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Дата изменения: Wed Jul 24 04:09:08 1996 Дата индексирования: Tue Feb 5 06:03:12 2013 Кодировка: Поисковые слова: mercury surface |
where the term A contains the time-independent noise sources
and B contains the time-dependent noise sources
and
Equations for aperture photometry (6.7) and extended sources (6.12) can be solved with similar results. Parameters are as described in Tables 6.6, 6.8, and 6.9. We again note that the on-line WFPC2 Exposure Time Calculator program provides an easy method for these calculations.