Reverberation mapping of the kepler field agn KA1858+4850

Liuyi Pei; Aaron J. Barth; Greg S. Aldering; Michael M. Briley; Carla J. Carroll; Daniel J. Carson; S. Bradley Cenko; Kelsey I. Clubb; Daniel P. Cohen; Antonino Cucchiara; Tyler D. Desjardins; Rick Edelson; Jerome J. Fang; Joseph M. Fedrow; Alexei V. Filippenko; Ori D. Fox; Amy Furniss; Elinor L. Gates; Michael Gregg; Scott Gustafson; J. Chuck Horst; Michael D. Joner; Patrick L. Kelly; Mark Lacy; C. David Laney; Douglas C. Leonard; Weidong Li; Matthew A. Malkan; Bruce Margon; Marcel Neeleman; My L. Nguyen; J. Xavier Prochaska; Nathaniel R. Ross; David J. Sand; Kinchen J. Searcy; Isaac S. Shivvers; Jeffrey M. Silverman; Graeme H. Smith; Nao Suzuki; Krista Lynne Smith; David Tytler; Jessica K. Werk; Gábor Worseck

doi:10.1088/0004-637X/795/1/38

Reverberation mapping of the kepler field agn KA1858+4850

Liuyi Pei, Aaron J. Barth, Greg S. Aldering, Michael M. Briley, Carla J. Carroll, Daniel J. Carson, S. Bradley Cenko, Kelsey I. Clubb, Daniel P. Cohen, Antonino Cucchiara, Tyler D. Desjardins, Rick Edelson, Jerome J. Fang, Joseph M. Fedrow, Alexei V. Filippenko, Ori D. Fox, Amy Furniss, Elinor L. Gates, Michael Gregg, Scott GustafsonJ. Chuck Horst, Michael D. Joner, Patrick L. Kelly, Mark Lacy, C. David Laney, Douglas C. Leonard, Weidong Li, Matthew A. Malkan, Bruce Margon, Marcel Neeleman, My L. Nguyen, J. Xavier Prochaska, Nathaniel R. Ross, David J. Sand, Kinchen J. Searcy, Isaac S. Shivvers, Jeffrey M. Silverman, Graeme H. Smith, Nao Suzuki, Krista Lynne Smith, David Tytler, Jessica K. Werk, Gábor Worseck

Minnesota Institute for Astrophysics

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

KA1858+4850 is a narrow-line Seyfert 1 galaxy at redshift 0.078 and is among the brightest active galaxies monitored by the Kepler mission. We have carried out a reverberation mapping campaign designed to measure the broad-line region size and estimate the mass of the black hole in this galaxy. We obtained 74 epochs of spectroscopic data using the Kast Spectrograph at the Lick 3 m telescope from 2012 February to November, and obtained complementary V-band images from five other ground-based telescopes. We measured the Hβ light curve lag with respect to the V-band continuum light curve using both cross-correlation techniques (CCF) and continuum light curve variability modeling with the JAVELIN method and found rest-frame lags of days and τ_JAVELINdays. The Hβ rms line profile has a width of σ_line = 770 ± 49 km s^-1. Combining these two results and assuming a virial scale factor of f = 5.13, we obtained a virial estimate of for the mass of the central black hole and an Eddington ratio of L/L _Edd 0.2. We also obtained consistent but slightly shorter emission-line lags with respect to the Kepler light curve. Thanks to the Kepler mission, the light curve of KA1858+4850 has among the highest cadences and signal-to-noise ratios ever measured for an active galactic nucleus; thus, our black hole mass measurement will serve as a reference point for relations between black hole mass and continuum variability characteristics in active galactic nuclei.

Original language	English (US)
Article number	38
Journal	Astrophysical Journal
Volume	795
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/795/1/38
State	Published - Nov 1 2014

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© 2014. The American Astronomical Society. All rights reserved..

