VizieR Online Data Catalog: A search for variable stars in M4 with K2 LCs (Wallace+, 2019)
Abstract
The images used are the 16 target pixel files (TPFs) that make up the M4 superstamp from the Mikulski Archive for Space Telescopes; taken by the Kepler space telescope during the K2 portion of its mission, specifically during Campaign 2 of that mission, which occurred in 2014. Each is 50 pixels by 50 pixels in dimension. These files had the K2 EPIC ID numbers 200004370-200004385. See section 2 for explanations on the methods to extract and analyze data from the images.
We extracted light curves for 4554 objects in the globular cluster M4 from the K2 superstamp data of the cluster which represent ~78 days of continuous observations in the final light curves. Our final photometric precision is 0.2mmag for G~12, 1mmag for G~15, and 10mmag for G~18 objects, with M4's main-sequence turnoff being around G~16-17.
(6 data files).
- Publication:
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VizieR Online Data Catalog
- Pub Date:
- February 2020
- DOI:
- Bibcode:
- 2020yCat..22440012W
- Keywords:
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- Clusters: globular;
- Stars: variable;
- Photometry: G band