OzDES Reverberation Mapping Programme: the first Mg II lags from 5 yr of monitoring
Date Issued
2021
Author(s)
Yu, Zhefu
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Martini, Paul
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Penton, A.
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Davis, T. M.
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Malik, U.
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Lidman, C.
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Tucker, B. E.
•
Sharp, R.
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Kochanek, C. S.
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Peterson, B. M.
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Aguena, M.
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Allam, S.
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Andrade-Oliveira, F.
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Annis, J.
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Asorey, J.
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Bertin, E.
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Brooks, D.
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Burke, D. L.
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Calcino, J.
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Carnero Rosell, A.
•
•
Carrasco Kind, M.
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Costanzi, M.
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da Costa, L. N.
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da Silva Pereira, M. E. S.
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Diehl, H. T.
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Everett, S.
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Ferrero, I.
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Flaugher, B.
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Frieman, J.
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García-Bellido, J.
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Gaztanaga, E.
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Gerdes, D. W.
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Gruen, D.
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Gruendl, R. A.
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Gschwend, J.
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Gutierrez, G.
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Hinton, S. R.
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Hollowood, D. L.
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James, D. J.
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Kim, A. G.
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Kron, R.
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Kuehn, K.
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Kuropatkin, N.
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Lewis, G. F.
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Maia, M. A. G.
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March, M.
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Marshall, J. L.
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Menanteau, F.
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Miquel, R.
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Morgan, R.
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Möller, A.
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Palmese, A.
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Paz-Chinchón, F.
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Plazas, A. A.
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Sanchez, E.
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Scarpine, V.
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Serrano, S.
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Sevilla-Noarbe, I.
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Smith, M.
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Soares-Santos, M.
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Suchyta, E.
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Tarle, G.
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Thomas, D.
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To, C.
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Tucker, D. L.
Abstract
Reverberation mapping is a robust method to measure the masses of supermassive black holes outside of the local Universe. Measurements of the radius-luminosity (R-L) relation using the Mg II emission line are critical for determining these masses near the peak of quasar activity at z ≈ 1-2, and for calibrating secondary mass estimators based on Mg II that can be applied to large samples with only single-epoch spectroscopy. We present the first nine Mg II lags from our 5-yr Australian Dark Energy Survey reverberation mapping programme, which substantially improves the number and quality of Mg II lag measurements. As the Mg II feature is somewhat blended with iron emission, we model and subtract both the continuum and iron contamination from the multiepoch spectra before analysing the Mg II line. We also develop a new method of quantifying correlated spectroscopic calibration errors based on our numerous, contemporaneous observations of F-stars. The lag measurements for seven of our nine sources are consistent with both the H β and Mg II R-L relations reported by previous studies. Our simulations verify the lag reliability of our nine measurements, and we estimate that the median false positive rate of the lag measurements is $4{{\ \rm per\ cent}}$....
Volume
507
Issue
3
Start page
3771
Issn Identifier
0035-8711
Ads BibCode
2021MNRAS.507.3771Y
Rights
open.access
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