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- European Space Research and Technology CentreNL660 papers
- Centre National de la Recherche ScientifiqueFR540 papers
- European Space Astronomy CentreES533 papers
- National Institute for AstrophysicsIT433 papers
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32 papers · 1 filter
Measurements of Omega and Lambda from 42 High-Redshift Supernovae
S. Perlmutter, G. Aldering, G. Goldhaber +29
We report measurements of the mass density, Omega_M, and cosmological-constant energy density, Omega_Lambda, of the universe based on the analysis of 42 Type Ia supernovae discover…
VLT and HST observations of a candidate high redshift elliptical galaxy in the Hubble Deep Field South
M. Stiavelli, T. Treu, C. M. Carollo +8
The combined use of the ESO Very Large Telescope (VLT) UT1 Science Verification (SV) images and of the Hubble Space Telescope (HST) Hubble Deep Field South observations allows us t…
The origin of the Narrow Line Region of Mrk 3: an overpressured jet cocoon
A. Capetti, D. J. Axon, F. D. Macchetto +2
We have obtained HST FOC long-slit optical spectroscopy of the Narrow Line Region of the Seyfert 2 galaxy Mrk 3. In the region cospatial with the radio-jet the velocity field is hi…
Towards an Understanding of the Globular Cluster Over--abundance around the Central Giant Elliptical NGC 1399
Markus Kissler-Patig, Carl J. Grillmair, Georges Meylan +3
We investigate the kinematics of a combined sample of 74 globular clusters around NGC 1399. Their high velocity dispersion, increasing with radius, supports their association with…
The extraordinary X-ray spectrum of XTE J0421+560
A. Orr, A. N. Parmar, M. Orlandini +5
We report results of two BeppoSAX observations of the transient X-ray source XTE J0421+560 during the outburst that started in March 1998. The source exhibits radio jets and coinci…
The quiescent state broadband X-ray spectrum and variability of Mkn421
M. Guainazzi, G. Vacanti, A. Malizia +3
The BL Lac object Mkn~421 was observed three times by the X-ray observatory BeppoSAX in consecutive days during 1997 April and May. The source was in a quiescent state, with an ave…