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Browsing by Author "Brenneman, L. W."

Browsing by Author "Brenneman, L. W."

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  • The Broad-band X-Ray Spectrum of IC 4329A from a Joint NuSTAR/Suzaku Observation 
    Brenneman, L. W.; Madejski, G.; Fuerst, F.; Matt, G.; Elvis, M.; Harrison, F. A.; Ballantyne, D. R.; Boggs, S. E.; Christensen, F. E.; Craig, W. W.; Fabian, A. C.; Grefenstette, B. W.; Hailey, C. J.; Madsen, K. K.; Marinucci, A.; Rivers, E.; Stern, D.; Walton, D. J.; Zhang, W. W. (2014)
    We have obtained a deep, simultaneous observation of the bright, nearby Seyfert galaxy IC 4329A with Suzaku and NuSTAR. Through a detailed spectral analysis, we are able to robustly separate the continuum, absorption, and ...
  • The changing X-ray time lag in MCG-6-30-15 
    Kara, E.; Fabian, A. C.; Marinucci, A.; Matt, G.; Parker, M. L.; Alston, W.; Brenneman, L. W.; Cackett, E. M.; Miniutti, G. (2014)
    MCG-6-30-15 is one of the most observed narrow-line Seyfert 1 galaxies in the X-ray band. In this paper, we examine the X-ray time lags in this source using a total of 600 ks in observations (440 ks exposure) taken with ...
  • An examination of the spectral variability in NGC 1365 with Suzaku 
    Brenneman, L. W.; Risaliti, G.; Elvis, M.; Nardini, E. (2013)
    We present jointly analysed data from three deep Suzaku observations of NGC 1365. These high-signal-to-noise spectra enable us to examine the nature of this variable, obscured active galactic nucleus (AGN) in unprecedented ...
  • Hitomi Constraints on the 3.5 keV Line in the Perseus Galaxy Cluster 
    Aharonian, F. A.; Akamatsu, H.; Akimoto, F.; Allen, S. W.; Angelini, L.; Arnaud, K. A.; Audard, M.; Awaki, H.; Axelsson, M.; Bamba, A.; Bautz, M. W.; Blandford, R. D.; Bulbul, E.; Brenneman, L. W.; Brown, G. V.; Cackett, E. M.; Chernyakova, M.; Chiao, M. P.; Coppi, P.; Costantini, E.; de Plaa, J.; den Herder, J. -W; Done, C.; Dotani, T.; Ebisawa, K.; Eckart, M. E.; Enoto, T.; Ezoe, Y.; Fabian, A. C.; Ferrigno, C.; Foster, A. R.; Fujimoto, R.; Fukazawa, Y.; Furuzawa, A.; Galeazzi, M.; Gallo, L. C.; Gandhi, P.; Giustini, M.; Goldwurm, A.; Gu, L.; Guainazzi, M.; Haba, Y.; Hagino, K.; Hamaguchi, K.; Harrus, I.; Hatsukade, I.; Hayashi, K.; Hayashi, T.; Hayashida, K.; Hiraga, J.; Hornschemeier, A. E.; Hoshino, A.; Hughes, J. P.; Ichinohe, Y.; Iizuka, R.; Inoue, H.; Inoue, S.; Inoue, Y.; Ishibashi, K.; Ishida, M.; Ishikawa, K.; Ishisaki, Y.; Itoh, M.; Iwai, M.; Iyomoto, N.; Kaastra, J. S.; Kallman, T.; Kamae, T.; Kara, E.; Kataoka, J.; Katsuda, S.; Katsuta, J.; Kawaharada, M.; Kawai, N.; Kelley, R. L.; Khangulyan, D.; Kilbourne, C. A.; King, A. L.; Kitaguchi, T.; Kitamoto, S.; Kitayama, T.; Kohmura, T.; Kokubun, M.; Koyama, S.; Koyama, K.; Kretschmar, P.; Krimm, H. A.; Kubota, A.; Kunieda, H.; Laurent, P.; Lebrun, F.; Lee, S. -H; Leutenegger, M. A.; Limousin, O.; Loewenstein, M.; Long, K. S.; Lumb, D. H.; Madejski, G. M.; Maeda, Y.; Maier, D.; Makishima, K.; Markevitch, M.; Matsumoto, H.; Matsushita, K.; McCammon, D.; McNamara, B. R.; Mehdipour, M.; Miller, E. D.; Miller, J. M.; Mineshige, S.; Mitsuda, K.; Mitsuishi, I.; Miyazawa, T.; Mizuno, T.; Mori, H.; Mori, K.; Moseley, H.; Mukai, K.; Murakami, H.; Murakami, T.; Mushotzky, R. F.; Nakagawa, T.; Nakajima, H.; Nakamori, T.; Nakano, T.; Nakashima, S.; Nakazawa, K.; Nobukawa, K.; Nobukawa, M.; Noda, H.; Nomachi, M.; O'Dell, S. L.; Odaka, H.; Ohashi, T.; Ohno, M.; Okajima, T.; Ota, N.; Ozaki, M.; Paerels, F.; Paltani, S.; Parmar, A.; Petre, R.; Pinto, C.; Pohl, M.; Porter, F. S.; Pottschmidt, K.; Ramsey, B. D.; Reynolds, C. S.; Russell, H. R.; Safi-Harb, S.; Saito, S.; Sakai, K.; Sameshima, H.; Sasaki, T.; Sato, G.; Sato, K.; Sato, R.; Sawada, M.; Schartel, N.; Serlemitsos, P. J.; Seta, H.; Shidatsu, M.; Simionescu, A.; Smith, R. K.; Soong, Y.; Stawarz, L.; Sugawara, Y.; Sugita, S.; Szymkowiak, A. E.; Tajima, H.; Takahashi, H.; Takahashi, T.; Takeda, S.; Takei, Y.; Tamagawa, T.; Tamura, K.; Tamura, T.; Tanaka, T.; Tanaka, Yasuo; Tanaka, Yasuyuki; Tashiro, M.; Tawara, Y.; Terada, Y.; Terashima, Y.; Tombesi, F.; Tomida, H.; Tsuboi, Y.; Tsujimoto, M.; Tsunemi, H.; Tsuru, T.; Uchida, H.; Uchiyama, H.; Uchiyama, Y.; Ueda, S.; Ueda, Y.; Ueno, S.; Uno, S.; Urry, C. M.; Ursino, E.; de Vries, C. P.; Watanabe, S.; Werner, N.; Wik, D. R.; Wilkins, D. R.; Williams, B. J.; Yamada, S.; Yamaguchi, H.; Yamaoka, K.; Yamasaki, N. Y.; Yamauchi, M.; Yamauchi, S.; Yaqoob, T.; Yatsu, Y.; Yonetoku, D.; Yoshida, A.; Zhuravleva, I.; Zoghbi, A.; Hitomi Collaboration (2017)
    High-resolution X-ray spectroscopy with Hitomi was expected to resolve the origin of the faint unidentified E˜ 3.5 {keV} emission line reported in several low-resolution studies of various massive systems, such as galaxies ...
  • Irradiation of an accretion disc by a jet: general properties and implications for spin measurements of black holes 
    Dauser, T.; Garcia, J.; Wilms, J.; Böck, M.; Brenneman, L. W.; Falanga, M.; Fukumura, K.; Reynolds, C. S. (2013)
    X-ray irradiation of the accretion disc leads to strong reflection features, which are then broadened and distorted by relativistic effects. We present a detailed, general relativistic approach to model this irradiation ...
  • Measuring the Coronal Properties of IC 4329A with NuSTAR 
    Brenneman, L. W.; Madejski, G.; Fuerst, F.; Matt, G.; Elvis, M.; Harrison, F. A.; Ballantyne, D. R.; Boggs, S. E.; Christensen, F. E.; Craig, W. W.; Fabian, A. C.; Grefenstette, B. W.; Hailey, C. J.; Madsen, K. K.; Marinucci, A.; Rivers, E.; Stern, D.; Walton, D. J.; Zhang, W. W. (2014)
    We present an analysis of a ~160 ks NuSTAR observation of the nearby bright Seyfert galaxy IC 4329A. The high-quality broadband spectrum enables us to separate the effects of distant reflection from the direct coronal ...
