AGN STORM 2. III. A NICER View of the Variable X-Ray Obscurer in Mrk 817
The AGN STORM 2 Collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign including Hubble Space Telescope, Swift, XMM-Newton, NICER, and ground-based observatories. Early observations with NICER and XMM revealed an X-ray state 10...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Ethan R. Partington [verfasserIn] Edward M. Cackett [verfasserIn] Erin Kara [verfasserIn] Gerard A. Kriss [verfasserIn] Aaron J. Barth [verfasserIn] Gisella De Rosa [verfasserIn] Y. Homayouni [verfasserIn] Keith Horne [verfasserIn] Hermine Landt [verfasserIn] Abderahmen Zoghbi [verfasserIn] Rick Edelson [verfasserIn] Nahum Arav [verfasserIn] Benjamin D. Boizelle [verfasserIn] Misty C. Bentz [verfasserIn] Michael S. Brotherton [verfasserIn] Doyee Byun [verfasserIn] Elena Dalla Bontà [verfasserIn] Maryam Dehghanian [verfasserIn] Pu Du [verfasserIn] Carina Fian [verfasserIn] Alexei V. Filippenko [verfasserIn] Jonathan Gelbord [verfasserIn] Michael R. Goad [verfasserIn] Diego H. González Buitrago [verfasserIn] Catherine J. Grier [verfasserIn] Patrick B. Hall [verfasserIn] Chen Hu [verfasserIn] Dragana Ilić [verfasserIn] Michael D. Joner [verfasserIn] Shai Kaspi [verfasserIn] Christopher S. Kochanek [verfasserIn] Kirk T. Korista [verfasserIn] Andjelka B. Kovačević [verfasserIn] Daniel Kynoch [verfasserIn] Jacob N. McLane [verfasserIn] Missagh Mehdipour [verfasserIn] Jake A. Miller [verfasserIn] Christos Panagiotou [verfasserIn] Rachel Plesha [verfasserIn] Luka Č. Popović [verfasserIn] Daniel Proga [verfasserIn] Daniele Rogantini [verfasserIn] Thaisa Storchi-Bergmann [verfasserIn] David Sanmartim [verfasserIn] Matthew R. Siebert [verfasserIn] Marianne Vestergaard [verfasserIn] Martin J. Ward [verfasserIn] Tim Waters [verfasserIn] Fatima Zaidouni [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2023 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
In: The Astrophysical Journal - IOP Publishing, 2022, 947(2023), 1, p 2 |
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| Übergeordnetes Werk: |
volume:947 ; year:2023 ; number:1, p 2 |
| Links: |
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| DOI / URN: |
10.3847/1538-4357/acbf44 |
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| Katalog-ID: |
DOAJ088996050 |
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| 245 | 1 | 0 | |a AGN STORM 2. III. A NICER View of the Variable X-Ray Obscurer in Mrk 817 |
| 264 | 1 | |c 2023 | |
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| 520 | |a The AGN STORM 2 Collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign including Hubble Space Telescope, Swift, XMM-Newton, NICER, and ground-based observatories. Early observations with NICER and XMM revealed an X-ray state 10 times fainter than historical observations, consistent with the presence of a new dust-free, ionized obscurer. The following analysis of NICER spectra attributes variability in the observed X-ray flux to changes in both the column density of the obscurer by at least one order of magnitude ( N _H ranges from ${2.85}_{-0.33}^{+0.48}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ to ${25.6}_{-3.5}^{+3.0}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ ) and the intrinsic continuum brightness (the unobscured flux ranges from 10 ^−11.8 to 10 ^−10.5 erg s ^−1 cm ^−2 ). While the X-ray flux generally remains in a faint state, there is one large flare during which Mrk 817 returns to its historical mean flux. The obscuring gas is still present at lower column density during the flare, but it also becomes highly ionized, increasing its transparency. Correlation between the column density of the X-ray obscurer and the strength of UV broad absorption lines suggests that the X-ray and UV continua are both affected by the same obscuration, consistent with a clumpy disk wind launched from the inner broad-line region. | ||
| 650 | 4 | |a Accretion | |
| 650 | 4 | |a X-ray active galactic nuclei | |
| 650 | 4 | |a Black hole physics | |
| 650 | 4 | |a Active galactic nuclei | |
| 653 | 0 | |a Astrophysics | |
| 700 | 0 | |a Edward M. Cackett |e verfasserin |4 aut | |
| 700 | 0 | |a Erin Kara |e verfasserin |4 aut | |
| 700 | 0 | |a Gerard A. Kriss |e verfasserin |4 aut | |
| 700 | 0 | |a Aaron J. Barth |e verfasserin |4 aut | |
