Image merging software for imaging X-ray detectors on ROSAT : a status report based on simultated results.
Abstract
One of the algorithms that will be used for the image merging of both survey and pointed observations of the Rosat satellite is described. The algorithm is designed to deal efficiently with a large number of photons and to allow a planar representation of a large section of the sky preserving the distance of individual photons from the coordinate origin and the spherical angles defined by the triangle Photon-Origin-North. This representation, which is the spherical analogue of the planar polar coordinate representation, makes it possible to project the image without using the photon sky coordinates, saving computer time. An application of this technique to simulated observations is presented. The simulated images are compared with those obtained by the Einstein satellite.
- Publication:
-
Memorie della Societa Astronomica Italiana
- Pub Date:
- 1988
- Bibcode:
- 1988MmSAI..59..493C
- Keywords:
-
- Image Processing;
- Rosat Mission;
- Software Tools;
- X Ray Telescopes;
- Astronomical Coordinates;
- Computerized Simulation;
- Heao 2;
- Sky Surveys (Astronomy);
- Astronomy