Show simple item record

dc.contributor.authorNaylor, T
dc.contributor.authorBroos, PS
dc.contributor.authorFeigelson, ED
dc.date.accessioned2016-06-14T13:03:21Z
dc.date.issued2013-11-14
dc.description.abstractIdentifying the infrared counterparts of X-ray sources in Galactic plane fields such as those of the MYStIX project presents particular difficulties due to the high density of infrared sources. This high stellar density makes it inevitable that a large fraction of X-ray positions will have a faint field star close to them, which standard matching techniques may incorrectly take to be the counterpart. Instead we use the infrared data to create a model of both the field star and counterpart magnitude distributions, which we then combine with a Bayesian technique to yield a probability that any star is the counterpart of an X-ray source. In our more crowded fields, between 10% and 20% of counterparts that would be identified on the grounds of being the closest star to an X-ray position within a 99% confidence error circle are instead identified by the Bayesian technique as field stars. These stars are preferentially concentrated at faint magnitudes. Equally importantly the technique also gives a probability that the true counterpart to the X-ray source falls beneath the magnitude limit of the infrared catalog. In deriving our method, we place it in the context of other procedures for matching astronomical catalogs. © 2013. The American Astronomical Society. All rights reserved.en_GB
dc.description.sponsorshipThe MYStIX project is supported at Penn State by NASA grant NNX09AC74G, NSF grant AST-0908038, and the Chandra ACIS Team contract SV4-74018 (G. Garmire & L. Townsley, Principal Investigators), issued by the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of NASA under contract NAS8-03060. This research made use of data products from the Chandra Data Archive and the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory (California Institute of Technology) under a contract with NASA.en_GB
dc.identifier.citationAstrophysical Journal, Supplement Series, 2013, Vol. 209, Number 2en_GB
dc.identifier.doi10.1088/0067-0049/209/2/30
dc.identifier.urihttp://hdl.handle.net/10871/22092
dc.language.isoenen_GB
dc.publisherAmerican Astronomical Societyen_GB
dc.rightsThis is the final version of the article. Available from the American Astronomical Society via the DOI in this record.en_GB
dc.titleBayesian matching for X-ray and infrared sources in the MYStIX projecten_GB
dc.typeArticleen_GB
dc.date.available2016-06-14T13:03:21Z
dc.identifier.issn0067-0049
dc.identifier.journalAstrophysical Journal, Supplement Seriesen_GB


Files in this item

This item appears in the following Collection(s)

Show simple item record