Instrument Handbook for the Goddard High Resolution Spectrograph (GHRS): For the Post-COSTAR Observatory in Cycle 5 of the HST Science MissionDavid R. Soderblom |
Common terms and phrases
Accumulation Mode ACQ/PEAKUP acquisition count rates acquisition mirrors aperture arcsec automatically background BRIGHT and FAINT BRIGHT=RETURN Cardelli carrousel CENSOR coordinates COSTAR cross-dispersers crowded field Cycle dark count default Digicon dwell point EARLY ACQ early acquisition Ebbets Ech-B echelle gratings effects extended objects faint objects first-order gratings flux FLYLIM focus diodes FP-SPLIT GHRS Goddard High Resolution Handbook High Resolution Spectrograph HST's Hubble Space Telescope IMAGE mode instrument INT ACQ interactive acquisition Interstellar measured mirror N2 noise obtained offset ONBOARD ACQ onboard acquisition Optical option orbit OSCAN parameter PEAKUP Phase II Proposal photocathode pixels point source Point Spread Function predicted count rate scattered light Science Aperture science diodes science observations Section sensitivity Side signal-to-noise South Atlantic Anomaly spacecraft SPECIAL REQUIREMENTS specify spectra spectral type spectrum spiral search STEP-PATT STEP-TIME STScI substepping target acquisition target acquisition count TARGET NAME ultraviolet wavelength calibration WFPC2 WSCAN