Homography-based correction of positional errors in MRT survey
| dc.additional | Proceedings of the conference held 8-12 December 2008, at National Centre for Radio Astrophysics (NCRA), TIFR, Pune, India. Edited by D. J. Saikia, D. A. Green, Y. Gupta, and T. Venturi. San Francisco: Astronomical Society of the Pacific. | en |
| dc.contributor.author | Nayak, Arvind | |
| dc.contributor.author | Daiboo, Soobash | |
| dc.contributor.author | Shankar, N Udaya | |
| dc.date.accessioned | 2011-08-24T05:42:59Z | |
| dc.date.available | 2011-08-24T05:42:59Z | |
| dc.date.issued | 2009-09 | |
| dc.description | Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations) | en |
| dc.description.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. | en |
| dc.identifier.citation | ASP Conference Series, 2009, Vol.407, p426 | en |
| dc.identifier.uri | http://hdl.handle.net/2289/4143 | |
| dc.language.iso | en | en |
| dc.publisher | Astronomical Society of the Pacific | en |
| dc.relation.uri | http://adsabs.harvard.edu/abs/2009ASPC..407..426N | en |
| dc.relation.uri | http://arxiv.org/abs/0905.0880 | en |
| dc.rights | 2009 Astronomical Society of the Pacific. | en |
| dc.title | Homography-based correction of positional errors in MRT survey | en |
| dc.type | Article | en |