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Processing of Digital Plates1.2m of Baldone Observatory Schmidt Telescope
- Source :
- Open Astronomy, Vol 26, Iss 1, Pp 7-17 (2017)
- Publication Year :
- 2017
- Publisher :
- De Gruyter, 2017.
-
Abstract
- The aim of this research is to evaluate accuracy of Plate Processing Method and to perform a detailed study of the Epson Expression 10000XL scanner, which was used to digitize plates from the database collection of the 1.2 m Schmidt Telescope installed in the Baldone Observatory. Special software developed in LINUX/MIDAS/ROMAFOT environment was used for processing the scans. Results of the digitized files with grey gradations of 8- and 16-bits were compared; an estimation of the accuracy of the developed method for rectangular coordinates determination and photometry was made. Errors in the instrumental system are ±0.026 pixels and ±0.024m for coordinates and stellar magnitudes respectively. To evaluate the repeatability of the scanner’s astrometric and photometric errors, six consecutive scans of one plate were processed with a spatial separation of 1200 dpi. The following error estimations are obtained for stars brighter than U< 13.5m: σxy = ±0.021 to 0.027 pixels and σm = ±0.014m to 0.016m for rectangular coordinates and instrumental stellar magnitudes respectively.
Details
- Language :
- English
- ISSN :
- 25436376
- Volume :
- 26
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- Open Astronomy
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.3cb2e91bbff49e493c21655f6487a17
- Document Type :
- article
- Full Text :
- https://doi.org/10.1515/astro-2017-0006