Standard
Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548. / Horne, Keith; Rosa, G. De; Peterson, B. M.; Barth, A. J.; Ely, J.; Fausnaugh, M. M.; Kriss, G. A.; Pei, L.; Bentz, M. C.; Cackett, E. M.; Edelson, R.; Eracleous, M.; Goad, M. R.; Grier, C. J.; Kaastra, J.; Kochanek, C. S.; Krongold, Y.; Mathur, S.; Netzer, H.; Proga, D.; Tejos, N.; Vestergaard, M.; Villforth, C.; Adams, S. M.; Anderson, M. D.; Arevalo, P.; Beatty, T. G.; Bennert, V. N.; Bigley, A.; Bisogni, S.; Borman, G. A.; Boroson, T. A.; Bottorff, M. C.; Brandt, W. N.; Breeveld, A. A.; Brotherton, M.; Brown, J. E.; Brown, J. S.; Canalizo, G.; Carini, M. T.; Clubb, K. I.; Comerford, J. M.; Corsini, E. M.; Crenshaw, D. M.; Croft, S.; Croxall, K. V.; Bonta, E. Dalla; Deason, A. J.; Dehghanian, M.; Lorenzo-Caceres, A. De; Denney, K. D.; Dietrich, M.; Done, C.; Efimova, N. V.; Evans, P. A.; Ferland, G. J.; Filippenko, A. V.; Flatland, K.; Fox, O. D.; Gardner, E.; Gates, E. L.; Gehrels, N.; Geier, S.; Gelbord, J. M.; Gonzalez, L.; Gorjian, V.; Greene, J. E.; Grupe, D.; Gupta, A.; Hall, P. B.; Henderson, C. B.; Hicks, S.; Holmbeck, E.; Holoien, T. W. -S.; Hutchison, T.; Im, M.; Jensen, J. J.; Johnson, C. A.; Joner, M. D.; Jones, J.; Kaspi, S.; Kelly, P. L.; Kennea, J. A.; Kim, M.; Kim, S.; Kim, S. C.; King, A.; Klimanov, S. A.; Korista, K. T.; Lau, M. W.; Lee, J. C.; Leonard, D. C.; Li, Miao; Lira, P.; Lochhaas, C.; Ma, Zhiyuan; MacInnis, F.; Malkan, M. A.; Manne-Nicholas, E. R.; Mauerhan, J. C.; McGurk, R.; McHardy, I. M.; Montuori, C.; Morelli, L.; Mosquera, A.; Mudd, D.; Muller-Sanchez, F.; Nazarov, S. V.; Norris, R. P.; Nousek, J. A.; Nguyen, M. L.; Ochner, P.; Okhmat, D. N.; Pancoast, A.; Papadakis, I.; Parks, J. R.; Penny, M. T.; Pizzella, A.; Pogge, R. W.; Poleski, R.; Pott, J. -U.; Rafter, S. E.; Rix, H. -W.; Runnoe, J.; Saylor, D. A.; Schimoia, J. S.; Schnuelle, K.; Scott, B.; Sergeev, S. G.; Shappee, B. J.; Shivvers, I.; Siegel, M.; Simonian, G. V.; Siviero, A.; Skielboe, A.; Somers, G.; Spencer, M.; Starkey, D.; Stevens, D. J.; Sung, H. -I.; Tayar, J.; Treu, T.; Turner, C. S.; Uttley, P.; Van Saders, J.; Vican, L.; Villanueva, S.; Weiss, Y.; Woo, J. -H.; Yan, H.; Young, S.; Yuk, H.; Zheng, W.; Zhu, W.; Zu, Y.
In:
Astrophysical Journal, Vol. 907, No. 2, 76, 02.2021.
Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
Horne, K, Rosa, GD, Peterson, BM, Barth, AJ, Ely, J, Fausnaugh, MM, Kriss, GA, Pei, L, Bentz, MC, Cackett, EM, Edelson, R, Eracleous, M, Goad, MR, Grier, CJ, Kaastra, J, Kochanek, CS, Krongold, Y, Mathur, S, Netzer, H, Proga, D, Tejos, N
, Vestergaard, M, Villforth, C, Adams, SM, Anderson, MD, Arevalo, P, Beatty, TG, Bennert, VN, Bigley, A, Bisogni, S, Borman, GA, Boroson, TA, Bottorff, MC, Brandt, WN, Breeveld, AA, Brotherton, M, Brown, JE, Brown, JS, Canalizo, G, Carini, MT, Clubb, KI, Comerford, JM, Corsini, EM, Crenshaw, DM, Croft, S, Croxall, KV, Bonta, ED, Deason, AJ, Dehghanian, M, Lorenzo-Caceres, AD, Denney, KD, Dietrich, M, Done, C, Efimova, NV, Evans, PA, Ferland, GJ, Filippenko, AV, Flatland, K, Fox, OD, Gardner, E, Gates, EL, Gehrels, N, Geier, S, Gelbord, JM, Gonzalez, L, Gorjian, V, Greene, JE, Grupe, D, Gupta, A, Hall, PB, Henderson, CB, Hicks, S, Holmbeck, E, Holoien, TW-S, Hutchison, T, Im, M, Jensen, JJ, Johnson, CA, Joner, MD, Jones, J, Kaspi, S, Kelly, PL, Kennea, JA, Kim, M, Kim, S, Kim, SC, King, A, Klimanov, SA, Korista, KT, Lau, MW, Lee, JC, Leonard, DC, Li, M, Lira, P, Lochhaas, C, Ma, Z, MacInnis, F, Malkan, MA, Manne-Nicholas, ER, Mauerhan, JC, McGurk, R, McHardy, IM, Montuori, C, Morelli, L, Mosquera, A, Mudd, D, Muller-Sanchez, F, Nazarov, SV, Norris, RP, Nousek, JA, Nguyen, ML, Ochner, P, Okhmat, DN, Pancoast, A, Papadakis, I, Parks, JR, Penny, MT, Pizzella, A, Pogge, RW, Poleski, R, Pott, J-U, Rafter, SE, Rix, H-W, Runnoe, J, Saylor, DA, Schimoia, JS, Schnuelle, K, Scott, B, Sergeev, SG, Shappee, BJ, Shivvers, I, Siegel, M, Simonian, GV, Siviero, A, Skielboe, A, Somers, G, Spencer, M, Starkey, D, Stevens, DJ, Sung, H-I, Tayar, J, Treu, T, Turner, CS, Uttley, P, Van Saders, J, Vican, L, Villanueva, S, Weiss, Y, Woo, J-H, Yan, H, Young, S, Yuk, H, Zheng, W, Zhu, W & Zu, Y 2021, '
Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548',
Astrophysical Journal, vol. 907, no. 2, 76.
https://doi.org/10.3847/1538-4357/abce60APA
Horne, K., Rosa, G. D., Peterson, B. M., Barth, A. J., Ely, J., Fausnaugh, M. M., Kriss, G. A., Pei, L., Bentz, M. C., Cackett, E. M., Edelson, R., Eracleous, M., Goad, M. R., Grier, C. J., Kaastra, J., Kochanek, C. S., Krongold, Y., Mathur, S., Netzer, H., ... Zu, Y. (2021).
Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548.
Astrophysical Journal,
907(2), [76].
https://doi.org/10.3847/1538-4357/abce60Vancouver
Horne K, Rosa GD, Peterson BM, Barth AJ, Ely J, Fausnaugh MM et al.
Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548.
Astrophysical Journal. 2021 Feb;907(2). 76.
