HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.

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filter phase

This allows you to enter one epoch-period combination, and up to ten phases. The subsequent extract command will use the union of all these phases to filter the data. If there is a phase file already present, you are given the chance to save it before proceeding. 

xsel > filter phase epoch period phase save_file

The epoch is in MJD (in the same time system as the data), the period in days, and the phase(s) run from 0-1.

So to filter using the epoch 40000, period of .5 days, and the first and third quarters of the period, say 

xsel > filter 40000 .5 "0.0-.25,0.5-0.75"

The double quotes are necessary to protect the comma.


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Last modified: Tuesday, 10-Jan-2023 11:03:01 EST

HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.