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Title: ChaMP Serendipitous Galaxy Cluster Survey

Abstract

We present a survey of serendipitous extended X-ray sources and optical cluster candidates from the Chandra Multi-wavelength Project (ChaMP). Our main goal is to make an unbiased comparison of X-ray and optical cluster detection methods. In 130 archival Chandra pointings covering 13 square degrees, we use a wavelet decomposition technique to detect 55 extended sources, of which 6 are nearby single galaxies. Our X-ray cluster catalog reaches a typical flux limit of about {approx} 10{sup -14} erg s{sup -1} cm{sup -2}, with a median cluster core radius of 21''. For 56 of the 130 X-ray fields, we use the ChaMP's deep NOAO/4m MOSAIC g', r', and i' imaging to independently detect cluster candidates using a Voronoi tessellation and percolation (VTP) method. Red-sequence filtering decreases the galaxy fore/background contamination and provides photometric redshifts to z {approx} 0.7. From the overlapping 6.1 square degree X-ray/optical imaging, we find 115 optical clusters (of which 11% are in the X-ray catalog) and 28 X-ray clusters (of which 46% are in the optical VTP catalog). The median redshift of the 13 X-ray/optical clusters is 0.41, and their median X-ray luminosity (0.5-2 keV) is L{sub X} = (2.65 {+-} 0.19) x 10{sup 43} ergs s{sup -1}.more » The clusters in our sample that are only detected in our optical data are poorer on average ({approx} 4{sigma}) than the X-ray/optically matched clusters, which may partially explain the difference in the detection fractions.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
878722
Report Number(s):
SLAC-PUB-11798
astro-ph/0603521; TRN: US200611%%454
DOE Contract Number:
AC02-76SF00515
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONTAMINATION; DETECTION; GALAXIES; GALAXY CLUSTERS; LUMINOSITY; X-RAY SOURCES; Astrophysics,ASTRO

Citation Formats

Barkhouse, Wayne A., Green, P.J., Vikhlinin, A., Kim, D.-W., Perley, D., Cameron, R., Silverman, J., Mossman, A., Burenin, R., Jannuzi, B.T., Kim, M., Smith, M.G., Smith, R.C., Tananbaum, H., Wilkes, B.J., and /Harvard-Smithsonian Ctr. Astrophys. /UC, Berkeley, Astron. Dept. /SLAC /Garching, Max Planck Inst., MPE /Moscow, Space Res. Inst. /NOAO, Tucson /Cerro-Tololo InterAmerican Obs.. ChaMP Serendipitous Galaxy Cluster Survey. United States: N. p., 2006. Web. doi:10.2172/878722.
Barkhouse, Wayne A., Green, P.J., Vikhlinin, A., Kim, D.-W., Perley, D., Cameron, R., Silverman, J., Mossman, A., Burenin, R., Jannuzi, B.T., Kim, M., Smith, M.G., Smith, R.C., Tananbaum, H., Wilkes, B.J., & /Harvard-Smithsonian Ctr. Astrophys. /UC, Berkeley, Astron. Dept. /SLAC /Garching, Max Planck Inst., MPE /Moscow, Space Res. Inst. /NOAO, Tucson /Cerro-Tololo InterAmerican Obs.. ChaMP Serendipitous Galaxy Cluster Survey. United States. doi:10.2172/878722.
Barkhouse, Wayne A., Green, P.J., Vikhlinin, A., Kim, D.-W., Perley, D., Cameron, R., Silverman, J., Mossman, A., Burenin, R., Jannuzi, B.T., Kim, M., Smith, M.G., Smith, R.C., Tananbaum, H., Wilkes, B.J., and /Harvard-Smithsonian Ctr. Astrophys. /UC, Berkeley, Astron. Dept. /SLAC /Garching, Max Planck Inst., MPE /Moscow, Space Res. Inst. /NOAO, Tucson /Cerro-Tololo InterAmerican Obs.. Mon . "ChaMP Serendipitous Galaxy Cluster Survey". United States. doi:10.2172/878722. https://www.osti.gov/servlets/purl/878722.
@article{osti_878722,
title = {ChaMP Serendipitous Galaxy Cluster Survey},
author = {Barkhouse, Wayne A. and Green, P.J. and Vikhlinin, A. and Kim, D.-W. and Perley, D. and Cameron, R. and Silverman, J. and Mossman, A. and Burenin, R. and Jannuzi, B.T. and Kim, M. and Smith, M.G. and Smith, R.C. and Tananbaum, H. and Wilkes, B.J. and /Harvard-Smithsonian Ctr. Astrophys. /UC, Berkeley, Astron. Dept. /SLAC /Garching, Max Planck Inst., MPE /Moscow, Space Res. Inst. /NOAO, Tucson /Cerro-Tololo InterAmerican Obs.},
abstractNote = {We present a survey of serendipitous extended X-ray sources and optical cluster candidates from the Chandra Multi-wavelength Project (ChaMP). Our main goal is to make an unbiased comparison of X-ray and optical cluster detection methods. In 130 archival Chandra pointings covering 13 square degrees, we use a wavelet decomposition technique to detect 55 extended sources, of which 6 are nearby single galaxies. Our X-ray cluster catalog reaches a typical flux limit of about {approx} 10{sup -14} erg s{sup -1} cm{sup -2}, with a median cluster core radius of 21''. For 56 of the 130 X-ray fields, we use the ChaMP's deep NOAO/4m MOSAIC g', r', and i' imaging to independently detect cluster candidates using a Voronoi tessellation and percolation (VTP) method. Red-sequence filtering decreases the galaxy fore/background contamination and provides photometric redshifts to z {approx} 0.7. From the overlapping 6.1 square degree X-ray/optical imaging, we find 115 optical clusters (of which 11% are in the X-ray catalog) and 28 X-ray clusters (of which 46% are in the optical VTP catalog). The median redshift of the 13 X-ray/optical clusters is 0.41, and their median X-ray luminosity (0.5-2 keV) is L{sub X} = (2.65 {+-} 0.19) x 10{sup 43} ergs s{sup -1}. The clusters in our sample that are only detected in our optical data are poorer on average ({approx} 4{sigma}) than the X-ray/optically matched clusters, which may partially explain the difference in the detection fractions.},
doi = {10.2172/878722},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Apr 03 00:00:00 EDT 2006},
month = {Mon Apr 03 00:00:00 EDT 2006}
}

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