J. Ellen Blue

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The hearing thresholds of two adult manatees were measured using a forced-choice two alternative paradigm and an up/down staircase psychometric method. This is the first behavioral audiogram measured for any Sirenian, as well as the first underwater infrasonic psychometric test with a marine mammal. Auditory thresholds were obtained from 0.4 to 46 kHz, and(More)
We assess the effectiveness of applying information theory to the characterization and quantification of the affects of anthropogenic vessel noise on humpback whale (Megaptera novaeangliae) vocal behavior in and around Glacier Bay, Alaska. Vessel noise has the potential to interfere with the complex vocal behavior of these humpback whales which could have(More)
The presence of a third body orbiting an eclipsing binary system has long been known to ooset the system about a binary/third-body barycenter causing periodic variations in the time of eclipses (due to the increasing or decreasing light travel time). Recent increased precision in the timing of eclipse minima should allow a survey of the prevalence of(More)
For the eclipsing binary system CM Draconis, eclipse minimum times have been monitored with high precision between 1994 and 1999. Periodic deviations of minimum times from a linear ephemeris may indicate the presence of an orbiting third body. Individual measurements of 41 eclipse minimum times result in a standard deviation from linear ephemeris of 5.74(More)
A lightcurve of the eclipsing binary CM Draconis has been analyzed for the presence of transits of planets of size ≥ 2.5 Earth-radii (R e), with periods of 60 days or less, and in co-planar orbits around the binary system. About 400 million model lightcurves, representing transits from planets with periods ranging from 7 to 60 days, have been(More)
For the eclipsing binary system CM Draconis, eclipse minimum times have been monitored with high precision between 1994 and 1999. Periodic deviations of minimum times from a linear ephemeris may indicate the presence of an orbiting third body. Individual measurements of 41 eclipse minimum times result in a standard deviation from linear ephemeris of 5.74(More)
We review some apsects of the search for extrasolar planets around small-mass short-period eclipsing binaries, including lessons from the extensive search around CM Draconis (over 1,000 hours), and the extention of the search to small eclipsing binaries in the crowded field Baade's Window 3 (BW3) in the Galactic plane. In addition to being of intrinsic(More)
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