DASCH：将100多年的摄影数据带入21世纪及未来
DASCH: Bringing 100+ Years of Photographic Data into the 21st Century and Beyond
AI总结：
DASCH项目完成47万次扫描，将哈佛百年玻璃底片数字化，产出200 TB图像与16 TB光变曲线，覆盖全天并跨越百年，数据发布7版集成于数字分析。
摘要：
哈佛大学天文台是20世纪初卓越的天文数据中心：它收集并保存了庞大的玻璃照相底片库，该底片库当时是世界上最大的，至今仍是。近二十年来，DASCH（数字访问一个世纪的天文@哈佛）利用一台独一无二的底片扫描仪对该库进行了数字化。2024年初，在完成470,000次扫描后，DASCH项目结束。如今，这一独特的模拟数据集可以整合到21世纪的数字分析中。DASCH的关键数据产品包括约200 TB的底片图像、约16 TB的校准光变曲线，以及各种辅助元数据和校准输出。几乎天空的每一部分都被数千幅DASCH图像覆盖，时间基线跨越100多年；大多数亮于B~15等的恒星都有数百或数千次探测。DASCH数据发布第7版于2024年末发布，标志着DASCH扫描项目的巅峰。
英文摘要：
The Harvard College Observatory was the preeminent astronomical data center of the early 20th century: it gathered and archived an enormous collection of glass photographic plates that became, and remains, the largest in the world. For nearly twenty years DASCH (Digital Access to a Sky Century @ Harvard) actively digitized this library using a one-of-a kind plate scanner. In early 2024, after 470,000 scans, the DASCH project finished. Now, this unique analog dataset can be integrated into 21st-century, digital analyses. The key DASCH data products include ~200 TB of plate images, ~16 TB of calibrated light curves, and a variety of supporting metadata and calibration outputs. Virtually every part of the sky is covered by thousands of DASCH images with a time baseline spanning more than 100 years; most stars brighter than B ~ 15 have hundreds or thousands of detections. DASCH Data Release 7, issued in late 2024, represents the culmination of the DASCH scanning project.
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。
