L. M. Song
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View article: GRB 240715A: Revealing Novel Intrinsic Mechanism by Different Individual Pulse
GRB 240715A: Revealing Novel Intrinsic Mechanism by Different Individual Pulse Open
The Space-based multiband astronomical Variable Objects Monitor (SVOM), detected its first short gamma-ray burst, GRB 240715A, in-flight, which was jointly observed by Fermi. Based on observational data of SVOM/GRM and Fermi/GBM, we perfor…
View article: An Insight-HXMT View of the Evolution of the Type-C Quasiperiodic Oscillation during the Flaring State of Swift J1727.8–1613
An Insight-HXMT View of the Evolution of the Type-C Quasiperiodic Oscillation during the Flaring State of Swift J1727.8–1613 Open
We present a detailed analysis of the evolution of type-C quasiperiodic oscillations (QPOs) observed during the flaring state of the recently discovered black hole X-ray binary Swift J1727.8–1613, utilizing data from the Insight Hard X-ray…
View article: Unveil a Peculiar Light-curve Pattern of Magnetar Burst with GECAM Observations of SGR J1935+2154
Unveil a Peculiar Light-curve Pattern of Magnetar Burst with GECAM Observations of SGR J1935+2154 Open
A magnetar X-ray burst (MXB) is usually composed of a single pulse or multiple pulses with rapid rise and brief duration mostly observed in the hard X-ray (soft gamma-ray) band. Previous work studied the temporal behavior of some magnetar …
View article: BREAKFAST: A Framework for general joint BA duty and follow-up guidance of multiple $γ$-ray monitors
BREAKFAST: A Framework for general joint BA duty and follow-up guidance of multiple $γ$-ray monitors Open
With the growing number of gamma-ray monitors in operation, several research teams have adopted a strategy of joint operation and scientific duty to improve efficiency. A successful example is the GECAM-HXMT-SVOM (GHS) constellation collab…
View article: Fabrication of Low-Temperature ppb-Level Ethanol Gas Sensor Based on Hierarchical NiO-SnO2 Nanoflowers Under Hydrothermal Conditions
Fabrication of Low-Temperature ppb-Level Ethanol Gas Sensor Based on Hierarchical NiO-SnO2 Nanoflowers Under Hydrothermal Conditions Open
Hierarchical NiO-SnO2 nanoflowers were prepared via a one-step hydrothermal method. The morphology, structure and components of the hierarchical NiO-SnO2 nanoflowers were examined via scanning electron microscopy (SEM), transmission electr…
View article: Characteristics and Modeling of the In-flight Instrumental Background of FXT Onboard Einstein Probe
Characteristics and Modeling of the In-flight Instrumental Background of FXT Onboard Einstein Probe Open
The in-flight instrumental background of the Follow-up X-ray Telescope (FXT) onboard Einstein Probe mission is analysed in this work by utilizing observations collected during the performance verification phase and subsequent dedicated fil…
View article: Spectral Energy Correlations of Gamma-Ray Bursts from Structured Jets
Spectral Energy Correlations of Gamma-Ray Bursts from Structured Jets Open
Using 148 out-axis gamma-ray bursts (GRBs), we build their spectrum–energy relations of peak energy versus isotropic energy, peak energy versus peak luminosity, and peak energy versus jet-calibrated energy, which are corrected for a struct…
View article: Timing and Spectral Studies of SRGA J144459.2−604207 with NICER, Einstein Probe, IXPE, NuSTAR, Insight-HXMT, and INTEGRAL During its 2024 Outburst
Timing and Spectral Studies of SRGA J144459.2−604207 with NICER, Einstein Probe, IXPE, NuSTAR, Insight-HXMT, and INTEGRAL During its 2024 Outburst Open
SRGA J144459.2−604207 is a newly confirmed accreting millisecond X-ray pulsar and type I X-ray burster. We present the broadband X-ray timing and spectral behaviors of SRGA J144459.2−604207 during its 2024 outburst. The data were collected…
View article: Extending the Short Gamma-Ray Burst Population from Subthreshold Triggers in Fermi/GBM and GECAM Data and Its Implications
Extending the Short Gamma-Ray Burst Population from Subthreshold Triggers in Fermi/GBM and GECAM Data and Its Implications Open
Detection of short gamma-ray bursts (SGRBs) is critically important for the research of compact object mergers and multimessenger astrophysics, but a significant part of SGRBs fall below the trigger threshold of GRB detectors, and thus are…
View article: Measurement of Neutral Atmosphere Density during the Years of Increasing Solar Activity Using Insight-HXMT Data with the Earth Occultation Technique
Measurement of Neutral Atmosphere Density during the Years of Increasing Solar Activity Using Insight-HXMT Data with the Earth Occultation Technique Open
The density of the Earth’s middle and upper atmosphere is an important parameter in Earth science and plays a critical role in the design, operation, and orbital determination of low Earth orbit spacecraft. In this study, we have employed …
View article: Cross-calibration of the energy response of the gamma-ray detectors on board GECAM-B
Cross-calibration of the energy response of the gamma-ray detectors on board GECAM-B Open
Context . The Gravitational-wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) was primarily designed to detect gamma-ray bursts (GRBs), particularly those associated with gravitational-wave events. The energy response of…
View article: Multi-instrument Search for Gamma-Ray Counterpart of X-Ray Transients Detected by EP/WXT
Multi-instrument Search for Gamma-Ray Counterpart of X-Ray Transients Detected by EP/WXT Open
As a soft X-ray imager with an unprecedentedly large field of view, Einstein Probe (EP)/Wide-field X-ray Telescope (WXT) has detected many (fast) X-ray transients, whose nature is very intriguing. Whether there is a gamma-ray counterpart f…
View article: Fast Transitions of X-Ray Variability in the Neutron Star Low-mass X-Ray Binary Cygnus X-2
Fast Transitions of X-Ray Variability in the Neutron Star Low-mass X-Ray Binary Cygnus X-2 Open
We present a spectral-timing analysis of two NICER observations of the weakly magnetized neutron star low-mass X-ray binary Cygnus X-2. During these observations, we detect a rapid transition from a narrow 50 Hz horizontal-branch oscillati…
View article: Insight-HXMT Observations of the Extremely Bright GRB 221009A
Insight-HXMT Observations of the Extremely Bright GRB 221009A Open
The Insight Hard X-ray Modulation Telescope (Insight-HXMT) detected GRB 221009A, the brightest gamma-ray burst (GRB) observed to date, with all its three telescopes, i.e., the High Energy (HE) telescope (20–250 keV), Medium Energy (ME) tel…
View article: Fast Transitions of X-ray Variability in the Neutron Star Low Mass X-ray Binary Cygnus X-2
Fast Transitions of X-ray Variability in the Neutron Star Low Mass X-ray Binary Cygnus X-2 Open
We present a spectral-timing analysis of two NICER observations of the weakly magnetized neutron star low-mass X-ray binary Cygnus X-2. During these observations, we detect a rapid transition from a narrow 50-Hz horizontal-branch oscillati…
View article: Multi-Instrument Search for Gamma-Ray Counterpart of X-ray Transients detected by EP/WXT
Multi-Instrument Search for Gamma-Ray Counterpart of X-ray Transients detected by EP/WXT Open
As a soft X-ray imager with unprecedentedly large field of view, EP/WXT has detected many (fast) X-ray transients, whose nature is very intriguing. Whether there is gamma-ray counterpart for the X-ray transient provides important implicati…
View article: The First Insight-HXMT Localization Catalog of Short-duration Gamma-Ray Bursts: The First Six Years
The First Insight-HXMT Localization Catalog of Short-duration Gamma-Ray Bursts: The First Six Years Open
As of 2023 December, the high-energy telescope (HE) of Insight-HXMT has detected 72 short-duration gamma-ray bursts (sGRBs), which may be related to binary compact star mergers. In this work, we locate these sGRBs by adopting an enhanced t…
View article: Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst Jet
Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst Jet Open
The second brightest gamma-ray burst (GRB) in history, GRB 230307A, provides an ideal laboratory to study the mechanism of GRB prompt emission thanks to its extraordinarily high photon statistics and its single-episode activity. Here we de…
View article: Research on type synthesis of a new class of 2T1R uncoupled parallel mechanism with a suitable constraint branch
Research on type synthesis of a new class of 2T1R uncoupled parallel mechanism with a suitable constraint branch Open
Type synthesis is an essential building block for addressing the original innovation problems of mechanisms. The current paper presents a new class of 2T1R (two-translational and one-rotational) uncoupled parallel mechanisms (UPMs) with a …
View article: Insight-HXMT observations of the extremely bright GRB 221009A
Insight-HXMT observations of the extremely bright GRB 221009A Open
