Infrared spectrum of radio galaxy MRC 0406-244

A spectrum, covering the 1.6 - 2.45 micron infrared wavelength region was obtained with SOFI''s 'red grism' of the radio galaxy MRC 0406-244 showing the redshifted 'visible' [OIII] doublet (emission from double-ionized oxygen atoms at rest wavelength 4959A and 5007A) and H-alpha (6563 A) emission lines. The oxygen lines are seen to the left and the hydrogen line is in the right half of the diagramme. The 1.8 - 2.0 micron spectral region suffers from absorption in the terrestrial atmosphere and has been removed. After identifying the galaxy in a 1-min imaging exposure and centering it in the 2 arcsec wide entrance slit, four spectral exposures were obtained, each lasting 15 minutes, on two positions along the slit, to permit cancellation of sky emission lines and produce the 'clean' spectrum shown here.

Kredit:

ESO

O snímku

Id:eso9805f
Typ:Pozorování
Datum zveřejnění:29. ledna 1998
Související články:eso9805
Velikost:689 x 472 px

O objektu

Jméno:MRC 0406-244, Spectrum
Typ:Early Universe : Galaxy
Vzdálenost:z=2.44 (rudý posuv)
Kategorie:Galaxies

Image Formats


Barvy & filtry

PásmoDalekohled
Infračervený
Near-IR
New Technology Telescope
SOFI