Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.5203d&link_type=abstract
American Astronomical Society Meeting 208, #52.03; Bulletin of the American Astronomical Society, Vol. 38, p.131
Astronomy and Astrophysics
Astronomy
Scientific paper
We have obtained new spectroscopic data of the Seyfert 1 galaxy NGC 3516 via the Far Ultraviolet Spectroscopic Explorer (FUSE). This spectrum was obtained based on X-ray data that showed that the flux state of NGC 3516 was increasing. It provides us with the only high resolution spectrum of NGC 3516 in the far ultraviolet range with a significant signal to noise ratio. We provide the far UV continuum lightcurve of NGC 3516 observed by both FUSE and by the Hopkins Ultraviolet Explorer (HUT) as well as the near UV continuum lightcurve observed by the International Ultraviolet Explorer (IUE), the Faint Object Spectrograph (FOS) and the Space Telescope Imaging Spectrograph (STIS) to show the overall flux state of the galaxy. This lightcurve shows that the continuum flux state for NGC 3516 is increasing. We have fit a H2 spectrum to both the most recent spectrum and to the average spectrum for all 5 FUSE observations to obtain a measure of the column density for several different rotational states. The main focus of our work is to characterize the intrinsic absorption seen in the O IV doublet (λλ 1031.9,1037.6 Å) and in the Lyman β(λ 1025.7 Å) absorption.
Crenshaw D.
Dunn Jay P.
Kraemer Stephan
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