The Representation of OTA Images’ Astrometric Results with WCS-SIP Coefficientstwo
| Autor: | Yi-ding Ping, Chen Zhang, Chun-lin Lu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Brightness Polynomial 010308 nuclear & particles physics business.industry Coordinate system Astrophysics::Instrumentation and Methods for Astrophysics Astronomy and Astrophysics Astrometry 01 natural sciences Optical telescope Computer Science::Other Image (mathematics) Space and Planetary Science Position (vector) 0103 physical sciences Computer vision Artificial intelligence Representation (mathematics) business 010303 astronomy & astrophysics |
| Zdroj: | Chinese Astronomy and Astrophysics. 42:267-278 |
| ISSN: | 0275-1062 |
| DOI: | 10.1016/j.chinastron.2018.04.006 |
| Popis: | Cross-matching the sources in the observed image with the star catalogs or earlier records is a necessary procedure for detecting the position or brightness variation of a specific source in the Optical Telescopes Array (OTA) survey. Therefore, knowing the celestial positions of these objects on the observed image is prerequisite. A method based on matrix manipulation is applied to converting the existing plate constants of OTA images into the World Coordinate System (WCS) and Simple Imaging Polynomial (SIP) coefficients, and recording such mapping relations on the FITS (Flexible Image Transport System) files of OTA for the convenience of use. The improvement on the astrometry of OTA resulted by this method, as well as the discussion about some problems of the OTA astrometry are also presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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