Keywords

Galaxies: active
Galaxies: individual (1RXSJ185800.9+485020)
Galaxies: nuclei

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Pei, L., Barth, A. J., Aldering, G. S., Briley, M. M., Carroll, C. J., Carson, D. J., Cenko, S. B., Clubb, K. I., Cohen, D. P., Cucchiara, A., Desjardins, T. D., Edelson, R., Fang, J. J., Fedrow, J. M., Filippenko, A. V., Fox, O. D., Furniss, A., Gates, E. L., Gregg, M., ... Worseck, G. (2014). Reverberation mapping of the kepler field agn KA1858+4850. Astrophysical Journal, 795(1), Article 38. https://doi.org/10.1088/0004-637X/795/1/38

Pei, L, Barth, AJ, Aldering, GS, Briley, MM, Carroll, CJ, Carson, DJ, Cenko, SB, Clubb, KI, Cohen, DP, Cucchiara, A, Desjardins, TD, Edelson, R, Fang, JJ, Fedrow, JM, Filippenko, AV, Fox, OD, Furniss, A, Gates, EL, Gregg, M, Gustafson, S, Horst, JC, Joner, MD, Kelly, PL, Lacy, M, Laney, CD, Leonard, DC, Li, W, Malkan, MA, Margon, B, Neeleman, M, Nguyen, ML, Prochaska, JX, Ross, NR, Sand, DJ, Searcy, KJ, Shivvers, IS, Silverman, JM, Smith, GH, Suzuki, N, Smith, KL, Tytler, D, Werk, JK & Worseck, G 2014, 'Reverberation mapping of the kepler field agn KA1858+4850', Astrophysical Journal, vol. 795, no. 1, 38. https://doi.org/10.1088/0004-637X/795/1/38

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title = "Reverberation mapping of the kepler field agn KA1858+4850",

abstract = "KA1858+4850 is a narrow-line Seyfert 1 galaxy at redshift 0.078 and is among the brightest active galaxies monitored by the Kepler mission. We have carried out a reverberation mapping campaign designed to measure the broad-line region size and estimate the mass of the black hole in this galaxy. We obtained 74 epochs of spectroscopic data using the Kast Spectrograph at the Lick 3 m telescope from 2012 February to November, and obtained complementary V-band images from five other ground-based telescopes. We measured the Hβ light curve lag with respect to the V-band continuum light curve using both cross-correlation techniques (CCF) and continuum light curve variability modeling with the JAVELIN method and found rest-frame lags of days and τJAVELINdays. The Hβ rms line profile has a width of σline = 770 ± 49 km s-1. Combining these two results and assuming a virial scale factor of f = 5.13, we obtained a virial estimate of for the mass of the central black hole and an Eddington ratio of L/L Edd 0.2. We also obtained consistent but slightly shorter emission-line lags with respect to the Kepler light curve. Thanks to the Kepler mission, the light curve of KA1858+4850 has among the highest cadences and signal-to-noise ratios ever measured for an active galactic nucleus; thus, our black hole mass measurement will serve as a reference point for relations between black hole mass and continuum variability characteristics in active galactic nuclei.",

keywords = "Galaxies: active, Galaxies: individual (1RXSJ185800.9+485020), Galaxies: nuclei",

author = "Liuyi Pei and Barth, {Aaron J.} and Aldering, {Greg S.} and Briley, {Michael M.} and Carroll, {Carla J.} and Carson, {Daniel J.} and Cenko, {S. Bradley} and Clubb, {Kelsey I.} and Cohen, {Daniel P.} and Antonino Cucchiara and Desjardins, {Tyler D.} and Rick Edelson and Fang, {Jerome J.} and Fedrow, {Joseph M.} and Filippenko, {Alexei V.} and Fox, {Ori D.} and Amy Furniss and Gates, {Elinor L.} and Michael Gregg and Scott Gustafson and Horst, {J. Chuck} and Joner, {Michael D.} and Kelly, {Patrick L.} and Mark Lacy and Laney, {C. David} and Leonard, {Douglas C.} and Weidong Li and Malkan, {Matthew A.} and Bruce Margon and Marcel Neeleman and Nguyen, {My L.} and Prochaska, {J. Xavier} and Ross, {Nathaniel R.} and Sand, {David J.} and Searcy, {Kinchen J.} and Shivvers, {Isaac S.} and Silverman, {Jeffrey M.} and Smith, {Graeme H.} and Nao Suzuki and Smith, {Krista Lynne} and David Tytler and Werk, {Jessica K.} and G{\'a}bor Worseck",

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AU - Pei, Liuyi

AU - Barth, Aaron J.

AU - Aldering, Greg S.

AU - Briley, Michael M.

AU - Carroll, Carla J.

AU - Carson, Daniel J.

AU - Cenko, S. Bradley

AU - Clubb, Kelsey I.

