XMM-Newton Proposal 02045002

Details XMM-Newton Proposal 02045002 XMM-Newton Proposal 02045002

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop..238p&link_type=abstract

XMM-Newton Proposal ID #02045002

Computer Science

Igr J16358-4726, Igr J16358-4726, Xmm-Newton Proposal 02045002

Scientific paper

The transient IGR J16358-4726 was discovered on 2003 March 19 by INTEGRAL. Our March 24th CXO observation detected the transient at the 1.7e-10 erg cm^-2 s^-1 flux level (unabs; 2-10 keV) with a high absorption column (NH3.3(1)e23 cm^-2) and a hard power law spectrum of index 0.5(1). A strong flux modulation with a period of 5860(50)s and PTP pulse fraction of 63(6)% (2-10 keV) is clearly visible in the x-ray data. The only NS systems known with similar spin periods are low luminosity persistent wind-fed pulsars; if this is a spin period, IGR J16358-4726 is a new kind of object. If this is an orbital period, then the system could be a compact LMXB. We request observations with XMM of IGR J16358-4726 to place constraints to the nature of this enigmatic transient.

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