2010

Bright Source Subtraction Requirements For Redshifted 21 cm Measurements

Datta, A., Bowman, J. D., Carilli, C. L.

Understand

The \hi 21 cm transition line is expected to be an important probe into the cosmic dark ages and epoch of reionization.

Foreground source removal is one of the principal challenges for the detection of this signal.
This paper investigates the extragalactic point source contamination and how accurately bright sources ($\gtrsim 1$ ~Jy) must be removed in order to detect 21 cm emission with upcoming radio telescopes such as the Murchison Widefield Array (MWA).
We consider the residual contamination in 21 cm maps and power spectra due to position errors in the sky-model for bright sources, as well as frequency independent calibration errors.

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