+----------------------------------------------------------+ | HST Spectroscopy | STScI Analysis Newsletter | STIS/GHRS/FOS | October/November 2006 +----------------------------------------------------------+ 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: -New Post-Analysis Tasks Available -New Reference File Deliveries -Echelle Flux Calibration Improvements -CALSTIS Updates V2.22 and V2.23 -Uniform Recalibration of All STIS Data -Recently Published Instrument Science Reports (ISRs) +----------------------------------------------------------+ New Post-Analysis Tasks Available Several new IRAF/STSDAS tasks have been made available to provide corrections for CTE loss and spectral traces, and to provide a new interpolation algorithm for the 2-D rectification of spectral images. These tasks will be included in the STIS package in the upcoming fall STSDAS release. New Reference File Deliveries A number of new STIS calibration reference files have recently been delivered as part of the STIS calibration closeout effort. The calibration improvements resulting from these deliveries include better flux calibration, improved location and alignment of spectral traces, and updates to the STIS MAMA detector darks. Echelle Flux Calibration Improvements On 2006-Nov-03 new photometric throughput (pht) reference files were delivered that provide significant improvements to the absolute flux calibration for 1-D extractions of STIS echelle high- and medium-resolution modes. These improvements include on-orbit revised sensitivities for all prime and secondary wavelength settings and updated coefficients for the blaze shift corrections applied to the prime settings. Blaze shift corrections are now also included for the first time for the secondary settings. CALSTIS Updates V2.22 and V2.23 CALSTIS V2.22 is currently in use in OTFR. CALSTIS V2.23 will be included as part of the release of STSDAS 3.6. Some of the changes include improved calibration of echelle blaze function shifts and correction of spectral traces for rotation of the trace position on the detector. Uniform Recalibration of All STIS Data We describe the current status of plans to recalibrate all STIS data obtained prior to the STIS Side 2 failure on 2004-Aug-03. Recently Published Instrument Science Reports (ISRs) ISR 2006-04: Sensitivity of STIS First-Order Medium Resolution Modes ISR 2006-03: A new CTE Correction Algorithm for Point Source Spectroscopy with the STIS CCD: Correcting for charge trap filling by the 'red halo' of the CCD Point Spread Function redward of 8000 A +----------------------------------------------------------+ | 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. +----------------------------------------------------------+
