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Description
We present a catalog of high Galactic-latitude (|b|>10{deg}) X-ray sources detected in the first 37 months of data of the Monitor of All-sky X-ray Image/Gas Slit Camera (MAXI/GSC). To achieve the best sensitivity, we develop a background model of the GSC that well reproduces the data based on the detailed on-board calibration. Source detection is performed through image fits with a Poisson likelihood algorithm. The catalog contains 500 objects detected with significances of s_D,4-10keV_>=7 in the 4-10keV band. The limiting sensitivity is ~7.5x10^-12^erg/cm2/s (~0.6mCrab) in the 4-10keV band for 50% of the survey area, which is the highest ever achieved in an all-sky survey mission covering this energy band. We summarize the statistical properties of the catalog and results from cross matching with the Swift/BAT 70 month catalog (Cat. J/ApJS/207/19), the meta-catalog of X-ray detected clusters of galaxies (MCXC; Cat. J/A+A/534/A109), and the MAXI/GSC 7 month catalog (Cat. J/PASJ/63/S677). Our catalog lists the source name (2MAXI), position and its error, detection significances and fluxes in the 4-10keV and 3-4keV bands, the hardness ratio, and the basic information of the likely counterpart available for 296 sources.
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