大类星体参考系（LQRF）--ICRS的光学表示
The Large Quasar Reference Frame (LQRF) - an optical representation of the ICRS
摘要：
来自不同调查的类星体的大量和全天空分布，以及它们在大型深天体测量目录中的存在，使得能够按照其定义原则建立ICRS的光学物质化。即：它是运动学非旋转相对于遥远的河外天体的合奏;与平均赤道和动力学春分J2000对齐;并实现了一系列采用的河外源坐标。从LQAC更新的可能完整的类星体列表开始，这些类星体的初始光学位置可以在USNO B1.0和GSC 2.3星表以及SDSS DR 5中找到。初始位置接下来被放置到基于UCAC 2的参考系上，然后与ICRF对齐，其中添加了VLBA校准器列表和VLA校准器列表中最精确的源-当存在可靠的光学对应物时。最后，LQRF轴检查通过球谐函数，考虑定义赤经，赤经和震级条款。LQRF包含100，165个类星体的J2000参考赤道坐标，在天空中很好地表示，从-83.5度到+88.5度，10弧分是相邻元素之间的平均距离。与ICRF的全球对准是1.5 mas，并且个体位置精度由泊松分布表示，其峰值在赤经赤经139 mas和赤经130 mas处。它是由LQAC的红移和测光信息补充。LQRF被设计成一个天体测量框架，但它也是GAIA任务初始类星体列表的基础，并可用作类星体空间分布和光度函数研究的测试平台。
英文摘要：
The large number and all-sky distribution of quasars from different surveys, along with their presence in large, deep astrometric catalogs,enables the building of an optical materialization of the ICRS following its defining principles. Namely: that it is kinematically non-rotating with respect to the ensemble of distant extragalactic objects; aligned with the mean equator and dynamical equinox of J2000; and realized by a list of adopted coordinates of extragalatic sources. Starting from the updated and presumably complete LQAC list of QSOs, the initial optical positions of those quasars are found in the USNO B1.0 and GSC2.3 catalogs, and from the SDSS DR5. The initial positions are next placed onto UCAC2-based reference frames, following by an alignment with the ICRF, to which were added the most precise sources from the VLBA calibrator list and the VLA calibrator list - when reliable optical counterparts exist. Finally, the LQRF axes are inspected through spherical harmonics, contemplating to define right ascension, declination and magnitude terms. The LQRF contains J2000 referred equatorial coordinates for 100,165 quasars, well represented across the sky, from -83.5 to +88.5 degrees in declination, and with 10 arcmin being the average distance between adjacent elements. The global alignment with the ICRF is 1.5 mas, and the individual position accuracies are represented by a Poisson distribution that peaks at 139 mas in right ascension and 130 mas in declination. It is complemented by redshift and photometry information from the LQAC. The LQRF is designed to be an astrometric frame, but it is also the basis for the GAIA mission initial quasars' list, and can be used as a test bench for quasars' space distribution and luminosity function studies.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