https://doi.org/10.3847/1538-4357/abce60Author
Horne, Keith ; Rosa, G. De ; Peterson, B. M. ; Barth, A. J. ; Ely, J. ; Fausnaugh, M. M. ; Kriss, G. A. ; Pei, L. ; Bentz, M. C. ; Cackett, E. M. ; Edelson, R. ; Eracleous, M. ; Goad, M. R. ; Grier, C. J. ; Kaastra, J. ; Kochanek, C. S. ; Krongold, Y. ; Mathur, S. ; Netzer, H. ; Proga, D. ; Tejos, N. ; Vestergaard, M. ; Villforth, C. ; Adams, S. M. ; Anderson, M. D. ; Arevalo, P. ; Beatty, T. G. ; Bennert, V. N. ; Bigley, A. ; Bisogni, S. ; Borman, G. A. ; Boroson, T. A. ; Bottorff, M. C. ; Brandt, W. N. ; Breeveld, A. A. ; Brotherton, M. ; Brown, J. E. ; Brown, J. S. ; Canalizo, G. ; Carini, M. T. ; Clubb, K. I. ; Comerford, J. M. ; Corsini, E. M. ; Crenshaw, D. M. ; Croft, S. ; Croxall, K. V. ; Bonta, E. Dalla ; Deason, A. J. ; Dehghanian, M. ; Lorenzo-Caceres, A. De ; Denney, K. D. ; Dietrich, M. ; Done, C. ; Efimova, N. V. ; Evans, P. A. ; Ferland, G. J. ; Filippenko, A. V. ; Flatland, K. ; Fox, O. D. ; Gardner, E. ; Gates, E. L. ; Gehrels, N. ; Geier, S. ; Gelbord, J. M. ; Gonzalez, L. ; Gorjian, V. ; Greene, J. E. ; Grupe, D. ; Gupta, A. ; Hall, P. B. ; Henderson, C. B. ; Hicks, S. ; Holmbeck, E. ; Holoien, T. W. -S. ; Hutchison, T. ; Im, M. ; Jensen, J. J. ; Johnson, C. A. ; Joner, M. D. ; Jones, J. ; Kaspi, S. ; Kelly, P. L. ; Kennea, J. A. ; Kim, M. ; Kim, S. ; Kim, S. C. ; King, A. ; Klimanov, S. A. ; Korista, K. T. ; Lau, M. W. ; Lee, J. C. ; Leonard, D. C. ; Li, Miao ; Lira, P. ; Lochhaas, C. ; Ma, Zhiyuan ; MacInnis, F. ; Malkan, M. A. ; Manne-Nicholas, E. R. ; Mauerhan, J. C. ; McGurk, R. ; McHardy, I. M. ; Montuori, C. ; Morelli, L. ; Mosquera, A. ; Mudd, D. ; Muller-Sanchez, F. ; Nazarov, S. V. ; Norris, R. P. ; Nousek, J. A. ; Nguyen, M. L. ; Ochner, P. ; Okhmat, D. N. ; Pancoast, A. ; Papadakis, I. ; Parks, J. R. ; Penny, M. T. ; Pizzella, A. ; Pogge, R. W. ; Poleski, R. ; Pott, J. -U. ; Rafter, S. E. ; Rix, H. -W. ; Runnoe, J. ; Saylor, D. A. ; Schimoia, J. S. ; Schnuelle, K. ; Scott, B. ; Sergeev, S. G. ; Shappee, B. J. ; Shivvers, I. ; Siegel, M. ; Simonian, G. V. ; Siviero, A. ; Skielboe, A. ; Somers, G. ; Spencer, M. ; Starkey, D. ; Stevens, D. J. ; Sung, H. -I. ; Tayar, J. ; Treu, T. ; Turner, C. S. ; Uttley, P. ; Van Saders, J. ; Vican, L. ; Villanueva, S. ; Weiss, Y. ; Woo, J. -H. ; Yan, H. ; Young, S. ; Yuk, H. ; Zheng, W. ; Zhu, W. ; Zu, Y. / Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548. In: Astrophysical Journal. 2021 ; Vol. 907, No. 2.