AU - Cohen, Daniel P.

AU - Cucchiara, Antonino

AU - Desjardins, Tyler D.

AU - Edelson, Rick

AU - Fang, Jerome J.

AU - Fedrow, Joseph M.

AU - Filippenko, Alexei V.

AU - Fox, Ori D.

AU - Furniss, Amy

AU - Gates, Elinor L.

AU - Gregg, Michael

AU - Gustafson, Scott

AU - Horst, J. Chuck

AU - Joner, Michael D.

AU - Kelly, Patrick L.

AU - Lacy, Mark

AU - Laney, C. David

AU - Leonard, Douglas C.

AU - Li, Weidong

AU - Malkan, Matthew A.

AU - Margon, Bruce

AU - Neeleman, Marcel

AU - Nguyen, My L.

AU - Prochaska, J. Xavier

AU - Ross, Nathaniel R.

AU - Sand, David J.

AU - Searcy, Kinchen J.

AU - Shivvers, Isaac S.

AU - Silverman, Jeffrey M.

AU - Smith, Graeme H.

AU - Suzuki, Nao

AU - Smith, Krista Lynne

AU - Tytler, David

AU - Werk, Jessica K.

AU - Worseck, Gábor

PY - 2014/11/1

Y1 - 2014/11/1

N2 - KA1858+4850 is a narrow-line Seyfert 1 galaxy at redshift 0.078 and is among the brightest active galaxies monitored by the Kepler mission. We have carried out a reverberation mapping campaign designed to measure the broad-line region size and estimate the mass of the black hole in this galaxy. We obtained 74 epochs of spectroscopic data using the Kast Spectrograph at the Lick 3 m telescope from 2012 February to November, and obtained complementary V-band images from five other ground-based telescopes. We measured the Hβ light curve lag with respect to the V-band continuum light curve using both cross-correlation techniques (CCF) and continuum light curve variability modeling with the JAVELIN method and found rest-frame lags of days and τJAVELINdays. The Hβ rms line profile has a width of σline = 770 ± 49 km s-1. Combining these two results and assuming a virial scale factor of f = 5.13, we obtained a virial estimate of for the mass of the central black hole and an Eddington ratio of L/L Edd 0.2. We also obtained consistent but slightly shorter emission-line lags with respect to the Kepler light curve. Thanks to the Kepler mission, the light curve of KA1858+4850 has among the highest cadences and signal-to-noise ratios ever measured for an active galactic nucleus; thus, our black hole mass measurement will serve as a reference point for relations between black hole mass and continuum variability characteristics in active galactic nuclei.

AB - KA1858+4850 is a narrow-line Seyfert 1 galaxy at redshift 0.078 and is among the brightest active galaxies monitored by the Kepler mission. We have carried out a reverberation mapping campaign designed to measure the broad-line region size and estimate the mass of the black hole in this galaxy. We obtained 74 epochs of spectroscopic data using the Kast Spectrograph at the Lick 3 m telescope from 2012 February to November, and obtained complementary V-band images from five other ground-based telescopes. We measured the Hβ light curve lag with respect to the V-band continuum light curve using both cross-correlation techniques (CCF) and continuum light curve variability modeling with the JAVELIN method and found rest-frame lags of days and τJAVELINdays. The Hβ rms line profile has a width of σline = 770 ± 49 km s-1. Combining these two results and assuming a virial scale factor of f = 5.13, we obtained a virial estimate of for the mass of the central black hole and an Eddington ratio of L/L Edd 0.2. We also obtained consistent but slightly shorter emission-line lags with respect to the Kepler light curve. Thanks to the Kepler mission, the light curve of KA1858+4850 has among the highest cadences and signal-to-noise ratios ever measured for an active galactic nucleus; thus, our black hole mass measurement will serve as a reference point for relations between black hole mass and continuum variability characteristics in active galactic nuclei.

KW - Galaxies: active

KW - Galaxies: individual (1RXSJ185800.9+485020)

KW - Galaxies: nuclei

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U2 - 10.1088/0004-637X/795/1/38

DO - 10.1088/0004-637X/795/1/38

M3 - Article

AN - SCOPUS:84908099529

SN - 0004-637X

VL - 795

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 38

ER -

Reverberation mapping of the kepler field agn KA1858+4850

Abstract

Bibliographical note

Keywords

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