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Calibration update of the COMBO-17 CDFS catalogue

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arxiv 0809.2066 v2 pith:5FXYW2PC submitted 2008-09-11 astro-ph

Calibration update of the COMBO-17 CDFS catalogue

classification astro-ph
keywords galaxiescalibrationcataloguecombo-17photometricupdateaccuratebecome
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present an update to the photometric calibration of the COMBO-17 catalogue on the Extended Chandra Deep Field South, which is now consistent with the GaBoDS and MUSYC catalogues. As a result, photometric redshifts become slightly more accurate, with <0.01 rms and little bias in the delta_z/(1+z) of galaxies with R<21 and of QSOs with R<24. With increasing photon noise the rms of galaxies reaches 0.02 for R<23 and 0.035 at R~23.5. Consequences for the rest-frame colours of galaxies at z<1 are discussed.

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