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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
Over de afbeelding
| Id: | eso0730b |
| Type: | Observatie |
| Publicatiedatum: | 6 juli 2007 |
| Gerelateerde berichten: | eso0730 |
| Grootte: | 2781 x 387 px |
Over het object
| Naam: | PKS 1251-407 |
| Type: | Early Universe : Galaxy : Activity : AGN : Quasar |
| Afstand: | z=4.46 (roodverschuiving) |
| Categorie: | Quasars and Black Holes |
Kleuren & filters
| Band | Telescoop |
|---|---|
| Infrarood | MPG/ESO 2.2-metre telescope GROND |
| Optisch | MPG/ESO 2.2-metre telescope GROND |