A Flux Scale for Southern Hemisphere 21cm EoR Experiments
Daniel C. Jacobs, Aaron R. Parsons, James E. Aguirre, Zaki Ali, Judd, Bowman, Richard F. Bradley, Christopher L. Carilli, David R. DeBoer, Matthew, Dexter, Nicole E. Gugliucci, Pat Klima, Dave H. E. MacMahon, Jason R. Manley,, David F. Moore, Jonathan C. Pober, Irina I. Stefan

TL;DR
This paper presents a new flux scale for southern hemisphere 21cm Epoch of Reionization experiments, improving calibration accuracy for sources like Pictor A, which enhances the reliability of EoR measurements.
Contribution
It introduces a method to calibrate source spectra with reduced beam calibration errors, achieving a tenfold improvement in flux measurement accuracy for key calibrators.
Findings
Derived a new flux model for Pictor A with 1.4% accuracy
Confirmed that Pictor A's spectrum follows a single power law between 100 MHz and 2 GHz
Provided a catalog of spectral measurements for 32 sources in the southern hemisphere
Abstract
We present a catalog of spectral measurements covering a 100-200 MHz band for 32 sources, derived from observations with a 64-antenna deployment of the Donald C. Backer Precision Array for Probing the Epoch of Reionization (PAPER) in South Africa. For transit telescopes such as PAPER, calibration of the primary beam is a difficult endeavor, and errors in this calibration are a major source of error in the determination of source spectra. In order to decrease reliance on accurate beam calibration, we focus on calibrating sources in a narrow declination range from -46d to -40d. Since sources at similar declinations follow nearly identical paths through the primary beam, this restriction greatly reduces errors associated with beam calibration, yielding a dramatic improvement in the accuracy of derived source spectra. Extrapolating from higher frequency catalogs, we derive the flux scale…
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