  • Multi-epoch X-ray observations of the Seyfert 1.2 galaxy Mrk 79: bulk motion of the illuminating X-ray source 
    Gallo, L. C.; Miniutti, G.; Miller, J. M.; Brenneman, L. W.; Fabian, A. C.; Guainazzi, M.; Reynolds, C. S. (2011)
  • The Multi-layer Variable Absorbers in NGC 1365 Revealed by XMM-Newton and NuSTAR 
    Rivers, E.; Risaliti, G.; Walton, D. J.; Harrison, F.; Arévalo, P.; Baur, F. E.; Boggs, S. E.; Brenneman, L. W.; Brightman, M.; Christensen, F. E.; Craig, W. W.; Fürst, F.; Hailey, C. J.; Hickox, R. C.; Marinucci, A.; Reeves, J.; Stern, D.; Zhang, W. W. (2015)
    Between 2012 July and 2013 February, NuSTAR and XMM-Newton performed four long-look joint observations of the type 1.8 Seyfert, NGC 1365. We have analyzed the variable absorption seen in these observations in order to ...
  • The Nature of the Broadband X-Ray Variability in the Dwarf Seyfert Galaxy NGC 4395 
    Kammoun, E. S.; Nardini, E.; Zoghbi, A.; Miller, J. M.; Cackett, E. M.; Gallo, E.; Reynolds, M. T.; Risaliti, G.; Barret, D.; Brandt, W. N.; Brenneman, L. W.; Kaastra, J. S.; Koss, M.; Lohfink, A. M.; Mushotzky, R. F.; Raymond, John; Stern, D. (2019)
    We present a flux-resolved X-ray analysis of the dwarf Seyfert 1.8 galaxy NGC 4395, based on three archival XMM-Newton and one archival NuSTAR observations. The source is known to harbor a low-mass black hole (~ ...
  • NGC 5548: Lack of a Broad Fe Ka Line and Constraints on the Location of the Hard X-Ray Source 
    Brenneman, L. W.; Elvis, Martin S.; Krongold, Y.; Liu, Y.; Mathur, S. (2012)
    We present an analysis of the co-added and individual 0.7-40 keV spectra from seven Suzaku observations of the Sy 1.5 galaxy NGC 5548 taken over a period of eight weeks. We conclude that the source has a moderately ionized, ...
  • NuSTAR and Suzaku X-Ray Spectroscopy of NGC 4151: Evidence for Reflection from the Inner Accretion Disk 
    Keck, M. L.; Brenneman, L. W.; Ballantyne, D. R.; Bauer, F.; Boggs, S. E.; Christensen, F. E.; Craig, W. W.; Dauser, T.; Elvis, M.; Fabian, A. C.; Fuerst, F.; García, J.; Grefenstette, B. W.; Hailey, C. J.; Harrison, F. A.; Madejski, G.; Marinucci, A.; Matt, G.; Reynolds, C. S.; Stern, D.; Walton, D. J.; Zoghbi, A. (2015)
    We present X-ray timing and spectral analyses of simultaneous 150 ks Nuclear Spectroscopic Telescope Array (NuSTAR) and Suzaku X-ray observations of the Seyfert 1.5 galaxy NGC 4151. We disentangle the continuum emission, ...
  • NuSTAR and XMM-NEWTON Observations of NGC 1365: Extreme Absorption Variability and a Constant Inner Accretion Disk 
    Walton, D. J.; Risaliti, G.; Harrison, F. A.; Fabian, A. C.; Miller, J. M.; Arevalo, P.; Ballantyne, D. R.; Boggs, S. E.; Brenneman, L. W.; Christensen, F. E.; Craig, W. W.; Elvis, M.; Fuerst, F.; Gandhi, P.; Grefenstette, B. W.; Hailey, C. J.; Kara, E.; Luo, B.; Madsen, K. K.; Marinucci, A.; Matt, G.; Parker, M. L.; Reynolds, C. S.; Rivers, E.; Ross, R. R.; Stern, D.; Zhang, W. W. (2014)
    We present a spectral analysis of four coordinated NuSTAR+XMM-Newton observations of the Seyfert galaxy NGC 1365. These exhibit an extreme level of spectral variability, which is primarily due to variable line-of-sight ...
