NDLI: Estimating Solar Flux Density at Low Radio Frequencies Using a Sky Brightness Model

Content Provider	Springer Nature Link
Author	Oberoi, Divya Sharma, Rohit Rogers, Alan E. E.
Copyright Year	2017
Abstract	Sky models have been used in the past to calibrate individual low radio frequency telescopes. In this article we generalize this approach from a single antenna to a two element interferometer, and formulate the problem in a way that allows us to estimate the flux density of the Sun using the normalized cross-correlations (visibilities) measured on a low resolution interferometric baseline. For wide field-of-view instruments, typically the case at low radio frequencies, this approach can provide robust absolute solar flux calibration for well characterized antennas and receiver systems. It can provide a reliable and computationally lean method for extracting parameters of physical interest using a small fraction of the voluminous interferometric data, which can be computationally prohibitively expensive to calibrate and image using conventional approaches. We demonstrate this technique by applying it to data from the Murchison Widefield Array and assess its reliability.
Starting Page	1
Ending Page	16
Page Count	16
File Format	PDF
ISSN	00380938
Journal	Solar Physics
Volume Number	292
Issue Number	6
e-ISSN	1573093X
Language	English
Publisher	Springer Netherlands
Publisher Date	2017-05-30
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sun: radio radiation Techniques: interferometric Astrophysics and Astroparticles Atmospheric Sciences Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics)
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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