Revised Coordinates and Proper Motions of the Stars in the Luyten Half-Second Catalog
Revised Coordinates and Proper Motions of the Stars in the Luyten Half-Second Catalog
复制标题
鲁顿半秒星表中恒星的修正坐标和固有运动
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
P. Németh
中科院分区：
文献类型：
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作者：
G. Bakos;K. Sahu;P. Németh
我们提出了在Luyten半秒（LHS）目录中的高自行（HPM）恒星的精确坐标和自行数据。原始Luyten星表中的位置不确定性通常大于10″，通常大于30″。我们已经使用了数字扫描的POSS I和POSS II板，以获得更准确的位置和自行的对象。在LHS目录中的4470个候选对象中，有4323个对象在POSS I和POSS II扫描中被手动重新识别。一小部分恒星没有被发现，因为缺乏发现者图表和数字化的POSS II扫描。修正位置的不确定性通常为102 ″，但在少数情况下可能高达108 ″，这比原始数据有很大的改进。与Tycho-2和依巴谷星表的互相关产生了819个候选者（mR为12）。对于这些较亮的源，位置和自行数据被更准确的Tycho-2/Hipparcos数据所取代。我们总共修正了4040颗恒星的自行测量和坐标，修正了4330颗恒星的坐标。该论文的电子版包含LHS目录中所有4470颗恒星的最新信息。
We present refined coordinates and proper-motion data for the high proper-motion (HPM) stars in the Luyten Half-Second (LHS) catalog. The positional uncertainty in the original Luyten catalog is typically greater than 10″ and is often greater than 30″. We have used the digital scans of the POSS I and POSS II plates to derive more accurate positions and proper motions of the objects. Out of the 4470 candidates in the LHS catalog, 4323 objects were manually reidentified in the POSS I and POSS II scans. A small fraction of the stars were not found because of the lack of finder charts and digitized POSS II scans. The uncertainties in the revised positions are typically ∼2″ but can be as high as ∼8″ in a few cases, which is a large improvement over the original data. Cross-correlation with the Tycho-2 and Hipparcos catalogs yielded 819 candidates (with mR ≲ 12). For these brighter sources, the position and proper-motion data were replaced with the more accurate Tycho-2/Hipparcos data. In total, we have revised proper-motion measurements and coordinates for 4040 stars and revised coordinates for 4330 stars. The electronic version of the paper contains the updated information on all 4470 stars in the LHS catalog.