The small-scale autocorrelation function of the X-ray background

Details The small-scale autocorrelation function of the X-ray background The small-scale autocorrelation function of the X-ray background

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.237..119b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 237, March 1, 1989, p. 119-127. Research supported by C

Astronomy and Astrophysics

Astronomy

30

Background Radiation, Galactic Evolution, Intergalactic Media, Red Shift, X Ray Sources, Autocorrelation, Heao 2, Universe

Scientific paper

The angular correlation function of the 1-3 keV X-ray background has been studied using data from five deep Einstein IPC fields. Only counts in the central part of the detector, where the response is nearly flat, have been considered. After removing possible sources, a Gaussian has been fitted to the autocorrelation function from 1 to 15 arcmin. This shows a signal below 5 arcmin, although it is not clear whether it is due to the cosmic X-ray background. An upper limit for the autocorrelation function at 5 arcmin is roughly 9 percent after estimating the contribution from noncosmic background. The implications of this upper limit for the large-scale structure of the X-ray universe are discussed.

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