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Observations of the infrared radiation from the nuclei of NGC 1068 and NGC 4151 (1974)

Merrill, K. M. ; Stein, W. A. ; Gillett, F. C.

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Publication Date: 2011-08-16

Description: Data resulting from monitoring the flux of radiation at 11 microns from NGC 1068 and NGC 4151 are presented. There is some evidence for changes of flux of 50% on a time scale of approximately 100 days from NGC 4151. This evidence is suggestive but not compelling. Limits are set on the possible change of the 11-micron flux from NGC 1068. The energy distribution of radiation from NGC 1068 between 8 and 13 microns has been shown to have no spectral features within the accuracy and resolution of our measurement. This is in contrast to energy distributions observed from galactic sources in which the source of energy is generally interpreted as thermal reradiation from grains.

Keywords: SPACE RADIATION

Type: Astrophysical Journal; 187; Jan. 15

Format: text

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