The DASCH Data Processing Pipeline and Multiple Exposure Plate Processing

Details The DASCH Data Processing Pipeline and Multiple Exposure Plate Processing The DASCH Data Processing Pipeline and Multiple Exposure Plate Processing

2011-02-23

arxiv.org/abs/1102.4871v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

4 pages, 1 figure, to appear in the proceedings of the ADASS XX conference, Nov. 7-11 2010, Boston

Scientific paper

Digital Access to a Sky Century @ Harvard (DASCH) is a project to digitize the collection of approximately 525,000 astronomical plates held at the Harvard College Observatory. This paper presents an overview of the DASCH data processing pipeline, with special emphasis on the processing of multiple-exposure plates. Such plates extended the dynamic range of photograph emulsions and improved photometric accuracy by minimizing variations in plate development procedures. Two approaches are explored in this paper: The repetitive use of astrometry.net (Lang et al. 2010) and local correlation searches. Both procedures have yielded additional quality control checks useful to the pipeline.

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