The detection of four high-redshift (0.5 much less than Z less than or equal to 3.22) radiogalaxies by optical spectroscopy of five blank fields

Astronomy and Astrophysics – Astronomy

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Astronomical Spectroscopy, Optical Emission Spectroscopy, Radio Galaxies, Red Shift, Charge Coupled Devices, Emission Spectra, Spectral Bands

Scientific paper

The optical detection of four high-redshift radiogalaxies is reported, including one, 6C1232 + 39 (4C39.37), with a redshift (z = 3.22) which puts it among the most distant galaxies known. These radiosources were unidentified on CCD images. The spectroscopic observations were made 'blind', using a long slit centered on the radio position and aligned with the radio structure. The advantages of this method of observing objects from radio-selected samples is discussed.

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