Detail of the AXAF Deep Field

Image showing a small area of the AXAF Deep Field at the original resolution. It measures about 5.8 x 6.5 arcmin 2, i.e. the area corresponds to approx. 1/30 of the full frame. The background is extremely crowded with very faint objects - most of these are galaxies at very large distances. Some of them are likely to be identified as strong X-ray emitters when this field is observed with the Chandra X-ray Observatory.

Twenty-eight exposures with a total integration time of 7 hours have been co-added. After each single exposure, the telescope was offset by a small angle in order to cover also the gaps between the eight CCD's in the mosaic and to enable removal of minor cosmetical blemishes of the detectors. Since the CCD mosaic of the WFI comprises 67 million pixels, a total of 1,900 million data points was thus used to construct this image. The related image processing, using the EIS WFI data reduction pipeline, recently developed at ESO, kept a powerful workstation fully busy for about 8 hours.

Crédit:

ESO

À propos de l'image

Identification:eso9954b
Type:Observation
Date de publication:21 décembre 1999
Communiqués de presse en rapport:eso9954
Taille:1440 x 1452 px

À propos de l'objet

Nom:AXAF Deep Field
Type:Early Universe : Galaxy : Grouping : Cluster
Catégorie:Galaxy Clusters

Formats des images

Grand JPEG
1,2 Mio
JPEG taille écran
728,0 Kio

Fonds d'écran

1024x768
485,1 Kio
1280x1024
816,9 Kio
1600x1200
1,1 Mio
1920x1200
1,2 Mio
2048x1536
1,7 Mio

Couleurs & filtres

DomaineTélescope
Visible
B
MPG/ESO 2.2-metre telescope
WFI