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Photoelectric filter photometry of the flux depression at 5200 A in Ap-stars
A new photometric index was used to characterize the flux depression at5200 A in a photoelectric filter photometric study of a large number ofnormal A-stars, Ap-stars, Am-stars, and Hg-Mn-stars. The new index isdefined as a = g - (h + y)/2, where g and h are the brightnesses at 5240and 5020 A, respectively, measured by interference filters, and y is thebrightness measured with a Stromgren filter. The index reveals a markedcontrast between normal and peculiar stars.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Basakci |
| Sað Açýklýk: | 15h10m36.10s |
| Yükselim: | +06°43'09.1" |
| Görünürdeki Parlaklýk: | 9.977 |
| özdevim Sað Açýklýk: | -4.2 |
| özdevim Yükselim: | -1.2 |
| B-T magnitude: | 10.114 |
| V-T magnitude: | 9.989 |
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INHABITED SKY
