A two-year monitoring campaign of Supergiant Fast X-ray Transients with Swift

Details A two-year monitoring campaign of Supergiant Fast X-ray Transients with Swift A two-year monitoring campaign of Supergiant Fast X-ray Transients with Swift

2011-02-17

arxiv.org/abs/1102.3693v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

Proceedings of the 8th INTEGRAL Workshop "The Restless Gamma-ray Universe", September 27-30 2010, Dublin, Ireland

Scientific paper

Swift is the only observatory which, due to its unique fast-slewing capability and broad-band energy coverage, can detect outbursts from Supergiant Fast X-ray Transients (SFXTs) from the very beginning and study their evolution panchromatically. Thanks to its flexible observing scheduling, which makes monitoring cost-effective, Swift has also performed a campaign that covers all phases of the lives of SFXTs with a high sensitivity in the soft X-ray regime, where most SFXTs had not been observed before. Our continued effort at monitorning SFXTs with 2-3 observations per week (1-2 ks) with the Swift X-Ray Telescope (XRT) over their entire visibility period has just finished its second year. We report on our findings on the long-term properties of SFXTs, their duty cycle, and the new outbursts caught by Swift during the second year.

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