An analysis of solar observations from the San Fernando Observatory extreme limb photometer

Includes bibliographical references (pages 44-45)Presented is an analysis of extreme limb photometer (ELP) data obtained at the San Fernando Observatory in 1982. Examination of facular regions at 525 nm reveals an increasing contrast from ?? =.19 to ?? =.11, where ?? is the cosine of the heliocentric angle ??. The contrast ratio of 1.51 ?? 0.23 fits the ??-1 dependence observed by Klabunde (1981), and indicates a need to reexamine facular models that predict a decreasing contrast. A comparison of the facular oblateness signal formed by this and previous ELP data (Chapman and Klabunde, 1982) to the excess solar oblateness measured by an occulting disk method (Dicke and Goldenberg, 1967; Dicke, Kuhn, and Libbrecht, 1985) suggests that there is a significant facular influence in such measurements