CCD Observation of Diffuse Light in the Rich Cluster A:2029
Abstract
By mosaicking many CCD frames together, a large-scale (1/2 deg) R-band map of the cD cluster Abell 2029 has been constructed. The map was flat from one edge to the other to about 0.05 percent of the night sky, which corresponds to v(R) 30 mag sq arcsec. A novel technique involving the pixel distribution function, was used to measure diffuse light in the cluster out to 450 arcsec (500/h Kpc) along the minor axis of the cluster. In the elliptical region from minor radius 100 arcsec to minor radius 300 arcsec, the diffuse light corresponds to roughly 8 percent of the total cluster light. Data in other optical bands and on other clusters are in the process of being reduced. The applicability of the above technique to measurements of the fluctuations in the extragalactic background light is discussed.
- Publication:
-
The Galactic and Extragalactic Background Radiation
- Pub Date:
- 1990
- Bibcode:
- 1990IAUS..139..357B
- Keywords:
-
- Astronomical Maps;
- Charge Coupled Devices;
- Diffuse Radiation;
- Galactic Clusters;
- Light (Visible Radiation);
- Background Radiation;
- Extraterrestrial Radiation;
- Astronomy