A dataset provided by the European Space Agency

Proposal ID 020450
Title DETERMINING THE NATURE OF THE PECULIAR X-RAY TRANSIENT IGR J16358-4726
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0204500201
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0204500301
DOI https://doi.org/10.5270/esa-qepz8rn
Principal Investigator, PI Dr SANDEEP K. PATEL
Abstract The transient IGR J16358-4726 was discovered on 2003 March 19 by INTEGRAL. OurMarch 24th CXO observation detected the transient at the 1.7e-10 erg cm^-2 s^-1flux level (unabs; 2-10 keV) with a high absorption column (NH=3.3(1)e23 cm^-2)and a hard power law spectrum of index 0.5(1). A strong flux modulation with aperiod of 5860(50)s and PTP pulse fraction of 63(6)% (2-10 keV) is clearlyvisible in the x-ray data. The only NS systems known with similar spin periodsare low luminosity persistent wind-fed pulsars; if this is a spin period, IGRJ16358-4726 is a new kind of object. If this is an orbital period, then thesystem could be a compact LMXB. We request observations with XMM of IGRJ16358-4726 to place constraints to the nature of this enigmatic transient.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-02-16T14:10:13Z/2004-09-05T03:09:05Z
Version 17.56_20190403_1200
Mission Description The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2005-09-26T00:00:00Z
Keywords "ptp pulse fraction", "31e23 cm", "absorption column nh", "xray data", "enigmatic transient", "XMM", "erg cm", "spin periods", "spin period", "flux modulation", "compact lmxb", "ns systems", "24th cxo", "igr j16358 4726", "orbital period", "flux level unabs"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr SANDEEP K. PATEL, 2005, 'DETERMINING THE NATURE OF THE PECULIAR X-RAY TRANSIENT IGR J16358-4726', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-qepz8rn