Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Gerard A. Kriss"'
Publikováno v:
Astronomy and Astrophysics, 653
Astronomy & Astrophysics, 653:A125. EDP Sciences
Astronomy & Astrophysics, 653:A125. EDP Sciences
(Abridged) NGC 985 was observed by XMM-Newton twice in 2015, revealing that the source was coming out from a soft X-ray obscuration event that took place in 2013. These kinds of events are possibly recurrent since a previous XMM-Newton archival obser
Autor:
B. De Marco, Shai Kaspi, Y. Wang, Gabriele Ponti, P.-O. Petrucci, Dominic J. Walton, Gerard A. Kriss, Nahum Arav, Ciro Pinto, Junjie Mao, Francesco Ursini, S. Grafton-Waters, Elisa Costantini, Graziella Branduardi-Raymont, Jelle Kaastra, Jacobo Ebrero, Stéphane Paltani, Giorgio Matt, Simone Bianchi, M. Mehdipour, Ehud Behar, L. Di Gesu, Michael S. Brotherton, Massimo Cappi
Publikováno v:
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Astronomy and Astrophysics, 652
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 652, pp.A150. ⟨10.1051/0004-6361/202141324⟩
Universitat Politècnica de Catalunya (UPC)
Astronomy and Astrophysics, 652
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 652, pp.A150. ⟨10.1051/0004-6361/202141324⟩
From Swift monitoring of a sample of active galactic nuclei (AGN) we found a transient X-ray obscuration event in Seyfert-1 galaxy NGC 3227, and thus triggered our joint XMM-Newton, NuSTAR, and Hubble Space Telescope (HST) observations to study this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce35e26f4d1b60fc0e78a4ef6d92efb0
Autor:
Jin-Ming Bai, Luka Č. Popović, Ian M. M. cHardy, Doyee Byun, Z. G. Yao, Kirk T. Korista, Aaron J. Barth, M. Mehdipour, Michael D. Joner, Encarni Romero Colmenero, Daniel Kynoch, Ying Zu, Laura Ferrarese, Catherine J. Grier, Juan V. Hernandez Santisteban, J. N. McLane, Erika Strasburger, Wei-Jian Guo, D. Chelouche, Travis Fischer, Michael S. Brotherton, Shai Kaspi, Yan-Rong Li, Tim Waters, D. Ilic, Theodora E. Zastrocky, Richard W. Pogge, Diego H. Gonzalez Buitrago, John Montano, Gerard A. Kriss, T. G. Brink, Jun-Rong Liu, Elena Dalla Bontà, Alexei V. Filippenko, Jake Miller, Erin Kara, Hagai Netzer, Sha-Sha Li, Chen Hu, Dong-Wei Bao, J. M. Gelbord, Jian-Min Wang, M. Dehghanian, Shuo Zhai, Marianne Vestergaard, Patrick B. Hall, Tommaso Treu, Michael R. Goad, Jelle Kaastra, Misty C. Bentz, Daniel Proga, Thaisa Storchi-Bergmann, Hermine Landt, Gary J. Ferland, Ethan Partington, Luis C. Ho, Gisella De Rosa, Yi Chen, Peter R. Williams, Rick Edelson, Pu Du, Jake A. J. Mitchell, Jesús Aceituno, Y. Homayouni, Keith Horne, Varoujan Gorjian, Sen Yang, Edward M. Cackett, Nahum Arav, Bo-Wei Jiang, K. A. Olson, Carina Fian, Martin Ward, Christopher S. Kochanek
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
The Astrophysical Journal, 2021, Vol.922(2), pp.151 [Peer Reviewed Journal]
The Astrophysical Journal, 922(2)
instname
The Astrophysical Journal, 2021, Vol.922(2), pp.151 [Peer Reviewed Journal]
The Astrophysical Journal, 922(2)
Full list of authors: Kara, Erin; Mehdipour, Missagh; Kriss, Gerard A.; Cackett, Edward M.; Arav, Nahum; Barth, Aaron J.; Byun, Doyee; Brotherton, Michael S.; De Rosa, Gisella; Gelbord, Jonathan; Hernández Santisteban, Juan V.; Hu, Chen; Kaastra, Je
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2611033a10f52dbaeba5932d991f84f8
