A Possible Magnetar Nature for IGR J16358-4726

Abstract

We present detailed spectral and timing analysis of the hard x-ray transient IGR J16358-4726 using multi-satellite archival observations. A study of the source flux time history over 6 years, suggests that lower luminosity transient outbursts can be occuring in intervals of at most 1 year. Joint spectral fits of the higher luminosity outburst using simultaneous Chandra/ACIS and INTEGRAL/ISGRI data reveal a spectrum well described by an absorbed power law model with a high energy cut-off plus an Fe line. We detected the 1.6 hour pulsations initially reported using Chandra/ACIS also in the INTEGRAL/ISGRI light curve and in subsequent XMM-Newton observations. Using the INTEGRAL data we identified a spin up of 94 s (dP/dt = 1.6E-4), which strongly points to a neutron star nature for IGR J16358-4726. Assuming that the spin up is due to disc accretion, we estimate that the source magnetic field ranges between 10^13 - 10^15 G, depending on its distance, possibly supporting a magnetar nature for IGR J16358-4726.

Accepted for publication in ApJ, 34 pgs, 14 figures, 4 tables

References in corpus (18)

• On the Absorption of X-rays in the Interstellar Medium
• ISGRI: the INTEGRAL Soft Gamma-Ray Imager
• Observations of Accreting Pulsars
• The INTEGRAL Science Data Centre (ISDC)
• A Major SGR-like Outburst and Rotation Glitch in the No-Longer-So-Anomalous X-ray Pulsar 1E 2259+586
• Accretion Onto Fast X-Ray Pulsars
• INTEGRAL insight into the inner parts of the Galaxy. High mass X-ray binaries
• The INTEGRAL IBIS/ISGRI System Point Spread Function and Source Location Accuracy
• A Glitch in an Anomalous X-ray Pulsar
• A Frequency Glitch in an Accreting Pulsar
• Unraveling the cooling trend of the Soft Gamma Repeater, SGR 1627-41
• The Peculiar X-ray Transient IGR 16358-4726
• Observations of fourteen pulsar glitches
• Do magnetars glitch? : Timing irregularities in anomalous X-ray pulsars
• Pulse Profile Change Possibly Associated with a Glitch in an Anomalous X-Ray Pulsar 4U 0142+61
• RXTE observations of strongly absorbed sources IGR J16318-4848 and IGR J16358-4726
• GMRT observations of the field of INTEGRAL X-ray sources- I
• An absorbed view of a new class of INTEGRAL sources

Cited by in corpus (22)

• Are There Magnetars in High Mass X-ray Binaries? The Case of SuperGiant Fast X-Ray Transients
• Multi-wavelength observations of Galactic hard X-ray sources discovered by INTEGRAL. I. The nature of the companion star
• Evidence for an abundant old population of Galactic ultra long period magnetars and implications for fast radio bursts
• Chandra Localizations and Spectra of INTEGRAL Sources in the Galactic Plane
• Population Synthesis for Symbiotic X-ray Binaries
• Accreting magnetars: a new type of high-mass X-ray binaries?
• Wind-accreting Symbiotic X-ray Binaries
• Low-Mass X-ray Binaries
• Spectral and Timing Nature of the Symbiotic X-ray Binary 4U 1954+319: The Slowest Rotating Neutron Star in an X-ray Binary System
• K-band spectroscopy of IGR J16358-4726 and IGR J16393-4643: two new symbiotic X-ray binaries
• The peculiar Galactic center neutron star X-ray binary XMM J174457-2850.3
• Chandra observations of five INTEGRAL sources: new X-ray positions for IGR J16393-4643 and IGR J17091-3624
• The Galactic LMXB Population and the Galactic Centre Region
• Suzaku Observations of Four Heavily Absorbed HMXBs
• The 5 hr pulse period and broadband spectrum of the Symbiotic X-ray Binary 3A 1954+319
• An XMM-Newton and NuSTAR study of IGR J18214-1318: a non-pulsating high-mass X-ray binary with a neutron star
• Is CGCS 5926 a symbiotic X-ray binary?
• Confirmation of IGR J01363+6610 as a Be X-ray binary with very low quiescent X-ray luminosity
• Broadband Suzaku observations of IGR J16207-5129
• Representation Learning for Time-Domain High-Energy Astrophysics: Discovery of Extragalactic Fast X-ray Transient XRT 200515
• The puzzling symbiotic X-ray system 4U1700+24
• Drop in the hard pulsed fraction and a candidate cyclotron line in IGR J16320-4751 seen by NuSTAR