研究成果藝廊

Average power spectrum in units of K 2 of all combinations of days, excluding December 11, as a function of the multipole moment l. Each point is shown with a 2σ upper limit derived from a bootstrap error analysis, which is in most cases smaller than the size of the point. The points are logarithmically spaced as described in the text, from left to right covering the ranges 377 < l < 578, 578 < l < 899 and 899 < l < 1414. Triangles are the power before subtracting foregrounds, diamonds are after 8 MHz mean subtraction, squares are after 2 MHz mean subtraction and circles are after 0.5 MHz subtraction. The curved solid line is the theoretical EoR signal from Jelic et al. (2008), and the dashed line is the theoretical EoR signal ´ with a cold absorbing IGM as described in the text.