https://hdl.handle.net/1887/3250965
https://hdl.handle.net/1887/3250965
Autor:
J. M. Gelbord, Bradley M. Peterson, Marianne Vestergaard, E. Dalla Bontà, M. Dehghanian, G. De Rosa, Missagh Mehdipour, Gary J. Ferland, Smita Mathur, Jelle Kaastra, Misty C. Bentz, I. M. McHardy, Marios Chatzikos, Kirk T. Korista, Gerard A. Kriss, Daniel Proga, M. R. Goad, D. A. Starkey, Tim Waters, R. W. Pogge, Michael Fausnaugh, F. Guzmán, Susanna Bisogni, Keith Horne, W. N. Brandt
Publikováno v:
The Astrophysical Journal, 898(2), 141
Dehghanian, M, Ferland, G J, Kriss, G A, Peterson, B M, Korista, K T, Goad, M R, Chatzikos, M, Guzman, F, de Rosa, G, Mehdipour, M, Kaastra, J, Mathur, S, Vestergaard, M, Proga, D, Waters, T, Bentz, M C, Bisogni, S, Brandt, W N, Dalla Bonta, E, Fausnaugh, M M, Gelbord, J M, Horne, K, McHardy, I M, Pogge, R W & Starkey, D A 2020, ' Space Telescope and Optical Reverberation Mapping Project. XI. Disk-wind Characteristics and Contributions to the Very Broad Emission Lines of NGC 5548 ', Astrophysical Journal, vol. 898, no. 2, 141 . https://doi.org/10.3847/1538-4357/ab9cb2
Dehghanian, M, Ferland, G J, Kriss, G A, Peterson, B M, Korista, K T, Goad, M R, Chatzikos, M, Guzman, F, de Rosa, G, Mehdipour, M, Kaastra, J, Mathur, S, Vestergaard, M, Proga, D, Waters, T, Bentz, M C, Bisogni, S, Brandt, W N, Dalla Bonta, E, Fausnaugh, M M, Gelbord, J M, Horne, K, McHardy, I M, Pogge, R W & Starkey, D A 2020, ' Space Telescope and Optical Reverberation Mapping Project. XI. Disk-wind Characteristics and Contributions to the Very Broad Emission Lines of NGC 5548 ', Astrophysical Journal, vol. 898, no. 2, 141 . https://doi.org/10.3847/1538-4357/ab9cb2
In 2014 the NGC 5548 Space Telescope and Optical Reverberation Mapping campaign discovered a two-month anomaly when variations in the absorption and emission lines decorrelated from continuum variations. During this time the soft X-ray part of the in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d80811706c461a53a3c1d3f381c1702d
https://hdl.handle.net/1887/3134300
https://hdl.handle.net/1887/3134300
Autor:
Andrew J. King, K. G. Teems, Gabriele Ponti, J. S. Schimoia, Calen B. Henderson, Michael S. Brotherton, S. Paltani, Nahum Arav, Alessandro Siviero, Radosław Poleski, P. Lira, Sang Chul Kim, Thomas W.-S. Holoien, Wei Zhu, A. de Lorenzo-Cáceres, M. C. Bottorff, Dirk Grupe, Gabriela Canalizo, M. Eracleous, S. G. Sergeev, F. MacInnis, Massimo Cappi, M. Dietrich, Alis J. Deason, Haojing Yan, Giorgio Matt, Ciro Pinto, Michael T. Carini, Minjin Kim, Brandon C. Kelly, I. M. McHardy, Scott M. Adams, L. Gonzalez, J. J. Jensen, Julia M. Comerford, Yair Krongold, Tim Waters, B. Scott, C. S. Turner, G. A. Borman, R. McGurk, Nicolas Tejos, J. R. Parks, K. Flatland, Michael D. Joner, Kirk T. Korista, L. Di Gesu, Emma Gardner, Jon C. Mauerhan, Jessie C. Runnoe, Douglas C. Leonard, Kelsey I. Clubb, M. H. Siegel, C. A. Johnson, D. A. Starkey, H. Yuk, M. A. Malkan, Justin Ely, Ying Zu, Aaron J. Barth, Cassandra Lochhaas, Patrick L. Kelly, E. Holmbeck, Hyun-Il Sung, Patrick B. Hall, C. Montuori, Christopher S. Kochanek, Bradley M. Peterson, Tommaso Treu, Missagh Mehdipour, Marie Wingyee Lau, A. Skielboe, Catherine J. Grier, J. A. Kennea, Thomas G. Beatty, R. W. Pogge, J. van Saders, A. Bigley, S. Hicks, Catia Silva, H. W. Rix, Vardha N. Bennert, D. M. Crenshaw, E. Dalla