Abstract
The Calibrated Infrared Source (CIRCE) is a radiometrically calibrated, highly uniform, infrared source for the calibration of the Hubble Space Telescope Near Infrared Camera and Multi-Object Spectrometer (NICMOS) instrument. The CIRCE output encompasses the entire NICMOS spectral range, from 0.8 to 2.5 micrometers . CIRCE is designed to operate in vacuum, thus allowing calibration of NICMOS under flight- like conditions. CIRCE is the calibration standard for several tests, including: throughput measurement, flat fields, sensitivity, polarizer characterization, and Red Leak Test.
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