Abstract
view Abstract Citations References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Photographic Search for Comets During 12 November Solar Eclispe. Courten, Henry C. ; Genberg, Richard W. Abstract Under NASA grant to Adelphi University a four- man team set up and operated a ground-based photographic station in Bage' in southern Brazil at the centerline of the eclipse path. Specially modified aerial cameras with coverage out to 40 solar radii were used with interference filters and 8 X 10 in. glass plates to search for small bright comets proximate to the sun. Although a high thin atmospheric haze resulted in a rather high level of sky background, star images to mag + 7 were recorded, along with excellent images of the coronal structure. The comet search equipment is a follow-on to the initial search conducted by Dr. B. Donn and Dr. Francois Dossin during the 1963 total eclipse. The most recent effort was enhanced by direct cooperation with Wesleyan University (Van Vleck Observatory) which, under NASA grant, supported an airborne observer with identical photographic equipment. This brief report describes the techniques and equipment used by the Adelphi group. Projection slides exhibit the filter characteristics as matched to the camera lens transmission curve, the equipment erected and ready for field operation, and several sample photographs showing coronal detail. Because of the practical difficulties inherent in reproducing very fine star and comet images artifi- cially enhanced slides of the original negatives are shown. Complete reduction and analysis of the plates is expected to take several more weeks; therefore conclusions on the existence of the family of comets predicted by Dr. P Swings cannot be drawn at this time. Comparison of very recent star plates with those exposed during the eclipse will be accomplished within the next few weeks. Since the earlier stellar images are too faint for blink comparison the simple, yet effective, techniques which are being employed in the analysis are described. Publication: The Astronomical Journal Pub Date: October 1967 DOI: 10.1086/110483 Bibcode: 1967AJ.....72R.791C full text sources ADS |
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