WASP-15 was first observed by the South African Astronomical Observatory, which coordinates the planet-searching SuperWASP program in the Southern Hemisphere (WASP-South), and was catalogued by its brightness and its coordinates in the sky. This information was captured first with one camera field between May 4, 2006 and July 17, 2006, and later again using two overlapping camera fields between January 31, 2007 to July 7, 2007 and from January 31, 2008 to May 29, 2008.
Data processing led to the acquisition of 24,943 data points that suggested that some body transited, or crossed in front of (and briefly dimmed), WASP-15 every 3.7520 days. Approximately eleven transits, full and partial, were observed. Use of the EulerCAM photometer at the La Silla Observatory's 1.2 m Leonhard Euler Telescope on March 29, 2008 provided further evidence for an exoplanet by better defining the transit's curve. Later, the CORALIE spectrograph (also on the Euler telescope) between March 6, 2008 and July 17, 2008 used Doppler spectroscopy to collect 21 radial velocity measurements. Analysis confirmed the presence of a planet that was later designated WASP-15b.
Read more about this topic: WASP-15
Other articles related to "observational history, history":
... The longitudinal movement of the ovals seemed to be influenced by two factors Jupiter's position in its orbit (they became faster at aphelion), and their proximity to the GRS (they accelerated when within 50 degrees of the Spot) ... The overall trend of the white oval drift rate was deceleration, with a decrease by half between 1940 and 1990 ...
... Throughout recorded history, several cosmologies and cosmogonies have been proposed to account for observations of the universe ...
Famous quotes containing the word history:
“History has neither the venerableness of antiquity, nor the freshness of the modern. It does as if it would go to the beginning of things, which natural history might with reason assume to do; but consider the Universal History, and then tell us,when did burdock and plantain sprout first?”
—Henry David Thoreau (18171862)