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We present the large-scale sidereal anisotropy ofgalactic cosmic-rayintensity in the multi-TeV region observed with the Tibet-IIIair shower arrayduring the period from 1999 through 2003. The sidereal daily variation ofcosmic rays observed in this experiment shows an excess of relative intensityaround $4\sim7 $ hours local sidereal time, as well as a deficit around 12hours local sidereal time. While the amplitude of the excess is not significantwhen averaged over all declinations, the excess in individual declinaton bandsbecomes larger and clearer as the viewing direction moves toward the south. Themaximum phase of the excess intensity changes from $\sim$7 at the northernhemisphere to $\sim$4 hours at the equatorial region. We also show that boththe amplitude and the phase of the first harmonic vector of the daily variationare remarkably independent of primary energy in the multi-TeV region. This isthe first result determining the energy and declination dependences of the full24-hour profiles of the sidereal daily variation in the multi-TeV region with asingle air shower experiment.Comment: 13 pages, 3 figures, 1 table. Accepted for publication in ApJ

Large-Scale Sidereal Anisotropy of Galactic Cosmic-Ray Intensity Observed by the Tibet Air Shower Array