Search Publications
Hubble Space Telescope Observations of the Nova-like Cataclysmic Variable V348 Puppis
Long, Knox S.; Froning, Cynthia S.; Baptista, Raymundo
We present time series UV and optical (1150-8000 Å) spectrophotometry of the nova-like (NL) cataclysmic variable V348 Pup through and after eclipse. Outside of eclipse the spectrum is characterized by a blue continuum, strong line emission, and a broad dip from 2000 to 3000 Å. The continuum eclipse depth is roughly the same over the entire wavelen…
VLA Radio Positions of Stars: 1978-1995
Johnston, Kenneth; de Vegt, Christian; Gaume, Ralph
VLA astrometric positions of the radio emission from 52 stars are reported, from observations obtained between 1978 and 1995. The positions of these stars have been obtained and reduced in a uniform manner. Based on our measurements, the offset of the optical (Hipparcos) frame from the radio reference frame is in agreement with the Hipparcos extra…
The Hubble Deep Field South Flanking Fields
Ferguson, Henry C.; Lucas, Ray A.; Baum, Stefi A. +22 more
As part of the Hubble Deep Field South program, a set of shorter two-orbit observations were obtained of the area adjacent to the deep fields. The WFPC2 flanking fields cover a contiguous solid angle of 48 arcmin2. Parallel observations with the STIS and NICMOS instruments produce a patchwork of additional fields with optical and near-i…
Near-Infrared Observations of Powerful High-Redshift Radio Galaxies: 4C 40.36 and 4C 39.37
Armus, L.; Egami, E.; Matthews, K. +4 more
We present near-infrared imaging and spectroscopic observations of two Fanaroff-Riley type II high-redshift radio galaxies (HzRGs), 4C 40.36 (z=2.3) and 4C 39.37 (z=3.2), obtained with the Hubble Space Telescope and the Keck and Hale Telescopes. High-resolution images were taken with filters both in and out of strong emission lines, and together w…
Hubble Space Telescope Observations of the Old Nova DI Lacertae
Szkody, Paula; Sion, Edward M.; Starrfield, Sumner +3 more
We have carried out a synthetic spectral analysis of a Hubble Space Telescope Space Telescope Imaging Spectrograph observation of the old nova DI Lacertae (Nova Lacerta 1910). The spectrum, obtained with the E140M disperser, reveals a rising continuum shortward of 1560 Å, a C IV P Cygni profile indicative of wind outflow associated with disk accre…
STIS Spectral Imagery of the OB Stars in NGC 604. I. Description of the Extraction Technique for a Crowded Stellar Field
Bruhweiler, Fred C.; Miskey, Cherie L.
We have developed a data reduction procedure to extract multiple spectra from a single two-dimensional Space Telescope Imaging Spectrograph (STIS) image of a crowded stellar field. This paper provides a description of our new technique, utilizing a STIS ultraviolet spectral image, acquired with the G140L grating and the 52"×2" aperture, sampling a…
Ultraviolet Structure in the Lensed QSO 0957+561
Hutchings, J. B.
Imaging and spectra of the lensed QSO pair 0957+561 are presented and discussed. The data are principally those from the Space Telescope Imaging Spectrograph near-UV MAMA and cover rest wavelengths from 850 to 1350 Å. The QSOs are both extended over about 1", with morphology that matches with a small rotation and includes one feature aligned with …
Hubble Space Telescope NICMOS Multiband Photometry of Proteus and Puck
Dumas, Christophe; Terrile, Richard J.; Smith, Bradford A.
We report 1.1-2.4 µm multiband photometry of the small Uranian satellites Puck and Portia and of the small Neptunian satellite Proteus obtained with the Hubble Space Telescope and its near-infrared camera NICMOS. The surface of Puck (and likely Portia) displays an absorption feature matching the 2.0 µm band of water ice. In the case of…
The Wind of the B[e] Supergiant Henize S22 Viewed through a Reflection Nebula in DEM L106
Oey, M. S.; Nazé, Yaël; Chu, You-Hua +5 more
Narrowband HST WFPC2 images reveal a bow-shock-like halo around the H II region N30B toward the B[e] supergiant Hen S22 located within the larger DEM L106 nebula in the Large Magellanic Cloud. High-dispersion spectra of N30B show a narrow Hα emission component from the ionized gas; the velocity variations indicate a gas flow of -5 to -10 km s…
The Ultraviolet Continuum Emission of FR I and FR II Radio Galaxies and a Proposal for a Unified AGN Model for FR I sources
Baum, Stefi A.; Zirbel, Esther L.
This paper is the second in a series of two on the UV continuum emission (in the range from 1400 to 3700 Å) of radio galaxies that were extracted from the Hubble Space Telescope (HST) Archives. The sample consists of 31 3C and Parkes radio galaxies that have redshifts below 0.2 (the majority have redshifts of ~0.03) and radio powers of ~1025<…