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Chandra Spectroscopy and Mass Estimation of the Lensing Cluster of Galaxies CL0024+17
Naomi Ota, Makoto Hattori, Etienne Pointecouteau +1
We present the X-ray analysis and the mass estimation of the lensing cluster of galaxies CL0024+17 with Chandra. We found that the temperature profile is consistent with being isot…
Radial arc statistics: A new powerful probe of the central density profile of galaxy clusters
Kohji Molikawa, Makoto Hattori
We show that an expected number ratio of radial arcs (gravitationally lensed images whose major axes lie in the radial direction of a cluster-lens potential) to tangential arcs (gr…
Spectroscopic confirmation of a cluster of galaxies at z=1 in the field of the gravitational lens MG2016+112
G. Soucail, J. P. Kneib, A. O. Jaunsen +3
We present new optical data on the cluster AX J2019+1127 identified by the X-ray satellite ASCA at z\sim 1 (Hattori et al. 1997). The data suggest the presence of a high-redshift c…
The giant luminous arc Statistics. II. spherical lens models based on ROSAT HRI data
Kohji Molikawa, Makoto Hattori, Jean-Paul Kneib +1
We present ROSAT HRI X-ray observations of all the galaxy clusters in the Le Fèvre et al. arc survey sample in order to study the spatial distribution of the intra-cluster medium,…
Emission-Line Properties of MG2016+112: A Luminous Type-2 Quasar at High Redshift
T. Yamada, S. Yamazaki, M. Hattori +2
We present new high signal-to-noise ratio spectra of the components B and C of the gravitational lensing system MG2016+112. We show that image C displays strong emission lines of L…
An ASCA-ROSAT Study of the Distant, Lensing Cluster A2390
H. Boehringer, Y. Tanaka, R. F. Mushotzky +2
We present the results of a combined study of ASCA and ROSAT observations of the distant cluster Abell 2390.We determine the surface brightness profile and the gas density distribu…