Precise Photometric Measurements from a 1903 Photographic Plate Using a Commercial Scanner
Precise Photometric Measurements from a 1903 Photographic Plate Using a Commercial Scanner
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DOI：
10.1088/1538-3873/abec20
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发表时间：
2021-01
影响因子：
3.5
通讯作者：
W. Cerny;A. Chapman;Rowen Glusman;R. Kron;Yingyi Liang;Jason J. Lin;Michael N. Martinez;E. Medi
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文献类型：
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作者：
W. Cerny;A. Chapman;Rowen Glusman;R. Kron;Yingyi Liang;Jason J. Lin;Michael N. Martinez;E. Medi
我们证明了使用商用扫描仪确定星等的可行性。我们描述了一个光度的方法，可以作为其他研究的一个有用的例子。特别是，我们测量和校准恒星的星等从1903年的摄影板从耶基斯天文台收集，并证明，从我们的方法的整体精度优于0.10马格。值得注意的是，这些测量是由固有板噪声为主，而不是通过扫描/数字化过程中引入的噪声。这种方法的低成本扩大了研究天文台底片收藏档案中变星的科学潜力。我们使用偶然发现的候选瞬态在摄影星等PG = 16.60的旋涡星系NGC 7331来说明我们的测光方法。如果这个未知的来源是超新星，它将是NGC 7331中第四颗已知的超新星。
We demonstrate the feasibility of determining magnitudes of stars on archival photographic plates using a commercially available scanner. We describe one photometric approach that could serve as a useful example for other studies. In particular, we measure and calibrate stellar magnitudes from a 1903 photographic plate from the Yerkes Observatory collection, and demonstrate that the overall precision from our methods is better than 0.10 mag. Notably, these measurements are dominated by intrinsic plate noise, rather than noise introduced through the scanning/digitization process. The low expense of this approach expands the scientific potential to study variable stars in the archives of observatory plate collections. We use the serendipitous discovery of a candidate transient at photographic magnitude pg = 16.60 in the spiral galaxy NGC 7331 to illustrate our photometric methods. If this unknown source is a supernova, it would represent the fourth known supernova in NGC 7331.