| 700 | 0 | |a Gisella De Rosa |e verfasserin |4 aut | |
| 700 | 0 | |a Y. Homayouni |e verfasserin |4 aut | |
| 700 | 0 | |a Keith Horne |e verfasserin |4 aut | |
| 700 | 0 | |a Hermine Landt |e verfasserin |4 aut | |
| 700 | 0 | |a Abderahmen Zoghbi |e verfasserin |4 aut | |
| 700 | 0 | |a Rick Edelson |e verfasserin |4 aut | |
| 700 | 0 | |a Nahum Arav |e verfasserin |4 aut | |
| 700 | 0 | |a Benjamin D. Boizelle |e verfasserin |4 aut | |
| 700 | 0 | |a Misty C. Bentz |e verfasserin |4 aut | |
| 700 | 0 | |a Michael S. Brotherton |e verfasserin |4 aut | |
| 700 | 0 | |a Doyee Byun |e verfasserin |4 aut | |
| 700 | 0 | |a Elena Dalla Bontà |e verfasserin |4 aut | |
| 700 | 0 | |a Maryam Dehghanian |e verfasserin |4 aut | |
| 700 | 0 | |a Pu Du |e verfasserin |4 aut | |
| 700 | 0 | |a Carina Fian |e verfasserin |4 aut | |
| 700 | 0 | |a Alexei V. Filippenko |e verfasserin |4 aut | |
| 700 | 0 | |a Jonathan Gelbord |e verfasserin |4 aut | |
| 700 | 0 | |a Michael R. Goad |e verfasserin |4 aut | |
| 700 | 0 | |a Diego H. González Buitrago |e verfasserin |4 aut | |
| 700 | 0 | |a Catherine J. Grier |e verfasserin |4 aut | |
| 700 | 0 | |a Patrick B. Hall |e verfasserin |4 aut | |
| 700 | 0 | |a Chen Hu |e verfasserin |4 aut | |
| 700 | 0 | |a Dragana Ilić |e verfasserin |4 aut | |
| 700 | 0 | |a Michael D. Joner |e verfasserin |4 aut | |
| 700 | 0 | |a Shai Kaspi |e verfasserin |4 aut | |
| 700 | 0 | |a Christopher S. Kochanek |e verfasserin |4 aut | |
| 700 | 0 | |a Kirk T. Korista |e verfasserin |4 aut | |
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| 700 | 0 | |a Daniel Kynoch |e verfasserin |4 aut | |
| 700 | 0 | |a Jacob N. McLane |e verfasserin |4 aut | |
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| 700 | 0 | |a Christos Panagiotou |e verfasserin |4 aut | |
| 700 | 0 | |a Rachel Plesha |e verfasserin |4 aut | |
| 700 | 0 | |a Luka Č. Popović |e verfasserin |4 aut | |
| 700 | 0 | |a Daniel Proga |e verfasserin |4 aut | |
| 700 | 0 | |a Daniele Rogantini |e verfasserin |4 aut | |
| 700 | 0 | |a Thaisa Storchi-Bergmann |e verfasserin |4 aut | |
| 700 | 0 | |a David Sanmartim |e verfasserin |4 aut | |
| 700 | 0 | |a Matthew R. Siebert |e verfasserin |4 aut | |
| 700 | 0 | |a Marianne Vestergaard |e verfasserin |4 aut | |
| 700 | 0 | |a Martin J. Ward |e verfasserin |4 aut | |
| 700 | 0 | |a Tim Waters |e verfasserin |4 aut | |
| 700 | 0 | |a Fatima Zaidouni |e verfasserin |4 aut | |
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10.3847/1538-4357/acbf44 doi (DE-627)DOAJ088996050 (DE-599)DOAJae6258b3c6084f7ea79c82c6dc1c9d58 DE-627 ger DE-627 rakwb eng QB460-466 Ethan R. Partington verfasserin aut AGN STORM 2. III. A NICER View of the Variable X-Ray Obscurer in Mrk 817 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The AGN STORM 2 Collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign including Hubble Space Telescope, Swift, XMM-Newton, NICER, and ground-based observatories. Early observations with NICER and XMM revealed an X-ray state 10 times fainter than historical observations, consistent with the presence of a new dust-free, ionized obscurer. The following analysis of NICER spectra attributes variability in the observed X-ray flux to changes in both the column density of the obscurer by at least one order of magnitude ( N _H ranges from ${2.85}_{-0.33}^{+0.48}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ to ${25.6}_{-3.5}^{+3.0}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ ) and the intrinsic continuum brightness (the unobscured flux ranges from 10 ^−11.8 to 10 ^−10.5 erg s ^−1 cm ^−2 ). While the X-ray flux generally remains in a faint state, there is one large flare during which Mrk 817 returns to its historical mean flux. The obscuring gas is still present at lower column density during the flare, but it also becomes highly ionized, increasing its transparency. Correlation between the column density of the X-ray obscurer and the strength of UV broad absorption lines suggests that the X-ray and UV continua are both affected by the same obscuration, consistent with a clumpy disk wind launched from the inner broad-line region. Accretion X-ray active galactic nuclei Black hole physics Active galactic nuclei Astrophysics Edward M. Cackett verfasserin aut Erin Kara verfasserin aut Gerard A. Kriss verfasserin aut Aaron J. Barth verfasserin aut Gisella De Rosa