Published 1984
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A study on the existence of periodic components in U,B,V variability of Seyfert galaxy nuclei
Description
The observations on U,B,V bands from Penfold (1979) of the nuclei of 7 Seyfert galaxies: NGC 1566, NGC 3227, IC 4329A, MK50, NGC6814 and NGC 7469, were done in a 14.3'' apperture, aiming to analyse the possibility of periodicity in the variation presented in the three bands and U-B, B-V color indices. A generalization of the method of Data Compensated Fourier Transform (DCDFT), adequated to the observation analysis unequally spaced in time and based on the fitting of periodic functions and, the calculation of multiple correlation coefficient R2 was developed to analyse the data. The analysis revealed a high probability of periodic components in the variations. (author)
Availability note (English)
MF available from INIS under the Report Number.Abstract (Portuguese)
Observacoes U,B,V de Penfold (1979) dos nucleos de 7 galaxias Seyfert: NGC 1566, NGC 3227, IC 4329A, MK50, NG50, NGC6814 e NGC 7469 foram feitas num diafragma de 14.3'' para analisar a possibilidade de periodicidade nas variacoes apresentadas nestas tres bandas e nos indices de cor U-B, B-V. Desenvolveu-se uma generalizacao do metodo 'Data Compensated Fourier Transform' (DCDFT) adequada a analise de observacoes desigualmente espacadas no tempo e baseada no no ajuste de funcoes periodicas aos dados e calculo do coeficiente de correlacao multipla R2. A analise revelou a presenca, com grande probabilidade, de componentes periodicas nas variacoes. (autor)Files
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Additional details
Additional titles
- Original title (Portuguese)
- Um estudo sobre a existencia de componentes periodicas na variabilidade em U,B,V de nucleos de galaxias Seyfert
Publishing Information
- Imprint Pagination
- 252 p.
- Report number
- INIS-BR--1973
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 21041386
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- CORRELATIONS; EMISSION SPECTRA; GALAXY NUCLEI; SEYFERT GALAXIES; VARIATIONS
- Descriptors DEC
- GALAXIES; SPECTRA