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CA II H and K measurements made at Mount Wilson Observatory, 1966-1983
Summaries are presented of the photoelectric measurements of stellar CaII H and K line intensity made at Mount Wilson Observatory during theyears 1966-1983. These results are derived from 65,263 individualobservations of 1296 stars. For each star, for each observing season,the maximum, minimum, mean, and variation of the instrumental H and Kindex 'S' are given, as well as a measurement of the accuracy ofobservation. A total of 3110 seasonal summaries are reported. Factorswhich affect the ability to detect stellar activity variations andaccurately measure their amplitudes, such as the accuracy of the H and Kmeasurements and scattered light contamination, are discussed. Relationsare given which facilitate intercomparison of 'S' values with residualintensities derived from ordinary spectrophotometry, and for convertingmeasurements to absolute fluxes.
| Photometrie de la comete Arend-Roland.
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Membro dei seguenti gruppi:
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Osservazione e dati astrometrici
| Costellazione: | Pesci |
| Ascensione retta: | 00h17m41.48s |
| Declinazione: | +01°19'25.8" |
| Magnitudine apparente: | 9.3 |
| Moto proprio RA: | 64.8 |
| Moto proprio Dec: | 5.9 |
| B-T magnitude: | 9.971 |
| V-T magnitude: | 9.356 |
Cataloghi e designazioni:
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