verfasserin aut Y. Homayouni verfasserin aut Keith Horne verfasserin aut Hermine Landt verfasserin aut Abderahmen Zoghbi verfasserin aut Rick Edelson verfasserin aut Nahum Arav verfasserin aut Benjamin D. Boizelle verfasserin aut Misty C. Bentz verfasserin aut Michael S. Brotherton verfasserin aut Doyee Byun verfasserin aut Elena Dalla Bontà verfasserin aut Maryam Dehghanian verfasserin aut Pu Du verfasserin aut Carina Fian verfasserin aut Alexei V. Filippenko verfasserin aut Jonathan Gelbord verfasserin aut Michael R. Goad verfasserin aut Diego H. González Buitrago verfasserin aut Catherine J. Grier verfasserin aut Patrick B. Hall verfasserin aut Chen Hu verfasserin aut Dragana Ilić verfasserin aut Michael D. Joner verfasserin aut Shai Kaspi verfasserin aut Christopher S. Kochanek verfasserin aut Kirk T. Korista verfasserin aut Andjelka B. Kovačević verfasserin aut Daniel Kynoch verfasserin aut Jacob N. McLane verfasserin aut Missagh Mehdipour verfasserin aut Jake A. Miller verfasserin aut Christos Panagiotou verfasserin aut Rachel Plesha verfasserin aut Luka Č. Popović verfasserin aut Daniel Proga verfasserin aut Daniele Rogantini verfasserin aut Thaisa Storchi-Bergmann verfasserin aut David Sanmartim verfasserin aut Matthew R. Siebert verfasserin aut Marianne Vestergaard verfasserin aut Martin J. Ward verfasserin aut Tim Waters verfasserin aut Fatima Zaidouni verfasserin aut In The Astrophysical Journal IOP Publishing, 2022 947(2023), 1, p 2 (DE-627)269019219 (DE-600)1473835-1 15384357 nnns volume:947 year:2023 number:1, p 2 https://doi.org/10.3847/1538-4357/acbf44 kostenfrei https://doaj.org/article/ae6258b3c6084f7ea79c82c6dc1c9d58 kostenfrei https://doi.org/10.3847/1538-4357/acbf44 kostenfrei https://doaj.org/toc/1538-4357 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 947 2023 1, p 2 |
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10.3847/1538-4357/acbf44 doi (DE-627)DOAJ088996050 (DE-599)DOAJae6258b3c6084f7ea79c82c6dc1c9d58 DE-627 ger DE-627 rakwb eng QB460-466 Ethan R. Partington verfasserin aut AGN STORM 2. III. A NICER View of the Variable X-Ray Obscurer in Mrk 817 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The AGN STORM 2 Collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign including Hubble Space Telescope, Swift, XMM-Newton, NICER, and ground-based observatories. Early observations with NICER and XMM revealed an X-ray state 10 times fainter than historical observations, consistent with the presence of a new dust-free, ionized obscurer. The following analysis of NICER spectra attributes variability in the observed X-ray flux to changes in both the column density of the obscurer by at least one order of magnitude ( N _H ranges from ${2.85}_{-0.33}^{+0.48}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ to ${25.6}_{-3.5}^{+3.0}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ ) and the intrinsic continuum brightness (the unobscured flux ranges from 10 ^−11.8 to 10 ^−10.5 erg s ^−1 cm ^−2 ). While the X-ray flux generally remains in a faint state, there is one large flare during which Mrk 817 returns to its historical mean flux. The obscuring gas is still present at lower column density during the flare, but it also becomes highly ionized, increasing its transparency. Correlation between the column density of the X-ray obscurer and the strength of UV broad absorption lines suggests that the X-ray and UV continua are both affected by the same obscuration, consistent with a clumpy disk wind launched from the inner broad-line region. Accretion X-ray active galactic nuclei Black hole physics Active galactic nuclei Astrophysics Edward M. Cackett verfasserin aut Erin Kara verfasserin aut Gerard A. Kriss verfasserin aut Aaron J. Barth verfasserin aut Gisella De Rosa verfasserin aut Y. Homayouni verfasserin aut Keith Horne verfasserin aut Hermine Landt verfasserin aut Abderahmen Zoghbi verfasserin aut Rick Edelson verfasserin aut Nahum Arav verfasserin aut Benjamin D. Boizelle verfasserin aut Misty C. Bentz verfasserin aut Michael S. Brotherton verfasserin aut Doyee Byun verfasserin aut Elena Dalla Bontà verfasserin aut Maryam Dehghanian verfasserin aut Pu Du verfasserin aut Carina Fian verfasserin aut Alexei V. Filippenko verfasserin aut Jonathan Gelbord verfasserin aut Michael R. Goad verfasserin aut Diego H. González Buitrago verfasserin aut