OzDES reverberation mapping program: Lag recovery reliability for 6-yr C iv analysis

A. Penton, U. Malik, T. M. Davis, P. Martini, Z. Yu, R. Sharp, C. Lidman, B. E. Tucker, J. K. Hoormann, M. Aguena, S. Allam, J. Annis, J. Asorey, D. Bacon, E. Bertin, S. Bhargava, D. Brooks, J. Calcino, A. Carnero Rosell, D. CarolloM. Carrasco Kind, J. Carretero, M. Costanzi, L. N. Da Costa, M. E.S. Pereira, J. De Vicente, H. T. Diehl, T. F. Eifler, S. Everett, I. Ferrero, P. Fosalba, J. Frieman, J. García-Bellido, E. Gaztanaga, D. W. Gerdes, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. J. James, A. G. Kim, K. Kuehn, N. Kuropatkin, M. A.G. Maia, J. L. Marshall, F. Menanteau, R. Miquel, R. Morgan, A. Möller, A. Palmese, F. Paz-Chinchón, A. A. Plazas, A. K. Romer, E. Sanchez, V. Scarpine, D. Scolnic, S. Serrano, M. Smith, E. Suchyta, M. E.C. Swanson, G. Tarle, C. To, S. A. Uddin, T. N. Varga, W. Wester, R. D. Wilkinson, G. Lewis

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We present the statistical methods that have been developed to analyse the OzDES reverberation mapping sample. To perform this statistical analysis we have created a suite of customizable simulations that mimic the characteristics of each source in the OzDES sample. These characteristics include: the variability in the photometric and spectroscopic light curves, the measurement uncertainties, and the observational cadence. By simulating the sources in the OzDES sample that contain the C iv emission line, we developed a set of criteria that rank the reliability of a recovered time-lag depending on the agreement between different recovery methods, the magnitude of the uncertainties, and the rate at which false positives were found in the simulations. These criteria were applied to simulated light curves and these results used to estimate the quality of the resulting Radius-Luminosity relation. We grade the results using three quality levels (gold, silver, and bronze). The input slope of the R-L relation was recovered within 1σ for each of the three quality samples, with the gold standard having the lowest dispersion with a recovered a R-L relation slope of 0.454 ± 0.016 with an input slope of 0.47. Future work will apply these methods to the entire OzDES sample of 771 AGN.

Original languageEnglish (US)
Pages (from-to)4008-4023
Number of pages16
JournalMonthly Notices of the Royal Astronomical Society
Volume509
Issue number3
DOIs
StatePublished - Jan 1 2022

Keywords

  • galaxies: active
  • quasars: emission lines
  • quasars: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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