+----------------------------------------------------------+ | HST Spectroscopy | STScI Analysis Newsletter | STIS/GHRS/FOS | December 2004 +----------------------------------------------------------+ Visit the "New in the Last 45 Days" section of the STIS website at http://www.stsci.edu/hst/stis for new information about STIS. This and previous issues of the STAN can be found at http://www.stsci.edu/hst/stis/documents/newsletters. CONTENTS: -Update on STIS Situation -Calibration Close-out Highlights -Doppler Correction Errors -Cross-dispersion Plate Scale Corrections -CALSTIS V2.17 Release Notes -Support for STIS Imaging Data in Multidrizzle -Recently published Instrument Science Reports (ISRs) -Fix for CALHRS flux error +----------------------------------------------------------+ Update on STIS Situation We provide an update on the current status of STIS operations and future plans for the instrument. Calibration Close-out Highlights Over the next 1-2 years we hope to make a number of improvements to the STIS calibration software and reference files, with the goal of generating a "final" calibration of as many STIS observing modes as possible. We invite the user community to send suggestions on calibration improvements. Doppler Correction Errors We report on two errors in the Doppler correction, one that affected MAMA TIME-TAG data files retrieved before 2004-Apr-21, and an older error that affected MAMA E140M data taken prior to 2000-Mar-01. Cross-dispersion Plate Scale Corrections The cross-dispersion plate scale values used in the OTFR pipeline were initially set using pre-launch estimates. These values have recently been updated with more accurate values determined using on-orbit data. CALSTIS V2.17 Release Notes CALSTIS 2.17 was released on 2004-Nov-11 in the new STSDAS release, Version 3.3. It is anticipated that this version of CALSTIS will be implemented in the OTFR pipeline as part of OPUS build 15.5 in 2005-January. Important note: An error in the final build of the STSDAS 3.3 package caused several IRAF scripts for the fringe-flat tasks in the STIS package to be corrupted. The corrected versions of these scripts and instructions for installing them have been made available. Support for STIS Imaging Data in Multidrizzle A new version of Multidrizzle was included in the release of STSDAS V3.3. Multidrizzle creates cosmic-ray cleaned, geometric distortion corrected mosaics from multiple input images. Limited testing has been done for the application of Multidrizzle to STIS imaging data. Users should check the instrument-specific notes on the use of Multidrizzle. Recently published Instrument Science Reports (ISRs) ISR 2004-06: STIS Cycle 10 Calibration Close-out Report ISR 2004-05: STIS CCD Imaging Throughputs ISR 2004-04: Time-Dependent Sensitivity of the CCD and MAMA First-Order Modes ISR 2004-03: Full-field Sensitivity of STIS CCD Imaging and its Temporal Dependence +----------------------------------------------------------+ | GHRS +----------------------------------------------------------+ Fix for CALHRS flux error A fix for certain CALHRS flux calibration errors is included in the release of STSDAS V3.3. +----------------------------------------------------------+ | Need help? http://www.stsci.edu/hst/stis/help.html +----------------------------------------------------------+ | To subscribe or unsubscribe to the STAN, send a message | to majordomo@stsci.edu with a blank subject line and | the following in the body: [un]subscribe stis_news +----------------------------------------------------------+ | The Space Telescope Science Institute is operated by the | Association of Universities for Research in Astronomy, | Inc., under NASA contract NAS5-26555. +----------------------------------------------------------+