Catherine J. Grier verfasserin aut Patrick B. Hall verfasserin aut Chen Hu verfasserin aut Dragana Ilić verfasserin aut Michael D. Joner verfasserin aut Shai Kaspi verfasserin aut Christopher S. Kochanek verfasserin aut Kirk T. Korista verfasserin aut Andjelka B. Kovačević verfasserin aut Daniel Kynoch verfasserin aut Jacob N. McLane verfasserin aut Missagh Mehdipour verfasserin aut Jake A. Miller verfasserin aut Christos Panagiotou verfasserin aut Rachel Plesha verfasserin aut Luka Č. Popović verfasserin aut Daniel Proga verfasserin aut Daniele Rogantini verfasserin aut Thaisa Storchi-Bergmann verfasserin aut David Sanmartim verfasserin aut Matthew R. Siebert verfasserin aut Marianne Vestergaard verfasserin aut Martin J. Ward verfasserin aut Tim Waters verfasserin aut Fatima Zaidouni verfasserin aut In The Astrophysical Journal IOP Publishing, 2022 947(2023), 1, p 2 (DE-627)269019219 (DE-600)1473835-1 15384357 nnns volume:947 year:2023 number:1, p 2 https://doi.org/10.3847/1538-4357/acbf44 kostenfrei https://doaj.org/article/ae6258b3c6084f7ea79c82c6dc1c9d58 kostenfrei https://doi.org/10.3847/1538-4357/acbf44 kostenfrei https://doaj.org/toc/1538-4357 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 947 2023 1, p 2 |
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10.3847/1538-4357/acbf44 doi (DE-627)DOAJ088996050 (DE-599)DOAJae6258b3c6084f7ea79c82c6dc1c9d58 DE-627 ger DE-627 rakwb eng QB460-466 Ethan R. Partington verfasserin aut AGN STORM 2. III. A NICER View of the Variable X-Ray Obscurer in Mrk 817 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The AGN STORM 2 Collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign including Hubble Space Telescope, Swift, XMM-Newton, NICER, and ground-based observatories. Early observations with NICER and XMM revealed an X-ray state 10 times fainter than historical observations, consistent with the presence of a new dust-free, ionized obscurer. The following analysis of NICER spectra attributes variability in the observed X-ray flux to changes in both the column density of the obscurer by at least one order of magnitude ( N _H ranges from ${2.85}_{-0.33}^{+0.48}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ to ${25.6}_{-3.5}^{+3.0}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ ) and the intrinsic continuum brightness (the unobscured flux ranges from 10 ^−11.8 to 10 ^−10.5 erg s ^−1 cm ^−2 ). While the X-ray flux generally remains in a faint state, there is one large flare during which Mrk 817 returns to its historical mean flux. The obscuring gas is still present at lower column density during the flare, but it also becomes highly ionized, increasing its transparency. Correlation between the column density of the X-ray obscurer and the strength of UV broad absorption lines suggests that the X-ray and UV continua are both affected by the same obscuration, consistent with a clumpy disk wind launched from the inner broad-line region. Accretion X-ray active galactic nuclei Black hole physics Active galactic nuclei Astrophysics Edward M. Cackett verfasserin aut Erin Kara verfasserin aut Gerard A. Kriss verfasserin aut Aaron J. Barth verfasserin aut Gisella De Rosa verfasserin aut Y. Homayouni verfasserin aut Keith Horne verfasserin aut Hermine Landt verfasserin aut Abderahmen Zoghbi verfasserin aut Rick Edelson verfasserin aut Nahum Arav verfasserin aut Benjamin D. Boizelle verfasserin aut Misty C. Bentz verfasserin aut Michael S. Brotherton verfasserin aut Doyee Byun verfasserin aut Elena Dalla Bontà verfasserin aut Maryam Dehghanian verfasserin aut Pu Du verfasserin aut Carina Fian verfasserin aut Alexei V. Filippenko verfasserin aut Jonathan Gelbord verfasserin aut Michael R. Goad verfasserin aut Diego H. González Buitrago verfasserin aut Catherine J. Grier verfasserin aut Patrick B. Hall verfasserin aut Chen Hu verfasserin aut Dragana Ilić verfasserin aut Michael D. Joner verfasserin aut Shai Kaspi verfasserin aut Christopher S. Kochanek verfasserin aut Kirk T. Korista verfasserin aut Andjelka B. Kovačević verfasserin aut Daniel Kynoch verfasserin aut Jacob N. McLane verfasserin aut Missagh Mehdipour verfasserin aut Jake A. Miller verfasserin aut Christos Panagiotou verfasserin aut Rachel Plesha verfasserin aut Luka Č. Popović verfasserin aut Daniel Proga verfasserin aut Daniele Rogantini verfasserin aut Thaisa Storchi-Bergmann verfasserin aut David Sanmartim verfasserin aut Matthew R. Siebert verfasserin aut Marianne Vestergaard verfasserin aut Martin J. Ward verfasserin aut Tim Waters verfasserin aut Fatima Zaidouni verfasserin aut In The Astrophysical Journal IOP Publishing, 2022 947(2023), 1, p 2 (DE-627)269019219 (DE-600)1473835-1 15384357 nnns volume:947 year:2023 number:1, p 2 https://doi.org/10.3847/1538-4357/acbf44 kostenfrei https://doaj.org/article/ae6258b3c6084f7ea79c82c6dc1c9d58 kostenfrei https://doi.org/10.3847/1538-4357/acbf44 kostenfrei https://doaj.org/toc/1538-4357 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 947 2023 1, p 2 |
