Absolute timing with IBIS, SPI and JEM-X aboard INTEGRAL

Details Absolute timing with IBIS, SPI and JEM-X aboard INTEGRAL Absolute timing with IBIS, SPI and JEM-X aboard INTEGRAL

2003-09-05

arxiv.org/abs/astro-ph/0309178v1

Astron.Astrophys.411:L31-L36,2003

Astronomy and Astrophysics

Astrophysics

6 pages, 6 figures (3 in color), accepted for publ. in special INTEGRAL A&A issue

Scientific paper

10.1051/0004-6361:20031353

We have verified the absolute timing capabilities of the high-energy instruments aboard INTEGRAL, i.e. the imager IBIS, the spectrometer SPI and the X-ray monitor JEM-X. Calibration observations of the Crab, contemporaneous with the Rossi X-ray Timing Explorer (RXTE), have been used to measure the absolute phase of the main pulse of the Crab pulse profile using the same Jodrell Bank radio ephemeris. The three INTEGRAL instruments and RXTE give within the statistical and systematic uncertainties consistent results: The X-ray main pulse is leading the radio pulse by 280 +/- 40 microsec. Also the shapes of the X-ray pulse profiles as measured by the different instruments are fully consistent with each other.

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