DASCH扫描板的天体测量校正
Correcting the Astrometry of DASCH scanned plates
摘要：
我们描述了在DASCH管道中实施的过程，该管道对每个扫描板进行可靠的天体测量校正。我们的第一个盲天体测量拟合解决了指向，规模和方向的板块在天空中使用天体测量。网络代码然后，我们迭代地改进这个解决方案与WCSTools imwcs。最后，我们应用SCAMP的六阶多项式拟合来校正图像的失真。在对140个板的测试中，该过程使我们能够成功校正79%的板。随着对该过程的进一步改进，我们在对所有扫描板进行再处理后（2010年11月约为11，000），成功率达到95%。我们可以提取比以前的管道多2.85倍的物体的光变曲线，低至17等。对于8到17等的天体，得到的中值RMS误差为0.13”。
英文摘要：
We describe the process implemented in the DASCH pipeline which applies a reliable astrometric correction to each scanned plate. Our first blind astrometric fit resolves the pointing, scale and orientation of the plate in the sky using astrometry. net code. Then we iteratively improve this solution with WCSTools imwcs. Finally, we apply a 6th order polynomial fit with SCAMP to correct the image for distortions. During a test on 140 plates, this process has allowed us to successfully correct 79% of the plates. With further refinements of the process we now reach a 95% success rate after reprocessing all our scanned plates (~11 000 in Nov. 2010). We could extract a lightcurve for 2.85 times more objects than with the previous Pipeline, down to magnitude 17. The resulting median RMS error is 0.13" for objects with mag. 8 to 17.
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。