Bibtex
@article{e97bf36f97844f30b0740313055e7891,
title = "Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548",
abstract = "In this contribution, we achieve the primary goal of the active galactic nucleus (AGN) STORM campaign by recovering velocity-delay maps for the prominent broad emission lines (Ly alpha, C IV, He II, and H beta) in the spectrum of NGC 5548. These are the most detailed velocity-delay maps ever obtained for an AGN, providing unprecedented information on the geometry, ionization structure, and kinematics of the broad-line region. Virial envelopes enclosing the emission-line responses show that the reverberating gas is bound to the black hole. A stratified ionization structure is evident. The He ii response inside 5-10 lt-day has a broad single-peaked velocity profile. The Ly alpha, C IV, and H beta responses extend from inside 2 to outside 20 lt-day, with double peaks at 2500 km s(-1) in the 10-20 lt-day delay range. An incomplete ellipse in the velocity-delay plane is evident in H beta. We interpret the maps in terms of a Keplerian disk with a well-defined outer rim at R = 20 lt-day. The far-side response is weaker than that from the near side. The line-center delay tau = (R/c)(1 - sin i) approximate to 5 days gives the inclination i approximate to 45 degrees. The inferred black hole mass is (BH) 7 x 10(7) M-circle dot. In addition to reverberations, the fit residuals confirm that emission-line fluxes are depressed during the {"}BLR Holiday{"} identified in previous work. Moreover, a helical {"}Barber-Pole{"} pattern, with stripes moving from red to blue across the C IV and Ly alpha line profiles, suggests azimuthal structure rotating with a 2 yr period that may represent precession or orbital motion of inner-disk structures casting shadows on the emission-line region farther out.",
keywords = "TERM PROFILE VARIABILITY, ACTIVE GALACTIC NUCLEUS, RADIATION PRESSURE, MASS, CONTINUUM, REGIONS, DISC",
author = "Keith Horne and Rosa, {G. De} and Peterson, {B. M.} and Barth, {A. J.} and J. Ely and Fausnaugh, {M. M.} and Kriss, {G. A.} and L. Pei and Bentz, {M. C.} and Cackett, {E. M.} and R. Edelson and M. Eracleous and Goad, {M. R.} and Grier, {C. J.} and J. Kaastra and Kochanek, {C. S.} and Y. Krongold and S. Mathur and H. Netzer and D. Proga and N. Tejos and M. Vestergaard and C. Villforth and Adams, {S. M.} and Anderson, {M. D.} and P. Arevalo and Beatty, {T. G.} and Bennert, {V. N.} and A. Bigley and S. Bisogni and Borman, {G. A.} and Boroson, {T. A.} and Bottorff, {M. C.} and Brandt, {W. N.} and Breeveld, {A. A.} and M. Brotherton and Brown, {J. E.} and Brown, {J. S.} and G. Canalizo and Carini, {M. T.} and Clubb, {K. I.} and Comerford, {J. M.} and Corsini, {E. M.} and Crenshaw, {D. M.} and S. Croft and Croxall, {K. V.} and Bonta, {E. Dalla} and Deason, {A. J.} and M. Dehghanian and Lorenzo-Caceres, {A. De} and Denney, {K. D.} and M. Dietrich and C. Done and Efimova, {N. V.} and Evans, {P. A.} and Ferland, {G. J.} and Filippenko, {A. V.} and K. Flatland and Fox, {O. D.} and E. Gardner and Gates, {E. L.} and N. Gehrels and S. Geier and Gelbord, {J. M.} and L. Gonzalez and V. Gorjian and Greene, {J. E.} and D. Grupe and A. Gupta and Hall, {P. B.} and Henderson, {C. B.} and S. Hicks and E. Holmbeck and Holoien, {T. W. -S.} and T. Hutchison and M. Im and Jensen, {J. J.} and Johnson, {C. A.} and Joner, {M. D.} and J. Jones and S. Kaspi and Kelly, {P. L.} and Kennea, {J. A.} and M. Kim and S. Kim and Kim, {S. C.} and A. King and Klimanov, {S. A.} and Korista, {K. T.} and Lau, {M. W.} and Lee, {J. C.} and Leonard, {D. C.} and Miao Li and P. Lira and C. Lochhaas and Zhiyuan Ma and F. MacInnis and Malkan, {M. A.} and Manne-Nicholas, {E. R.} and Mauerhan, {J. C.} and R. McGurk and McHardy, {I. M.} and C. Montuori and L. Morelli and A. Mosquera and D. Mudd and F. Muller-Sanchez and Nazarov, {S. V.} and Norris, {R. P.} and Nousek, {J. A.} and Nguyen, {M. L.} and P. Ochner and Okhmat, {D. N.} and A. Pancoast and I. Papadakis and Parks, {J. R.} and Penny, {M. T.} and A. Pizzella and Pogge, {R. W.} and R. Poleski and Pott, {J. -U.} and Rafter, {S. E.} and Rix, {H. -W.} and J. Runnoe and Saylor, {D. A.} and Schimoia, {J. S.} and K. Schnuelle and B. Scott and Sergeev, {S. G.} and Shappee, {B. J.} and I. Shivvers and M. Siegel and Simonian, {G. V.} and A. Siviero and A. Skielboe and G. Somers and M. Spencer and D. Starkey and Stevens, {D. J.} and Sung, {H. -I.} and J. Tayar and T. Treu and Turner, {C. S.} and P. Uttley and {Van Saders}, J. and L. Vican and S. Villanueva and Y. Weiss and Woo, {J. -H.} and H. Yan and S. Young and H. Yuk and W. Zheng and W. Zhu and Y. Zu",
year = "2021",
month = feb,
doi = "10.3847/1538-4357/abce60",
language = "English",
volume = "907",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing, Inc",
number = "2",
}
RIS
TY - JOUR
T1 - Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548
AU - Horne, Keith
AU - Rosa, G. De
AU - Peterson, B. M.
