ROSAT Guest Observer Facility

Has the ROSAT clock lost time?

(12/15/91)


Yes. The clock lost about 1.5 seconds in the first 200 days of the mission. A linear fit to the O-C relation for 1990 leaves a parabolic- shaped residual plot. A quadratic fit applied to the data after they are divided into three subsamples leaves residuals of less than two msec. For 1991, information is only available to June. Here, a linear fit leaves residuals of about 2.5 msec. Further details are available in files to be found in the ftp doc/rosat/ subdirectory.


button Select another question related to data analysis

Select another FAQ topic Select another FAQ topic Return to the ROSAT GOF Return to the ROSAT GOF



Please use the Feedback link if you have questions on ROSAT.

This file was last modified on Wednesday, 20-Oct-2021 10:56:29 EDT

NASA Astrophysics

  • FAQ/Comments/Feedback
  • Education Resources
  • Download Adobe Acrobat
  • A service of the Astrophysics Science Division (ASD) at NASA/ GSFC

    ROSAT Project Scientist: Dr. Robert Petre

    Responsible NASA Official: Dr. Andy Ptak

    Privacy Policy and Important Notices.