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SDSS-RASS: Next Generation of Cluster-Finding Algorithms.
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posted on 2023-06-08, 06:15 authored by Robert C Nichol, Chris Miller, Andy J Connolly, Shan-Shong Chong, Chris Genovese, Andrew W Moore, Daniel Reichart, Jeff Schneider, Larry Wasserman, Jim Annis, John Brinkman, Hans Böhringer, Francisco Castander, Tim McKay, Marc Postman, Erin Sheldon, Istvan Szapudi, Kathy RomerKathy Romer, Wolfgang VogesWe outline here the next generation of cluster-finding algorithms. We show how advances in Computer Science and Statistics have helped develop robust, fast algorithms for finding clusters of galaxies in large multi-dimensional astronomical databases like the Sloan Digital Sky Survey (SDSS). Specifically, this paper presents four new advances: (1) A new semi-parametric algorithm - nicknamed "C4" - for jointly finding clusters of galaxies in the SDSS and ROSAT All-Sky Survey databases; (2) The introduction of the False Discovery Rate into Astronomy; (3) The role of kernel shape in optimizing cluster detection; (4) A new determination of the X-ray Cluster Luminosity Function which has bearing on the existence of a "deficit" of high redshift, high luminosity clusters. This research is part of our "Computational AstroStatistics" collaboration (see Nichol et al. 2000) and the algorithms and techniques discussed herein will form part of the "Virtual Observatory" analysis toolkit.
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Publication status
- Published
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Edited by A.J. Banday, S. Zaroubi, and M. Bartelmann. Springer-VerlagExternal DOI
Page range
613-623Presentation Type
- paper
Event name
Mining the Sky: Proceedings of the MPA/ESO/MPE Workshop. ESO ASTROPHYSICS SYMPOSIAEvent location
Held at Garching, GermanyEvent type
conferenceEvent date
July 31 - August 4, 2000ISBN
3-540-42468-7Department affiliated with
- Physics and Astronomy Publications
Notes
Chong, Shan-Shong; Genovese, Chris; Moore, Andrew W.; Reichart, Daniel; Schneider, Jeff; Wasserman, Larry; Annis, Jim; Brinkman, John; Böhringer, Hans; Castander, Francisco; McKay, Tim; Postman, Marc; Sheldon, Erin; Szapudi, Istvan; Voges, WolfgangFull text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06Usage metrics
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