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Results: 73
OCTOBER 26, 2020
HST NEWS

HST Events at the 52nd Meeting of the Division for Planetary Sciences

The 52nd DPS meeting, held virtually, will provide solar system and exoplanet observers the opportunity to have their HST research questions regarding proposals and archive facilities answered.

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OCTOBER 23, 2020
COS NEWSLETTERS

October 2020 STAN

In this STAN we announce an update to the calculation of uncertainties in CalCOS and the delivery of new time-dependent sensitivity and photometric throughput tables for FUV observations.

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OCTOBER 15, 2020
WFC3 NEWSLETTERS

WFC3 STAN Issue 33, October 2020

Contents: Updated WFC3 Flux Calibration

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SEPTEMBER 25, 2020
COS NEWSLETTERS

September 2020 STAN

In this STAN we announce the deliveries of new reference files for the calibration of COS spectra obtained with the FUV blue modes G130M/1055 and G130M/1096 and with the NUV gratings G185M, G225M, and G230L.

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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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JULY 23, 2020
COS NEWSLETTERS

July 2020 STAN

In this STAN we announce a CALSPEC update, including a schedule for the implementation of the resulting flux calibration changes for HST instruments. We also provide advice on verifying coordinates in APT for targets that have proper motions.

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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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JUNE 1, 2020
WFC3 NEWSLETTERS

WFC3 STAN Issue 31, June 2020

Contents: : WFC3 in Action! Visit us (online) at the 236th AAS Meeting Cycle 28 Tips and Advice New Absolute Astrometry in MAST Data Products WFC3/IR Sensitivity Over Time EPER Update WFC3 Quicklook Anomalies Database The Dispersed infrared background in WFC3 G102 and G141 observations HST 30th Anniversary Image Information New Documentation

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APRIL 21, 2020
COS NEWSLETTERS

April 2020 STAN

In this newsletter we announce a new CalCOS release, provide updated dark rates, and announce the availability of line spread functions and cross-dispersion spread functions for cenwaves introduced in Cycle 26.

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FEBRUARY 18, 2020
COS NEWSLETTERS

February 2020 STAN

In this newsletter we provide updates about COS to those who are preparing Phase I proposals for HST Cycle 28.

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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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JANUARY 28, 2020
COS NEWSLETTERS

January 2020 STAN

In this STAN we provide an update on new reference file deliveries.

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JANUARY 2, 2020
WFC3 NEWSLETTERS

WFC3 STAN Issue 30, January 2020

Contents: WFC3 in Action! Visit us at the 235th AAS Meeting WFC3 Instrument Handbook for Cycle 28 New Astrometric Solutions in WFC3 Images WFC3 IR PSF Database Available on MAST Portal Comparison of WFC3/UVIS Geometric Distortions Solutions to Gaia Data Release 2 Vacancy Announcement New Documentation

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OCTOBER 28, 2019
COS NEWSLETTERS

October 2019 STAN

In this STAN we provide information on the NUV time-dependent sensitivity.

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