. Greason