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Results: 11
SEPTEMBER 4, 2020
STIS NEWSLETTERS

September 2020 STAN

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.

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JULY 23, 2020
STIS NEWSLETTERS

July 2020 STAN

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.

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JUNE 11, 2020
STIS NEWSLETTERS

June 2020 STAN

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.

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FEBRUARY 7, 2020
STIS NEWSLETTERS

February 2020 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.

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JULY 3, 2019
STIS NEWSLETTERS

July 2019 STAN

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.

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MARCH 19, 2019
STIS NEWSLETTERS

March 2019 STAN

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.

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NOVEMBER 1, 2018
STIS NEWSLETTERS

November 2018 STAN

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.

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JULY 1, 2018
STIS NEWSLETTERS

July 2018 STAN

This STAN provides various updates to STIS calibration, including the Exposure Time Calculator (ETC), the new E140M blaze shift reference file, the current levels and impact of jitter, spatial scanning, and the reprocessing status of pre-SM4 data.

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AUGUST 1, 2017
STIS NEWSLETTERS

August 2017 STAN

This STAN describes various updates to STIS calibration, including the geometric distortion, time dependent sensitivity, echelle blaze function, and the cosmic ray rejection algorithm.

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MARCH 1, 2017
STIS NEWSLETTERS

March 2017 STAN

In this STAN we provide updates on STIS to users preparing a program for the Cycle 25 HST Phase 1 deadline.

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AUGUST 1, 2016
STIS NEWSLETTERS

August 2016 STAN

This update brings new read noise values for the STIS/CCD and shares information on how to subscribe to separate STIS and COS STANs after the split in 2016.

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LAST UPDATED: 10/23/2020

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