Package: timedelay 1.0.11
timedelay: Time Delay Estimation for Stochastic Time Series of Gravitationally Lensed Quasars
We provide a toolbox to estimate the time delay between the brightness time series of gravitationally lensed quasar images via Bayesian and profile likelihood approaches. The model is based on a state-space representation for irregularly observed time series data generated from a latent continuous-time Ornstein-Uhlenbeck process. Our Bayesian method adopts scientifically motivated hyper-prior distributions and a Metropolis-Hastings within Gibbs sampler, producing posterior samples of the model parameters that include the time delay. A profile likelihood of the time delay is a simple approximation to the marginal posterior distribution of the time delay. Both Bayesian and profile likelihood approaches complement each other, producing almost identical results; the Bayesian way is more principled but the profile likelihood is easier to implement. A new functionality is added in version 1.0.9 for estimating the time delay between doubly-lensed light curves observed in two bands. See also Tak et al. (2017) <doi:10.1214/17-AOAS1027>, Tak et al. (2018) <doi:10.1080/10618600.2017.1415911>, Hu and Tak (2020) <arxiv:2005.08049>.
Authors:
timedelay_1.0.11.tar.gz
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timedelay.pdf |timedelay.html✨
timedelay/json (API)
# Install 'timedelay' in R: |
install.packages('timedelay', repos = c('https://hyungsuktak.r-universe.dev', 'https://cloud.r-project.org')) |
- simple - Simulated simple data of a doubly-lensed quasar
- simple.band1 - Simulated simple data of a doubly-lensed quasar observed in band 1
- simple.band2 - Simulated simple data of a doubly-lensed quasar observed in band 2
This package does not link to any Github/Gitlab/R-forge repository. No issue tracker or development information is available.
Last updated 4 years agofrom:9a87917b58. Checks:OK: 7. Indexed: yes.
Target | Result | Date |
---|---|---|
Doc / Vignettes | OK | Oct 15 2024 |
R-4.5-win | OK | Oct 15 2024 |
R-4.5-linux | OK | Oct 15 2024 |
R-4.4-win | OK | Oct 15 2024 |
R-4.4-mac | OK | Oct 15 2024 |
R-4.3-win | OK | Oct 15 2024 |
R-4.3-mac | OK | Oct 15 2024 |
Exports:bayesianbayesian.multibandentirelogprofilelikelihoodLog.post.deltaLog.post.thetalogpostDeltaorderDatapostBetapostThetapostTheta.multipostXpostX.multi
Readme and manuals
Help Manual
Help page | Topics |
---|---|
Estimating the time delay via the Bayesian method | bayesian |
Estimating the time delay between doubly-lensed multi-band light curves in a Bayesian way | bayesian.multiband |
Calculating the entire profilel likelihood curve over the given grid values of the time delay | entirelogprofilelikelihood |
Simulated simple data of a doubly-lensed quasar | simple |
Simulated simple data of a doubly-lensed quasar observed in band 1 | simple.band1 |
Simulated simple data of a doubly-lensed quasar observed in band 2 | simple.band2 |
Time Delay Estimation for Stochastic Time Series of Gravitationally Lensed Quasars | timedelay-package timedelay |