Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Ulrich G. Briel"'
Autor:
Takaya Ohashi, Monique Arnaud, G. M. Voit, A. K. Romer, Chris A. Collins, D. Pierini, G. W. Pratt, Piero Rosati, Trevor J. Ponman, K. Pedersen, M. J. Geller, K. Sabirli, Luigi Guzzo, Ulrich G. Briel, J. P. Henry, Judith H. Croston, R. F. Temple, Hernan Quintana, A. Finoguenov, Hans Boehringer, Kyoko Matsushita, Pedro T. P. Viana, C. R. Mullis, Alexey Vikhlinin, Richard G. Bower, Y.-Y. Zhang, Joseph J. Mohr, Thomas H. Reiprich, R. Kneissl, William R. Forman, Peter Schuecker, Megan Donahue, Stefano Borgani, Somak Raychaudhury
Publikováno v:
Astronomy & Astrophysics. 469:363-377
The largest uncertainty for cosmological studies using clusters of galaxies is introduced by our limited knowledge of the statistics of galaxy cluster structure, and of the scaling relations between observables and cluster mass. To improve on this si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a20ded663e3c9ccc719da41213cf5d69
https://doi.org/10.1051/0004-6361:20066740
https://doi.org/10.1051/0004-6361:20066740
Autor:
I. M. Gioia, C. R. Mullis, Wolfgang Voges, Ulrich G. Briel, John P. Huchra, J. P. Henry, Hans Boehringer
Publikováno v:
The Astrophysical Journal. 617:192-208
We present a detailed description of the first direct measurement of the spatial correlation function of X-ray selected AGN. This result is based on an X-ray flux-limited sample of 219 AGN discovered in the contiguous 80.7 deg^2 region of the ROSAT N
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb6d9d28fc9cc92969dc8f339f4343af
https://doi.org/10.1086/425248
https://doi.org/10.1086/425248
Publikováno v:
The Astrophysical Journal. 615:181-195
We present a mosaic of XMM-Newton observations of the nearby major-merger cluster A754 that has either a wider field or better spectral or spatial resolution than previous observations. We construct maps of X-ray surface brightness and temperature in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68ad0a1f02a4adad1c5ba1ac17ab36f9
https://doi.org/10.1086/423989
https://doi.org/10.1086/423989
Publikováno v:
The Astrophysical Journal. 611:811-820
Using the mosaic of six XMM-Newton observations, we study the hydrodynamic state of the A3562, a cluster in the center of the Shapley Supercluster. The X-ray image reveals a sharp surface brightness gradient within the core of A3562, a 200 kpc ridge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0885b9255407ececa11de72ce03ce97e
https://doi.org/10.1086/422246
https://doi.org/10.1086/422246
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 515:65-69
A Position Sensitive Proportional Counter (PSPC) was the prime focal plane instrument on board the X-ray astronomy satellite ROSAT, a conventional multiwire counter for X-ray imaging in the energy range from 0.1 to 2.4 keV. The detector gas was a mix
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4bc76f1ecbd59d22f8d4acf1745105d4
https://doi.org/10.1016/j.nima.2003.08.132
https://doi.org/10.1016/j.nima.2003.08.132
Autor:
Heike Soltau, Thomas Stadlbauer, Ulrich G. Briel, Jakob Englhauser, Elmar Pfeffermann, Eckehard Kendziorra, Lothar Strüder, Peter Holl, Robert Hartmann, Gisela Hartner, Konrad Dennerl, Frank Haberl, Norbert Meidinger, Michael Freyberg
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 512:386-400
XMM-Newton—a cornerstone mission of the European Space Agency's Horizon 2000 programme—was launched on December 10, 1999 into orbit. Since March 2000 more than 2000 scientific observations were made. An example will be shown. The X-ray pnCCD came
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15d2d1d7b4e008a621407f6420fa71a3
https://doi.org/10.1016/s0168-9002(03)01917-x
https://doi.org/10.1016/s0168-9002(03)01917-x
Autor:
Wolfgang Voges, Christopher R. Mullis, J. P. Henry, Ulrich G. Briel, John P. Huchra, I. M. Gioia, Hans Böhringer
Publikováno v:
The Astrophysical Journal. 553:L109-L113
We have used the ROSAT All-Sky Survey (RASS) observations at the north ecliptic pole (NEP) to construct a catalog of X-ray-emitting objects that is both deep and contiguous. We give here an overview of this NEP Survey. Our catalog fully exploits the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d60887df54353d99d3ab0f4ae0967226
https://doi.org/10.1086/320672
https://doi.org/10.1086/320672
Autor:
J. P. Henry, John P. Huchra, Ulrich G. Briel, I. M. Gioia, Hans Boehringer, Wolfgang Voges, C. R. Mullis
Publikováno v:
The Astrophysical Journal. 553:L115-L118
We have used the ROSAT All-Sky Survey to detect a known supercluster at z=0.087 in the North Ecliptic Pole region. The X-ray data greatly improve our understanding of this supercluster's characteristics, approximately doubling our knowledge of the st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e73d58ab780f2db3116fd078f547123
https://doi.org/10.1086/320670
https://doi.org/10.1086/320670
Autor:
J. P. Henry, Hans Böhringer, Christopher R. Mullis, Wolfgang Voges, I. M. Gioia, Ulrich G. Briel, John P. Huchra
Publikováno v:
The Astrophysical Journal. 553:L105-L108
The deepest region of the ROSAT All-Sky Survey, at the north ecliptic pole, has been studied to produce a complete and unbiased X-ray-selected sample of clusters of galaxies. This sample is used to investigate the nature of cluster evolution and to e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8077da859e3ec55abdffa846255b8afb
https://doi.org/10.1086/320671
https://doi.org/10.1086/320671
Autor:
J. P. Henry, I. M. Gioia, Hans Böhringer, John P. Huchra, Wolfgang Voges, Christopher R. Mullis, Ulrich G. Briel
Publikováno v:
The Astrophysical Journal. 553:L119-L123
In the ROSAT All-Sky Survey, an 80.7 deg2 region near the north ecliptic pole (NEP) constitutes the deepest contiguous observation of the X-ray sky. Four hundred and forty-five unique sources have been detected above a flux of ~2 × 10-14 ergs s-1 cm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7bb065e692417a9afc8e0e9b3a0f5211
https://doi.org/10.1086/320673
https://doi.org/10.1086/320673