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The James Webb Space Telescope (JWST) is a large (6.6 m), cold (<50 K), infrared (IR)-optimized space observatory that will be launched early in the next decade into orbit around the second Earth–Sun Lagrange point. The observatory will have four instruments: a near-IR camera, a near-IR multiobject spectrograph, and a tunable filter imager will cover the(More)
Relative to ground-based telescopes, the James Webb Space Telescope (JWST) will have a substantial sensitivity advantage in the 2.2-5 µm wavelength range where brown dwarfs and hot Jupiters are thought to have significant brightness enhancements. To facilitate high contrast imaging within this band, the Near-Infrared Camera (NIRCAM) will employ a Lyot(More)
We present an empirical infrared spectral library of medium resolution (R≈2000-3000) H (1.6 µm) and K (2.2 µm) band spectra of 218 red stars, spanning a range of [Fe/H] from ∼−2.2 to ∼+0.3. The sample includes Galactic disk stars, bulge stars from Baade's window, and red giants from Galactic globular clusters. We report the values of 19 indices covering 12(More)
The expected stable point spread function, wide field of view, and sensitivity of the NIRCam instrument on the James Webb Space Telescope (JWST) will allow a simple, classical Lyot coronagraph to detect warm Jovian-mass companions orbiting young stars within 150 pc as well as cool Jupiters around the nearest low-mass stars. The coronagraph can also be used(More)
We report the first near-infrared (NIR) imaging of a circumstellar annular disk around the young (∼8 Myr), Vega-like star HR 4796A. NICMOS coronagraph observations at 1.1 and 1.6 mm reveal a ringlike symmetrical structure that peaks in reflected intensity (∼70 AU) from the central A0 V star. The ring geometry, 1Љ .05 ‫ע‬ 0Љ .02 with an inclination of and a(More)
The Open University's repository of research publications and other research outputs SDSS-III: massive spectroscopic surveys of the distant universe, the Milky Way, and extra-solar planetary systems Journal Article Eisenstein et al. ABSTRACT Building on the legacy of the Sloan Digital Sky Survey (SDSS-I and II), SDSS-III is a program of four spectroscopic(More)
We have obtained images of the Trapezium Cluster (140@@ ] 140@@ ; 0.3 pc ] 0.3 pc) with the Hubble Space T elescope Near-Infrared Camera and Multi-Object Spectrometer (NICMOS). Combining these data with new ground-based K-band spectra (R \ 800) and existing spectral types and photometry, we have constructed an H-R diagram and used it and other arguments to(More)
We present the discovery of a candidate substellar object in a survey of young stars in the solar vicinity using the sensitivity and spatial resolution afforded by the NICMOS coronagraph on the Hubble Space Telescope. The mag object was discovered approximately 2Љ from the TW Hydrae association member CD Ϫ33Њ7795 H ϭ 12.1 (TWA 5), and the photometry implies(More)
We describe the data reduction algorithms for the Multiband Imaging Photometer for SIRTF (MIPS) instrument. These algorithms are based on extensive preflight testing and modeling of the Si:As (24 µm) and Ge:Ga (70 and 160 µm) arrays in MIPS. The behaviors we describe are typical of state-of-the-art infrared focal planes operated in the low backgrounds of(More)