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Swift Observations Confirm the Activity of IGR J00291+5934

ATEL # 1664; C. B. Markwardt (U.Md./CRESST/NASA/GSFC) and J. H. Swank (NASA/GSFC)
on 16 Aug 2008; 2:00 UT
Password Certification: Craig B. Markwardt (

Subjects: X-ray, Binaries, Cataclysmic Variables, Neutron Stars, Pulsars, Transients, Variables
Referred to by ATEL #: 1665

We obtained a Swift observation of the field containing IGR J00291+5934 on 2008-08-15 starting at 14:50 UT for approximately 2000 seconds of exposure.

We clearly detect IGR J00291+5934 with the XRT instrument, confirming the previous report of outburst (Chakrabarty et al., ATEL #1660). The source is rather piled up, but we can say that flux is comparable to, or slightly smaller than, the flux reported by RXTE PCA.

A nearby intermediate polar source, V709 Cas, is also present in the XRT field of view. The 0.5-10 keV flux of this source is approximately 3.7 x 10-11 erg s-1 cm-2, based on a power law model with photon index 0.92. Thus, V709 Cas contributes a significant amount of contamination to the 1 degree-radius field of view of the RXTE PCA instrument (but this may depend on time).

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