2003/10/09 by Spyros Basilakos, S. Basilakos, M. Plionis +12
Chemistry · Computer Science · Physics and Astronomy · #Astrophysics (astro-ph) #Blind Source Separation Techniques #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Spectroscopy and Chemometric Analyses #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0310249
4 pages, 1 figure, to appear in Proceeding of the ''Multi-wavelength Cosmology'', Conference held in Mykonos, Greece, June 2003
arxiv created 2003/10/09 · openalex publication_date 2003/10/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this work we present combined optical and X-ray cluster detection methods in an area near the North Galactic Pole area, previously covered by the SDSS and 2dF optical surveys. The same area has been covered by shallow (∼ 1.8 deg2) XMM-\em Newton observations. The optical cluster detection procedure is based on merging two independent selection methods - a smoothing+percolation technique, and a Matched Filter Algorithm. The X-ray cluster detection is based on a wavelet-based algorithm, incorporated in the SAS v.5.2 package. The final optical sample counts 9 candidate clusters with richness of more than 20 galaxies, corresponding roughly to APM richness class. Three, of our optically detected clusters are also detected in our X-ray survey.