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10.3847/1538-4357/acbf44 doi (DE-627)DOAJ088996050 (DE-599)DOAJae6258b3c6084f7ea79c82c6dc1c9d58 DE-627 ger DE-627 rakwb eng QB460-466 Ethan R. Partington verfasserin aut AGN STORM 2. III. A NICER View of the Variable X-Ray Obscurer in Mrk 817 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The AGN STORM 2 Collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign including Hubble Space Telescope, Swift, XMM-Newton, NICER, and ground-based observatories. Early observations with NICER and XMM revealed an X-ray state 10 times fainter than historical observations, consistent with the presence of a new dust-free, ionized obscurer. The following analysis of NICER spectra attributes variability in the observed X-ray flux to changes in both the column density of the obscurer by at least one order of magnitude ( N _H ranges from ${2.85}_{-0.33}^{+0.48}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ to ${25.6}_{-3.5}^{+3.0}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ ) and the intrinsic continuum brightness (the unobscured flux ranges from 10 ^−11.8 to 10 ^−10.5 erg s ^−1 cm ^−2 ). While the X-ray flux generally remains in a faint state, there is one large flare during which Mrk 817 returns to its historical mean flux. The obscuring gas is still present at lower column density during the flare, but it also becomes highly ionized, increasing its transparency. Correlation between the column density of the X-ray obscurer and the strength of UV broad absorption lines suggests that the X-ray and UV continua are both affected by the same obscuration, consistent with a clumpy disk wind launched from the inner broad-line region. Accretion X-ray active galactic nuclei Black hole physics Active galactic nuclei Astrophysics Edward M. Cackett verfasserin aut Erin Kara verfasserin aut Gerard A. Kriss verfasserin aut Aaron J. Barth verfasserin aut Gisella De Rosa verfasserin aut Y. Homayouni verfasserin aut Keith Horne verfasserin aut Hermine Landt verfasserin aut Abderahmen Zoghbi verfasserin aut Rick Edelson verfasserin aut Nahum Arav verfasserin aut Benjamin D. Boizelle verfasserin aut Misty C. Bentz verfasserin aut Michael S. Brotherton verfasserin aut Doyee Byun verfasserin aut Elena Dalla Bontà verfasserin aut Maryam Dehghanian verfasserin aut Pu Du verfasserin aut Carina Fian verfasserin aut Alexei V. Filippenko verfasserin aut Jonathan Gelbord verfasserin aut Michael R. Goad verfasserin aut Diego H. González Buitrago verfasserin aut Catherine J. Grier verfasserin aut Patrick B. Hall verfasserin aut Chen Hu verfasserin aut Dragana Ilić verfasserin aut Michael D. Joner verfasserin aut Shai Kaspi verfasserin aut Christopher S. Kochanek verfasserin aut Kirk T. Korista verfasserin aut Andjelka B. Kovačević verfasserin aut Daniel Kynoch verfasserin aut Jacob N. McLane verfasserin aut Missagh Mehdipour verfasserin aut Jake A. Miller verfasserin aut Christos Panagiotou verfasserin aut Rachel Plesha verfasserin aut Luka Č. Popović verfasserin aut Daniel Proga verfasserin aut Daniele Rogantini verfasserin aut Thaisa Storchi-Bergmann verfasserin aut David Sanmartim verfasserin aut Matthew R. Siebert verfasserin aut Marianne Vestergaard verfasserin aut Martin J. Ward verfasserin aut Tim Waters verfasserin aut Fatima Zaidouni verfasserin aut In The Astrophysical Journal IOP Publishing, 2022 947(2023), 1, p 2 (DE-627)269019219 (DE-600)1473835-1 15384357 nnns volume:947 year:2023 number:1, p 2 https://doi.org/10.3847/1538-4357/acbf44 kostenfrei https://doaj.org/article/ae6258b3c6084f7ea79c82c6dc1c9d58 kostenfrei https://doi.org/10.3847/1538-4357/acbf44 kostenfrei https://doaj.org/toc/1538-4357 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 947 2023 1, p 2 |
