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AKARI INFRARED CAMERA SURVEY OF THE LARGE MAGELLANIC CLOUD. I. POINT-SOURCE CATALOG

机译:大麦哲伦云的AKARI红外热像仪调查。一,点源目录

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We present a near- to mid-infrared point-source catalog of five photometric bands at 3.2, 7, 11, 15, and 24 μm for a 10?deg2 area of the Large Magellanic Cloud (LMC) obtained with the Infrared Camera on board the AKARI satellite. To cover the survey area the observations were carried out at three separate seasons from 2006 May to June, 2006 October to December, and 2007 March to July. The 10σ limiting magnitudes of the present survey are 17.9, 13.8, 12.4, 9.9, and 8.6?mag at 3.2, 7, 11, 15, and 24 μm, respectively. The photometric accuracy is estimated to be about 0.1?mag at 3.2 μm and 0.06-0.07?mag in the other bands. The position accuracy is 03 at 3.2, 7, and 11 μm and 10 at 15 and 24 μm. The sensitivities at 3.2, 7, and 24?μm are roughly comparable to those of the Spitzer SAGE LMC point-source catalog, while the AKARI catalog provides the data at 11 and 15?μm, covering the mid-infrared spectral range contiguously. Two types of catalog are provided: a Catalog and an Archive. The Archive contains all the detected sources, while the Catalog only includes the sources that have a counterpart in the Spitzer SAGE point-source catalog. The Archive contains about 650,000, 140,000, 97,000, 43,000, and 52,000 sources at 3.2, 7, 11, 15, and 24?μm, respectively. Based on the catalog, we discuss the luminosity functions at each band, the color-color diagram, and the color-magnitude diagram using the 3.2, 7, and 11?μm band data. Stars without circumstellar envelopes, dusty C-rich and O-rich stars, young stellar objects, and background galaxies are located at distinct regions in the diagrams, suggesting that the present catalog is useful for the classification of objects toward the LMC.
机译:我们提供了通过机载红外相机获得的大麦哲伦星云(LMC)的10?deg2区域的五个光度波段的近中红外点源目录,分别位于3.2、7、11、15和24μm。 AKARI卫星。为了覆盖调查区域,从2006年5月至6月,2006年10月至12月以及2007年3月至7月的三个季节进行了观测。本调查的10σ极限强度分别为3.2、7、11、15和24μm,分别为17.9、13.8、12.4、9.9和8.6?mag。测得的光度精度在3.2μm时约为0.1?mag,在其他波段中约为0.06-0.07?mag。位置精度在3.2、7和11μm时为03,在15和24μm时为10。在3.2、7和24?μm处的灵敏度与Spitzer SAGE LMC点源目录的灵敏度大致可比,而AKARI目录则在11和15μm的范围内提供数据,连续覆盖中红外光谱范围。提供两种类型的目录:目录和存档。存档包含所有检测到的源,而目录仅包括在Spitzer SAGE点源目录中具有对应源的源。该档案库分别包含3.2、7、11、15和24?μm的大约650,000、140,000、97,000、43,000和52,000个源。根据目录,我们使用3.2、7和11μm波段数据讨论每个波段的发光度函数,彩色图表和彩色幅度图表。图中的不同区域没有星际包络的恒星,多尘的富含C和O的恒星,年轻的恒星物体以及背景星系,这表明本目录对于对LMC的物体分类很有用。
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