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Pulse period of IGRJ11215-5952 from Swift/XRT data

ATEL # 997; L.Sidoli, S.Mereghetti, S.Vercellone (INAF-IASF Milano), V.Mangano, G.Cusumano (INAF-IASF Palermo), P.Romano (INAF-OABrera)
on 9 Feb 2007; 17:23 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: Lara Sidoli (

Subjects: X-ray, Request for Observations, Binaries, Transients

Swift/XRT is performing a monitoring of the new outburst of the supergiant fast X-ray transient IGRJ11215-5952 (Romano et al., ATel #994; Mangano et al., ATel #995).

A timing analysis of the February 9 observation confirms the possible pulsation suggested by Smith et al. 2006 (ATel #773) from the analysis of the previous outburst with RXTE. The preliminary value from the Swift/XRT data indicates a period of 180.4 +/- 1 s.

An XMM-Newton observation is ongoing (started on Feb.09 at 16 UT) while a follow-up with INTEGRAL is scheduled to start on Feb. 11 at 15 UT. Observations at other wavelengths are particularly encouraged.

We would like to thank the Swift Team for making these observations possible, in particular N. Gehrels and D. Burrows, the duty scientists as well as the science planners.

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R. E. Rutledge , Editor
ATEL Mirror v1.0 Updates