The DLA galaxy at z=2.81 in front of PKS 0528-250.
This page is under construction. More images and text is coming soon.
Figure 1.
HST WFPC2 sub-pixelised image of a region 43'' by 17''
around the quasar PKS0528-250, showing the group of
three galaxies S1, S2, S3. The size of each sub--pixel
is 0.05 arcsec. The image is a weighted average of data from
30 orbits, and has been convolved with a Gaussian profile of
sigma=1.3 sub-pixel. An inset panel shows a small region to the
S (lower left) of the quasar after subtraction of the quasar
image, revealing the image of S1. The scale is shown by a horizontal
bar of length 3 arcsec, the orientation is N to the upper-right, E to
the upper left.
Figure 2.
This figure presents a comparison of images of S1 (top panel), S2
(middle panel) and S3 (bottom panel) in all HST bands. From left to
right the panels show: F450W (B), F467M, and F814 (I) filter data. For
the source S1 the quasar psf has been subtracted, and the low S/N F467M
images have been lightly smoothed. In panel 4 from the left
we show a weighted sum of all images, in panel 5 our best model fit
(using exponential profiles) to
the I band image and in panel 6 the residuals. All images
in this Figure are 2.0'' by 2.0'' with orientation as in Figure 1.