Studies of a Complete Sample of Abell Clusters at 1400 MHz

1982 ◽  
pp. 87-88
Author(s):  
Richard A. White ◽  
Frazer N. Owen ◽  
Robert J. Hanisch
Keyword(s):  
Complete Sample ◽  
Abell Clusters

scholarly journals The X-Ray Properties of Nearby Abell Clusters from the ROSAT All-Sky-Survey

1999 ◽  
Vol 186 ◽  
pp. 401-402
Author(s):  
Michael J. Ledlow ◽  
Wolfgang Voges ◽  
Frazer N. Owen ◽  
Jack O. Burns
Keyword(s):  
Cross Correlation ◽  
Radio Galaxy ◽  
Complete Sample ◽  
X Ray ◽  
Abell Clusters ◽  
Sky Survey ◽  
Cluster Properties ◽  
Near Future

Using the ROSAT All-Sky-Survey (RASS), we examine the X-ray properties of a statistically complete sample of 294 nearby (z < 0.09) Abell clusters from our VLA 20cm survey (Ledlow & Owen 1995) and 49 Poor Groups (z < 0.03) (Burns et al. 1996). Our analysis includes a catalog of all significant (> 3σ) X-ray peaks, an analysis of the X-ray extents, identification of ICM emission, comparison to optical cluster properties, and a cross-correlation with our radio galaxy catalogue. We will make optical/X-ray overlays of the cluster fields available over the WWW in the near future (see http://astro.nmsu.edu/~mledlow for updates).

Studies of a Complete Sample of Abell Clusters at 1400 MHz

1982 ◽  
pp. 87-88
Author(s):  
Richard A. White ◽  
Frazer N. Owen ◽  
Robert J. Hanisch
Keyword(s):  
Complete Sample ◽  
Abell Clusters

scholarly journals Optical Properties of FRI Radio Galaxies

1996 ◽  
Vol 175 ◽  
pp. 238-239
Author(s):  
Michael J. Ledlow ◽  
Frazer N. Owen
Keyword(s):  
Optical Properties ◽  
Flux Density ◽  
Radio Galaxies ◽  
Cluster Center ◽  
Radio Sources ◽  
Complete Sample ◽  
Abell Clusters ◽  
Ccd Observations ◽  
Twin Jets ◽  
Compact Sources

From the VLA 20cm survey of ≃ 500 Abell clusters reported by (Ledlow and Owen, 1995), we have obtained optical R-Band CCD observations and optical spectra for 265 radio galaxies. The survey is complete for 20cm flux density greater than 10 mJy within 0.3 corrected Abell radii of the cluster center. All Abell clusters with measured z < 0.09 were surveyed. This statistically complete sample was supplemented by ≃ 200 clusters with 0.09 < z < 0.25 including sources with flux density > 200 mJy. Only 6% of the sample consists of FR II radio sources, the remainder are twin-jets, tailed, or compact sources associated with the FR I class.

scholarly journals Radio-Optical Studies of a Complete Sample of Abell Clusters

1982 ◽  
Vol 97 ◽  
pp. 85-86
Author(s):  
B. Y. Mills ◽  
R. W. Hunstead
Keyword(s):  
Optical Spectra ◽  
Complete Sample ◽  
Stellar Objects ◽  
Cluster Membership ◽  
Abell Clusters ◽  
Early Results ◽  
Cluster Area ◽  
Sky Survey ◽  
Optical Identifications ◽  
Low Dispersion

Study of the properties of radio galaxies in clusters is beset with problems of selection and identification. To reduce these problems we have selected a complete sample of Abell clusters and are using optical spectra of identified galaxies to determine their cluster membership. The sample is in a volume of space defined by the limits of coverage and sensitivity of the two Sydney University radiotelescopes and the Anglo-Australian Telescope; it comprises the 42 clusters with δ≤-8° and distance class 4 or closer. Radio maps have been prepared using archive 408 MHz data from the Molonglo Cross. Possible optical identifications have been selected from the Palomar Sky Survey and low-dispersion optical spectra have been taken of these and sometimes other galaxies or stellar objects within the cluster area. When needed, maps of the cluster areas have been produced at 1415 MHz using the Fleurs Synthesis Telescope. Some details of our early results have been published (Mills et al. 1978, 1979) and here a brief summary of the overall statistics is presented. Observations on five clusters remain to be completed but should not greatly affect the present conclusions.

Photometry of the Central Regions in a Complete Sample of High Bautz‐Morgan–Type Abell Clusters. I. Observations and Data Calibration

2000 ◽  
Vol 126 (1) ◽  
pp. 1-17 ◽  
Author(s):  
H. Quintana ◽  
L. Infante ◽  
P. Fouque ◽  
E. R. Carrasco ◽  
H. Cuevas ◽  
...  
Keyword(s):  
Complete Sample ◽  
Abell Clusters ◽  
Central Regions ◽  
Data Calibration

scholarly journals Studies of a Complete Sample of Abell Clusters at 1400 MHz

1982 ◽  
Vol 97 ◽  
pp. 87-88
Author(s):  
Richard A. White ◽  
Frazer N. Owen ◽  
Robert J. Hanisch
Keyword(s):  
Cluster Size ◽  
Beam Size ◽  
Complete Sample ◽  
Abell Clusters ◽  
Flux Limit ◽  
Abell Cluster ◽  
Radio Survey

We present here analyses of a radio survey of Abell clusters at 1400 MHz using the NRA0 91-m telescope. Details will appear in a paper to be submitted to the Astronomical Journal where we present two lists. The first contains sources within 0.5 of an Abell radius (hereafter Ra, 3 Mpc if H=50) of the center of an Abell cluster. The second contains those clusters for which there were no sources within that limit. The flux limit is 100 mJy, the beam size ∼10 1/2 arcmin, and the declination limit −19°30′. For consistency we use Corwin's (1974) m10 − z calibration throughout. The errors in m10 and therefore z and Ra, combined with a beam large compared to galaxy and cluster size (preventing identifications) preclude all but the simplest analyses which we present here.

Projection, Spatial Correlations, and Anisotropies in a Large and Complete Sample of Abell Clusters

1999 ◽  
Vol 523 (2) ◽  
pp. 492-505 ◽  
Author(s):  
Christopher J. Miller ◽  
David J. Batuski ◽  
Kurt A. Slinglend ◽  
John M. Hill
Keyword(s):  
Spatial Correlations ◽  
Complete Sample ◽  
Abell Clusters
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