论文标题
cfht megaprime/megacam $ u $ $ band源目录
CFHT MegaPrime/MegaCam $u$-band source catalogue of the $AKARI$ North Ecliptic Pole Wide field
论文作者
论文摘要
$ AKARI $红外线（IR）太空望远镜在北黄道杆（NEP）田地进行了两次调查（深宽），使用其红外摄像头（IRC）查找了超过100,000个IR源。 IRC的9滤波器连续覆盖2至24 $μ$ m的波段，与其他IR观测值（例如$ Spitzer $或$ Wise $）相比，$ AKARI $独特。但是，由于缺乏紫外线（UV）和光学观察结果，对$ akari $ nep宽的现场来源的研究受到限制。在这项工作中，我们介绍了加拿大 - 弗朗西·霍瓦伊望远镜（CFHT）MEGAPRIME/MEGACAM $ U $ u $ -band Source Catalog of $ akari $ nep wide Field。观察结果是在2015年和2016年的7晚中进行的，导致观察到的框架覆盖3.6度$^2 $。使用\ textsc {elixir}管道和\ textsc {Astromation}软件在标准过程中进行了数据降低，图像处理和源提取，最终提取了351,635个来源。由于总体整合时间的差异（4,520和13,910秒），在两个区域（浅层和深）中分别讨论了数据质量。 5 $σ$限制幅度，看到FWHM和50％完整性的幅度为25.38 mag（深区25.79 mag），0.82 ARCSEC（0.94 ARCSEC）和25.06 MAG（25.45 MAG）。 U波段数据为我们提供了对$ Akari $太空望远镜的珍贵红外资源的光度红移和紫外线估算的重要改进。
The $AKARI$ infrared (IR) space telescope conducted two surveys (Deep and Wide) in the North Ecliptic Pole (NEP) field to find more than 100,000 IR sources using its Infrared Camera (IRC). IRC's 9 filters, which cover wavebands from 2 to 24 $μ$m continuously, make $AKARI$ unique in comparison with other IR observatories such as $Spitzer$ or $WISE$. However, studies of the $AKARI$ NEP-Wide field sources had been limited due to the lack of follow-up observations in the ultraviolet (UV) and optical. In this work, we present the Canada-France-Hawaii Telescope (CFHT) MegaPrime/MegaCam $u$-band source catalogue of the $AKARI$ NEP-Wide field. The observations were taken in 7 nights in 2015 and 2016, resulting in 82 observed frames covering 3.6 deg$^2$. The data reduction, image processing and source extraction were performed in a standard procedure using the \textsc{Elixir} pipeline and the \textsc{AstrOmatic} software, and eventually 351,635 sources have been extracted. The data quality is discussed in two regions (shallow and deep) separately, due to the difference in the total integration time (4,520 and 13,910 seconds). The 5$σ$ limiting magnitude, seeing FWHM, and the magnitude at 50 per cent completeness are 25.38 mag (25.79 mag in the deep region), 0.82 arcsec (0.94 arcsec) and 25.06 mag (25.45 mag), respectively. The u-band data provide us with critical improvements to photometric redshifts and UV estimates of the precious infrared sources from the $AKARI$ space telescope.
