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In the beginning of 2023 the Be transient X-ray pulsar RX J0440.9+4431 underwent a fist-ever giant outburst observed from the source peaking in the beginning of February and reaching peak luminosity of $\sim 4.3\times10^{37}$ erg s$^{-1}$.…

We report on the serendipitous X-ray detection, using the Chandra X-ray Observatory, of the radio pulsar J1718-3718. This pulsar has one of the highest inferred surface dipole magnetic fields in the radio pulsar population (B = 7.4e13 G),…

天体物理学 · 物理学 2009-11-10 V. M. Kaspi , M. A. McLaughlin

We present an analysis of the Swift BAT and XRT data of GRB060602B, which is most likely an accreting neutron star in a binary system and not a gamma-ray burst. Our analysis shows that the BAT burst spectrum is consistent with a…

天体物理学 · 物理学 2016-03-02 Rudy Wijnands , Evert Rol , Ed M. Cackett , Rhaana L. C. Starling , Ron A. Remillard

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…

高能天体物理现象 · 物理学 2025-09-03 Sudip Bhattacharyya , Akshay Singh , Andrea Sanna

The fourth transient accreting millisecond pulsar XTE J1807-294 was observed during its February/March 2003 outburst by INTEGRAL, partly simultaneously with the XMM-Newton and RXTE satellites. We present here the first study of the 0.5-200…

We perform the first reflection study of the soft X-ray transient and Type 1 burst source XTE J1709-267 using NuSTAR observations during its 2016 June outburst. There was an increase in flux near the end of the observations, which…

高能天体物理现象 · 物理学 2017-04-05 R. M. Ludlam , J. M. Miller , E. C. Cackett , N. Degenaar , A. C. Bostrom

An outburst of the accreting X-ray millisecond pulsar SAX J1808.4-3658 in October-November 2002 was followed by the Rossi X-ray Timing Explorer for more than a month. We demonstrate how the area covered by the hotspot at the neutron star…

太阳与恒星天体物理 · 物理学 2010-02-20 Askar Ibragimov , Juri Poutanen

We report on the discovery of X-ray pulsations in the Be/X-ray binary IGR J21343+4738 during an XMM-Newton observation. We obtained a barycentric corrected pulse period of 320.35+-0.06 seconds. The pulse profile displays a peak at low…

高能天体物理现象 · 物理学 2015-06-19 P. Reig , A. Zezas

The origin of the high-frequency radio emission detected from several magnetars is poorly understood. In this paper, we report the ~40 GHz properties of SGR J1745-29 as measured using Jansky Very Large Array (JVLA) and Robert C. Byrd Green…

We present observational evidence for "propeller" effects in two X-ray pulsars, GX 1+4 and GROJ1744-28. Both sources were monitored regularly by the Rossi X-ray Timing Explorer (RXTE) throughout a decaying period in the X-ray brightness.…

天体物理学 · 物理学 2009-10-30 Wei Cui

XTE J1946+274 = GRO J1944+26 is a 15.8 s Be/X-ray pulsar discovered simultaneously in 1998 September with the Burst and Transient Source Experiment (BATSE) on the Compton Gamma Ray Observatory (CGRO) and the All-Sky Monitor (ASM) on the…

天体物理学 · 物理学 2009-11-07 Colleen. A. Wilson , Mark. H. Finger , M. J. Coe , Ignacio Negueruela

In this paper, we report on the available X-ray data collected by INTEGRAL, Swift, and XMM-Newton during the first outburst of the INTEGRAL transient IGR J17451-3022, discovered in 2014 August. The monitoring observations provided by the…

高能天体物理现象 · 物理学 2016-04-13 E. Bozzo , P. Pjanka , P. Romano , A. Papitto , C. Ferrigno , S. Motta , A. A. Zdziarski , F. Pintore , T. Di Salvo , L. Burderi , D. Lazzati , G. Ponti , L. Pavan

This study investigates the timing and spectral characteristics of X-ray bursts from the neutron star system EXO 0748-676 using the NuSTAR observatory's FPMA and FPMB instruments in the 3-79 keV range. We identify Type I X-ray bursts driven…

高能天体物理现象 · 物理学 2024-10-15 Nirpat Subba , Nishika Subba , Jyoti Paul , Pankaj Sharma , Monika Ghimiray

GRO J2058+42, a transient 198 second x-ray pulsar, was discovered by the Burst and Transient Source Experiment (BATSE) on the Compton Gamma-Ray Observatory (CGRO), during a "giant" outburst in 1995 September-October. The total flux peaked…

天体物理学 · 物理学 2019-08-17 Colleen A. Wilson , Mark H. Finger , B. Alan Harmon , Deepto Chakrabarty , Tod Strohmayer

IGR J18483-0311 is a poorly known transient hard X-ray source discovered by INTEGRAL during observations of the Galactic Center region performed between 23--28 April 2003. Aims: To detect new outbursts from IGR J18483-0311 using INTEGRAL…

天体物理学 · 物理学 2009-11-13 V. Sguera , A. B. Hill , A. J. Bird , A. J. Dean , A. Bazzano , P. Ubertini , N. Masetti , R. Landi , A. Malizia , D. J. Clark , M. Molina

The Fermi $\gamma$-ray source 1FGL J1417.7--4407 (J1417) is a compact X-ray binary with a neutron star primary and a red giant companion in a $\sim$5.4 day orbit. This initial conclusion, based on optical and X-ray data, was confirmed when…

XMM-Newton and Chandra observations of the transient 7.8 s pulsar XTE J1829-098 are used to characterize its pulse shape and spectrum, and to facilitate a search for an optical or infrared counterpart. In outburst, the absorbed, hard X-ray…

天体物理学 · 物理学 2009-11-13 J. P. Halpern , E. V. Gotthelf

We present the discovery of IGR J18245-2452, the first millisecond pulsar observed to swing between a rotation-powered, radio pulsar state, and an accretion-powered X-ray pulsar state (Papitto et al. 2013, Nature, 501, 517). This…

高能天体物理现象 · 物理学 2015-06-17 A. Papitto , C. Ferrigno , E. Bozzo , N. Rea

The source GS~1826-24 is a neutron star low mass X-ray binary known as the 'clocked burster' because of its extremely regular bursting behavior. We report on the detection of a long type-I X-ray burst from this source. We perform a detailed…

高能天体物理现象 · 物理学 2025-08-21 Aditya S. Mondal , Mayukh Pahari , Gulab C. Dewangan

We report the discovery of an eclipsing low-mass X-ray binary at the center of the 3FGL error ellipse of the unassociated Fermi/Large Area Telescope gamma-ray source 3FGL J0427.9-6704. Photometry from OGLE and the SMARTS 1.3-m telescope and…