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A Large Spectral Class Dependence of the Wilson-Bappu Effect among Luminous Stars
Parsons, Sidney B.
The striking correlation between Ca II K-line emission width and absolute visual magnitude has not previously been well calibrated for stars more luminous than giants. From a sample of binary systems fit to isochrones, we find deviations of more than 2 mag, correlated with spectral class, between these binarity Mv values and the Wilson-…
Properties of PACE-I HgCdTe Detectors in Space: The NICMOS Warm-Up Monitoring Program
Nota, A.; Calzetti, D.; Böker, T. +13 more
We summarize the results of a monitoring program which was executed following the cryogen exhaustion of the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) on board the Hubble Space Telescope. During the subsequent warm-up, detector parameters such as detective quantum efficiency, dark current, bias offsets, and saturation levels have …