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6 papers · 2 filters
XMM-Newton view of the prototype narrow-line Seyfert 1 galaxy I Zw 1
G. C. Dewangan, R. E. Griffiths
We present results based on an XMM-Newton observation of the prototype narrow-line Seyfert 1 galaxy I Zw 1 performed in June 2002. The 0.6-12 keV spectrum is well described by a st…
Imaging the Sunyaev Zel'dovich Effect using ACBAR on Viper
A. K. Romer, P. L. Gomez, C. M. Cantalupo +13
During 2001 and 2002, observations of several X-ray bright clusters of galaxies were conducted using the ACBAR Bolometer Array on the South Pole Viper telescope. A multi-frequency…
Clusters of Galaxies in the SDSS
Robert C. Nichol
I review here past and present research on clusters and groups of galaxies within the Sloan Digital Sky Survey (SDSS). In particular, I discuss the C4 algorithm which is designed t…
Limits on thermal conduction in galaxy clusters
Mikhail V. Medvedev, Adrian L. Melott, Chris Miller +1
We have calculated lower limits for the global effective thermal conductivity in a sample of 165 Abell clusters. We assumed that cluster X-ray luminosity is compensated by a conduc…
XAssist: A System for the Automation of X-ray Astrophysics Analysis
A. Ptak, R. Griffiths
XAssist is a NASA AISR-funded project for the automation of X-ray astrophysics, with emphasis on galaxies. It is nearing completion of its initially funded effort, and is working w…
First Results From an X-ray, Weak Lensing, and Sunyaev-Zeldovich Effect Survey of Nearby Clusters: Abell 3266
P. L. Gomez, A. K. Romer, J. B. Peterson +8
As part of a combined Sunyaev-Zeldovich Effect (SZE), X-ray and weak lensing survey of low redshift (z<0.1) X-ray clusters, we present SZE images of the z=0.059 X-ray cluster Abell…