Science-advisor
REGISTER info/FAQ
Login
username
password
     
forgot password?
register here
 
Research articles
  search articles
  reviews guidelines
  reviews
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
 
 
Stat
Members: 3643
Articles: 2'479'597
Articles rated: 2609

19 March 2024
 
  » arxiv » 1505.6041

 Article overview


GLEAM: The GaLactic and Extragalactic All-sky MWA survey
R. B. Wayth ; E. Lenc ; M. E. Bell ; J. R. Callingham ; K. S. Dwarakanath ; T. M. O. Franzen ; B.-Q. For ; B. Gaensler ; P. Hancock ; L. Hindson ; N. Hurley-Walker ; C. A. Jackson ; M. Johnston-Hollitt ; A. D. Kapinska ; B. McKinley ; J. Morgan ; A. R. Offringa ; P. Procopio ; L. Staveley-Smith ; C. Wu ; Q. Zheng ; C. M. Trott ; G. Bernardi ; J. D. Bowman ; F. Briggs ; R. J. Cappallo ; B. E. Corey ; A. A. Deshpande ; D. Emrich ; R. Goeke ; L. J. Greenhill ; B. J. Hazelton ; D. L. Kaplan ; J. C. Kasper ; E. Kratzenberg ; C. J. Lonsdale ; M. J. Lynch ; S. R. McWhirter ; D. A. Mitchell ; M. F. Morales ; E. Morgan ; D. Oberoi ; S. M. Ord ; T. Prabu ; A. E. E. Rogers ; A. Roshi ; N. Udaya Shankar ; K. S. Srivani ; R. Subrahmanyan ; S. J. Tingay ; M. Waterson ; R. L. Webster ; A. R. Whitney ; A. Williams ; C. L. Williams ;
Date 22 May 2015
AbstractGLEAM, the GaLactic and Extragalactic All-sky MWA survey, is a survey of the entire radio sky south of declination +25 deg at frequencies between 72 and 231 MHz, made with the Murchison Widefield Array (MWA) using a drift scan method that makes efficient use of the MWA’s very large field-of-view. We present the observation details, imaging strategies and theoretical sensitivity for GLEAM. The survey ran for two years, the first year using 40 kHz frequency resolution and 0.5 s time resolution; the second year using 10 kHz frequency resolution and 2 s time resolution. The resulting image resolution and sensitivity depends on observing frequency, sky pointing and image weighting scheme. At 154 MHz the image resolution is approximately 2.5 x 2.2/cos(DEC+26.7) arcmin with sensitivity to structures up to ~10 deg in angular size. We provide tables to calculate the expected thermal noise for GLEAM mosaics depending on pointing and frequency and discuss limitations to achieving theoretical noise in Stokes I images. We discuss challenges, and their solutions, that arise for GLEAM including ionospheric effects on source positions and linearly polarised emission, and the instrumental polarisation effects inherent to the MWA’s primary beam.
Source arXiv, 1505.6041
Services Forum | Review | PDF | Favorites   
 
Visitor rating: did you like this article? no 1   2   3   4   5   yes

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 claudebot






ScienXe.org
» my Online CV
» Free


News, job offers and information for researchers and scientists:
home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2024 - Scimetrica