Research articles

search articles

My Pages

Stat

Members: 3645
Articles: 2'501'711
Articles rated: 2609

20 April 2024

» arxiv » 1308.0565

Article overview

A study of fundamental limitations to statistical detection of redshifted HI from the epoch of reionization
Nithyanandan Thyagarajan ; N. Udaya Shankar ; Ravi Subrahmanyan ; Wayne Arcus ; Gianni Bernardi ; Judd D. Bowman ; Frank Briggs ; John D. Bunton ; Roger J. Cappallo ; Brian E. Corey ; Ludi deSouza ; David Emrich ; Bryan M. Gaensler ; Robert F. Goeke ; Lincoln J. Greenhill ; Bryna J. Hazelton ; David Herne ; Jacqueline N. Hewitt ; Melanie Johnston-Hollitt ; David L. Kaplan ; Justin C. Kasper ; Barton B. Kincaid ; Ronald Koenig ; Eric Kratzenberg ; Colin J. Lonsdale ; Mervyn J. Lynch ; S. Russell McWhirter ; Daniel A. Mitchell ; Miguel F. Morales ; Edward H. Morgan ; Divya Oberoi ; Stephen M. Ord ; Joseph Pathikulangara ; Ronald A. Remillard ; Alan E. E. Rogers ; Anish A. Roshi ; Joseph E. Salah ; Robert J. Sault ; K. S. Srivani ; Jamie B. Stevens ; Prabu Thiagaraj ; Steven J. Tingay ; Randall B. Wayth ; Mark Waterson ; Rachel L. Webster ; Alan R. Whitney ; Andrew J. Williams ; Christopher L. Williams ; J. Stuart B. Wyithe ;
Date:	2 Aug 2013
Abstract:	In this paper we explore for the first time the relative magnitudes of three fundamental sources of uncertainty, namely, foreground contamination, thermal noise and sample variance in detecting the HI power spectrum from the Epoch of Reionization (EoR). We derive limits on the sensitivity of a Fourier synthesis telescope to detect EoR based on its array configuration and a statistical representation of images made by the instrument. We use the Murchison Widefield Array (MWA) configuration for our studies. Using a unified framework for estimating signal and noise components in the HI power spectrum, we derive an expression for and estimate the contamination from extragalactic point-like sources in three-dimensional k-space. Sensitivity for EoR HI power spectrum detection is estimated for different observing modes with MWA. With 1000 hours of observing on a single field using the 128-tile MWA, EoR detection is feasible (S/N > 1 for $klesssim 0.8$ Mpc$^{-1}$). Bandpass shaping and refinements to the EoR window are found to be effective in containing foreground contamination, which makes the instrument tolerant to imaging errors. We find that for a given observing time, observing many independent fields of view does not offer an advantage over a single field observation when thermal noise dominates over other uncertainties in the derived power spectrum.
Source:	arXiv, 1308.0565
Services:	Forum \| Review \| PDF \| Favorites

No review found.

Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

ScienXe.org
» my Online CV
» Free

News, job offers and information for researchers and scientists:

home

contact

sitemap