... stars with more than 1,500 total detected electrons and no measurable difference in ... for faint stars, because background electrons fill the traps before such stars pass ...
... Figure 4.20: Images Illustrating CTE Residual Trail. (a) Image of star field taken in broad band filter on PC1. (b) 1500s dark exposure taken immediately following (a). ...
... Figure 4.20: Images Illustrating CTE Residual Trail. (a) Image of star field taken in broad band filter on PC1. (b) 1500s dark exposure taken immediately following (a). ...
... The length of the startrails obtained in the gyro guiding mode are also several times longer than expected; measured drift rates are characteristically five milliarcseconds/second. ...
... Energetic particles damage the silicon lattice of the CCD detectors and create charge traps, leading to the characteristic charge trails seen extending away from bright stars, hot pixels and cosmic rays in ACS images. ...
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Ссылки http://www.stsci.edu/hst/acs/documents/posters/ACS_CTE_Loss_Overview_Methods.pdf -- 1269.1 Кб -- 05.02.2013 Похожие документы
... A few observers have begun to notice very faint vertical trails on brighter stars and cosmic rays in short exposure images; these are merely a manifestation of the slowly increasing CTE effect (see related items below). ...
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Ссылки http://www.stsci.edu/~webdocs/STScINewsletter/1999/stsci.news.9.99.pdf -- 280.6 Кб -- 19.01.2009 Похожие документы
... The observation was reported to look okay, and had a moving object which trailed across the image. ... Interstellar Absorption Lines) Two absorption line observations were made of the central star in protoplanetary nebula IC3568 ...
... 3-7 shows the relative "jitter" of star images as they trail across the fields of ... Star-trail data taken with the Canada-France-Hawaii Telescope on Arcsec Figure 3-7. ... Relative image motion for trailedstars at Mauna Kea and Pittsburgh. ...
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Ссылки http://www.stsci.edu/ftp/ExInEd/electronic_reports_folder/TOPS.pdf -- 902.9 Кб -- 23.08.1995 Похожие документы
... 1.987 ± 0.02 2.003 ± 0.02 2.006 ± 0.02 1.955 ± 0.02 Read Noise and Gain Settings 83 Figure 4.11: Images Illustrating CTE Residual Trail. (a) Image of star field taken in broad band filter on PC1. (b) 1500s dark exposure taken immediately following (a ...
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Ссылки http://www.stsci.edu/hst/wfpc2/documents/handbook/ch4_ccd.ps -- 2203.7 Кб -- 05.02.2013 Похожие документы