Bobing Wu
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View article: GRB 240715A: Revealing a Novel Intrinsic Mechanism by Different Individual Pulses
GRB 240715A: Revealing a Novel Intrinsic Mechanism by Different Individual Pulses Open
The Space-based multiband astronomical Variable Objects Monitor (SVOM) detected its first short gamma-ray burst (GRB), GRB 240715A, in flight, which was jointly observed by Fermi. Based on observational data of SVOM/GRM and Fermi/GBM, we p…
View article: Search for Type IL Gamma-Ray Bursts: Criterion, Results, Verification, and Physical Implication
Search for Type IL Gamma-Ray Bursts: Criterion, Results, Verification, and Physical Implication Open
As an interesting subclass of gamma-ray bursts (GRBs), Type IL GRBs (such as GRB 211211A and GRB 230307A) features a long-duration prompt emission but originating from a compact binary merger. The “long duration” emission of Type IL GRBs a…
View article: Evolution of the Three Spectral Components in the Prompt Emission of GRB 240825A
Evolution of the Three Spectral Components in the Prompt Emission of GRB 240825A Open
The prompt emission of gamma-ray bursts (GRBs) could be composed of different spectral components, such as a dominant nonthermal Band component in the keV–MeV range, a subdominant quasi-thermal component, and an additional hard nonthermal …
View article: Search for Type IL Gamma-ray Bursts: Criterion, Results, Verification and Physical Implication
Search for Type IL Gamma-ray Bursts: Criterion, Results, Verification and Physical Implication Open
As an interesting subclass of gamma-ray burst (GRB), Type IL GRB (such as GRB 211211A and GRB 230307A) features a long-duration prompt emission but originating from compact binary merger. The "long duration" emisison of Type IL GRB are dom…
View article: Evolution of the Three Spectral Components in the Prompt Emission of GRB 240825A
Evolution of the Three Spectral Components in the Prompt Emission of GRB 240825A Open
The prompt emission of Gamma-Ray Bursts (GRBs) could be composed of different spectral components, such as a dominant non-thermal Band component in the keV-MeV range, a subdominant quasi-thermal component, and an additional hard non-therma…
View article: A Subclass of Gamma-Ray Burst Originating from Compact Binary Merger
A Subclass of Gamma-Ray Burst Originating from Compact Binary Merger Open
Type I gamma-ray bursts (GRBs) are believed to originate from compact binary mergers usually with a duration of main emission less than 2 s. However, recent observations of GRB 211211A and GRB 230307A indicate that some merger-origin GRBs …
View article: Characterization of a pnCCD-based Camera for Applications at the 100 m X-Ray Test Facility*
Characterization of a pnCCD-based Camera for Applications at the 100 m X-Ray Test Facility* Open
The 100 m long X-ray test facility (100XF for clarity) in Institute of High Energy Physics of CAS has been playing an increasingly important role in the X-ray astronomy field in China. 100XF has been contributing to the missions under deve…
View article: An Insight-HXMT View of the mHz Quasi-regular Modulation Phenomenon in the Black Hole X-Ray Binary 4U 1630–47
An Insight-HXMT View of the mHz Quasi-regular Modulation Phenomenon in the Black Hole X-Ray Binary 4U 1630–47 Open
Here we report the spectral-timing results of the black hole X-ray binary 4U 1630–47 during its 2021 outburst using observations from the Hard X-ray Modulation Telescope (Insight-HXMT). Type C quasi-periodic oscillations (QPOs) in ∼1.6–4.2…
View article: An Insight-HXMT view of the mHz quasi-regular modulation phenomenon in the black hole X-ray binary 4U 1630-47
An Insight-HXMT view of the mHz quasi-regular modulation phenomenon in the black hole X-ray binary 4U 1630-47 Open
