In November 2019, University of Chicago received a National Science Foundation Early-Concept Grant for Exploratory Research (EAGER) grant (AST-2101781) to research, analyze and develop methods and procedures that utilize low-barrier/financially accessible equipment to digitize glass plates for scientific and historical use, investigate and develop a simplified approach to transcribing complex data from logbooks, and to determine how to make data from plates and logbooks accessible and usable by researchers and historians worldwide.
The goal of this grant is to facilitate time-domain astronomy by establishing a set of scalable and cost-effective practices to promote the digitization of data held in astronomical glass plate collections around the world. These efforts will unlock hundreds of years worth of irreplaceable, unreproducible astronomical observations and make them broadly available to researchers across disciplines.
Published in Publications of the Astronomical Society of the Pacific (2022), this paper details improvements on methods to produce scientifically useful scans of astronomical photographic plates using cost-effective tools and equipment. Specifically, the authors examine the effects of the scanning method on magnitude measurements, discuss difficulties encountered when measuring the magnitudes of stars in crowded fields, and present a case study of red supergiant stars. This work produced a catalog of 66,000 measurements of stellar positions and magnitudes in the central 6.8°× 6.8° field of view. This catalog can be accessed at Knowledge@UChicago.
Plate Ry 60, taken by George Ritchey on August 19, 1903
Published in Publications of the Astronomical Society of the Pacific (2021), this paper demonstrates the feasibility of determining the magnitude of stars on archival photographic plates using a commercially available scanner. This low cost approach expands the scientific potential to study variable stars in the archives of observatory plate collections. Using their developed method on this plate (Ry60), students may have identified a heretofore unknown supernova in the spiral galaxy NGC 7331.
Support for this project comes from the National Science Foundation (Grant AST-2101781), University of Chicago College Innovation Fund, John Crerar Foundation, Kathleen and Howard Zar Science Library Fund, Institute on the Formation of Knowledge, and Yerkes Future Foundation.