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  1. August 2023 STAN

    August 25, 2023
    STIS NEWSLETTERS

    This STAN is focused on providing information and guidelines for the preparation and submission of HST Cycle 31 GO phase II proposals, for both new and experienced users of STIS. The first section gives an updated listing of policies, tips, and tricks for preparing successful phase II proposals. The section on STIS instrument news includes new recommendations for wavecal exposure times for some FUV settings. The section on STIS resources lists some recently developed software tools for the examination and analysis of STIS data and notes several recent STIS presentations and Instrument Science Reports.

  2. July 2023 STAN

    August 1, 2023
    STIS NEWSLETTERS

    In this STAN, we announce the delivery and implementation of updates to the reference files for the STIS NUV time-dependent sensitivity and for selected STIS spectroscopic and imaging modes contained in the third installment of the STIS flux recalibration effort.

  3. May 2023 STAN

    May 31, 2023
    STIS NEWSLETTERS

    In this STAN we announce the alpha release of the Pandeia-based ETC for HST instruments and the complete delivery of the updated G750L reference file. 

  4. April 2023 STAN

    April 3, 2023
    STIS NEWSLETTERS

    In this STAN, the STIS Team presents Cycle 31 updates to documentation and news to STIS users submitting Phase I proposals, including updates to the FUV-MAMA dark rate adopted for ETC v31.1. Additionally, we recapitulate STIS' posters and presentations at the 241st AAS Winter conference that may also assist users submitting a proposal.

  5. January 2023 STAN

    January 5, 2023
    STIS NEWSLETTERS

    In this STAN we announce the delivery of updated reference files for the second STIS flux recalibration release and a presentation poster detailing these updates at the upcoming winter AAS, new introductory Jupyter Notebooks, and the stenv migration.

  6. July 2022 STAN

    July 6, 2022
    STIS NEWSLETTERS

    This STAN discusses policies, tips and tricks for preparing and submitting Phase II Proposals ahead of the Cycle 30 Phase II deadline. It also includes STIS instrument news on exposure times for wavecals. The third article summarizes the latest software tools for data analysis, namely Coronagraphy Visualization tool, Defringing package, and a DrizzlePac notebook. The final article provides summaries of recent STIS presentations, Instrument Science Reports, and papers.

  7. April 2022 STAN

    April 20, 2022
    STIS NEWSLETTERS

    In this STAN we announce the delivery of updated reference files for the first STIS flux recalibration release and a new Jupyter Notebook for aligning and combining STIS images with DrizzlePac.

  8. March 2022 STAN

    March 7, 2022
    STIS NEWSLETTERS

    This STAN includes updates to the available STIS observing modes for Cycle 30 Phase I and details of the increased temperature of STIS following its latest recovery.

  9. October 2021 STAN

    October 8, 2021
    STIS NEWSLETTERS

    In this STAN we announce the delivery of a new version of the Image Photometry Table (IMPHTTAB) for STIS and the end of HSTCAL support for RHEL 6.

  10. August 2021 STAN

    August 25, 2021
    STIS NEWSLETTERS

    Given the changes in the spectral energy distributions (SEDs) of the three primary standards, and re-examination of the spectral flux of Vega, all of the HST flux calibrations are being updated to achieve the originally established precision. The STIS team is currently working on deriving new zeropoints and sensitivity curves for the different imaging and spectroscopic modes. In this STAN article, we cover the updated timeline and plan for a total of four flux recalibration releases. We also present a new STIS Flux Recalibration webpage that will contain the latest information on the recalibration effort.

  11. July 2021 STAN

    July 21, 2021
    STIS NEWSLETTERS

    This STAN offers a set of tips and tricks for preparing and submitting Phase II Proposals ahead of the Cycle 29 Phase II deadline. Additionally, this STAN also provides an article discussing the defringing of STIS CCD G750M/G750L spectra.

  12. March 2021 STAN

    March 25, 2021
    STIS NEWSLETTERS

    This STAN provides information regarding the updates made to the STIS Exposure Time Calculator (ETC) for Cycle 29 Phase I, an update to the new STIS CCD spatial scanning mode, STIS news from the recent AAS, and the preliminary release of a Coronagraphic Visualization Tool for preparing STIS coronagraphic observations.

  13. September 2020 STAN

    September 4, 2020
    STIS NEWSLETTERS

    Spatial scanning with the STIS CCD is an available-but-unsupported mode for obtaining high S/N ratio spectra of relatively bright targets by trailing the target in the spatial direction within one of the long STIS apertures. Spatial scanning offers particular advantages for red and near-IR spectra (where ground-based observations can be severely contaminated by telluric absorption and where the STIS CCD spectra are affected by fringing) and for accurate monitoring of stellar fluxes. In this article, we briefly summarize results from the analysis of scanned spectra of the well-known exoplanet host star 55 Cnc that were obtained for a special calibration program designed to assess the flux stability achievable with this observing mode.

  14. July 2020 STAN

    July 23, 2020
    STIS NEWSLETTERS

    This STAN provides information about updates to CALSPEC and the schedule for implementing changes to flux calibration for HST instruments, a discussion about how to access the correct coordinates for targets with proper motions in APT, and an update on the STIS python defringing tools, which are now available in the stistools package.

  15. June 2020 STAN

    June 11, 2020
    STIS NEWSLETTERS

    Ahead of the upcoming Cycle 28 Phase II deadline, this STAN provides information regarding STIS best practices for submitting Phase II's. In addition, information regarding updates to the STIS Exposure Time Calculator for Cycle 28 Phase II, new posters from the recent American Astronomical Society meeting, and information regarding the recent redelivery of several super-dark and super-bias reference files is available in this STAN.

 

Last Updated: 07/24/2023

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