Homography-Based Correction of Positional Errors in MRT Survey
| dc.creator | Nayak, Arvind | |
| dc.creator | Daiboo, Soobash | |
| dc.creator | Shankar, N. Udaya | |
| dc.date | 2009-05-06 | |
| dc.date.accessioned | 2026-07-07T13:12:19Z | |
| dc.date.available | 2026-07-07T13:12:19Z | |
| dc.description | 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. | |
| dc.description | 4 pages, 4 figures, The Low-Frequency Radio Universe, Proceedings of a conference held at NCRA-TIFR, Pune, 8-12 December 2008, ASP Conference Series, Vol. 407, 2009, Eds: D.J. Saikia, D.A. Green, Y. Gupta and T. Venturi | |
| dc.identifier | https://arxiv.org/abs/0905.0880 | |
| dc.identifier | http://arxiv.org/abs/0905.0880 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/229548 | |
| dc.subject | Instrumentation and Methods for Astrophysics | |
| dc.title | Homography-Based Correction of Positional Errors in MRT Survey | |
| dc.type | text |