Skip to main content

To find and download HEASARC data in the cloud, you can use astroquery.heasarc or download our new tool, hark.

The HEASARC and NuSTAR teams are greatly saddened by the sudden passing of Katja Pottschmidt. Most recently Katja was the lead scientist for the NuSTAR Guest Observer Facility (GOF), a role she had supported for many years. During her science career she worked on many other high energy astrophysics missions and played an integral role in advancing our knowledge of the universe. She was a wonderful colleague and friend and will be keenly missed by all who knew her.

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