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variability

This tag is associated with 4 posts

Mind the Gaps

Astronomical data gathered over time has gaps. Even the most reliable space telescopes suffer from occasional pauses in their otherwise constant watchfulness. Why are gaps a problem? Can’t astronomers just analyze the short chunks of data that don’t have gaps? The answer: Fourier transforms.

A Century of Staring at the Sky: Constraints on Star-Planet Interactions from the DASCH project

Caption: H. A. Sawyer loading plates into the Harvard 16” Metcalf Doublet telescope. Picture from http://hea-www.harvard.edu/DASCH/telescopes.php Paper Title: 100-year DASCH Light Curves of Kepler Planet-Candidate Host Stars Authors: S. Tang et al First Author’s Affiliation: Harvard-Smithsonian Center for Astrophysics, Cambridge, MA; Kavli Institute for Theoretical Physics, Santa Barbara, CA; California Institute of Technology, Pasadena, CA […]

A Big Step Backward for Time Domain Astronomy

Astronomers at Harvard are working to digitize over 500,000 historic photographic plates obtained between 1985 and 1993. With about ~8% of the plates scanned they are already offering us a unique glimpse into the variability of the universe on a 100 year time scale.

Sgr A*: A flickering black hole

Witzel et. al examine the statistical properties of the photometric variability of our Galaxy’s central black hole.

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