AU - Barth, A. J.
AU - Ely, J.
AU - Fausnaugh, M. M.
AU - Kriss, G. A.
AU - Pei, L.
AU - Bentz, M. C.
AU - Cackett, E. M.
AU - Edelson, R.
AU - Eracleous, M.
AU - Goad, M. R.
AU - Grier, C. J.
AU - Kaastra, J.
AU - Kochanek, C. S.
AU - Krongold, Y.
AU - Mathur, S.
AU - Netzer, H.
AU - Proga, D.
AU - Tejos, N.
AU - Vestergaard, M.
AU - Villforth, C.
AU - Adams, S. M.
AU - Anderson, M. D.
AU - Arevalo, P.
AU - Beatty, T. G.
AU - Bennert, V. N.
AU - Bigley, A.
AU - Bisogni, S.
AU - Borman, G. A.
AU - Boroson, T. A.
AU - Bottorff, M. C.
AU - Brandt, W. N.
AU - Breeveld, A. A.
AU - Brotherton, M.
AU - Brown, J. E.
AU - Brown, J. S.
AU - Canalizo, G.
AU - Carini, M. T.
AU - Clubb, K. I.
AU - Comerford, J. M.
AU - Corsini, E. M.
AU - Crenshaw, D. M.
AU - Croft, S.
AU - Croxall, K. V.
AU - Bonta, E. Dalla
AU - Deason, A. J.
AU - Dehghanian, M.
AU - Lorenzo-Caceres, A. De
AU - Denney, K. D.
AU - Dietrich, M.
AU - Done, C.
AU - Efimova, N. V.
AU - Evans, P. A.
AU - Ferland, G. J.
AU - Filippenko, A. V.
AU - Flatland, K.
AU - Fox, O. D.
AU - Gardner, E.
AU - Gates, E. L.
AU - Gehrels, N.
AU - Geier, S.
AU - Gelbord, J. M.
AU - Gonzalez, L.
AU - Gorjian, V.
AU - Greene, J. E.
AU - Grupe, D.
AU - Gupta, A.
AU - Hall, P. B.
AU - Henderson, C. B.
AU - Hicks, S.
AU - Holmbeck, E.
AU - Holoien, T. W. -S.
AU - Hutchison, T.
AU - Im, M.
AU - Jensen, J. J.
AU - Johnson, C. A.
AU - Joner, M. D.
AU - Jones, J.
AU - Kaspi, S.
AU - Kelly, P. L.
AU - Kennea, J. A.
AU - Kim, M.
AU - Kim, S.
AU - Kim, S. C.
AU - King, A.
AU - Klimanov, S. A.
AU - Korista, K. T.
AU - Lau, M. W.
AU - Lee, J. C.
AU - Leonard, D. C.
AU - Li, Miao
AU - Lira, P.
AU - Lochhaas, C.
AU - Ma, Zhiyuan
AU - MacInnis, F.
AU - Malkan, M. A.
AU - Manne-Nicholas, E. R.
AU - Mauerhan, J. C.
AU - McGurk, R.
AU - McHardy, I. M.
AU - Montuori, C.
AU - Morelli, L.
AU - Mosquera, A.
AU - Mudd, D.
AU - Muller-Sanchez, F.
AU - Nazarov, S. V.
AU - Norris, R. P.
AU - Nousek, J. A.
AU - Nguyen, M. L.
AU - Ochner, P.
AU - Okhmat, D. N.
AU - Pancoast, A.
AU - Papadakis, I.
AU - Parks, J. R.
AU - Penny, M. T.
AU - Pizzella, A.
AU - Pogge, R. W.
AU - Poleski, R.
AU - Pott, J. -U.
AU - Rafter, S. E.
AU - Rix, H. -W.
AU - Runnoe, J.
AU - Saylor, D. A.
AU - Schimoia, J. S.
AU - Schnuelle, K.
AU - Scott, B.
AU - Sergeev, S. G.
