FTOOLS: The XRONOS Sub-package

The XRONOS sub-package of FTOOLS is a general purpose timing analysis package.

The following XRONOS tasks were included in the latest release of the HEASARC's FTOOLS package. Each task is hyperlinked to the help file distributed with the task. The same information can be obtained while running FTOOLS by typing the command fhelp {taskname}.

XRONOS Tasks

ascii2flc

creates a xronos input FITS file from an ASCII file

autocor

calculates auto correlation for a time series

crosscor

calculates cross correlation of two time series

earth2sun

change times to solar system barycenter

efold

creates epoch folded lightcurve, hardness and color-color plots

efsearch

finds best chi-squared period by folding over range of periods

flc2ascii

Dump xronos input or output in ASCII file readable by QDP

lcmath

Subtracts or adds two binned lightcurves

lcstats

calculates statistical variables a time series

lcurve

creates lightcurves, hardness and color-color plots

listdata

list data file on the screen

powspec

creates power spectrum density

rbf2fits

Converts the "EXOSAT rate buffer" format in FITS

timeskew

calculates time skewness function for a time series

xronwin

creates a window file suitable for xronos tasks