Instrument Handbook for the Goddard High Resolution Spectrograph (GHRS): For the Post-COSTAR Observatory in Cycle 5 of the HST Science MissionDavid R. Soderblom |
From inside the book
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Page 26
... offset from a nearby point source or at the least the pointing can be specified from an early acquisition image . Interactive acquisitions should be necessary only rarely . Another method is to acquire the object with the FOS and then ...
... offset from a nearby point source or at the least the pointing can be specified from an early acquisition image . Interactive acquisitions should be necessary only rarely . Another method is to acquire the object with the FOS and then ...
Page 39
... offset from a smaller object which can be centered . The second class of objects includes the Gallilean satellites of Jupiter , and it is these for which the LOCATE = EXTENDED acquisition option was written . In a normal LOCATE , the ...
... offset from a smaller object which can be centered . The second class of objects includes the Gallilean satellites of Jupiter , and it is these for which the LOCATE = EXTENDED acquisition option was written . In a normal LOCATE , the ...
Page 40
... offset , peakup on the target ( if desired ) , and a science observation . The first line would request an onboard acquisition of the reference star . It should specify ONBOARD ACQ FOR < line 2 > . Line 2 should then be an ACQ / PEAKUP ...
... offset , peakup on the target ( if desired ) , and a science observation . The first line would request an onboard acquisition of the reference star . It should specify ONBOARD ACQ FOR < line 2 > . Line 2 should then be an ACQ / PEAKUP ...
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