- How to plan observing of eclipsing binaries when ephemerides are out of date - presented by Bob Buchheim, Gary Billings, Eric Dose, Sebastian Otero, Bert Pablo, and Gerry Samolyk. April 15, 2020.
Photometry of Eclipsing Binaries
New EBs identified by Sebastian Otero and his colleagues:
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The following are useful books regarding eclipsing binary stars:
"An observation in a drawer is no observation at all." I've lost the reference to who said that, but it is worth repeating. Your observations must be put in to the public record to be useful.
This is one step that is unique to observing eclipsing binaries. Once you're taken images of the star field through an eclipse, and produced a time series of V-C magnitudes (and C-K to ensure quality), you must now determine the mid-time of the eclipse. If your data is of good quality, and the star is not badly spotted, the time series will be symmetric around the midpoint of the eclipse. Most algorithms for determining the ToM assume this is so. They numerically "fold" the time series around a hypothesized midpoint, and compute how well the ingress and egress legs match. The algorithm
This page will assume you are an amateur astronomer with some experience taking and processing CCD images. The procedures for doing this are described in the AAVSO CCD Observing Manual, except that it is not essential that you be able to perform transformations. Also, see our Bibliography, and Software Resources pages.
Neils Bohr is reputed to have said, "Prediction is very difficult, especially if it's about the future", but we can say a few things based on what is already on the market, and on the drawing boards.
EB: In this website, and in informal conversation, "EB" is short for "eclipsing binary" -- of any kind! Not to be confused with "EB" in the GCVS or VSX, which means an eclipsing binary with a beta Lyrae light-curve morphology, as opposed to eclipsing binaries with EA or EW light curve morphologies. Both of the general variable star books listed in the bibliography (i.e. Percy, or Hoffmeister et al.) explain the differences between the different types of EBs.