Bontà, Miao Li, A. A. Breeveld, Dom Walton, D. N. Okhmat, Elisa Costantini, P. Ochner, Y. Weiss, M. L. Nguyen, Ryan Norris, Susanna Bisogni, Ehud Behar, Jacobo Ebrero, Garrett Somers, Phil Uttley, S. Rafter, Kelly D. Denney, K. Schnülle, Carolin Villforth, Keith Horne, Smita Mathur, G. V. Simonian, R. Boissay-Malaquin, Gary J. Ferland, J. S. Brown, Jelle Kaastra, Ana M. Mosquera, Stefano Bianchi, Misty C. Bentz, A. Pancoast, Alessandro Pizzella, WeiKang Zheng, N. Gehrels, Daniel J. Stevens, M. Dehghanian, Kevin V. Croxall, Isaac Shivvers, A. Gupta, Chris Done, J. E. Brown, B. De Marco, Gerard A. Kriss, Steve Croft, S. V. Nazarov, J. A. Nousek, Jae-Ok Lee, P. Arévalo, G. De Rosa, Michael Fausnaugh, Rick Edelson, Phil Evans, Lorenzo Morelli, S. Geier, Enrico Maria Corsini, M. R. Goad, V. Gorjian, W. N. Brandt, Elinor L. Gates, Shai Kaspi, D. A. Saylor, Jong-Hak Woo, Edward M. Cackett, Liuyi Pei, T. Hutchison, Jamie Tayar, E. R. Manne-Nicholas, Laura Vican, Daniel Proga, Steven Villanueva, D. Mudd, J.-U. Pott, F. Müller-Sánchez, Alexei V. Filippenko, Hagai Netzer, S. A. Klimanov, B. J. Shappee, J. M. Gelbord, Marianne Vestergaard, M. Spencer, Zhiyuan Ma, Carl T. Coker, S. Y. Kim, Myungshin Im
Publikováno v:
Astrophysical Journal, 881(2):153. IOP Publishing Ltd.
Astrophysical Journal (0004-637X)
The astrophysical journal, 2019, Vol.881(2), pp.153 [Peer Reviewed Journal]
Kriss, G A, De Rosa, G, Ely, J, Peterson, B M, Kaastra, J, Mehdipour, M, Ferland, G J, Dehghanian, M, Mathur, S, Edelson, R, Arav, N, Barth, A J, Bentz, M C, Brandt, W N, Crenshaw, D M, Dalla Bonta, E, Denney, K D, Done, C, Vestergaard, M, Adams, S M, Anderson, M D, Cackett, E M, Canalizo, G, Cappi, M, Carini, M T, Clubb, K I, Comerford, J M, Coker, C T, Corsini, E M, Costantini, E, Croft, S, Croxall, K V, Deason, A J, Gorjian, V, Grupe, D, Gupta, A, Hall, P B, Henderson, C B, Hicks, S, Holmbeck, E, Holoien, T W-S, Hutchison, T A, Im, M, Jensen, J J, Johnson, C A, Joner, M D, Kaspi, S, Kelly, B C, Kelly, P L, Kennea, J A, Kim, M, Kim, S C, Kim, S Y, King, A, Klimanov, S A, Krongold, Y, Runnoe, J, Saylor, D A, Schimoia, J S, Schnuelle, K, Skielboe, A, Somers, G, Spencer, M, Starkey, D, Stevens, D J, Villanueva, S J & Walton, D J 2019, ' Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum ', Astrophysical Journal, vol. 881, no. 2, 153 . https://doi.org/10.3847/1538-4357/ab3049
The Astrophysical Journal
Astrophysical Journal (0004-637X), 881(2), 153
Astrophysical Journal (0004-637X)
The astrophysical journal, 2019, Vol.881(2), pp.153 [Peer Reviewed Journal]
Kriss, G A, De Rosa, G, Ely, J, Peterson, B M, Kaastra, J, Mehdipour, M, Ferland, G J, Dehghanian, M, Mathur, S, Edelson, R, Arav, N, Barth, A J, Bentz, M C, Brandt, W N, Crenshaw, D M, Dalla Bonta, E, Denney, K D, Done, C, Vestergaard, M, Adams, S M, Anderson, M D, Cackett, E M, Canalizo, G, Cappi, M, Carini, M T, Clubb, K I, Comerford, J M, Coker, C T, Corsini, E M, Costantini, E, Croft, S, Croxall, K V, Deason, A J, Gorjian, V, Grupe, D, Gupta, A, Hall, P B, Henderson, C B, Hicks, S, Holmbeck, E, Holoien, T W-S, Hutchison, T A, Im, M, Jensen, J J, Johnson, C A, Joner, M D, Kaspi, S, Kelly, B C, Kelly, P L, Kennea, J A, Kim, M, Kim, S C, Kim, S Y, King, A, Klimanov, S A, Krongold, Y, Runnoe, J, Saylor, D A, Schimoia, J S, Schnuelle, K, Skielboe, A, Somers, G, Spencer, M, Starkey, D, Stevens, D J, Villanueva, S J & Walton, D J 2019, ' Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum ', Astrophysical Journal, vol. 881, no. 2, 153 . https://doi.org/10.3847/1538-4357/ab3049
