Costantini, E.Nicastro, F.Fruscione, AntonellaMathur, S.Comastri, A.Elvis, MartinFiore, F.Salvini, C.Stirpe, G. M.Vignali, C.Wilkes, BelindaO’Brien, P. T.Goad, M. R.2017-02-132000Costantini, E., F. Nicastro, A. Fruscione, S. Mathur, A. Comastri, M. Elvis, F. Fiore, et al. 2000. “The Complex X‐Ray Absorbers of NGC 3516 Observed by BEPPOSAX.” The Astrophysical Journal 544 (1) (November 20): 283–292. doi:10.1086/317200.0004-637Xhttp://nrs.harvard.edu/urn-3:HUL.InstRepos:30212189In this paper we present the analysis of two broadband (0.1-150 keV) BeppoSAX observations of the Seyfert 1 galaxy NGC 3516. The two observations were taken 4 months apart, on 1996 November 8 and 1997 March 12. We report a dramatic change in the degree of obscuration of the central source between the two observations and propose, as possible explanations, transient absorption by either a stationary-state cloud of cold gas crossing the line of sight or a varying-state, initially neutral and dense amount of expanding gas with decreasing density and therefore decreasing opacity. We also report the detection of a second highly ionized absorber/emitter, which causes deep Fe XVII-XXII K edges at ~7.8 keV to appear in both of the BeppoSAX spectra of NGC 3516 and possibly produces the soft X-ray continuum emission in the 1 keV blend of Fe L recombination lines detected during the epoch of heavy nuclear obscuration.en-USGalaxies : individual (NGC 3516)Galaxies: SeyfertX-rays: galaxiesJournal Article2017-02-1310.1086/317200