An absolute calibration of DENIS (deep near infrared southern sky survey)

Details An absolute calibration of DENIS (deep near infrared southern sky survey) An absolute calibration of DENIS (deep near infrared southern sky survey)

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26as..141..313f&link_type=abstract

Astronomy and Astrophysics Supplement, v.141, p.313-317

Astronomy and Astrophysics

Astrophysics

51

Surveys, Infrared: General, Instrumentation: Miscellaneous

Scientific paper

An absolute calibration of the DENIS photometric system is presented. It includes the determination of the overall transmission profiles in the 3 bands, namely i, J and K_s, combining contributions from atmosphere, telescope mirrors, instrument lenses and dichroics, filters, and detectors. From these normalized profiles, isophotal and effective wavelengths are computed, using the same synthetic Vega spectrum as that used to support the absolute calibration of many other ground-based and spaceborne photometric systems. Flux densities at zero magnitude are derived and integrated to give in-band fluxes, which are used to compute theoretical zero-points and compare them to observed ones, yielding estimates of the overall throughput of the whole system.

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