Ks-Band Image of Distant Radio Galaxy
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Ks-Band Image of Distant Radio Galaxy

May 16, 2005
This photo is a Ks (2.16µm) image, centred on the distant radio galaxy MRC0316-257 (redshift z = 3.14). It was obtained primarily to locate other distant galaxies for future spectroscopic observations with ISAAC.

Technical Information: This image was obtained by combining 45 1-min exposures, taken with the telescope randomly offset by small amounts in between ("jittering") to allow subtraction of the bright sky emission at this wavelength. The seeing was 0.5 arcsec and the limiting magnitude is around Ks = 22. The field measures 2.5 x 2.5 arcmin with N at the top and E to the left.

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