The COSMOS NIR Survey with INGRID

Details The COSMOS NIR Survey with INGRID The COSMOS NIR Survey with INGRID

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ingn....6...11b&link_type=abstract

The Newsletter of the Isaac Newton Group of Telescopes (ING Newsl.), issue no. 6, p. 11-13.

Mathematics

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1

Nir Survey, Ingrid

Scientific paper

Towards the end of the last decade, the international astronomical community realised that exploitation of the new generation of 8-10-m class telescopes would be hampered unless surveys of the sky with suitable depth were carried out. Deep surveys aimed at the study of distant galaxies require NIR imaging in order to cope with the cosmological redshift of the galaxy spectral energy distributions (SEDs). In 2000 our group started a deep survey in the Ks-band using INGRID on the WHT and Omega Prime on the CAHA 3.5-m telescope. Our target depth is Ks=22 in AB magnitudes. Good La Palma seeing and better noise behaviour allows us to reach this depth in 2 hr exposures with INGRID, the CAHA/Omega data being about 1 mag. shallower for equal exposure times. On the other hand, the wider field of Omega allows a faster coverage of sky area. Our survey, deemed the COSMOS Survey, thus has two depth regimes, KAB=21 on a wide area and KAB=22 on the deeper areas mapped with INGRID.

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