KI Nulling Data Products

In the Nuller mode the main science data measurment is the coherent null leakage, nominally equal to one minus 1/2 of the visibility amplitude squared for a given source. Integrations on the target source and calibrators are interleaved in time. Each integration includes all local (detector, background) calibrations.

As with the V² mode, the MSC will reduce the raw data and provide average null values (Level 1 data) in a set of files available through the KI database as either ASCII or FITS files. The MSC will also provide the programs necessary to calibrate the Level 1 data for the system response. After this calibration, the data are ready for astrophysical modeling and interpretation.

Level 1 Nulling files