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The Astronomer's Telegram                   http://www.astronomerstelegram.org
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ATEL #997                                                             ATEL #997

Title:                Pulse period of IGRJ11215-5952 from Swift/XRT data
Author:        L.Sidoli, S.Mereghetti, S.Vercellone (INAF-IASF Milano), V.Mangano,
                G.Cusumano (INAF-IASF Palermo), P.Romano (INAF-OABrera)
Queries:        sidoli@mi.iasf.cnr.it
Posted:        9 Feb 2007;  17:23  UT
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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Password Certification:  Lara Sidoli (sidoli@mi.iasf.cnr.it)
http://www.astronomerstelegram.org/?read=997