JHK standard stars for large telescopes: the UKIRT Fundamental and Extended lists
JHK standard stars for large telescopes: the UKIRT Fundamental and Extended lists
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大型望远镜的 JHK 标准恒星：UKIRT 基本列表和扩展列表
DOI：
10.1046/j.1365-8711.2001.04460.x
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发表时间：
2001
影响因子：
4.8
通讯作者：
M. Casali
中科院分区：
文献类型：
--
作者：
T. Hawarden;S. Leggett;M. Letawsky;D. Ballantyne;M. Casali
我们用3.8米的英国红外望远镜（UKIRT）对82颗标准恒星进行了高精度的光度测量，其中28颗来自被广泛使用的“UKIRT微弱标准”初步表，这里称为基本表，另外54颗被称为扩展表。这些恒星的比例分别为9:4、K和15:0，在正常工作模式下，在孔径达10米的望远镜上，用成像阵列探测器应该可以很容易地观察到所有或大部分恒星。很多都可以从南半球到达。给出了arcsec精度位置（J2000, epoch,1998），以及文献中可用的光学光度和光谱类型，或从j2k颜色推断。提供了自运动超过0.3arcsecyr 21的恒星的k波段查找图。讨论了阵列成像仪平场构造中存在的一些缺陷，以及避免这些缺陷的方法。在1994年末至1998年初的30个晚上里，作为整个节目标准的《基本星表》中的星星平均每10个晚上被观察到，而《扩展星表》中的星星平均每6个晚上被观察到。K等平均结果的平均内标准误差为0.005mag；对于j2h色，基本星表的亮度为0.003等，扩展星表的亮度为0.005等；h2k的平均值为0.004 mg。结果是在IRCAM3成像仪的自然系统上得到的，该成像仪使用256 - 256 InSb探测器阵列，带有“标准”JHK滤波器，后面是镀金的前光学元件和金或银介电涂层的二向色。我们对CIT， Arcetri和LCO/Palomar NICMOS系统进行了颜色变换，并对新的莫纳克亚天文台近红外滤光片组定义的系统进行了初步变换。
We present high-precision JHK photometry with the 3.8-m UK Infrared Telescope (UKIRT) of 82 standard stars, 28 from the widely used preliminary list known as the ‘UKIRT Faint Standards’, referred to here as the Fundamental List, and 54 additional stars referred to as the Extended List. The stars have 9:4 , K , 15:0 and all or most should be readily observable with imaging array detectors in normal operating modes on telescopes of up to 10-m aperture. Many are accessible from the southern hemisphere. Arcsec-accuracy positions (J2000, epoch ,1998) are given, together with optical photometry and spectral types from the literature, where available, or inferred from the J 2 K colour. K-band finding charts are provided for stars with proper motions exceeding 0.3arcsecyr 21 . We discuss some pitfalls in the construction of flat-fields for array imagers and a method to avoid them. On 30 nights between late 1994 and early 1998 the stars from the Fundamental List, which were used as standards for thewhole programme, were observed on an average of 10 nights each, and those from the Extended List on an average of six nights. The average internal standard error of the mean results for the K magnitudes is 0.005mag; for the J 2 H colours it is 0.003mag for the Fundamental List stars and 0.005mag for those of the Extended List; for H 2 K the average is 0.004mag. The results are on the natural system of the IRCAM3 imager, which used a 256 � 256 InSb detector array with ‘standard’ JHK filters, behind gold-coated fore-optics and a gold- or silver-dielectric coated dichroic. We give colour transformations on to the CIT, Arcetri and LCO/Palomar NICMOS systems, and preliminary transformations on to the system defined by the new Mauna Kea Observatory near-infrared filter set.