The Astrophysical Journal
Astrophysical Journal (0004-637X), 881(2), 153
We model the ultraviolet spectra of the Seyfert 1 galaxy NGC~5548 obtained with the Hubble Space Telescope during the 6-month reverberation-mapping campaign in 2014. Our model of the emission from NGC 5548 corrects for overlying absorption and deblen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e519db3132928f8de00bde9d5d2f407f
https://resolver.caltech.edu/CaltechAUTHORS:20190814-074022037
https://resolver.caltech.edu/CaltechAUTHORS:20190814-074022037
Autor:
Michael Fausnaugh, K. T. Korista, I. M. Mc Hardy, Bradley M. Peterson, E. Dalla Bontà, P. A. M. van Hoof, D. A. Starkey, R. Williams, Gerard A. Kriss, M. Dehghanian, M. R. Goad, Jelle Kaastra, Misty C. Bentz, R. W. Pogge, N. Arav, G. De Rosa, Marios Chatzikos, Gary J. Ferland, Christian Knigge, W. N. Brandt, J. M. Gelbord, Susanna Bisogni, Anchal Gupta, Keith Horne, Marianne Vestergaard, Aaron J. Barth, F. Guzmán, D. M. Crenshaw, M. Mehdipour, S. Mathur
Publikováno v:
Dehghanian, M, Ferland, G J, Kriss, G A, Peterson, B M, Mathur, S, Mehdipour, M, Guzmán, F, Chatzikos, M, Van Hoof, P A M, Williams, R J R, Arav, N, Barth, A J, Bentz, M C, Bisogni, S, Brandt, W N, Crenshaw, D M, Bonta, E D, De Rosa, G, Fausnaugh, M M, Gelbord, J M, Goad, M R, Gupta, A, Horne, K, Kaastra, J, Knigge, C, Korista, K T, McHardy, I M, Pogge, R W, Starkey, D A & Vestergaard, M 2019, ' Space Telescope and Optical Reverberation Mapping Project. X. Understanding the Absorption-line Holiday in NGC 5548 ', Astrophysical Journal, vol. 877, no. 2, 119 . https://doi.org/10.3847/1538-4357/ab1b48
The flux variations in the emission lines in active galactic nuclei (AGNs) are driven by variations in the ionizing continuum flux --which are usually reflected in the observable UV-optical continuum. The "Reverberation mapping" technique measures th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe31015f75ecc10de2b6a5f2e680800b
https://eprints.soton.ac.uk/427238/
https://eprints.soton.ac.uk/427238/
Autor:
Anil K. Pradhan, Karla Z. Arellano-Cordova, Stefanie Komossa, Gerard A. Kriss, Luigi C. Gallo, Michael Parker, Dan R. Wilkins, Smita Mathur, Yair Krongold, Dirk Grupe, Anna Lia Longinotti
The Seyfert Galaxy Mrk 335 is known for its frequent changes of flux and spectral shape in the X-ray band occurred during recent years. These variations may be explained by the onset of a wind that previous, non-contemporaneous high-resolution spectr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a3eae6d6f01fa734ebce6ac937f21f44
Autor:
Nahum Arav, Pierre-Olivier Petrucci, L. Di Gesu, Ehud Behar, Jelle Kaastra, Dominic J. Walton, Gerard A. Kriss, Ciro Pinto, R. Middei, Jacobo Ebrero, Agata Różańska, Simone Bianchi, Massimo Cappi, Junjie Mao, D. Costanzo, Giorgio Matt, Shai Kaspi, Stéphane Paltani, Alex Markowitz, B. De Marco, T. P. Adhikari, M. Mehdipour, Gabriele Ponti, Elisa Costantini, Graziella Branduardi-Raymont
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, In press
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 634, pp.A65. ⟨10.1051/0004-6361/201936470⟩
Astron.Astrophys.
