Spectroscopic monitoring of active galactic nuclei. II - The Seyfert-1 galaxy NGC 3516

I. Wanders; E. van Groningen; D. Alloin; I. Aretxaga; D. Axon; A. G. de Bruyn; J. Clavel; M. Dietrich; M. R. Goad; P. Gondhalekar; K. Horne; N. Jackson; W. Kollatschny; E. Laurikainen; A. Lawrence; J. Masegosa; P. T. O'Brien; A. del Olmo; M. V. Penston; J. Perea; E. Perez; I. Perez-Fournon; J. J. Perry; A. Robinson; J. M. Rodriguez Espinosa; G. M. Stirpe; C. Tadhunter; R. Terlevich; S. Unger; S. J. Wagner; R. Williams

Spectroscopic monitoring of active galactic nuclei. II - The Seyfert-1 galaxy NGC 3516

I. Wanders, E. van Groningen, D. Alloin, I. Aretxaga, D. Axon, A. G. de Bruyn, J. Clavel, M. Dietrich, M. R. Goad, P. Gondhalekar, K. Horne, N. Jackson, W. Kollatschny, E. Laurikainen, A. Lawrence, J. Masegosa, P. T. O'Brien, A. del Olmo, M. V. Penston, J. PereaE. Perez, I. Perez-Fournon, J. J. Perry, A. Robinson, J. M. Rodriguez Espinosa, G. M. Stirpe, C. Tadhunter, R. Terlevich, S. Unger, S. J. Wagner, R. Williams

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We present 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 we 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. We show the presence of a varying dip on the blue wing of the H-beta profile, which is not present on the H-alpha profile, and which corresponds to the absorption features previously seen in the UV emission lines of NGC 3516. From cross-correlation analysis we find a time lag of 14 +/- 2 days for the H-alpha and 7 +/- 3 days for the H-beta emission-line response to continuum variations.

Original language	English
Pages (from-to)	39-53
Journal	Astronomy and Astrophysics
Volume	269
Publication status	Published - 1 Mar 1993

Keywords / Materials (for Non-textual outputs)

Active Galactic Nuclei
Astronomical Spectroscopy
Seyfert Galaxies
H Alpha Line
Line Shape

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http://adsabs.harvard.edu/abs/1993A%26A...269...39W

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Wanders, I., van Groningen, E., Alloin, D., Aretxaga, I., Axon, D., de Bruyn, A. G., Clavel, J., Dietrich, M., Goad, M. R., Gondhalekar, P., Horne, K., Jackson, N., Kollatschny, W., Laurikainen, E., Lawrence, A., Masegosa, J., O'Brien, P. T., del Olmo, A., Penston, M. V., ... Williams, R. (1993). Spectroscopic monitoring of active galactic nuclei. II - The Seyfert-1 galaxy NGC 3516. Astronomy and Astrophysics, 269, 39-53. http://adsabs.harvard.edu/abs/1993A%26A...269...39W

@article{6a6c6107040c4bba8bb0abf4ceb2ab4d,

title = "Spectroscopic monitoring of active galactic nuclei. II - The Seyfert-1 galaxy NGC 3516",

abstract = "We present 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 we 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. We show the presence of a varying dip on the blue wing of the H-beta profile, which is not present on the H-alpha profile, and which corresponds to the absorption features previously seen in the UV emission lines of NGC 3516. From cross-correlation analysis we find a time lag of 14 +/- 2 days for the H-alpha and 7 +/- 3 days for the H-beta emission-line response to continuum variations.",

keywords = "Active Galactic Nuclei, Astronomical Spectroscopy, Seyfert Galaxies, H Alpha Line, Line Shape",

author = "I. Wanders and {van Groningen}, E. and D. Alloin and I. Aretxaga and D. Axon and {de Bruyn}, {A. G.} and J. Clavel and M. Dietrich and Goad, {M. R.} and P. Gondhalekar and K. Horne and N. Jackson and W. Kollatschny and E. Laurikainen and A. Lawrence and J. Masegosa and O'Brien, {P. T.} and {del Olmo}, A. and Penston, {M. V.} and J. Perea and E. Perez and I. Perez-Fournon and Perry, {J. J.} and A. Robinson and {Rodriguez Espinosa}, {J. M.} and Stirpe, {G. M.} and C. Tadhunter and R. Terlevich and S. Unger and Wagner, {S. J.} and R. Williams",

year = "1993",

month = mar,

day = "1",

language = "English",

volume = "269",

pages = "39--53",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Wanders, I, van Groningen, E, Alloin, D, Aretxaga, I, Axon, D, de Bruyn, AG, Clavel, J, Dietrich, M, Goad, MR, Gondhalekar, P, Horne, K, Jackson, N, Kollatschny, W, Laurikainen, E, Lawrence, A, Masegosa, J, O'Brien, PT, del Olmo, A, Penston, MV, Perea, J, Perez, E, Perez-Fournon, I, Perry, JJ, Robinson, A, Rodriguez Espinosa, JM, Stirpe, GM, Tadhunter, C, Terlevich, R, Unger, S, Wagner, SJ & Williams, R 1993, 'Spectroscopic monitoring of active galactic nuclei. II - The Seyfert-1 galaxy NGC 3516', Astronomy and Astrophysics, vol. 269, pp. 39-53. <http://adsabs.harvard.edu/abs/1993A%26A...269...39W>

TY - JOUR

T1 - Spectroscopic monitoring of active galactic nuclei. II - The Seyfert-1 galaxy NGC 3516

AU - Wanders, I.

AU - van Groningen, E.

AU - Alloin, D.

AU - Aretxaga, I.

AU - Axon, D.

AU - de Bruyn, A. G.

AU - Clavel, J.

AU - Dietrich, M.

AU - Goad, M. R.

AU - Gondhalekar, P.

AU - Horne, K.

AU - Jackson, N.

AU - Kollatschny, W.

AU - Laurikainen, E.

AU - Lawrence, A.

AU - Masegosa, J.

AU - O'Brien, P. T.

AU - del Olmo, A.

AU - Penston, M. V.

AU - Perea, J.

AU - Perez, E.

AU - Perez-Fournon, I.

AU - Perry, J. J.

AU - Robinson, A.

AU - Rodriguez Espinosa, J. M.

AU - Stirpe, G. M.

AU - Tadhunter, C.

AU - Terlevich, R.

AU - Unger, S.

AU - Wagner, S. J.

AU - Williams, R.

PY - 1993/3/1

Y1 - 1993/3/1

N2 - We present 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 we 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. We show the presence of a varying dip on the blue wing of the H-beta profile, which is not present on the H-alpha profile, and which corresponds to the absorption features previously seen in the UV emission lines of NGC 3516. From cross-correlation analysis we find a time lag of 14 +/- 2 days for the H-alpha and 7 +/- 3 days for the H-beta emission-line response to continuum variations.

AB - We present 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 we 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. We show the presence of a varying dip on the blue wing of the H-beta profile, which is not present on the H-alpha profile, and which corresponds to the absorption features previously seen in the UV emission lines of NGC 3516. From cross-correlation analysis we find a time lag of 14 +/- 2 days for the H-alpha and 7 +/- 3 days for the H-beta emission-line response to continuum variations.

KW - Active Galactic Nuclei

KW - Astronomical Spectroscopy

KW - Seyfert Galaxies

KW - H Alpha Line

KW - Line Shape

M3 - Article

SN - 0004-6361

VL - 269

SP - 39

EP - 53

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

Spectroscopic monitoring of active galactic nuclei. II - The Seyfert-1 galaxy NGC 3516

Abstract

Keywords / Materials (for Non-textual outputs)

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