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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
This STAN provides information regarding the updates made to the STIS Exposure Time Calculator (ETC) for Cycle 28 Phase I, news regarding the sensitivity recalibration of the E140M grating and the delivery of new PHOTTAB and RIPTAB files in support of this recalibration, updates to the NUV-MAMA dark rate, and the status of a new suite of Python STIS Defringing Tools.
This STAN provides information about best practices when submitting Phase II proposals, notification of a recently-published paper in JATIS regarding coronagraphy with STIS, details about the STIS data handbook update, and information about a new job opportunity at STScI.
This STAN provides information for Phase I proposals, including information about relevant posters presented at the most recent AAS in January, post-safing updates, and ETC updates.
This STAN provides various updates to STIS proposing, including changes to the STIS review process for PIs, common acquisition errors and how to avoid them, and how high jitter can impact coronagraphic data.