Here we report the spectral-timing results of the black hole X-ray binary 4U 1630-47 during its 2021 outburst using observations from the Hard X-ray Modulation Telescope. Type-C quasi-periodic oscillations (QPOs) in 1.6--4.2 Hz and quasi-r…
View article: Evolution of Accretion Modes between Spectral States Inferred from Spectral and Timing Analysis of Cygnus X-1 with Insight-HXMT Observations
Evolution of Accretion Modes between Spectral States Inferred from Spectral and Timing Analysis of Cygnus X-1 with Insight-HXMT Observations Open
We execute a detailed spectral-timing study of Cygnus X-1 in the low/hard, intermediate, and high/soft states with observations from the Hard X-ray Modulation Telescope. The broadband energy spectra fit well with the “truncated disk model”…
View article: Quasi-periodic Oscillations of the X-Ray Burst from the Magnetar SGR J1935–2154 and Associated with the Fast Radio Burst FRB 200428
Quasi-periodic Oscillations of the X-Ray Burst from the Magnetar SGR J1935–2154 and Associated with the Fast Radio Burst FRB 200428 Open
The origin(s) and mechanism(s) of fast radio bursts (FRBs), which are short radio pulses from cosmological distances, have remained a major puzzle since their discovery. We report a strong quasi-periodic oscillation (QPO) of ∼40 Hz in the …
View article: The 2018 failed outburst of H 1743 – 322: <i>Insight-HXMT, NuSTAR</i>, and <i>NICER</i> views
The 2018 failed outburst of H 1743 – 322: <i>Insight-HXMT, NuSTAR</i>, and <i>NICER</i> views Open
We studied the 2018 outburst of the black hole transient H 1743 − 322 with a series of Insight-HXMT, NICER, and NuSTAR observations, covering the 1–120 keV band. With our broad-band X-ray spectral modelling, we confirm that the source rema…
View article: Gamma-ray polarimetry of the Crab pulsar observed by <i>POLAR</i>
Gamma-ray polarimetry of the Crab pulsar observed by <i>POLAR</i> Open
The X/gamma-ray polarimetry of the Crab pulsar/nebula is believed to hold crucial information on their emission models. In the past, several missions have shown evidence of polarized emission from the Crab. The significance of these measur…
View article: Search for gamma-ray bursts and gravitational wave electromagnetic counterparts with High Energy X-ray Telescope of <i>Insight</i>-HXMT
Search for gamma-ray bursts and gravitational wave electromagnetic counterparts with High Energy X-ray Telescope of <i>Insight</i>-HXMT Open
The High Energy (HE) X-ray telescope on board the Hard X-ray Modulation Telescope (Insight-HXMT) can serve as a wide field of view (FOV) gamma-ray monitor with high time resolution (μs) and large effective area (up to thousands cm2). We de…
View article: 40 Years of Space Astronomy in China
40 Years of Space Astronomy in China Open
In the past 40 years, Chinas space astronomy has achieved tremendous development. Especially in the past 10 years, several astronomical satellites have been launched, and several astronomical satellites will be launched in the next few yea…
View article: 40 Years of Space Astronomy in China
40 Years of Space Astronomy in China Open
摘要: 过去40年中国空间天文学研究取得了巨大的发展.尤其是近10年内发射了数颗天文卫星，未来几年还将有一些天文卫星计划发射.本文简要回顾了国际空间天文学的发展历程.对中国空间天文学过去40年的发展进行了回顾和总结，包括1970年代第一颗天文卫星计划、气球空间天文探测、基于载人航天工程的空间天文实验以及天文卫星等.此外，介绍了中国空间天文项目，并对未来10年中国空间天文学研究进行了展望. 关键词: 空间天文 / 天文卫星
View article: The POLAR gamma-ray burst polarization catalog
The POLAR gamma-ray burst polarization catalog Open
Context. Despite over 50 years of research, many open questions remain about the origin and nature of gamma-ray bursts (GRBs). Linear polarization measurements of the prompt emission of these extreme phenomena have long been thought to be …
