Search Publications
HUBBLE SPACE TELESCOPE Imaging of the Host Galaxies of High-RedshiftRadio-loud Quasars
Lehnert, Matthew D.; Heckman, Timothy M.; Miley, George K. +1 more
We present rest-frame UV and Lyα images of spatially resolved structures (``hosts'') around five high-redshift radio-loud quasars obtained with the WFPC2 camera on the Hubble Space Telescope (HST). The quasars were imaged with the PC1 through the F555W (``V''-band) filter, which at the redshifts of the quasars (2.1<z<2.6) have central wavele…
TheUlysses Supplement to the BATSE 4BR Catalog of Cosmic Gamma-Ray Bursts
Cline, T.; Hurley, K.; Kouveliotou, C. +5 more
We present Interplanetary Network localization information for 147 gamma-ray bursts observed by the Burst and Transient Source Experiment between the end of the Third BATSE catalog and the end of the Fourth BATSE catalog, obtained by analyzing the arrival times of these bursts at the Ulysses and Compton Gamma-Ray Observatory (CGRO) spacecraft. For…
Final Astro-2 Calibration of the Hopkins Ultraviolet Telescope
Brown, Thomas M.; Kriss, Gerard A.; Davidsen, Arthur F. +3 more
We present the final calibration of the Hopkins Ultraviolet Telescope (HUT) for its flight during the Astro-2 space shuttle mission in 1995 March. Aspects of mission operations and instrument performance that affect data quality are described in detail, as are the data reduction procedures applied to the archived data. The sensitivity calibration …
HUBBLE SPACE TELESCOPE Photometry of the Globular Cluster M4
Bond, Howard E.; Ibata, Rodrigo A.; Stetson, Peter B. +5 more
This paper presents a detailed description of the acquisition and processing of a large body of imaging data for three fields in the globular cluster M4 taken with the Wide Field and Planetary Camera 2 aboard the Hubble Space Telescope. Analysis with the ALLFRAME package yielded the deepest photometry yet obtained for this cluster. The resulting d…
Pictor A (PKS 0518-45): From Nucleus to Lobes
Simkin, S. M.; Tingay, S. J.; Sadler, E. M. +2 more
We present a variety of new imaging and kinematic data for the double-lobed radio galaxy Pictor A. The new optical data include Hubble Space Telescope (HST) continuum and [O III], emission-line images (at a resolution of 25-100 mas) and ground-based imaging and spectroscopy (at a resolution of ~1.5"). The ground-based images show Hα filaments and …
Near-Infrared and Ultraviolet Spectrophotometry of Symbiotic Novae
Erwin, Peter; Rudy, Richard J.; Puetter, R. C. +3 more
In this paper we present an atlas of near-infrared spectrophotometry of symbiotic novae and report results from nearly contemporaneous IUE observations. The data cover RT Ser, AG Peg, V1016 Cyg, V1329 Cyg, HM Sge, and Pu Vul, most of the known symbiotic novae that are observable from the northern hemisphere. Emission-line strengths for both spectr…
Orbits of Five Visual Double Stars
Docobo, J. A.; Ling, J. F.
This paper revises and discusses the orbits and other parameters of the double stars WDS 01497-1414, WDS 05413+1632, WDS 11136+5525, WDS 20311+3333, and WDS 20494+1124.
Clustering Properties of Low-Redshift QSO Absorption Systems Toward the Galactic Poles
York, Donald G.; Blades, J. Chris; Lauroesch, James T. +8 more
NO>1Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.
Compact Nuclei in Galaxies at Moderate Redshift. I. Imaging and Spectroscopy
Green, Richard F.; Griffiths, Richard E.; Ratnatunga, Kavan +1 more
This study explores the space density and properties of active galaxies to z~=0.8. We have investigated the frequency and nature of unresolved nuclei in galaxies at moderate redshift as indicators of nuclear activity such as active galactic nuclei (AGNs) or starbursts. Candidates are selected by fitting imaged galaxies with multicomponent models u…
Erratum: The Ulysses Supplement to the BATSE 3B Catalog of Cosmic Gamma-Ray Bursts
Cline, T.; Hurley, K.; Kouveliotou, C. +5 more
In the paper ``The Ulysses Supplement to the BATSE 3B Catalog of Cosmic Gamma-Ray Bursts'' by K. Hurley, M. S. Briggs, R. M. Kippen, C. Kouveliotou, C. Meegan, G. Fishman, T. Cline, and M. Boer (ApJS, 120, 399 [1999]), the minimum distance between the error circle and the annulus was given incorrectly on page 404. The correct formula isd=θ2