Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21320202h&link_type=abstract
American Astronomical Society, AAS Meeting #213, #202.02; Bulletin of the American Astronomical Society, Vol. 41, p.265
Astronomy and Astrophysics
Astronomy
Scientific paper
CCDs first entered service in astronomy in the early 1980's. These early imaging cameras were fantastic compared with previous photometric instruments but horrible by todays standards. With read noise levels of 350 electrons being common and good computers and techniques to deal with digital images scarce, early photometric measurements were limited in their precision. The development of lower noise devices, better CCD controllers, and differential measurement techniques produced a boon in the photometric precision available and routinely reached today by the typical observer. A new suite of CCD detector types, new observational methods, and clever software have led to todays production of amazing photometric precision values, opening the door to new areas of scientific study such as exo-planet transits and detailed searches for low amplitude stellar pulsations. The historical development of precision photometry and the state of the art in the modern era will be discussed.
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