View article: Insight-HXMT observations of Swift J0243.6+6124: the evolution of RMS pulse fractions at super-Eddington luminosity
Insight-HXMT observations of Swift J0243.6+6124: the evolution of RMS pulse fractions at super-Eddington luminosity Open
Based on Insight-HXMT data, we report on the pulse fraction evolution during the 2017–2018 outburst of the newly discovered first Galactic ultraluminous X-ray (ULX) source Swift J0243.6+6124. The pulse fractions of 19 observation pairs sel…
View article: Insight-HXMT insight into switch of the accretion mode: the case of the X-ray pulsar 4U 1901+03
Insight-HXMT insight into switch of the accretion mode: the case of the X-ray pulsar 4U 1901+03 Open
We use the In data collected during the 2019 outburst from X-ray pulsar 4U 1901+03 to complement the orbital parameters reported by Fermi/GBM. Using the Insight-HXMT, we examine the correlation between the derivative of the intrinsic spin …
View article: Switches between accretion structures during flares in 4U 1901+03
Switches between accretion structures during flares in 4U 1901+03 Open
We report on our analysis of the 2019 outburst of the X-ray accreting pulsar 4U 1901+03 observed with Insight-HXMT and NICER. Both spectra and pulse profiles evolve significantly in the decaying phase of the outburst. Dozens of flares are …
View article: Hot disk of the Swift J0243.6+6124 revealed by Insight-HXMT
Hot disk of the Swift J0243.6+6124 revealed by Insight-HXMT Open
We report on analysis of observations of the bright transient X-ray pulsar Swift J0243.6+6124 obtained during its 2017-2018 giant outburst with Insight-HXMT, NuSTAR, and Swift observatories. We focus on the discovery of a sharp state trans…
View article: Insight-HXMT observation on 4U~1608--52: evolving spectral properties of a bright type-I X-ray burst
Insight-HXMT observation on 4U~1608--52: evolving spectral properties of a bright type-I X-ray burst Open
The evidences for the influence of thermonuclear (type-I) X-ray bursts upon the surrounding environments in neutron star low-mass X-ray binaries (LMXB) were detected previously via spectral and timing analyses. Benefitting from a broad ene…
View article: $Insight$-HXMT study of the timing properties of Sco X-1
$Insight$-HXMT study of the timing properties of Sco X-1 Open
We present a detailed timing study of the brightest persistent X-ray source Sco X-1 using the data collected by the Hard X-ray Modulation Telescope ($Insight$-HXMT) from July 2017 to August 2018. A complete $Z$-track hardness-intensity dia…
View article: Studies on the time response distribution of Insigh}-HXMT/LE
Studies on the time response distribution of Insigh}-HXMT/LE Open
The Hard X-ray Modulation Telescope (HXMT) named Insight is China's first X-ray astronomical satellite. The Low Energy X-ray Telescope (LE) is one of its main payloads onboard. The detectors of LE adopt swept charge device CCD236 with L-sh…
View article: Constant cyclotron line energy in Hercules X-1 -- Joint Insight-HXMT and NuSTAR observations
Constant cyclotron line energy in Hercules X-1 -- Joint Insight-HXMT and NuSTAR observations Open
The long-term evolution of the centroid energy of the CRSF in Her X-1 is still a mystery. We report a new measurement from a campaign between {\sl Insight}-HXMT and {\sl NuSTAR} performed in February 2018. Generally, the two satellites sho…
View article: Timing analysis of 2S 1417-624 observed with NICER and Insight-HXMT
Timing analysis of 2S 1417-624 observed with NICER and Insight-HXMT Open
We present a study of timing properties of the accreting pulsar 2S 1417-624 observed during its 2018 outburst, based on Swift/BAT, Fermi/GBM, Insight-HXMT and NICER observations. We report a dramatic change of the pulse profiles with lumin…