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Archive | 2006

Second Generation IR Detectors for the Wide Field Camera 3

Massimo Robberto; Sylvia M. Baggett; Rebecca Blackmon; Thomas M. Brown; Howard A. Bushouse; Gregory Delo; Donald F. Figer; Roger Foltz; George Hartig; Bryan Hilbert; Robert J. Hill; Scott D. Johnson; Randy A. Kimble; John W. Mackenty; Eliot M. Malumuth; Elizabeth J. Polidan; Sam Reed; Anne Marie Russell; Augustyn Waczynski; Yiting Wen

High-energy particles that induce a glow on the ZnCdTe substrate of the HgCdTe detectors of WFC3 may increase the background noise and reduce the scientific performance of the instrument. To eliminate this problem, a second generation of infrared detectors with substrate removed is under construction. Early tests indicate that the glow problem is eliminated and the quantum efficiency increases dramatically at shorter wavelengths, potentially providing a substantial improvement in the limiting sensitivity of the instrument.


Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave | 2018

Making good use of JWST's coronagraphs: tools and strategies from a user's perspective

Joseph D. Long; Brian York; J. H. Girard; Laurent Pueyo; William P. Blair; Brian Brooks; Keira Brooks; Robert A. Brown; Howard A. Bushouse; Alicia Canipe; Christine Chen; Kyle Van Gorkom; Brendan Hagan; B. N. Hilbert; Dean C. Hines; Jarron M. Leisenring; Marshall D. Perrin; Klaus Pontoppidan; Abhijith Rajan; Adric Riedel; John Arthur Stansberry; Rémi Soummer; Christopher C. Stark; Matteo Correnti; Bryony Nickson

The James Webb Space Telescope (JWST) and its suite of instruments, modes and high contrast capabilities will enable imaging and characterization of faint and dusty astrophysical sources1-3 (exoplanets, proto-planetary and debris disks, dust shells, etc.) in the vicinity of hosts (stars of all sorts, active galactic nuclei, etc.) with an unprecedented combination of sensitivity and angular resolution at wavelengths beyond 2 μm. Two of its four instruments, NIRCam4, 5 and MIRI,6 feature coronagraphs7, 8 for wavelengths from 2 to 23 μm. JWST will stretch the current parameter space (contrast at a given separation) towards the infrared with respect to the Hubble Space Telescope (HST) and in sensitivity with respect to what is currently achievable from the ground with the best adaptive optics (AO) facilities. The Coronagraphs Working Group at the Space Telescope Science Institute (STScI) along with the Instruments Teams and internal/external partners coordinates efforts to provide the community with the best possible preparation tools, documentation, pipelines, etc. Here we give an update on user support and operational aspects related to coronagraphy. We aim at demonstrating an end to end observing strategy and data management chain for a few science use cases involving coronagraphs. This includes the choice of instrument modes as well as the observing and point-spread function (PSF) subtraction strategies (e.g. visibility, reference stars selection tools, small grid dithers), the design of the proposal with the Exposure Time Calculator (ETC), and the Astronomers Proposal Tool (APT), the generation of realistic simulated data at small working angles and the generation of high level, science-grade data products enabling calibration and state of the art data-processing.


Archive | 2004

WFC3 Science Calibration Plan : Part 4: Test Procedures

Neill Reid; Frank Bartko; Sylvia M. Baggett; Timothy X. Brown; Howard A. Bushouse; George F. Hartig; B. N. Hilbert; Olivia L. Lupie; Massimo Robberto; Massimo Stiavelli


Archive | 2009

WFC3 SMOV Proposal 11445 - IR Geometric Distortion Calibration

Vera Kozhurina-Platais; Colin R. Cox; Brian McLean; Larry D. Petro; Linda Lou Dressel; Howard A. Bushouse


Archive | 2009

WFC3 Calibration Using Galactic Clusters

Elena Sabbi; Jason S. Kalirai; Andre R. Martel; Susana Elizabeth Deustua; Tiffany M. Borders; Howard A. Bushouse; B. N. Hilbert; J. Kim Quijano; Vera Kozhurina-Platais; John W. MacKenty; Peter Rankin McCullough; Cheryl M. Pavlovsky; Larry Petro; Abhijith Rajan; Adam G. Riess


Archive | 1999

The STScI NICMOS Pipeline: CALNICA Single Image Reduction

Howard A. Bushouse; Christopher J. Skinner; John W. MacKenty


Archive | 2011

WFC3/IR Banding

Michael J. Dulude; Sylvia M. Baggett; Howard A. Bushouse; B. N. Hilbert


Archive | 2011

Master sky images for the WFC3 G102 and G141 grisms

M. W. Kummel; Harald Kuntschner; Jeremy R. Walsh; Howard A. Bushouse


Archive | 2010

WFC3: UVIS and IR Flat Fields

Cheryl M. Pavlovsky; Sylvia M. Baggett; Tiffany M. Borders; Howard A. Bushouse; Tomas Dahlen; Michael J. Dulude; B. N. Hilbert; Jasonjot Singh Kalirai; Vera Kozhurina-Platais; Jennifer Mack; John W. MacKenty; Norbert Pirzkal; Abhijith Rajan; Elena Sabbi; Aline Carneiro Viana


Archive | 2009

WFC3 SMOV Proposal 11444 - UVIS Geometric Distortion Calibration

Vera Kozhurina-Platais; Colin R. Cox; Brian McLean; Larry D. Petro; Linda Lou Dressel; Howard A. Bushouse; Elena Sabbi

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John W. MacKenty

Space Telescope Science Institute

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B. N. Hilbert

Space Telescope Science Institute

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Sylvia M. Baggett

Space Telescope Science Institute

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Vera Kozhurina-Platais

Space Telescope Science Institute

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Larry D. Petro

Johns Hopkins University

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Abhijith Rajan

San Diego State University

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Elena Sabbi

Space Telescope Science Institute

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Andre R. Martel

Space Telescope Science Institute

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Christopher J. Skinner

Space Telescope Science Institute

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Cheryl M. Pavlovsky

Space Telescope Science Institute

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