arXiv 1208.08652012-08-03astro-ph.IMastro-ph.CO

PreCam，一个校准暗能量调查的前兆观测活动

PreCam, a Precursor Observational Campaign for Calibration of the Dark Energy Survey

K. Kuehn, S. Kuhlmann, S. Allam, J. T. Annis, T. Bailey, E. Balbinot, J. P. Bernstein, T. Biesiadzinski, D. L. Burke, M. Butner, J. I. B. Camargo, L. A. N. da C… 展开作者

K. Kuehn, S. Kuhlmann, S. Allam, J. T. Annis, T. Bailey, E. Balbinot, J. P. Bernstein, T. Biesiadzinski, D. L. Burke, M. Butner, J. I. B. Camargo, L. A. N. da Costa, D. DePoy, H. T. Diehl, J. P. Dietrich, J. Estrada, A. Fausti, B. Gerke, V. Guarino, H. H. Head, R. Kessler, H. Lin, W. Lorenzon, M. A. G. Maia, L. Maki, J. Marshall, B. Nord, E. Neilsen, R. L. C. Ogando, D. Park, J. Peoples, D. Rastawicki, J. -P. Rheault, B. Santiago, M. Schubnell, P. Seitzer, J. A. Smith, H. Spinka, A. Sypniewski, G. Tarle, D. L. Tucker, A. Walker, W. Wester

备注：: 21 pages, 15 figures, submitted to PASP
DOI：: 10.1086/670592

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摘要：

PreCam是支持暗能量巡天（DES）的先驱观测活动，旨在产生DES足迹内近10万颗标准恒星的测光和天体测量目录，而PreCam仪器也作为暗能量相机（DECam）硬件和软件的原型测试平台。该星表代表了南半球光度标准星可能增加100倍，因此将成为暗能量巡天校准的重要组成部分。我们提供了有关PreCam仪器的设计，建造和测试的详细信息，以及密歇根大学天文学系Cerro Tololo美洲天文台Curtis-Schmidt望远镜的PreCam调查观测的51个夜晚的子集的结果。我们简要地描述了初步的数据处理管道，已开发的PreCam数据和仪器性能的初步结果，以及天体测量和测光的恒星样本以前包括在其他南部天空调查。

英文摘要：

PreCam, a precursor observational campaign supporting the Dark Energy Survey (DES), is designed to produce a photometric and astrometric catalog of nearly a hundred thousand standard stars within the DES footprint, while the PreCam instrument also serves as a prototype testbed for the Dark Energy Camera (DECam)'s hardware and software. This catalog represents a potential 100-fold increase in Southern Hemisphere photometric standard stars, and therefore will be an important component in the calibration of the Dark Energy Survey. We provide details on the PreCam instrument's design, construction and testing, as well as results from a subset of the 51 nights of PreCam survey observations on the University of Michigan Department of Astronomy's Curtis-Schmidt telescope at Cerro Tololo Inter-American Observatory. We briefly describe the preliminary data processing pipeline that has been developed for PreCam data and the preliminary results of the instrument performance, as well as astrometry and photometry of a sample of stars previously included in other southern sky surveys.

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