Calibration of the <i>Rossi X‐Ray Timing Explorer</i> Proportional Counter Array
K. JahodaNASA Goddard Space Flight Center, X-Ray Astrophysics Laboratory, Code 662, Greenbelt, MD 20771C. B. MarkwardtDepartment of Astronomy, University of Maryland, College Park, MD 20742-2421Y. L. RadevaDepartment of Astronomy, University of Maryland, College Park, MD 20742-2421A. H. RotsHarvard Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138Michael J. StarkDepartment of Physics, Lafayette College, Easton, PA 18042J. H. SwankNASA Goddard Space Flight Center, X-Ray Astrophysics Laboratory, Code 662, Greenbelt, MD 20771Tod E. StrohmayerNASA Goddard Space Flight Center, X-Ray Astrophysics Laboratory, Code 662, Greenbelt, MD 20771William ZhangNASA Goddard Space Flight Center, X-Ray Astrophysics Laboratory, Code 662, Greenbelt, MD 20771
2006en
ABI
Аннотация
We present the calibration and background model for the Proportional Counter Array (PCA) aboard the Rossi X-ray Timing Explorer (RXTE). The energy calibration is systematics limited below 10 keV with deviations from a power-law fit to the Crab nebula plus pulsar less than 1%. Unmodelled variations in the instrument background amount to less than 2% of the observed background below 10 keV and less than 1% between 10 and 20 keV. Individual photon arrival times are accurate to 4.4 micro-seconds at all times during the mission and to 2.5 micro-seconds after 29 April 1997. The peak pointing direction of the five collimators is known to a precision of a few arc-seconds
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