614 citations
- Johns Hopkins UniversityUS18 papers
- National Radio Astronomy ObservatoryUS18 papers
- Space Telescope Science InstituteUS17 papers
- U.S. National Science FoundationUS14 papers
- European Southern ObservatoryCL13 papers
- Trieste Astronomical ObservatoryIT11 papers
- Center for Astrophysics Harvard & SmithsonianUS9 papers
- Max Planck Institute for Extraterrestrial PhysicsDE9 papers
- Arcetri Astrophysical ObservatoryIT8 papers
- Association of Universities for Research in AstronomyUS7 papers
- California Institute of TechnologyUS7 papers
- Leibniz Institute for Astrophysics PotsdamDE7 papers
4 papers · 2 filters
First Results from the X-ray and Optical Survey of the Chandra Deep Field South
R. Giacconi, P. Rosati, P. Tozzi +8
We present our first results from 130 ks of X-ray observations obtained with the Advanced CCD Imaging Spectrometer on the Chandra X-ray Observatory. We reach a flux of 2 X 10^(-16)…
M87 at 90cm: A Different Picture
F. N. Owen, J. a Eilek, N. E. Kassim
We report new radio imaging of the large scale radio structure of M87 with the VLA at 90 cm. These new images show the complex structure of the radio emission more clearly than pre…
Gravitational Lensing by Nearby Clusters of Galaxies
Eduardo S. Cypriano, Laerte Sodre', Luis E. Campusano +5
We present an estimation of the expected number of arcs and arclets in a sample of nearby (z<0.1) clusters of galaxies, that takes into account the magnitude limit of the objects a…
The contribution of Narrow-Line Seyfert 1 galaxies to the soft X-ray background
G. Hasinger, I. Lehmann, M. Schmidt +5
The ROSAT Ultradeep HRI survey in the Lockman Hole contains a complete sample of 91 X-ray sources with fluxes in the 0.5-2 keV band larger than 1.2 times 10e-15 erg cm-2 s-1, where…