AU - Shappee, B. J.
AU - Shivvers, I.
AU - Siegel, M.
AU - Simonian, G. V.
AU - Siviero, A.
AU - Skielboe, A.
AU - Somers, G.
AU - Spencer, M.
AU - Starkey, D.
AU - Stevens, D. J.
AU - Sung, H. -I.
AU - Tayar, J.
AU - Treu, T.
AU - Turner, C. S.
AU - Uttley, P.
AU - Van Saders, J.
AU - Vican, L.
AU - Villanueva, S.
AU - Weiss, Y.
AU - Woo, J. -H.
AU - Yan, H.
AU - Young, S.
AU - Yuk, H.
AU - Zheng, W.
AU - Zhu, W.
AU - Zu, Y.
PY - 2021/2
Y1 - 2021/2
N2 - In this contribution, we achieve the primary goal of the active galactic nucleus (AGN) STORM campaign by recovering velocity-delay maps for the prominent broad emission lines (Ly alpha, C IV, He II, and H beta) in the spectrum of NGC 5548. These are the most detailed velocity-delay maps ever obtained for an AGN, providing unprecedented information on the geometry, ionization structure, and kinematics of the broad-line region. Virial envelopes enclosing the emission-line responses show that the reverberating gas is bound to the black hole. A stratified ionization structure is evident. The He ii response inside 5-10 lt-day has a broad single-peaked velocity profile. The Ly alpha, C IV, and H beta responses extend from inside 2 to outside 20 lt-day, with double peaks at 2500 km s(-1) in the 10-20 lt-day delay range. An incomplete ellipse in the velocity-delay plane is evident in H beta. We interpret the maps in terms of a Keplerian disk with a well-defined outer rim at R = 20 lt-day. The far-side response is weaker than that from the near side. The line-center delay tau = (R/c)(1 - sin i) approximate to 5 days gives the inclination i approximate to 45 degrees. The inferred black hole mass is (BH) 7 x 10(7) M-circle dot. In addition to reverberations, the fit residuals confirm that emission-line fluxes are depressed during the "BLR Holiday" identified in previous work. Moreover, a helical "Barber-Pole" pattern, with stripes moving from red to blue across the C IV and Ly alpha line profiles, suggests azimuthal structure rotating with a 2 yr period that may represent precession or orbital motion of inner-disk structures casting shadows on the emission-line region farther out.
AB - In this contribution, we achieve the primary goal of the active galactic nucleus (AGN) STORM campaign by recovering velocity-delay maps for the prominent broad emission lines (Ly alpha, C IV, He II, and H beta) in the spectrum of NGC 5548. These are the most detailed velocity-delay maps ever obtained for an AGN, providing unprecedented information on the geometry, ionization structure, and kinematics of the broad-line region. Virial envelopes enclosing the emission-line responses show that the reverberating gas is bound to the black hole. A stratified ionization structure is evident. The He ii response inside 5-10 lt-day has a broad single-peaked velocity profile. The Ly alpha, C IV, and H beta responses extend from inside 2 to outside 20 lt-day, with double peaks at 2500 km s(-1) in the 10-20 lt-day delay range. An incomplete ellipse in the velocity-delay plane is evident in H beta. We interpret the maps in terms of a Keplerian disk with a well-defined outer rim at R = 20 lt-day. The far-side response is weaker than that from the near side. The line-center delay tau = (R/c)(1 - sin i) approximate to 5 days gives the inclination i approximate to 45 degrees. The inferred black hole mass is (BH) 7 x 10(7) M-circle dot. In addition to reverberations, the fit residuals confirm that emission-line fluxes are depressed during the "BLR Holiday" identified in previous work. Moreover, a helical "Barber-Pole" pattern, with stripes moving from red to blue across the C IV and Ly alpha line profiles, suggests azimuthal structure rotating with a 2 yr period that may represent precession or orbital motion of inner-disk structures casting shadows on the emission-line region farther out.
KW - TERM PROFILE VARIABILITY
KW - ACTIVE GALACTIC NUCLEUS
KW - RADIATION PRESSURE
KW - MASS
KW - CONTINUUM
KW - REGIONS
KW - DISC
U2 - 10.3847/1538-4357/abce60
DO - 10.3847/1538-4357/abce60
M3 - Journal article
VL - 907
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2
M1 - 76
ER -
