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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.
Crédit:ESO
À propos de l'image
| Identification: | eso0730b |
| Type: | Observation |
| Date de publication: | 6 juillet 2007 |
| Communiqués de presse en rapport: | eso0730 |
| Taille: | 2781 x 387 px |
À propos de l'objet
| Nom: | PKS 1251-407 |
| Type: | Early Universe : Galaxy : Activity : AGN : Quasar |
| Distance: | z=4.46 (redshift) |
| Catégorie: | Quasars and Black Holes |
Couleurs & filtres
| Domaine | Télescope |
|---|---|
| Infrarouge | MPG/ESO 2.2-metre telescope GROND |
| Visible | MPG/ESO 2.2-metre telescope GROND |