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Steps toward Determination of the Size and Structure of the Broad‐Line Region in Active Galactic Nuclei. IX. Ultraviolet Observations of Fairall 9

Rodriguez‐Pascual, P. M.; Alloin, D.; Clavel, J.; Crenshaw, D. M.; Horne, K.; Kriss, G. A.; Krolik, J. H.; Malkan, M. A.; Netzer, H.; O, P. T.; Peterson, B. M.; Reichert, G. A.; Wamsteker, W.; Alexander, T.; Barr, P.; Blandford, R. D.; Bregman, J. N.; Carone, T. E.; Clements, S.; Courvoisier, T.‐J.; De Robertis, M. M.; Dietrich, M.; Dottori, H.; Edelson, R. A.; Filippenko, A. V.; Gaskell, C. M.; Huchra, J. P.; Hutchings, J. B.; Kollatschny, W.; Koratkar, A. P.; Korista, K. T.; Laor, A.; MacAlpine, G. M.; Martin, P. G.; Maoz, D.; McCollum, B.; Morris, S. L.; Perola, G. C.; Pogge, R. W.; Ptak, R. L.; Recondo‐Gonzalez, M. C.; Rodriguez‐Espinoza, J. M.; Rokaki, E. L.; Santos‐Lleo, M.; Sekiguchi, K.; Shull, J. M.; Snijders, M. A. J.; Sparke, L. S.; Stirpe, G. M.; Stoner, R. E.; Sun, W.‐H.; Wagner, S. J.; Wanders, I.; Wilkes, Belinda Jane; Winge, C.; Zheng, W. (IOP Publishing, 1997)

An 8 month monitoring campaign on the Seyfert 1 galaxy Fairall 9 has been conducted with the International Ultraviolet Explorer in an attempt to obtain reliable estimates of continuum-continuum and continuum-emission-line ...

The Cambridge-Cambridge ROSAT Serendipity Survey -- IV. The X-ray properties

Ciliegi, P.; Elvis, Martin S.; Wilkes, Belinda Jane; Boyle, B. J.; McMahon, R. G. (Oxford University Press (OUP), 1997)

We present a detailed X-ray spectral analysis in the 0.1–2.4 keV ROSAT band of a complete sample of X-ray-selected AGN using the 80 AGNs in the Cambridge-Cambridge ROSAT Serendipity Survey (68 QSOs and 12 narrow-emission-line ...

Testing Unified X-Ray/Ultraviolet Absorber Models with NGC 5548

Mathur, Smita; Elvis, Martin S.; Wilkes, Belinda Jane (IOP Publishing, 1995)

The bright Seyfert galaxy NGC 5548 shows absorption features in its X-ray and UV spectra. The large amount of optical/UV and X-ray monitoring data available for this object makes it an ideal candidate to test our model of ...

Multiple Velocity Components in the C iv Absorption Line of NGC 5548

Mathur, Smita; Elvis, Martin S.; Wilkes, Belinda Jane (IOP Publishing, 1999)

We have observed the much-studied Seyfert 1 galaxy NGC 5548 with the Goddard High-Resolution Spectrograph (GHRS) on the Hubble Space Telescope (HST). Our 14 ks observation covers the C IV emission line at a resolution of ...

Optical Continuum and Emission‐Line Variability of the Seyfert 1 Galaxy Markarian 509

Carone, T. E.; Peterson, B. M.; Bechtold, J.; Bertram, R.; Bischoff, K.; Dietrich, M.; Filppenko, A. V.; Ho, L. C.; Huchra, J; Kollatchny, W.; Korista, K. T.; Matheson, T.; Pogge, R. W.; Shields, J. C.; Smith, P. S.; Wagner, R. M.; Wilkes, Belinda Jane (IOP Publishing, 1996)

We report on the results of a 5 year coordinated program of spectroscopic monitoring of the luminous Seyfert 1 galaxy Markarian 509. The Hβ and He II λ4686 emission lines are found to respond to continuum variations with ...

Steps toward Determination of the Size and Structure of the Broad‐Line Region in Active Galactic Nuclei. XV. Long‐Term Optical Monitoring of NGC 5548

Peterson, B. M.; Barth, A. J.; Berlind, P.; Bertram, R.; Bischoff, K.; Bochkarev, N. G.; Burenkov, A. N.; Cheng, F.‐Z.; Dietrich, M.; Filippenko, A. V.; Giannuzzo, E.; Ho, L. C.; Huchra, J; Hunley, J.; Kaspi, S.; Kollatschny, W.; Leonard, D. C.; Malkov, Yu. F.; Matheson, T.; Mignoli, M.; Nelson, B.; Papaderos, P.; Peters, J.; Pogge, R. W.; Pronik, V. I.; Sergeev, S. G.; Sergeeva, E. A.; Shapovalova, A. I.; Stirpe, G. M.; Tokarz, S.; Wagner, R. M.; Wanders, I.; Wei, J.‐Y.; Wilkes, Belinda Jane; Wu, H.; Xue, S.‐J.; Zou, Z.‐L. (IOP Publishing, 1999)

We present the results of 3 yr of ground-based observations of the Seyfert 1 galaxy NGC 5548, which, combined with previously reported data, yield optical continuum and broad-line Hβ light curves for a total of 8 yr. The ...

The X‐Ray Warm Absorber in NGC 3516

Mathur, Smita; Wilkes, Belinda Jane; Aldcroft, Thomas L. (IOP Publishing, 1997)

The Seyfert 1 galaxy, NGC 3516 has been the subject of many absorption line studies at both ultraviolet and X-ray wavelengths. In the UV, strong, broad, variable associated metal line absorption with velocity width ~2000 ...

