ar X iv : a st ro - p h / 04 06 67 0 v 1 2 9 Ju n 20 04 Inflation After WMAP

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ar X iv : a st ro - p h / 04 06 19 5 v 1 7 Ju n 20 04 The Cosmic Microwave Background and Inflation Parameters

We review the currrent cosmic parameter determinations of relevance to inflation using the WMAP-1year, Boomerang, CBI, Acbar and other CMB data. The basic steps in the pipelines which determine the bandpowers from the raw data from which these estimations are made are summarized. We forecast how the precision is likely to improve with more years of WMAP in combination with future ground-based e...

ar X iv : a st ro - p h / 04 06 65 8 v 1 2 9 Ju n 20 04 Calibration of cameras of the H . E . S . S . detector

H.E.S.S. – the High Energy Stereoscopic System– is a new system of large atmospheric Cherenkov telescopes for GeV/TeV astronomy. Each of the four telescopes of 107 m mirror area is equipped with a 960-pixel photomulitiplier-tube camera. This paper describes the methods used to convert the photomultiplier signals into the quantities needed for Cherenkov image analysis. Two independent calibratio...

ar X iv : a st ro - p h / 04 03 69 9 v 1 3 0 M ar 2 00 4 Reionization , SLOAN , and WMAP : is the Picture Consistent ?

I show that advanced simulations of cosmological reionization are able to fit the observed data on the mean transmitted flux in the hydrogen Lyman-alpha line at z ∼ 6. At the same time, posteriori models can be constructed that also produce a large value (20%) for the Thompson scattering optical depth, consistent with the WMAP measurements. Thus, it appears that a consistent picture emerges in ...

ar X iv : a st ro - p h / 06 04 29 8 v 1 1 3 A pr 2 00 6 the Non - Gaussianity of Racetrack Inflation Models

In this paper, we use the result in [7] to calculate the non-Gaussianity of the racetrack models in [3, 5]. Our results show that the nonGaussianity in [3] is reasonable, while the non-Gaussianity in [5] is beyond the observational limits.