... Archive

http://irsa.ipac.caltech.edu/applications/DUST/

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... line

An upper limit of 80 eV was derived on the equivalent width of a 6.4 keV line with ASCA (Lin et al. 2002). Our data are consistent with this limit, but due to the limited statistics cannot improve it.

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... tentative

Indeed Lin et al. (2002) mentioned the possibility that this periodicity be spurious, due to the unusual shape of the light curve and the fact that the observation in which it was detected spanned only two cycles of the putative period.

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