Multiwavelength Observations of Short-Timescale Variability in NGC 4151. I. Ultraviolet Observations

Crenshaw, D. M.; Rodriguez-Pascual, P. M.; Penton, S. V.; Edelson, R. A.; Alloin, D.; Ayres, T. R.; Clavel, J.; Horne, K.; Johnson, W. N.; Kaspi, S.; Korista, K. T.; Kriss, G. A.; Krolik, J. H.; Malkan, M. A.; Maoz, D.; Netzer, H.; O, P. T.; Peterson, B. M.; Reichert, G. A.; Shull, J. M.; Ulrich, M.-H.; Wamsteker, W.; Warwick, R. S.; Yaqoob, T.; Balonek, T. J.; Barr, P.; Bromage, G. E.; Carini, M.; Carone, T. E.; Cheng, F.-Z.; Chuvaev, K. K.; Dietrich, M.; Doroshenko, V. T.; Dultzin-Hacyan, D.; Filippenko, A. V.; Gaskell, C. M.; Glass, I. S.; Goad, M. R.; Hutchings, J.; Kazanas, D.; Kollatschny, W.; Koratkar, A. P.; Laor, A.; Leighly, K.; Lyutyi, V. M.; MacAlpine, G. M.; Malkov, Yu. F.; Martin, P. G.; McCollum, B.; Merkulova, N. I.; Metik, L.; Metlov, V. G.; Miller, H. R.; Morris, S. L.; Oknyanskij, V. L.; Penfold, J.; Perez, E.; Perola, G. C.; Pike, G.; Pogge, R. W.; Pronik, I.; Pronik, V. I.; Ptak, R. L.; Recondo-Gonzalez, M. C.; Rodriguez-Espinoza, J. M.; Rokaki, E. L.; Roland, J.; Sadun, A. C.; Salamanca, I.; Santos-Lleo, M.; Sergeev, S. G.; Smith, S. M.; Snijders, M. A. J.; Sparke, L. S.; Stirpe, G. M.; Stoner, R. E.; Sun, W.-H.; van Groningen, E.; Wagner, R. M.; Wagner, S.; Wanders, I.; Welsh, W. F.; Weymann, R. J.; Wilkes, Belinda Jane; Zheng, W. (IOP Publishing, 1996)

We present the results of an intensive ultraviolet monitoring campaign on the Seyfert I galaxy NGC 4151, as part of an effort to study its short-timescale variability over a broad range in wavelength. The nucleus of NGC ...

Multiwavelength Observations of Short-Timescale Variability in NGC 4151. IV. Analysis of Multiwavelength Continuum Variability

Edelson, R. A.; Alexander, T.; Crenshaw, D. M.; Kaspi, S.; Malkan, M. A.; Peterson, B. M.; Warwick, R. S.; Clavel, J.; Filippenko, A. V.; Horne, K.; Korista, K. T.; Kriss, G. A.; Krolik, J. H.; Maoz, D.; Nandra, K.; O, P. T.; Penton, S. V.; Yaqoob, T.; Albrecht, P.; Alloin, D.; Ayres, T. R.; Balonek, T. J.; Barr, P.; Barth, A. J.; Bertram, R.; Bromage, G. E.; Carini, M.; Carone, T. E.; Cheng, F.-Z.; Chuvaev, K. K.; Dietrich, M.; Dultzin-Hacyan, D.; Gaskell, C. M.; Glass, I. S.; Goad, M. R.; Hemar, S.; Ho, L. C.; Huchra, J; Hutchings, J.; Johnson, W. N.; Kazanas, D.; Kollatschny, W.; Koratkar, A. P.; Kovo, O.; Laor, A.; MacAlpine, G. M.; Magdziarz, P.; Martin, P. G.; Matheson, T.; McCollum, B.; Miller, H. R.; Morris, S. L.; Oknyanskij, V. L.; Penfold, J.; Perez, E.; Perola, G. C.; Pike, G.; Pogge, R. W.; Ptak, R. L.; Qian, B.-C.; Recondo-Gonzalez, M. C.; Reichert, G. A.; Rodriguez-Espinoza, J. M.; Rodriguez-Pascual, P. M.; Rokaki, E. L.; Roland, J.; Sadun, A. C.; Salamanca, I.; Santos-Lleo, M.; Shields, J. C.; Shull, J. M.; Smith, D. A.; Smith, S. M.; Snijders, M. A. J.; Stirpe, G. M.; Stoner, R. E.; Sun, W.-H.; Ulrich, M.-H.; van Groningen, E.; Wagner, R. M.; Wagner, S.; Wanders, I.; Welsh, W. F.; Weymann, R. J.; Wilkes, Belinda Jane; Wu, H.; Wurster, J.; Xue, S.-J.; Zdziarski, A. A.; Zheng, W.; Zou, Z.-L. (IOP Publishing, 1996)

This paper combines data from the three preceding papers in order to analyze the multi-wave-band variability and spectral energy distribution of the Seyfert I galaxy NGC 4151 during the 1993 December monitoring campaign. ...

ASCA observations of two steep soft X-ray quasars

Fiore, F.; Matt, G.; Cappi, M.; Elvis, Martin S.; Leighly, K. M.; Nicastro, F.; Piro, L.; Siemiginowska, Aneta L.; Wilkes, Belinda Jane (Oxford University Press (OUP), 1998)

Steep soft X-ray (0.1-2 keV) quasars share several unusual properties: narrow Balmer lines, strong FeII emission, large and fast X-ray variability, rather steep 2-10 keV spectrum. These intriguing objects have been suggested ...