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Spectroscopic monit...
Spectroscopic monitoring of active galactic nuclei. II. The Seyfert-1 galaxy NGC 3516
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Wanders, I. (author)
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van Groningen, E. (author)
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Alloin, D. (author)
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show more...
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Aretxaga, I. (author)
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Axon, D. (author)
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de Bruyn, A. G. (author)
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Clavel, J. (author)
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Dietrich, M. (author)
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Goad, M. R. (author)
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Gondhalekar, P. (author)
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Horne, K. (author)
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Jackson, N. (author)
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Kollatschny, W. (author)
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Laurikainen, E. (author)
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Lawrence, A. (author)
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Masegosa, J. (author)
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O'Brien, P. T. (author)
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del Olmo, A. (author)
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Penston, M. V. (author)
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Perea, J. (author)
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Perez, E. (author)
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Perez-Fournon, I. (author)
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Perry, J. J. (author)
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Robinson, A. (author)
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Rodriguez Espinosa, J. M. (author)
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Stirpe, G. M. (author)
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Tadhunter, C. (author)
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Terlevich, R. (author)
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Unger, S. (author)
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Wagner, S. J. (author)
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Williams, R. (author)
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- 1993
- 1993
- English.
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In: Astronomy and Astrophysics. - 0004-6361 .- 1432-0746. ; 269:1-2, s. 39-5353
- Related links:
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https://urn.kb.se/re...
Abstract
Subject headings
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- The authors present the results of a five month spectroscopic monitoring campaign of the Seyfert-1 galaxy NGC 3516. Using a new calibration method and applying a correction for seeing differences during the various observations they can scale the spectra to each other with a much higher accuracy than hitherto achieved. NGC 3516 shows large amplitude variations on a time scale of several weeks. Asymmetric profile variations occur on the same time scale as the continuum variations. The authors show the presence of a varying dip on the blue wing of the Hbeta profile, which is not present on the Halpha profile, and which corresponds to the absorption features previously seen in the UV emission lines of NGC 3516. From cross-correlation analysis they find a time lag of 14plusmn2 days for the Halpha and 7plusmn3 days for the Hbeta emission-line response to continuum variations
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Experimental/ astronomical spectra
- Seyfert galaxies
- visible astronomical observations/ AD 1990 01 to 06
- visible
- spectra
- Seyfert-1 galaxy
- NGC 3516
- calibration method
- correction for seeing
- amplitude
- profile variations
- Hbeta
- Halpha profile
- cross-correlation analysis
- time lag
- emission-line response
- continuum variations
- 14 d
- 7 d
- H/ A9850R Active and peculiar galaxies A9850G Radiation and spectra of galaxies A9580J Photographic region astronomical observations/ time 1.2E+06 s
- time 6.0E+05 s/ H/el
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Wanders, I.
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van Groningen, E ...
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Alloin, D.
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Aretxaga, I.
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Axon, D.
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de Bruyn, A. G.
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show more...
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Clavel, J.
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Dietrich, M.
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Goad, M. R.
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Gondhalekar, P.
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Horne, K.
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Jackson, N.
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Kollatschny, W.
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Laurikainen, E.
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Lawrence, A.
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Masegosa, J.
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O'Brien, P. T.
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del Olmo, A.
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Penston, M. V.
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Perea, J.
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Perez, E.
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Perez-Fournon, I ...
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Perry, J. J.
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Robinson, A.
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Rodriguez Espino ...
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Stirpe, G. M.
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Tadhunter, C.
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Terlevich, R.
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Unger, S.
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Wagner, S. J.
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Williams, R.
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show less...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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Uppsala University