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10.3847/1538-4357/acbf44 doi (DE-627)DOAJ088996050 (DE-599)DOAJae6258b3c6084f7ea79c82c6dc1c9d58 DE-627 ger DE-627 rakwb eng QB460-466 Ethan R. Partington verfasserin aut AGN STORM 2. III. A NICER View of the Variable X-Ray Obscurer in Mrk 817 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The AGN STORM 2 Collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign including Hubble Space Telescope, Swift, XMM-Newton, NICER, and ground-based observatories. Early observations with NICER and XMM revealed an X-ray state 10 times fainter than historical observations, consistent with the presence of a new dust-free, ionized obscurer. The following analysis of NICER spectra attributes variability in the observed X-ray flux to changes in both the column density of the obscurer by at least one order of magnitude ( N _H ranges from ${2.85}_{-0.33}^{+0.48}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ to ${25.6}_{-3.5}^{+3.0}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ ) and the intrinsic continuum brightness (the unobscured flux ranges from 10 ^−11.8 to 10 ^−10.5 erg s ^−1 cm ^−2 ). While the X-ray flux generally remains in a faint state, there is one large flare during which Mrk 817 returns to its historical mean flux. The obscuring gas is still present at lower column density during the flare, but it also becomes highly ionized, increasing its transparency. Correlation between the column density of the X-ray obscurer and the strength of UV broad absorption lines suggests that the X-ray and UV continua are both affected by the same obscuration, consistent with a clumpy disk wind launched from the inner broad-line region. Accretion X-ray active galactic nuclei Black hole physics Active galactic nuclei Astrophysics Edward M. Cackett verfasserin aut Erin Kara verfasserin aut Gerard A. Kriss verfasserin aut Aaron J. Barth verfasserin aut Gisella De Rosa verfasserin aut Y. Homayouni verfasserin aut Keith Horne verfasserin aut Hermine Landt verfasserin aut Abderahmen Zoghbi verfasserin aut Rick Edelson verfasserin aut Nahum Arav verfasserin aut Benjamin D. Boizelle verfasserin aut Misty C. Bentz verfasserin aut Michael S. Brotherton verfasserin aut Doyee Byun verfasserin aut Elena Dalla Bontà verfasserin aut Maryam Dehghanian verfasserin aut Pu Du verfasserin aut Carina Fian verfasserin aut Alexei V. Filippenko verfasserin aut Jonathan Gelbord verfasserin aut Michael R. Goad verfasserin aut Diego H. González Buitrago verfasserin aut Catherine J. Grier verfasserin aut Patrick B. Hall verfasserin aut Chen Hu verfasserin aut Dragana Ilić verfasserin aut Michael D. Joner verfasserin aut Shai Kaspi verfasserin aut Christopher S. Kochanek verfasserin aut Kirk T. Korista verfasserin aut Andjelka B. Kovačević verfasserin aut Daniel Kynoch verfasserin aut Jacob N. McLane verfasserin aut Missagh Mehdipour verfasserin aut Jake A. Miller verfasserin aut Christos Panagiotou verfasserin aut Rachel Plesha verfasserin aut Luka Č. Popović verfasserin aut Daniel Proga verfasserin aut Daniele Rogantini verfasserin aut Thaisa Storchi-Bergmann verfasserin aut David Sanmartim verfasserin aut Matthew R. Siebert verfasserin aut Marianne Vestergaard verfasserin aut Martin J. Ward verfasserin aut Tim Waters verfasserin aut Fatima Zaidouni verfasserin aut In The Astrophysical Journal IOP Publishing, 2022 947(2023), 1, p 2 (DE-627)269019219 (DE-600)1473835-1 15384357 nnns volume:947 year:2023 number:1, p 2 https://doi.org/10.3847/1538-4357/acbf44 kostenfrei https://doaj.org/article/ae6258b3c6084f7ea79c82c6dc1c9d58 kostenfrei https://doi.org/10.3847/1538-4357/acbf44 kostenfrei https://doaj.org/toc/1538-4357 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 947 2023 1, p 2 |