Astron.Astrophys., 2020, 634, pp.A65. ⟨10.1051/0004-6361/201936470⟩
Astronomy & Astrophysics, 634, A65
Astronomy and Astrophysics-A&A, EDP Sciences, In press
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 634, pp.A65. ⟨10.1051/0004-6361/201936470⟩
Astron.Astrophys.
Astron.Astrophys., 2020, 634, pp.A65. ⟨10.1051/0004-6361/201936470⟩
Astronomy & Astrophysics, 634, A65
Context. Obscuration events caused by outflowing clumps or streams of high column density, low ionisation gas, heavily absorbing the X-ray continuum, have been witnessed in a number of Seyfert galaxies. Aims. We report on the X-ray spectral-timing an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4423b107d9d09120efb23c9d031dcd5
https://hal.archives-ouvertes.fr/hal-02392286
https://hal.archives-ouvertes.fr/hal-02392286
Autor:
B. De Marco, L. Di Gesu, U. Peretz, Jelle Kaastra, Ciro Pinto, Ehud Behar, R. Middei, Junjie Mao, Elisa Costantini, Gerard A. Kriss, Simone Bianchi, Nahum Arav, Graziella Branduardi-Raymont, P.-O. Petrucci, Jacobo Ebrero, Gabriele Ponti, M. Mehdipour
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2019, 621, pp.A99. ⟨10.1051/0004-6361/201833191⟩
Astron.Astrophys.
Astron.Astrophys., 2019, 621, pp.A99. ⟨10.1051/0004-6361/201833191⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2019, 621, pp.A99. ⟨10.1051/0004-6361/201833191⟩
Astron.Astrophys.
Astron.Astrophys., 2019, 621, pp.A99. ⟨10.1051/0004-6361/201833191⟩
Our Swift monitoring program triggered two joint XMM-Newton, NuSTAR and HST observations on 11 and 21 December 2016 targeting NGC 3783, as its soft X-ray continuum was heavily obscured. Consequently, emission features, including the O VII radiative r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f94a4a9580a79b3613f35557ac9d8b1
https://hdl.handle.net/11590/350124
https://hdl.handle.net/11590/350124
Autor:
B. M. Peterson, Katrien C. Steenbrugge, Jacobo Ebrero, Elisa Costantini, Francesco Ursini, Graziella Branduardi-Raymont, Gerard A. Kriss, P.-O. Petrucci, Gabriele Ponti, M. Mehdipour, Giorgio Matt, B. De Marco, Stéphane Paltani, Massimo Cappi, Jelle Kaastra, L. Di Gesu, Stefano Bianchi, Ehud Behar, M. Whewell
Publikováno v:
Astronomy & Astrophysics (0004-6361)
Astronomy & Astrophysics (0004-6361), 588, A139
Astronomy & Astrophysics (0004-6361), 588, A139
We present our investigation into the long-term variability of the X-ray obscuration and optical-UV-X-ray continuum in the Seyfert 1 galaxy NGC 5548. In 2013 and 2014, the Swift observatory monitored NGC 5548 on average every day or two, with archiva
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0eabb2777f652d65df37e9d7e90cdc22
https://hdl.handle.net/1887/47822
https://hdl.handle.net/1887/47822