SPEAR: Stochastic Process Estimation for AGN Reverberations

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JAVELIN: Just Another Vehicle for Estimating Lags In Nuclei

Post by owlice » Sun Oct 10, 2010 4:25 pm

JAVELIN: Just Another Vehicle for Estimating Lags In Nuclei

Abstract: JAVELIN (formerly known as SPEAR) is an approach to reverberation mapping that computes the lags between the AGN continuum and emission line light curves and their statistical confidence limits. It uses a damped random walk model to describe the quasar continuum variability and the ansatz that emission line variability is a scaled, smoothed and displaced version of the continuum. While currently configured only to simultaneously fit light curve means, it includes a general linear parameters formalism to fit more complex trends or calibration offsets. The noise matrix can be modified to allow for correlated errors, and the correlation matrix can be modified to use a different stochastic process. The transfer function model is presently a tophat, but this can be altered by changing the line-continuum covariance matrices. It is also able to cope with some problems in traditional reverberation mapping, such as irregular sampling, correlated errors and seasonal gaps.

Credit: Zu, Ying; Kochanek, C. S.; Peterson, Bradley M.

Site: http://www.astronomy.ohio-state.edu/~yingzu/spear.html

Bibcode: 2010ascl.soft10007Z

Preferred citation method: For: Quasar optical variability studies, http://adsabs.harvard.edu/abs/2013ApJ...765..106Z; Spectroscopic reverb mapping, http://adsabs.harvard.edu/abs/2011ApJ...735...80Z; Photometric reverb mapping, http://adsabs.harvard.edu/abs/2016ApJ...819..122Z

ID: ascl:1010.007
Last edited by Ada Coda on Sun Aug 30, 2020 9:16 pm, edited 1 time in total.
Reason: Updated code entry.
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