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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
New 145MHz source measurements by paper in the southern sky
Astrophysical Journal Letters, Volume 734, No. 2 PART 2, Article L34, Year 2011
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Description
We present observations from the Precision Array for Probing the Epoch of Reionization (PAPER) in South Africa, observed in 2010 May and September. Using two nights of drift scanning with PAPER's 60° FWHM beam we have made a map covering the entire sky below +10° declination with an effective center frequency of 145MHz, a 70MHz bandwidth, and a resolution of 26′. A 4800 deg2 region of this large map with the lowest Galactic emission reaches an rms of 0.7 Jy. We establish an absolute flux scale using sources from the 160MHz Culgoora catalog. Using the 408MHz Molonglo Reference Catalog (MRC) as a finding survey, we identify counterparts to 480 sources in our maps and compare our fluxes to the MRC and to 332 sources in the Culgoora catalog. For both catalogs, the ratio of PAPER to catalog flux averages to 1, with a standard deviation of 50%. This measured variation is consistent with comparisons between independent catalogs observed at different bands. The PAPER data represent new 145MHz flux measurements for a large number of sources in the band expected to encompass cosmic reionization and represents a significant step toward establishing a model for removing foregrounds to the reionization signal. © 2011. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Jacobs, Daniel C.
United States, Philadelphia
University of Pennsylvania
Aguirre, James E.
United States, Philadelphia
University of Pennsylvania
Parsons, Aaron R.
United States, Berkeley
University of California, Berkeley
Pober, Jonathan C.
United States, Berkeley
University of California, Berkeley
Bradley, Richard F.
United States, Charlottesville
University of Virginia
United States, Charlottesville
National Radio Astronomy Observatory
Chris L. Carilli, Christopher L.
United States, Socorro
National Radio Astronomy Observatory Socorro
Gugliucci, Nicole E.
United States, Charlottesville
University of Virginia
Manley, Jason R.
South Africa, Cape Town
Karoo Array Telescope
Van Der Merwe, Carel
South Africa, Cape Town
Karoo Array Telescope
Moore, David F.
United States, Philadelphia
University of Pennsylvania
Parashare, Chaitali R.
United States, Charlottesville
University of Virginia
Statistics
Citations: 40
Authors: 11
Affiliations: 6
Identifiers
Doi:
10.1088/2041-8205/734/2/L34
ISSN:
20418205
e-ISSN:
20418213
Research Areas
Environmental
Study Design
Cross Sectional Study
Study Approach
Quantitative
Study Locations
South Africa