-
Calibration Product Review for the GHRS - 09/97
The tables in this document provide a history (as of 1 Jul 1997) of the differences among the reference images and tables which were used by the Post Observation Data Processing System (PODPS) to calibrate GHRS data. This document can be used to fill in information that the Starview GHRS Reference file screen may not be able to provide.
-
Redetermination of Sensitivity for Grating G140L - Jun 97
We recently updated the archive with a new G140L baseline post-COSTAR sensitivity file (and accompanying wavelength net file) and also time-variable sensitivity files. The Reference File Additions page has been updated to reflect the additional files available.
-
Implementation of a Background Count Rate Model for the GHRS - Jun 97
CALHRS has been enhanced to allow users to choose to subtract a background model rather than observed background. Please read the Instrument Science Report for more details. The Reference File Additions page has been updated to reflect the additional files available.
-
Multigroup G140L Flat-field files - Mar 97
We recently noticed that the first and last points of the multigroup G140L flat-field files in CDBS (ga41342hz.r1h and ga41342iz.r1h) are INDEF instead of 1. and thereby cause a slight problem when used to calibrate one's data. New files (
h3e1400fz.r1handh3e1400gz.r1h) have been put into CDBS to correct the problem. -
Photocathode Granularity Maps for G140L - 10/96
Flat field files for use with GHRS G140L data are now available from the Calibration Database (CDBS) and the archive. ISR-076 gives details of when it is appropriate to recalibrate your data with the new flat field files (photocathode granularity maps). The new files are not intended for installation into the Routine Science Data Processing (OPUS) pipeline.
