Kazuo Hiroi, Yoshihiro Ueda, Masaaki Hayashida, Megumi Shidatsu, Ryosuke Sato, Taiki Kawamuro, Mutsumi Sugizaki, Satoshi Nakahira, Motoko Serino, Nobuyuki Kawai, Masaru Matsuoka, Tatehiro Mihara, Mikio Morii, Motoki Nakajima, Hitoshi Negoro, Takanori Sakamoto, Hiroshi Tomida, Yohko Tsuboi, Hiroshi Tsunemi, Shiro Ueno, Kazutaka Yamaoka, Atsumasa Yoshida, Masato Asada, Satoshi Eguchi, Takanori Hanayama, Masaya Higa, Kazuto Ishikawa, Masaki Ishikawa, Naoki Isobe, Mitsuhiro Kohama, Masashi Kimura, Kumiko Morihana, Yujin E. Nakagawa, Yuki Nakano, Yasunori Nishimura, Yuji Ogawa, Masayuki Sasaki, Juri Sugimoto, Toshihiro Takagi, Ryuichi Usui, Takayuki Yamamoto, Makoto Yamauchi, Koshiro Yoshidome
We present the catalog of high Galactic-latitude ($|b|>10^{\circ}$) X-ray sources detected in the first 37-month data of Monitor of All-sky X-ray Image (MAXI) / Gas Slit Camera (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 fit with the Poisson likelihood algorithm. The catalog contains 500 objects detected in the 4--10 keV band with significance of $s_{\rm D, 4-10 keV} \geq 7$. The limiting sensitivity is $\approx 7.5\times10^{-12}$ ergs cm$^{-2}$ s$^{-1}$ ($\approx 0.6$ mCrab) in the 4--10 keV band for 50% of the survey area, which is the highest ever achieved as 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, the meta-catalog of X-ray detected clusters of galaxies, and the MAXI/GSC 7-month catalog. Our catalog lists the source name (2MAXI), position and its error, detection significances and fluxes in the 4--10 keV and 3--4 keV bands, their hardness ratio, and basic information of the likely counterpart available for 296 sources.
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http://arxiv.org/abs/1307.2455
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