The Hard X-ray Modulation Telescope (\insight) detected GRB 221009A, the brightest gamma-ray burst observed to date, with all its three telescopes, i.e. High Energy telescope (HE, 20-250 keV), Medium Energy telescope (ME, 5-30 keV), and Lo…
View article: PSR J1231–1411 Revisited: Pulse Profile Analysis of X-Ray Observation
PSR J1231–1411 Revisited: Pulse Profile Analysis of X-Ray Observation Open
One of the primary goals of Neutron Star Interior Composition Explorer (NICER)-like X-ray missions is to impose stringent constraints on the neutron star equation of state by precisely measuring their masses and radii. NICER has recently e…
View article: Measurement of Neutral Atmosphere Density During the Years of Increasing Solar Activity Using \textit{Insight}-HXMT Data with the Earth Occultation Technique
Measurement of Neutral Atmosphere Density During the Years of Increasing Solar Activity Using \textit{Insight}-HXMT Data with the Earth Occultation Technique Open
The density of the Earth's middle and upper atmosphere is an important question in Earth science and is a critical factor in the design, operation, and orbital determination of low Earth orbit spacecraft. In this study, we employ the Earth…
View article: Energetic Transients Joint Analysis System for Multi-INstrument (ETJASMIN) for GECAM. II. Search, Verification, and Classification of Bursts
Energetic Transients Joint Analysis System for Multi-INstrument (ETJASMIN) for GECAM. II. Search, Verification, and Classification of Bursts Open
The Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is a dedicated mission consisting of multiple instruments on different spacecraft to monitor gamma-ray transients. To meet the requirement of GECAM, we …
View article: GECAM Observations of the Galactic Magnetar SGR J1935+2154 during the 2021 and 2022 Burst Active Episodes. I. Burst Catalog
GECAM Observations of the Galactic Magnetar SGR J1935+2154 during the 2021 and 2022 Burst Active Episodes. I. Burst Catalog Open
Magnetars are neutron stars with ultrahigh magnetic fields (~10 14 –10 15 G). The magnetar SGR J1935+2154 is not only one of the most active magnetars detected so far, but also the unique confirmed source of fast radio bursts. The Gravitat…
View article: A Comprehensive Study of Type I (Thermonuclear) Bursts in the New Transient SRGA J144459.2–604207
A Comprehensive Study of Type I (Thermonuclear) Bursts in the New Transient SRGA J144459.2–604207 Open
We report an analysis of Insight-HXMT observations of the newly discovered accreting millisecond pulsar SRGA J144459.2–604207. During the outburst, detected in 2024 February by SRG/ART-XC, the broadband persistent spectrum was well fitted …
View article: Anatomy-wise lung ventilation imaging for precise functional lung avoidance radiation therapy
Anatomy-wise lung ventilation imaging for precise functional lung avoidance radiation therapy Open
Objective. This study aimed to propose a method for obtaining anatomy-wise lung ventilation image (VI aw ) that enables functional assessment of lung parenchyma and tumor-blocked pulmonary segments. The VI aw was used to define multiple fu…
View article: Prognostic value of intraductal carcinoma subtypes and postoperative radiotherapy for localized prostate cancer
Prognostic value of intraductal carcinoma subtypes and postoperative radiotherapy for localized prostate cancer Open
Patients suffering from localized prostate cancer with IDC-P(+), especially IDC-P pattern 2, are more susceptible to biochemical recurrence and death after radical prostatectomy. While postoperative radiotherapy can alleviate the negative …
View article: Magnetar emergence in a peculiar gamma-ray burst from a compact star merger
Magnetar emergence in a peculiar gamma-ray burst from a compact star merger Open
The central engine that powers gamma-ray bursts (GRBs), the most powerful explosions in the universe, is still not identified. Besides hyper-accreting black holes, rapidly spinning and highly magnetized neutron stars, known as millisecond …
View article: The GECAM ground search system for gamma-ray transients
The GECAM ground search system for gamma-ray transients Open
View article: Extragalactic fast X-ray transient from a weak relativistic jet associated with a Type Ic-BL supernova
Extragalactic fast X-ray transient from a weak relativistic jet associated with a Type Ic-BL supernova Open
Massive stars end their life as core-collapse supernovae, amongst which some extremes are Type Ic broad-lined supernovae associated with long-duration gamma-ray bursts (LGRBs) having powerful relativistic jets. Their less-extreme brethren …