Search Publications
Photometric Redshift of X-Ray Sources in the Chandra Deep Field-South
Wolf, C.; Zheng, W.; Gilli, R. +10 more
Based on the photometry of 10 near-ultraviolet, optical, and near-infrared bands of the Chandra Deep Field-South, we estimate the photometric redshifts for 342 X-ray sources, which constitute ~99% of all the detected X-ray sources in the field. The models of spectral energy distribution are based on galaxies and a combination of power-law continuu…
The Nature of Faint 24 Micron Sources Seen in Spitzer Space Telescope Observations of ELAIS-N1
Elbaz, D.; Reach, W. T.; Chary, R. +7 more
The Spitzer Space Telescope has undertaken the deepest ever observations of the 24 µm sky in the European Large Area ISO Survey (ELAIS-N1) field, with the Multiband Imaging Photometer (MIPS) instrument, as part of GOODS Science Verification observations. We present completeness-corrected extragalactic source counts down to 24 µm flux d…
FUSE and STIS Observations of the Warm-hot Intergalactic Medium toward PG 1259+593
Richter, Philipp; Tripp, Todd M.; Sembach, Kenneth R. +1 more
We use Far Ultraviolet Spectroscopic Explorer (FUSE) and Space Telescope Imaging Spectrograph (STIS) spectra to study intergalactic absorption toward the quasar PG 1259+593 (zem=0.478), with a particular emphasis on the warm-hot intergalactic medium (WHIM). The combined FUSE and STIS spectrum of PG 1259+593 covers the full wavelength ra…
Cold Dust in Early-Type Galaxies. I. Observations
Brighenti, Fabrizio; Mathews, William G.; Bregman, Jesse D. +1 more
We describe far-infrared observations of early-type galaxies selected from the Infrared Space Observatory (ISO) archive. This rather inhomogeneous sample includes 39 giant elliptical galaxies and 14 S0 (or later) galaxies. These galaxies were observed with the array photometer PHOT on-board the ISO satellite using a variety of different observing …
Imaging of the Supernova Remnant Cassiopeia A with the Multiband Imaging Photometer for Spitzer (MIPS)
Egami, E.; Gehrz, R. D.; Krause, O. +20 more
We present new images of the supernova remnant (SNR) Cas A observed in the 24 and 70 µm bands of the Spitzer Space Telescope (Spitzer). The IR emission correlates well with the Si X-ray and optical [S II] emission but poorly with either the synchrotron-dominated radio structure or the continuum X-ray emission. The IR is therefore dominated b…
New Hipparcos-based Parallaxes for 424 Faint Stars
Gould, Andrew; Chanamé, Julio
We present a catalog of 424 common proper-motion companions to Hipparcos stars with good (>3 σ) parallaxes, thereby effectively providing new parallaxes for these companions. Compared with typical stars in the Hipparcos catalog, these stars are substantially dimmer. The catalog includes 20 white dwarfs and an additional 29 stars with MV
The ACS Virgo Cluster Survey. II. Data Reduction Procedures
Jordán, Andrés; Tonry, John L.; Côté, Patrick +7 more
The ACS Virgo Cluster Survey is a large program to carry out multicolor imaging of 100 early-type members of the Virgo Cluster using the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope. Deep F475W and F850LP images (~SDSS g and z) are being used to study the central regions of the program galaxies, their globular cluster systems, a…
The Off-Nuclear Starbursts in NGC 4038/4039 (The Antennae Galaxies)
Surace, J. A.; Fazio, G. G.; Huang, J. -S. +7 more
Imaging of the Antennae galaxies (NGC 4038/4039) with the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope reveals large concentrations of star-forming activity away from both nuclei of the two merging galaxies. These images confirm earlier findings based on Infrared Space Observatory (ISO) data with lower angular resolution. The sh…
The Deuterium-to-Hydrogen Ratio in a Low-Metallicity Cloud Falling onto the Milky Way
Kruk, J. W.; Savage, B. D.; Wakker, B. P. +13 more
Using Far Ultraviolet Spectroscopic Explorer (FUSE) and Hubble Space Telescope observations of the QSO PG 1259+593, we detect D I Lyman series absorption in high-velocity cloud Complex C, a low-metallicity gas cloud falling onto the Milky Way. This is the first detection of atomic deuterium in the local universe in a location other than the nearby…
An Optical Survey of Supernova Remnants in M83
Blair, William P.; Long, Knox S.
Observations of the face-on spiral galaxy M83 (NGC 5236) performed at the Cerro Tololo Inter-American Observatory in Chile have yielded a catalog of optical supernova remnant (SNR) candidates. These observations were performed with the 4 m Blanco telescope and a prime focus CCD imaging system using narrowband interference filters centered on the l…