... All observations following the failure and preceding the next baseline guide star acquisition will contain this keyword. ... Only possible value is T. (Guide star acquisition failure) . ... Only possible value is T. (Take Data Flag NOT on throughout observation.) ... The flag could be off for many reasons, some anomalous situations such as loss of lock, failed guide star acquisition, and others normal for the activity in progress, such as slewing during acquisition peak-ups or during spatial scans. ...
ST-ECF Instrument Science Report ACS-2006-03 Wavelength and Flux calibration of the ACS/HRC PR200L prism S. S. Larsen, J. Walsh and M. KЭmmel, March 2006 ABSTRACT Wavelength- and flux calibrations are presented for the ACS/HRC PR200L slitless spectroscopy mode. ... Wavelength solutions for the PR200L prism. ... Wavelength. ... 12 ST-ECF Instrument Science Report ACS-2006-03 Figure 7: Comparison of the aXe-extracted prism spectra of the two flux standards with the reference spectra. ...
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