Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/5990
Title: | Study of redshifted H I from the epoch of reionization with drift scan |
Authors: | Paul, Sourabh Sethi, S.K. Subrahmanyan, Ravi Udaya Shankar, N. Dwarakanath, K.S. Deshpande, A.A. Srivani, K.S. +25 Co-authors |
Issue Date: | 20-Sep-2014 |
Publisher: | IOP Sciences for The American Astronomical Society |
Citation: | Astrophysical Journal, 2014, Vol.793, p 28 |
Abstract: | 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 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, which has a wide primary beam. We estimate the EoR power based on a cross-correlation of visibilities over time and show that the drift scan strategy is capable of detecting the EoR signal with a signal to noise that is comparable/better 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. |
Description: | Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations |
URI: | http://hdl.handle.net/2289/5990 |
ISSN: | 0004-637X 1538-4357-(Online) |
Alternative Location: | http://adsabs.harvard.edu/abs/2014ApJ...793...28P http://arxiv.org/abs/1407.4620 http://dx.doi.org/10.1088/0004-637X/793/1/28 |
Copyright: | 2014 American Astronomical Society, This article may be downloaded for personal use only. Any other use requires prior permission of the author and The American Astronomical Society |
Appears in Collections: | Research Papers (A&A) |
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File | Description | Size | Format | |
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2014_AphyJ_793_28.pdf Restricted Access | Restricted Access | 2.18 MB | Adobe PDF | View/Open Request a copy |
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