A Quasar in Different Colours

GROND images of the quasar PKS 1251-407. GROND observes simultaneously through 7 different filters in the visible and near-infrared, providing 7 images of the same object. In this case, the quasar appears much fainter in the blue images (the so-called Lyman drop-out), an indication of the quasar's distance.

Credit:

ESO

About the Image

Id:eso0730b
Type:Observation
Release date:6 July 2007
Related releases:eso0730
Size:2781 x 387 px

About the Object

Name:PKS 1251-407
Type:• Early Universe : Galaxy : Activity : AGN : Quasar
• X - Quasars & Black Holes
Distance:z=4.46 ()

Image Formats

Fullsize Original
529.5 KB
Large JPEG
251.5 KB
Screensize JPEG
57.1 KB

Colours & filters

BandTelescope
OpticalMPG/ESO 2.2-metre telescope
GROND
InfraredMPG/ESO 2.2-metre telescope
GROND

 

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