reltrans
a spectral-timing code for accreting black holes
a spectral-timing code for accreting black holes
About reltrans
reltrans is an X-ray reverberation mapping code that that self-consistently combines reflection spectral characteristics and time delays due to the different light crossing time between the direct and the reflected emission of accreting black hole emission to accurately constrain the system properties such as black hole mass and spin.
The model can be loaded into XSPEC with a typical running time less than a second.
applicable to complex energy dependent cross-spectrum (which includes time-averaged energy spectrum)
lamppost, multiple lampposts
impulse response formalism
python and xspec compatibility
HEASoft, xillver tables, python3 with numpy and astropy to re-normalise the xillver tables
latest v.2.3.0
We fix a number of bug and we change the definition of kTe and the method that performs the relativistic convolution.
The keT parameter is now the temperature in the source rest frame which is used in the reltrans flavours where the continum is nthcomp model (reltransDCp, rtransDpl, rtdist). The Ecut parameter used in the reltrans flavours where the continum is a powerlaw model (reltransPL) is the high energy cut-off in the observered rest frame.
Bug fix in rtdist that overestimated the distance by a factor sqrt(4pi). No other flavour is affected.
The config.sh script creates the re-normalised xillver tables that reltrans uses to compute the reflection spectrum in the disk rest frame.
reltransDCp
reltransDCp can be considered the “default” version of the lastest reltrans release. It assumes that the disk is illuminated by a nthcomp spectrum and the disk is a variable density disk with a fixed high energy cutoff at 300keV. This means that it used the xillverDCp tables.
rtransDbl
reltransDbl is identical to reltransDCP except that it assumes that there are 2 illuminating sources.
reltransPL
reltransPL is identical to reltransDCP except that it assumes that the disk is illuminated by a powerlaw spectrum. This means that it used the xillverDCp tables.
rtdist
rtdist is a variant of reltransDCp. It self-consistently calculates the disk ionisation by calculating the geometric reltationship between the observer, source of illuminating spectrum and the disk. It also features a change to the previous boost normalisation factor for the reflection spectrum which is changed to 2 emissivity parameters which directs the emission in a manner that is more physical.
Link at the notebook...(work in progress)