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|Title: ||Homography-based correction of positional errors in MRT survey|
|Authors: ||Nayak, Arvind|
Udaya Shankar, N.
|Issue Date: ||Sep-2009 |
|Publisher: ||Astronomical Society of the Pacific|
|Citation: ||ASP Conference Series, 2009, Vol.407, p426|
|Abstract: ||The Mauritius Radio Telescope (MRT) images show systematics in the positional errors of sources when compared to source positions in the Molonglo Reference Catalogue (MRC). We have applied two-dimensional homography to correct positional errors in the image domain and avoid re-processing the visibility data. Positions of bright (above 15 σ) sources, common to MRT and MRC catalogues, are used to set up an over-determined system to solve for the 2-D homography matrix. After correction, the errors are found to be within 10% of the beamwidth for these bright sources and the systematics are eliminated from the images.|
|Description: ||Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)|
|Alternative Location: ||http://adsabs.harvard.edu/abs/2009ASPC..407..426N|
|Copyright: ||2009 Astronomical Society of the Pacific.|
|Appears in Collections:||Research Papers (A&A)|
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