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- W3101443302 abstract "We demonstrate ground-based submillimagnitude (< 10-3) photometry of widely separated bright stars using snapshot CCD imaging. We routinely achieved this photometric precision by (1) choosing nearby comparison stars of a similar magnitude and spectral type, (2) defocusing the telescope to allow high signal (>107 e-) to be acquired in a single integration, (3) pointing the telescope so that all stellar images fall on the same detector pixels, and (4) using a region of the CCD detector that is free of nonlinear or aberrant pixels. We describe semiautomated observations with the Supernova Integrated Field Spectrograph (SNIFS) on the University of Hawaii 2.2 m telescope on Mauna Kea, with which we achieved photometric precision as good as 5.2 × 10-4 (0.56 mmag) with a 5 minute cadence over a 2 hr interval. In one experiment, we monitored eight stars, each separated by several degrees, and achieved submillimagnitude precision with a cadence (per star) of ∼17 minutes. Our snapshot technique is suitable for automated searches for planetary transits among multiple bright stars." @default.
- W3101443302 created "2020-11-23" @default.
- W3101443302 creator A5009191583 @default.
- W3101443302 creator A5039362833 @default.
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- W3101443302 date "2011-11-01" @default.
- W3101443302 modified "2023-10-15" @default.
- W3101443302 title "Ground-Based Submillimagnitude CCD Photometry of Bright Stars Using Snapshot Observations" @default.
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- W3101443302 doi "https://doi.org/10.1086/662640" @default.
- W3101443302 hasPublicationYear "2011" @default.
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