Chandra Multiwavelength Project X-ray Point Source Catalog

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dc.creatorKim, Minsun
dc.creatorKim, Dong-Woo
dc.creatorWilkes, Belinda J.
dc.creatorGreen, Paul J.
dc.creatorKim, Eunhyeuk
dc.creatorAnderson, Craig S.
dc.creatorBarkhouse, Wayne A.
dc.creatorEvans, Nancy R.
dc.creatorIvezic, Zeljko
dc.creatorKarovska, Margarita
dc.creatorKashyap, Vinay L.
dc.creatorLee, Myung Gyoon
dc.creatorMaksym, Peter
dc.creatorMossman, Amy E.
dc.creatorSilverman, John D.
dc.creatorTananbaum, Harvey D.
dc.date2006-11-28
dc.date.accessioned2026-07-07T11:42:40Z
dc.date.available2026-07-07T11:42:40Z
dc.descriptionWe present the Chandra Multiwavelength Project (ChaMP) X-ray point source catalog with ~6,800 X-ray sources detected in 149 Chandra observations covering \~10 deg^2. The full ChaMP catalog sample is seven times larger than the initial published ChaMP catalog. The exposure time of the fields in our sample ranges from 0.9 to 124 ksec, corresponding to a deepest X-ray flux limit of f_{0.5-8.0} = 9 x 10^{-16} erg/cm2/sec. The ChaMP X-ray data have been uniformly reduced and analyzed with ChaMP-specific pipelines, and then carefully validated by visual inspection. The ChaMP catalog includes X-ray photometric data in 8 different energy bands as well as X-ray spectral hardness ratios and colors. To best utilize the ChaMP catalog, we also present the source reliability, detection probability and positional uncertainty. To quantitatively assess those parameters, we performed extensive simulations. In particular, we present a set of empirical equations: the flux limit as a function of effective exposure time, and the positional uncertainty as a function of source counts and off axis angle. The false source detection rate is ~1% of all detected ChaMP sources, while the detection probability is better than ~95% for sources with counts >30 and off axis angle <5 arcmin. The typical positional offset between ChaMP X-ray source and their SDSS optical counterparts is 0.7+-0.4 arcsec, derived from ~900 matched sources.
dc.description60 pages, 21 figures, accepted for publication in ApJS, Full resolution version is available at http://hea-www.cfa.harvard.edu/CHAMP/RESULTS_PAPERS/ChaMP_xcat.pdf
dc.identifierhttps://arxiv.org/abs/astro-ph/0611840
dc.identifierhttp://arxiv.org/abs/astro-ph/0611840
dc.identifierAstrophys.J.Suppl.169:401-429,2007
dc.identifierdoi:10.1086/511634
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200965
dc.subjectAstrophysics
dc.titleChandra Multiwavelength Project X-ray Point Source Catalog
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