  • NuSTAR Reveals the Comptonizing Corona of the Broad-line Radio Galaxy 3C 382 
    Ballantyne, D. R.; Bollenbacher, J. M.; Brenneman, L. W.; Madsen, K. K.; Balokovic, Mislav; Boggs, S. E.; Christensen, F. E.; Craig, W. W.; Gandhi, P.; Hailey, C. J.; Harrison, F. A.; Lohfink, A. M.; Marinucci, A.; Markwardt, C. B.; Stern, D.; Walton, D. J.; Zhang, W. W. (2014)
    Broad-line radio galaxies (BLRGs) are active galactic nuclei that produce powerful, large-scale radio jets, but appear as Seyfert 1 galaxies in their optical spectra. In the X-ray band, BLRGs also appear like Seyfert ...
  • NuSTAR spectral analysis of two bright Seyfert 1 galaxies: MCG +8-11-11 and NGC 6814 
    Tortosa, A.; Bianchi, S.; Marinucci, A.; Matt, G.; Middei, R.; Piconcelli, E.; Brenneman, L. W.; Cappi, M.; Dadina, M.; De Rosa, A.; Petrucci, P. O.; Ursini, F.; Walton, D. J. (2018)
    We report on the NuSTAR observations of two bright Seyfert 1 galaxies, namely MCG +8-11-11 (100 ks) and NGC 6814 (150 ks). The main goal of these observations was to investigate the Comptonization mechanisms acting in the ...
  • The soft-X-ray emission of Ark 120. XMM-Newton, NuSTAR, and the importance of taking the broad view 
    Matt, G.; Marinucci, A.; Guainazzi, M.; Brenneman, L. W.; Elvis, M.; Lohfink, A.; Arèvalo, P.; Boggs, S. E.; Cappi, M.; Christensen, F. E.; Craig, W. W.; Fabian, A. C.; Fuerst, F.; Hailey, C. J.; Harrison, F. A.; Parker, M.; Reynolds, C. S.; Stern, D.; Walton, D. J.; Zhang, W. W. (2014)
    We present simultaneous XMM-Newton and NuSTAR observations of the `bare' Seyfert 1 galaxy, Ark 120, a system in which ionized absorption is absent. The NuSTAR hard-X-ray spectral coverage allows us to constrain different ...
  • The Spin of the Supermassive Black Hole in NGC 3783 
    Brenneman, L. W.; Reynolds, C. S.; Nowak, M. A.; Reis, R. C.; Trippe, M.; Fabiana, A. C.; Iwasawa, K.; Lee, J. C.; Miller, J. M.; Mushotzky, R. F.; Nandra, K.; Volonteri, M. (2011)
    The Suzaku AGN Spin Survey is designed to determine the supermassive black hole spin in six nearby active galactic nuclei (AGNs) via deep Suzaku stares, thereby giving us our first glimpse of the local black hole spin ...
  • A Suzaku, NuSTAR, and XMM-Newton view on variable absorption and relativistic reflection in NGC 4151 
    Beuchert, T.; Markowitz, A. G.; Dauser, T.; García, J. A.; Keck, M. L.; Wilms, J.; Kadler, M.; Brenneman, L. W.; Zdziarski, A. A. (2017)
    We disentangle X-ray disk reflection from complex line-of-sight absorption in the nearby Seyfert NGC 4151, using a suite of Suzaku, NuSTAR, and XMM-Newton observations. Extending upon earlier published work, we pursue a ...
  • X-Ray Structure between the Innermost Disk and Optical Broad-line Region in NGC 4151 
    Miller, J. M.; Cackett, E.; Zoghbi, A.; Barret, D.; Behar, E.; Brenneman, L. W.; Fabian, A. C.; Kaastra, J. S.; Lohfink, A.; Mushotzky, R. F.; Nandra, K.; Raymond, J. (2018)
    We present an analysis of the narrow Fe Ka line in Chandra/HETGS observations of the Seyfert active galactic nucleus (AGN) NGC 4151. The sensitivity and resolution afforded by the gratings reveal asymmetry in this line. ...

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