%0 Journal Article
%T Study of Redshifted HI from the Epoch of Reionization with Drift scan
%A Sourabh Paul
%A Shiv K. Sethi
%A Ravi Subrahmanyan
%A N. Udaya Shankar
%A K. S. Dwarakanath
%A Avinash A. Deshpande
%A Gianni Bernardi
%A Judd D. Bowman
%A Frank Briggs
%A Roger J. Cappallo
%A Brian E. Corey
%A David Emrich
%A Bryan M. Gaensler
%A Robert F. Goeke
%A Lincoln J. Greenhill
%A Bryna J. Hazelton
%A Jacqueline N. Hewitt
%A Melanie Johnston-Hollitt
%A David L. Kaplan
%A Justin C. Kasper
%A Eric Kratzenberg
%A Colin J. Lonsdale
%A Mervyn J. Lynch
%A S. Russell McWhirter
%A Daniel A. Mitchell
%A Miguel F. Morales
%A Edward H. Morgan
%A Divya Oberoi
%A Stephen M. Ord
%A Thiagaraj Prabu
%A Alan E. E. Rogers
%A Anish A. Roshi
%A K. S. Srivani
%A Steven J. Tingay
%A Randall B. Wayth
%A Mark Waterson
%A Rachel L. Webster
%A Alan R. Whitney
%A Andrew J. Williams
%A Christopher L. Williams
%J Physics
%D 2014
%I arXiv
%R 10.1088/0004-637X/793/1/28
%X The detection of the Epoch of Reionization (EoR) in the redshifted 21-cm line is a challenging task. Here we formulate the detection of the EoR signal using the drift scan strategy. This method potentially has better instrumental stability as compared to the case where a single patch of sky is tracked. We demonstrate that the correlation time between measured visibilities could extend up to 1-2 hr for an interferometer array such as the Murchison Widefield Array (MWA), which has a wide primary beam. We estimate the EoR power based on cross-correlation of visibilities across time and show that the drift scan strategy is capable of the detection of the EoR signal with comparable/better signal-to-noise as compared to the tracking case. We also estimate the visibility correlation for a set of bright point sources and argue that the statistical inhomogeneity of bright point sources might allow their separation from the EoR signal.
%U http://arxiv.org/abs/1407.4620v1