Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/sas/8.0.0/doc/omdetect/node36.html
Дата изменения: Wed Oct 22 17:31:26 2008
Дата индексирования: Tue Aug 18 14:54:07 2009
Кодировка:
Поисковые слова: межпланетная пыль
Source X and Y coordinates XMM-Newton SAS Home Page
XMM-Newton Science Analysis System


omdetect (omdetect-5.14.2) [???]

Deficiencies Home Page Source shape parameters (semi-major/minor Home Index

Meta Index / Home Page

Source X and Y coordinates

The position of a source on the image (XPOS and YPOS) are referred to a coordinate origin in which the pixel at the far-left and bottom of the image has coordinates 1.0, 1.0. The coordinates are computed using the first-order moments of the intensity profile, and the algorithm is similar to that used in the sextractor program (please see the sextractor manual for a detailed discussion).


XMM-Newton SOC/SSC -- 2008-10-22