Absolute timing with the SWIFT X-ray telescope (XRT)

G. Cusumano, V. Mangano, T. Mineo, V. La Parola, A. La Barbera, S. Campana, G. Chincarini, G. Tagliaferri, A. Moretti, P. Romano, M. Capalbi, M. Perri, P. Giommi, D. Burrows, D. Morris, J. E. Hill, J. Kennea, J. A. Nousek, C. Pagani, L. AngeliniJ. P. Osborne, A. F. Abbey, A. Beardmore, M. R. Goad, K. Page, A. Wells

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


The X-ray telescope (XRT) on board Swift, launched on 2004 Nov 20, is performing astrometric, spectroscopic and photometric observations of the X-ray emission from Gamma-ray burst afterglows in the energy band 0.2-10 keV. In this paper, we describe the results of the in-flight calibration relative to the XRT timing resolution and absolute timing capabilities. The timing calibration has been performed comparing the main pulse phases of the Crab profile obtained from several XRT observations in Low Rate Photodiode and Windowed Timing mode with those from contemporaneous RXTE observations. The XRT absolute timing is well reproduced with an accuracy of 200 μs for the Low Rate Photodiode and 300 μs for the Windowed Timing mode.

Original languageEnglish (US)
Article number58981A
Pages (from-to)1-6
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Dec 1 2005
EventUV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIV - San Diego, CA, United States
Duration: Aug 1 2005Aug 3 2005

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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