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Ethan R. Partington @@aut@@ Edward M. Cackett @@aut@@ Erin Kara @@aut@@ Gerard A. Kriss @@aut@@ Aaron J. Barth @@aut@@ Gisella De Rosa @@aut@@ Y. Homayouni @@aut@@ Keith Horne @@aut@@ Hermine Landt @@aut@@ Abderahmen Zoghbi @@aut@@ Rick Edelson @@aut@@ Nahum Arav @@aut@@ Benjamin D. Boizelle @@aut@@ Misty C. Bentz @@aut@@ Michael S. Brotherton @@aut@@ Doyee Byun @@aut@@ Elena Dalla Bontà @@aut@@ Maryam Dehghanian @@aut@@ Pu Du @@aut@@ Carina Fian @@aut@@ Alexei V. Filippenko @@aut@@ Jonathan Gelbord @@aut@@ Michael R. Goad @@aut@@ Diego H. González Buitrago @@aut@@ Catherine J. Grier @@aut@@ Patrick B. Hall @@aut@@ Chen Hu @@aut@@ Dragana Ilić @@aut@@ Michael D. Joner @@aut@@ Shai Kaspi @@aut@@ Christopher S. Kochanek @@aut@@ Kirk T. Korista @@aut@@ Andjelka B. Kovačević @@aut@@ Daniel Kynoch @@aut@@ Jacob N. McLane @@aut@@ Missagh Mehdipour @@aut@@ Jake A. Miller @@aut@@ Christos Panagiotou @@aut@@ Rachel Plesha @@aut@@ Luka Č. Popović @@aut@@ Daniel Proga @@aut@@ Daniele Rogantini @@aut@@ Thaisa Storchi-Bergmann @@aut@@ David Sanmartim @@aut@@ Matthew R. Siebert @@aut@@ Marianne Vestergaard @@aut@@ Martin J. Ward @@aut@@ Tim Waters @@aut@@ Fatima Zaidouni @@aut@@ |
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A NICER View of the Variable X-Ray Obscurer in Mrk 817</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2023</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">The AGN STORM 2 Collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign including Hubble Space Telescope, Swift, XMM-Newton, NICER, and ground-based observatories. Early observations with NICER and XMM revealed an X-ray state 10 times fainter than historical observations, consistent with the presence of a new dust-free, ionized obscurer. The following analysis of NICER spectra attributes variability in the observed X-ray flux to changes in both the column density of the obscurer by at least one order of magnitude ( N _H ranges from ${2.85}_{-0.33}^{+0.48}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ to ${25.6}_{-3.5}^{+3.0}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ ) and the intrinsic continuum brightness (the unobscured flux ranges from 10 ^−11.8 to 10 ^−10.5 erg s ^−1 cm ^−2 ). While the X-ray flux generally remains in a faint state, there is one large flare during which Mrk 817 returns to its historical mean flux. The obscuring gas is still present at lower column density during the flare, but it also becomes highly ionized, increasing its transparency. 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Ethan R. Partington misc QB460-466 misc Accretion misc X-ray active galactic nuclei misc Black hole physics misc Active galactic nuclei misc Astrophysics AGN STORM 2. III. A NICER View of the Variable X-Ray Obscurer in Mrk 817 |
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agn storm 2. iii. a nicer view of the variable x-ray obscurer in mrk 817 |
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AGN STORM 2. III. A NICER View of the Variable X-Ray Obscurer in Mrk 817 |
| abstract |
The AGN STORM 2 Collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign including Hubble Space Telescope, Swift, XMM-Newton, NICER, and ground-based observatories. Early observations with NICER and XMM revealed an X-ray state 10 times fainter than historical observations, consistent with the presence of a new dust-free, ionized obscurer. The following analysis of NICER spectra attributes variability in the observed X-ray flux to changes in both the column density of the obscurer by at least one order of magnitude ( N _H ranges from ${2.85}_{-0.33}^{+0.48}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ to ${25.6}_{-3.5}^{+3.0}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ ) and the intrinsic continuum brightness (the unobscured flux ranges from 10 ^−11.8 to 10 ^−10.5 erg s ^−1 cm ^−2 ). While the X-ray flux generally remains in a faint state, there is one large flare during which Mrk 817 returns to its historical mean flux. The obscuring gas is still present at lower column density during the flare, but it also becomes highly ionized, increasing its transparency. Correlation between the column density of the X-ray obscurer and the strength of UV broad absorption lines suggests that the X-ray and UV continua are both affected by the same obscuration, consistent with a clumpy disk wind launched from the inner broad-line region. |
| abstractGer |
