-
Article
Observation of spectral lines in the exceptional GRB 221009A
As the brightest gamma-ray burst ever observed, GRB 221009A provided a precious opportunity to explore spectral line features. In this article, we performed a comprehensive spectroscopy analysis of GRB 221009A...
-
Article
The performance of out-of-time events of the follow-up X-ray telescope onboard Einstein probe
The purpose of this study is to investigate the performance of out-of-time events (OoT events) in the Follow-up X-ray Telescope (FXT) onboard the Einstein Probe. The OoT events, registered on the PN-CCD during...
-
Article
Insight-HXMT on-orbit thermal control status and thermal deformation impact analysis
The Hard X-ray Modulation Telescope is China’s first X-ray astronomy satellite launched on June 15, 2017, dubbed Insight-HXMT. Active and passive thermal control measures are employed to keep devices at suitable ...
-
Article
Paired quasi-periodic pulsations of hard X-ray emission in a solar flare
We investigate high time resolution data obtained by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) during the flare event on 2022 April 21 at 01:52 UT. Several subpeaks...
-
Article
In-orbit performance of HE onboard Insight-HXMT in the first 5 years
The high-energy X-ray telescope (HE), one of the three main payloads of the Insight-HXMT mission, is composed of eighteen NaI(Tl)/CsI(Na) phoswich detectors, where NaI(Tl) serves as the primary detector covering ...
-
Article
Long-term evolution of the X-ray flux of the Crab pulsar
In order to carry out in-orbit calibration, the hard X-ray modulation telescope satellite (HXMT) has made a number of observations of Crab pulsar. We study the long-term evolution of the X-ray flux of the Crab...
-
Article
Five-year in-orbit background of Insight-HXMT
We present the five-year in-orbit background evolution of Insight-HXMT since the launch, as well as the effects of the background model in data analysis.
-
Article
Discovery of oscillations above 200 keV in a black hole X-ray binary with Insight-HXMT
Low-frequency quasiperiodic oscillations (LFQPOs) are commonly found in black hole X-ray binaries, and their origin is still under debate. The properties of LFQPOs at high energies (above 30 keV) are closely r...
-
Article
Detailed polarization measurements of the prompt emission of five gamma-ray bursts
Gamma-ray bursts (GRBs) are the strongest explosions in the Universe since the Big Bang. They are believed to be produced either in the formation of black holes at the end of massive star evolution1–3 or the merg...
-
Article
Simulation of the in-flight background for HXMT/HE
The Hard X-ray Modulation Telescope (HXMT) is a broad-band X-ray astronomical satellite from 1 to 250 keV. Understanding the X-ray background in detail will help to achieve a good performance of the instrument...
-
Article
A systematic study on energy dependence of quasi-periodic oscillation frequency in GRS 1915+105
Systematically studying all the RXTE/PCA observations for GRS 1915+105 before November 2010, we have discovered three additional patterns in the relation between Quasi-Periodic Oscillation (QPO) frequency and pho...
-
Article
Rms–flux relation of Cyg X-1 with RXTE: dip** and nondip** cases
The rms (root mean square) variability is the parameter for understanding the emission temporal properties of X-ray binaries (XRBs) and active galactic nuclei (AGN). The rms–flux relation with Rossi X-ray Timing...
-
Article
The Prompt Ultraviolet/Soft X-ray Emission of GRBs
We discuss the prompt emission of gamma-ray bursts (GRBs), allowing for γγ pair production and synchrotron self-absorption. The observed hard spectra suggest heavy pair-loading in GRBs. The re-emission of the ...
-
Chapter
The Prompt Ultraviolet/Soft X-Ray Emission of GRBs
We discuss the prompt emission of gamma-ray bursts (GRBs), allowing for γγ pair production and synchrotron self-absorption. The observed hard spectra suggest heavy pair-loading in GRBs. The re-emission of the gen...
-
Chapter and Conference Paper
Characteristic Variability Time Scales of Long Gamma-Ray Bursts
We determine the characteristic variability time scales for 410 bright long GRBs by locating the maximums of their Power Density Spectra (PDSs) defined and calculated in the time domain. The averaged character...
