Abstract
Abstract
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.
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
3 articles.
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1. They were astronomers;Physics Today;2023-11-01
2. Revised orbits of the two nearest Jupiters;Monthly Notices of the Royal Astronomical Society;2023-07-29
3. Digitization, Measurement, and Analysis of a 1905 Barnard Atlas Photographic Plate;Publications of the Astronomical Society of the Pacific;2022-09-01