402 citations · 523 across the 7 of their papers we have counts for
7 papers
The Steep Spectrum Quasar PG1404+226 with ASCA, HST and ROSAT
Marie-Helene Ulrich, Andrea Comastri, Stefanie Komossa +1
(abridged) We present and discuss our observations of the NL quasar PG1404+226 with ASCA and HST, and a re-analysis of our earlier observations with ROSAT. The soft X-ray spectrum…
Stellar Kinematics of the Double Nucleus of M31
Thomas S. Statler, Ivan R. King, Philippe Crane +1
We report observations of the double nucleus of M31 with the f/48 long-slit spectrograph of the HST Faint Object Camera. We obtain a total exposure of 19,000 sec. over 7 orbits, wi…
An Anomalous UV Extension in NGC6251
P. Crane, J. Vernet
Deep U-band FOC images of the nuclear region of NGC6251 have revealed a region of extended emission which is most probably radiation scattered from a continuum source in the nucleu…
The supermassive black hole of M87 and the kinematics of its associated gaseous disk
F. Macchetto, A. Marconi, D. J. Axon +3
We have obtained long-slit observations of the circumnuclear region of M87 at three different locations, with a spatial sampling of 0.028" using the Faint Object Camera f/48 spectr…
Is there really a super-massive black hole in M87?
A. Marconi, D. J. Axon, F. D. Macchetto +3
We present the first HST long-slit spectrum of a gaseous disk around a candidate super-massive black-hole. The results of this study on the kinematics of the gaseous disk in M87 ar…
Optical structure and polarization of the western hot spot of Pictor A
R. C. Thomson, P. Crane, C. D. Mackay
HST images of the western hot spot of the nearby FRII radio galaxy Pictor A resolve the hot spot into an amorphous region of highly polarized wisps. The high polarization (>~ 50%)…
Towards Understanding the Nuclues of M31
Philippe Crane
A simple model of the nucleus of M31 based on {\it HST} images and ground based spectroscopy is used to investigate the properties of the double nucleus in M31. The model reproduce…