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200 papers

I review the rotation measurements of accreting neutron stars. Many of the highly magnetic accreting X-ray pulsars have been continuously observed with the Burst and Transient Source Experiment (BATSE) aboard the Compton Gamma-Ray…

Astrophysics · Physics 2009-10-30 Lars Bildsten

We report the quasi-simultaneous INTEGRAL, SWIFT, and NuSTAR observations showing spectral state transitions in the neutron star low mass X-ray binary 1RXS J180408.9-342058 during its 2015 outburst. We present results of the analysis of…

High Energy Astrophysical Phenomena · Physics 2020-01-08 M. Fiocchi , A. Bazzano , G. Bruni , R. Ludlam , L. Natalucci , F. Onori , P. Ubertini

Type I X-ray bursts are thermonuclear explosions on the surface of accreting neutron stars. Hydrogen rich X-ray bursts burn protons far from the line of stability and can release energy in the form of neutrinos from $\beta$-decays. We have…

High Energy Astrophysical Phenomena · Physics 2019-01-16 Adelle J. Goodwin , Alexander Heger , Duncan K. Galloway

We examine the energy-resolved pulse profiles of 51 flux oscillations observed during the decline of thermonuclear X-ray bursts from accreting weakly- magnetized neutron stars with the Rossi X-ray Timing Explorer. We find that the…

Astrophysics · Physics 2009-11-07 Michael P. Muno , Feryal Ozel , Deepto Chakrabarty

We report the detection of 5 Type-1 thermonuclear X-ray bursts and one burst-like event in the neutron star LMXB source, Cyg X-2 using X-ray data obtained with the Large Area X-ray Proportional Counter (LAXPC) instrument on board AstroSat.…

High Energy Astrophysical Phenomena · Physics 2020-09-09 Jincy Devasia , Gayathri Raman , Biswajit Paul

We report the discovery of Type I (thermonuclear) X-ray bursts from the transient source XMMU J181227.8-181234 = XTE J1812-182. We found 7 X-ray bursts in Rossi X-ray Timing Explorer observations during the 2008 outburst, confirming the…

High Energy Astrophysical Phenomena · Physics 2019-05-01 A. J. Goodwin , D. K. Galloway , J. J. M. in 't Zand , E. Kuulkers , A. Bilous , L. Keek

During thermonuclear bursts, it is suspected that {\bf the cooling of the corona by the burst emission} may be the cause of hard X-ray {\bf deficits}. Although this {\bf deficit} has been observed in nine sources, it has not been observed…

High Energy Astrophysical Phenomena · Physics 2025-02-28 Y. P. Chen , S. Zhang , L. Ji , S. N. Zhang , J. Q. Peng , L. D. Kong , Z. Chang , Q. C. Shui , L. Tao , J. L. Qu , M. Y. Ge , J. Li

We report on a study of the evolution of burst oscillation properties during the rising phase of X-ray bursts from 4U 1636--536 observed with the proportional counter array (PCA) onboard the Rossi X-Ray Timing Explorer (RXTE). We present…

Astrophysics · Physics 2009-11-13 Sudip Bhattacharyya , Tod E. Strohmayer

A type-I burst could influence the accretion process through radiation pressure and Comptonization both for the accretion disk and the corona/boundary layer of an X-ray binary, and vice versa. We investigate the temporal evolution of a…

High Energy Astrophysical Phenomena · Physics 2022-09-07 Yu-Peng Chen , Shu Zhang , Long Ji , Shuang-Nan Zhang , Ling-Da Kong , Peng-Ju Wang , Zhi Chang , Jing-Qiang Peng , Jian Li , Jin-Lu Qu

X-ray bursts are thermonuclear flashes on the surface of accreting neutron stars and reliable burst models are needed to interpret observations in terms of properties of the neutron star and the binary system. We investigate the dependence…

High Energy Astrophysical Phenomena · Physics 2016-10-19 R. H. Cyburt , A. M. Amthor , A. Heger , E. Johnson , L. Keek , Z. Meisel , H. Schatz , K. Smith

The low-mass X-ray binary GS 1826-238 is presently unique for its consistently regular bursting behavior. In previous Rossi X-Ray Timing Explorer (RXTE) measurements between 1997 November and 2002 July, this source exhibited (nearly)…

Astrophysics · Physics 2009-11-13 Thomas W. J. Thompson , Duncan K. Galloway , Richard E. Rothschild , Lee Homer

We report the serendipitous detection with the Rossi X-ray Timing Explorer of a long and peculiar X-ray burst whose localization is consistent with one known X-ray burster (GRS 1747-312) and which occurred when that source was otherwise…

Astrophysics · Physics 2009-11-10 J. J. M. in 't Zand , T. E. Strohmayer , C. B. Markwardt , J. Swank

We perform a comprehensive study of thermonuclear bursts from the neutron star low-mass X-ray binary 4U 1702-429 detected with NICER and XMM-Newton. The thermonuclear burst detected with NICER shows clear evidence of a photospheric radius…

High Energy Astrophysical Phenomena · Physics 2025-08-19 Manoj Mandal , Sachindra Naik , Gaurava Kumar Jaisawal

Type-I X-ray bursts are recurring thermonuclear explosions on the surface of accreting neutron stars. Matching observed bursts to computational models can help to constrain system properties, such as the neutron star mass and radius,…

High Energy Astrophysical Phenomena · Physics 2020-04-29 Zac Johnston , Alexander Heger , Duncan K. Galloway

Accreting millisecond X-ray pulsars (AMXPs) show burst oscillations during thermonuclear explosions of the accreted plasma which are markedly different from those observed in non-pulsating low mass X-ray binaries. The AMXP XTE J1814-338 is…

High Energy Astrophysical Phenomena · Physics 2021-12-15 Yuri Cavecchi , Alessandro Patruno

We construct a two-zone model to describe H and He burning on the surface of an accreting neutron star and use it to study the triggering of type I X-ray bursts. Although highly simplified, the model reproduces all of the bursting regimes…

Astrophysics · Physics 2011-02-11 Randall L. Cooper , Ramesh Narayan

We report on the long term stability of the millisecond oscillations observed with the Rossi X-ray Timing Explorer (RXTE) during thermonuclear X-ray bursts from the low mass X-ray binaries (LMXB) 4U 1728-34 and 4U 1636-53. We show that…

Astrophysics · Physics 2009-10-30 Tod E. Strohmayer , William Zhang , Jean H. Swank , Iosif Lapidus

The temperature in the crust of an accreting neutron star, which comprises its outermost kilometer, is set by heating from nuclear reactions at large densities, neutrino cooling, and heat transport from the interior. The heated crust has…

Multi-zone models of Type I X-ray bursts are presented that use an adaptive nuclear reaction network of unprecedented size, up to 1300 isotopes. Sequences of up to 15 bursts are followed for two choices of accretion rate and metallicity. At…

Type-I X-ray bursts observed from neutron stars originate from intermittent unstable thermonuclear burning of accreted matter on these stars. Such bursts, particularly those reaching the Eddington luminosity and having a temporary…

High Energy Astrophysical Phenomena · Physics 2025-09-03 Sudip Bhattacharyya , Akshay Singh , Andrea Sanna