The 2008 May burst activation of SGR 1627–41

Esposito, P.; Israel, G. L.; Zane, S.; Senziani, F.; Starling, R. L. C.; Rea, N.; Palmer, D. M.; Gehrels, N.; Tiengo, A.; Luca, A. De; Götz, D.; Mereghetti, S.; Romano, P.; Sakamoto, T.; Barthelmy, S. D.; Stella, L.; Turolla, R.; Feroci, M.; Mangano, V.

doi:10.1111/j.1745-3933.2008.00530.x

Cited by 59 publications

(83 citation statements)

References 29 publications

(59 reference statements)

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“…Given the very large field of view (the entire unocculted sky) of GBM, this is the largest uniform sample of temporal and spectral properties of SGR J1550−5418 bursts during the January activation. This data set enables us to determine their durations, spectral shapes, and energetics, and compare them with other magnetar sources during similar high bursting activity periods: SGR 1900+14 (Göǧüş et al 1999;Israel et al 2008), SGR 1806−20 (Göǧüş et al 2000), AXP 1E 2259+586 (Gavriil et al 2004), and SGR 1627−41 (Esposito et al 2008). We also compare our results with the analysis of bursts detected by Swift during the same time period (Scholz & Kaspi 2011), and discuss them in the framework of current theoretical models.…”

Section: Introductionmentioning

confidence: 75%

SGR J1550–5418 BURSTS DETECTED WITH THEFERMIGAMMA-RAY BURST MONITOR DURING ITS MOST PROLIFIC ACTIVITY

Horst

Kouveliotou

Gorgone

et al. 2012

ApJ

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118

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We have performed detailed temporal and time-integrated spectral analysis of 286 bursts from SGR J1550−5418 detected with the Fermi Gamma-ray Burst Monitor (GBM) in 2009 January, resulting in the largest uniform sample of temporal and spectral properties of SGR J1550−5418 bursts. We have used the combination of broadband and high time-resolution data provided with GBM to perform statistical studies for the source properties. We determine the durations, emission times, duty cycles, and rise times for all bursts, and find that they are typical of SGR bursts. We explore various models in our spectral analysis, and conclude that the spectra of SGR J1550−5418 bursts in the 8-200 keV band are equally well described by optically thin thermal bremsstrahlung (OTTB), a power law (PL) with an exponential cutoff (Comptonized model), and two blackbody (BB) functions (BB+BB). In the spectral fits with the Comptonized model, we find a mean PL index of −0.92, close to the OTTB index of −1. We show that there is an anti-correlation between the Comptonized E peak and the burst fluence and average flux. For the BB+BB fits, we find that the fluences and emission areas of the two BB functions are correlated. The low-temperature BB has an emission area comparable to the neutron star surface area, independent of the temperature, while the hightemperature BB has a much smaller area and shows an anti-correlation between emission area and temperature. We compare the properties of these bursts with bursts observed from other SGR sources during extreme activations, and discuss the implications of our results in the context of magnetar burst models.

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Section: Introductionmentioning

confidence: 75%

SGR J1550–5418 BURSTS DETECTED WITH THEFERMIGAMMA-RAY BURST MONITOR DURING ITS MOST PROLIFIC ACTIVITY

Horst

Kouveliotou

Gorgone

et al. 2012

ApJ

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118

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“…It has been suggested that this SGR is associated with the young SNR G337.0-0.1 in the CTB33 complex (Hurley et al 1999), shown in Figure 9. SGR1627-41 last went into outburst in 2008 (Esposito et al 2008), and it was found to have returned to quiescence by 2011 in NARCS observations . The cross-normalization constant from fitting the NuSTAR and Chandra spectra is consistent with 1.0 at 90% confidence, indicating that the magnetar persists in quiescence and has not significantly decreased in flux since 2011.…”