The AGN STORM 2 Collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign including Hubble Space Telescope, Swift, XMM-Newton, NICER, and ground-based observatories. Early observations with NICER and XMM revealed an X-ray state 10 times fainter than historical observations, consistent with the presence of a new dust-free, ionized obscurer. The following analysis of NICER spectra attributes variability in the observed X-ray flux to changes in both the column density of the obscurer by at least one order of magnitude ( N _H ranges from ${2.85}_{-0.33}^{+0.48}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ to ${25.6}_{-3.5}^{+3.0}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ ) and the intrinsic continuum brightness (the unobscured flux ranges from 10 ^−11.8 to 10 ^−10.5 erg s ^−1 cm ^−2 ). While the X-ray flux generally remains in a faint state, there is one large flare during which Mrk 817 returns to its historical mean flux. The obscuring gas is still present at lower column density during the flare, but it also becomes highly ionized, increasing its transparency. Correlation between the column density of the X-ray obscurer and the strength of UV broad absorption lines suggests that the X-ray and UV continua are both affected by the same obscuration, consistent with a clumpy disk wind launched from the inner broad-line region. |
| abstract_unstemmed |
The AGN STORM 2 Collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign including Hubble Space Telescope, Swift, XMM-Newton, NICER, and ground-based observatories. Early observations with NICER and XMM revealed an X-ray state 10 times fainter than historical observations, consistent with the presence of a new dust-free, ionized obscurer. The following analysis of NICER spectra attributes variability in the observed X-ray flux to changes in both the column density of the obscurer by at least one order of magnitude ( N _H ranges from ${2.85}_{-0.33}^{+0.48}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ to ${25.6}_{-3.5}^{+3.0}\times {10}^{22}\,{\mathrm{cm}}^{-2}$ ) and the intrinsic continuum brightness (the unobscured flux ranges from 10 ^−11.8 to 10 ^−10.5 erg s ^−1 cm ^−2 ). While the X-ray flux generally remains in a faint state, there is one large flare during which Mrk 817 returns to its historical mean flux. The obscuring gas is still present at lower column density during the flare, but it also becomes highly ionized, increasing its transparency. Correlation between the column density of the X-ray obscurer and the strength of UV broad absorption lines suggests that the X-ray and UV continua are both affected by the same obscuration, consistent with a clumpy disk wind launched from the inner broad-line region. |
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AGN STORM 2. III. A NICER View of the Variable X-Ray Obscurer in Mrk 817 |
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https://doi.org/10.3847/1538-4357/acbf44 https://doaj.org/article/ae6258b3c6084f7ea79c82c6dc1c9d58 https://doaj.org/toc/1538-4357 |
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Edward M. Cackett Erin Kara Gerard A. Kriss Aaron J. Barth Gisella De Rosa Y. Homayouni Keith Horne Hermine Landt Abderahmen Zoghbi Rick Edelson Nahum Arav Benjamin D. Boizelle Misty C. Bentz Michael S. Brotherton Doyee Byun Elena Dalla Bontà Maryam Dehghanian Pu Du Carina Fian Alexei V. Filippenko Jonathan Gelbord Michael R. Goad Diego H. González Buitrago Catherine J. Grier Patrick B. Hall Chen Hu Dragana Ilić Michael D. Joner Shai Kaspi Christopher S. Kochanek Kirk T. Korista Andjelka B. Kovačević Daniel Kynoch Jacob N. McLane Missagh Mehdipour Jake A. Miller Christos Panagiotou Rachel Plesha Luka Č. Popović Daniel Proga Daniele Rogantini Thaisa Storchi-Bergmann David Sanmartim Matthew R. Siebert Marianne Vestergaard Martin J. Ward Tim Waters Fatima Zaidouni |
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Edward M. Cackett Erin Kara Gerard A. Kriss Aaron J. Barth Gisella De Rosa Y. Homayouni Keith Horne Hermine Landt Abderahmen Zoghbi Rick Edelson Nahum Arav Benjamin D. Boizelle Misty C. Bentz Michael S. Brotherton Doyee Byun Elena Dalla Bontà Maryam Dehghanian Pu Du Carina Fian Alexei V. Filippenko Jonathan Gelbord Michael R. Goad Diego H. González Buitrago Catherine J. Grier Patrick B. Hall Chen Hu Dragana Ilić Michael D. Joner Shai Kaspi Christopher S. Kochanek Kirk T. Korista Andjelka B. Kovačević Daniel Kynoch Jacob N. McLane Missagh Mehdipour Jake A. Miller Christos Panagiotou Rachel Plesha Luka Č. Popović Daniel Proga Daniele Rogantini Thaisa Storchi-Bergmann David Sanmartim Matthew R. Siebert Marianne Vestergaard Martin J. Ward Tim Waters Fatima Zaidouni |
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