Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hia....14..635t&link_type=abstract
Highlights of Astronomy, Volume 14 IAU XXVI General Assembly, 14-25 August 2006 Karel A. van der Hucht, ed., p.635
Astronomy and Astrophysics
Astronomy
Scientific paper
The XMM-Newton Survey Science Centre has made a pre-release of the second serendipitous source catalogue, 2XMM. This is the largest X-ray source catalogue ever made, including 150 K objects derived from 2500 XMM-Newton observations since launch and covering a total sky area of approximately 400 sq.deg. The typical flux limit of the survey is 10-1 4 cgs, well matched to the dominant source population of the cosmic X-ray background emission. 2XMM will be a unique database to carry out evolutionary studies of different X-ray source populations. In order to maximise the scientific potential of 2XMM it is crucial to cross correlate with multi-wavelength archives and hence characterise the various source samples in detail. One can then go on to identify rare and unique sources as well as addressing crucial science questions using the large, statistically significant samples identified. These serve as the essential training sets for statistical identifications and VO data mining tools. We describe the work undertaken to make the catalogue fully VO compliant via the LEDAS high energy database and identify strategies to address the technical challenges of cross correlating a large catalogue such as this with other prime archives such as SDSS DR4 and UKIDSS. We will illustrate how 2XMM is being used as a test case within the VO community by the UK AstroGrid project to address the complex requirements of astronomers. This includes the handling of multiple matches to other catalogues and the adoption of a figure of merit to grade quality of matches that is not based on variable radius with error alone but can assign probabilities based on sky density and quality criteria from within each archive.
Law-Green Duncan
Morris Dave
Noddle Keith T.
Tedds Jonathan A.
Walton Nic A.
No associations
LandOfFree
The 2XMM pre-release catalogue: a test case for VO cross correlation of large archives does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The 2XMM pre-release catalogue: a test case for VO cross correlation of large archives, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The 2XMM pre-release catalogue: a test case for VO cross correlation of large archives will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-975067