Section: Magnetarsmentioning

confidence: 99%

The NuSTAR Hard X-Ray Survey of the Norma Arm Region

Fornasini

Tomsick

Hong

et al. 2017

ApJS

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Citation for published item:pornsiniD prnes wF nd omsikD tohn eF nd rongD teu nd qotthelfD iri F nd fuerD prnz nd houiD prid nd ternD hniel nd fodgheeD ersh nd ghiuD tengEvun nd glvelD w¤ % nd gorrlEntnD tes¡ us nd rileyD ghrles tF nd urivonosD omn eF nd woriD uy nd elexnderD hvid wF nd frretD hidier nd foggsD teven iF nd ghristensenD pinn iF nd grigD illim F nd porsterD url nd qiommiD olo nd qrefenstetteD frin F nd rrrisonD pion eF nd rornstrupD elln nd uitguhiD ko nd uoglinD tF iF nd wdsenD uristin uF nd woD eter rF nd wiyskD riroms nd erriD wtteo nd ivovro'D wihel tF nd uettiD imonett nd nD ikrm nd estergrdD xiels tF nd hngD illim F @PHIUA 9he xue hrd Ery survey of the xorm rm regionF9D estrophysil journl supplement seriesFD PPW @PAF pF QQF Further information on publisher's website: Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractWe present a catalog of hard X-ray sources in a square-degree region surveyed by the Nuclear Spectroscopic Telescope Array (NuSTAR) in the direction of the Norma spiral arm. This survey has a total exposure time of 1.7 Ms, and the typical and maximum exposure depths are 50 ks and 1 Ms, respectively. In the area of deepest coverage, sensitivity limits of 5×10 −14 and 4×10 −14 ergs −1 cm −2 in the 3-10 and 10-20keV bands, respectively, are reached. Twenty-eight sources are firmly detected, and 10 are detected with low significance; 8 of the 38 sources are expected to be active galactic nuclei. The three brightest sources were previously identified as a low-mass X-ray binary, high-mass X-ray binary, and pulsar wind nebula. Based on their X-ray properties and multiwavelength counterparts, we identify the likely nature of the other sources as two colliding wind binaries, three pulsar wind nebulae, a black hole binary, and a plurality of cataclysmic variables (CVs). The CV candidates in the Norma region have plasma temperatures of ≈10-20keV, consistent with the Galactic ridge X-ray emission spectrum but lower than the temperatures of CVs near the Galactic center. This temperature difference may indicate that the Norma region has a lower fraction of intermediate polars relative to other types of CVs compared to the Galactic center. The NuSTAR logN-logS distribution in the 10-20keV band is consistent with the distribution measured by Chandra at 2-10keV if the average source spectrum is assumed to be a thermal model with kT≈15 keV, as observed for the CV candidates.

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“…In quiescence, luminosities as low as ∼ 10 31 erg s −1 have been observed. The outburst duty cycle of transient AXPs/SGRs is still poorly known: multiple out-bursts have been observed only in SGR 1627−41 and 1E 1547.0−5408 [46,11].…”

Section: Observational Propertiesmentioning

confidence: 99%

Pulsars and Magnetars

Mereghetti

2013

Braz J Phys

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The high-energy sources known as anomalous X-ray pulsars (AXPs) and soft γ-ray repeaters (SGRs) are well explained as magnetars: isolated neutron stars powered by their own magnetic energy. After explaining why it is generally believed that the traditional energy sources at work in other neutron stars (accretion, rotation, residual heat) cannot power the emission of AXPs/SGRs, I review the observational properties of the twenty AXPs/SGRs currently known and describe the main features of the magnetar model. In the last part of this review I discuss the recent discovery of magnetars with low external dipole field and some of the relations between AXPs/SGRs and other classes of isolated neutron stars.

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The 2008 May burst activation of SGR 1627–41

Cited by 59 publications

References 29 publications

SGR J1550–5418 BURSTS DETECTED WITH THEFERMIGAMMA-RAY BURST MONITOR DURING ITS MOST PROLIFIC ACTIVITY

SGR J1550–5418 BURSTS DETECTED WITH THEFERMIGAMMA-RAY BURST MONITOR DURING ITS MOST PROLIFIC ACTIVITY

The NuSTAR Hard X-Ray Survey of the Norma Arm Region

Pulsars and Magnetars

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