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MeV Gamma-Ray Lines from Radioactive Nuclei in Magnetar Giant Flares
Wu-Zimo Qiumu, Meng-Hua Chen, Qiu-Hong Chen +4
The rapid neutron-capture process (r-process) is widely regarded as the dominant mechanism responsible for the synthesis of heavy elements in the universe, yet its astrophysical si…
A high-energy neutrino flare associated with nearby bright interacting supernova SN 2021foa
Ming-Xuan Lu, Yun-Feng Liang, Xue-Rui Ouyang +3
While core-collapse supernovae have been widely discussed as potential neutrino sources, definitive observational evidence has remained elusive. In this work, we report evidence of…
X-ray Polarization and Spectral Variations in an Extreme High-Synchrotron-Peaked Blazar 1ES 1101--232
Xin-Ke Hu, Jin Zhang, Fei Xie +1
We present the first X-ray polarimetric observation of the extreme high-synchrotron-peaked blazar 1ES 1101--232, conducted by the Imaging X-ray Polarimetry Explorer (IXPE). The dat…
GRB 240825A: Early Reverse Shock and Its Physical Implications
Chao Wu, Yun Wang, Hua-Li Li +84
Early multiwavelength observations offer crucial insights into the nature of the relativistic jets responsible for gamma-ray bursts and their interaction with the surrounding mediu…
SN2023syz and SN2025cbj: Two Type IIn Supernovae Associated with IceCube High-energy Neutrinos
Ming-Xuan Lu, Yun-Feng Liang, Xiang-Gao Wang +1
Type IIn supernovae (SNe IIn) are a subclass of core-collapse SNe in which strong interactions occur between the ejecta and dense circumstellar material, creating ideal conditions…
GRB 170519A: Thermal Radiation in an X-ray Flare and Decaying Magnetic Fields for the Early-Time Afterglow
Zi-Min Zhou, Liang-Jun Chen, Rui-Quan Li +5
GRB 170519A was discovered by \emph{Swift}/BAT, and then observed by \emph{Swift}/XRT, \emph{Swift}/UVOT, and ground-based telescopes. We report Lick/KAIT observations of GRB 17051…
Investigating the Correlation between ZTF Tidal Disruption Events and IceCube High-energy Neutrinos
Ming-Xuan Lu, Yun-Feng Liang, Xiang-Gao Wang +1
Investigating the correlation between the TDE population and IceCube neutrinos could help us better understand whether TDEs could be potential high-energy neutrino emitters. In thi…
A Comprehensive Analysis of Insight-HXMT Gamma-Ray Burst Data. I. Power Density Spectrum
Zi-Min Zhou, Xiang-Gao Wang, En-Wei Liang +7
Power Density Spectrum (PDS) is one of the powerful tools to study light curves of gamma-ray bursts (GRBs). We show the average PDS and individual PDS analysis with {\it Hard X-ray…
Ultrahigh-Energy Gamma-ray Emission Associated with Black Hole-Jet Systems
The LHAASO Collaboration, Zhen Cao, Felix Aharonian +315
Black holes (BH), one of the most intriguing objects in the universe, can manifest themselves through electromagnetic radiation initiated by the accretion flow. Some stellar-mass B…
GRB 221009A/SN 2022xiw: A Supernova Obscured by a Gamma-Ray Burst Afterglow?
De-Feng Kong, Xiang-Gao Wang, WeiKang Zheng +10
We present optical photometry for the afterglow of GRB 221009A, in some respects the most extraordinary gamma-ray burst (GRB) ever observed. Good quality in the R-band light curve…
SN 2019tua : A Type IIb Supernova with Multiple Bumps in the Light Curves
Xin-Bo Huang, Xiang-Gao Wang, Long Li +9
We present photometric and spectroscopic observations and analysis of the type IIb supernova (SN) SN 2019tua, which exhibits multiple bumps in its declining light curves between 40…
Investigating the correlations between IceCube high-energy neutrinos and Fermi-LAT -ray observations. II
Ming-Xuan Lu, Yun-Feng Liang, Xuerui Ouyang +2
Given that gamma rays with energies larger than TeV are severely absorbed by background radiation fields, for many extragalactic sources, the GeV-TeV gamma-ray observations are the…
Multiwavelength Polarization Observations of Mrk 501
Xin-Ke Hu, Yu-Wei Yu, Jin Zhang +18
Mrk 501 is a prototypical high-synchrotron-peaked blazar (HBL) and serves as one of the primary targets for the {\it Imaging X-ray Polarimetry Explorer} ({\it IXPE}). In this study…
X-Ray Polarization Variability of High Spectral Peak BL Lacertaes: Cases of 1ES 1959+650 and PKS 2155-304
Xin-Ke Hu, Yu-Wei Yu, Jin Zhang +5
The high-energy-peaked BL Lacertae objects (HBLs) are the main targets of the Imaging X-ray Polarimetry Explorer (IXPE) for investigating the mechanisms of radiation and particle a…
Searching for Associations Between Short Gamma-ray Bursts and Fast Radio Burst
Ming-Xuan Lu, Long Li, Xiang-Gao Wang +4
The physical origin of fast radio bursts (FRBs) is still unclear. However, young magnetars associated with short-duration gamma-ray bursts (SGRBs) have been thought to be possible…
Prompt-to-afterglow transition of optical emission in a long gamma-ray burst consistent with a fireball
Liping Xin, Xuhui Han, Huali Li +19
Long gamma-ray bursts (GRBs), which signify the end-life collapsing of very massive stars, are produced by extremely relativistic jets colliding into circumstellar medium. Huge ene…
Application of Deep Learning Methods for Distinguishing Gamma-Ray Bursts from Fermi/GBM TTE Data
Peng Zhang, Bing Li, RenZhou Gui +10
To investigate GRBs in depth, it is crucial to develop an effective method for identifying GRBs accurately. Current criteria, e.g., onboard blind search, ground blind search, and t…
Detection of Quasi-periodic Oscillations in SGR 150228213
Run-Chao Chen, Can-Min Deng, Xiang-Gao Wang +5
The detection of quasi-periodic oscillations (QPOs) in magnetar giant flares (GFs) has brought a new perspective to study the mechanism of magnetar bursts. Due to the scarcity of G…
GRB 200829A: External Shock Origin of the Very Early Prompt Emission?
Jing Li, Da-Bin Lin, Rui-Jing Lu +6
Long-duration GRB~200829A was detected by Fermi-GBM and Swift-BAT/XRT, and then rapidly observed by other ground-based telescopes. It has a weak -ray emission in the very early…
Jets in a Gamma-Ray Burst During its Prompt Emission: Evolution of Lorentz Factor
Jing Li, Da-Bin Lin, Rui-Jing Lu +6
Knowledge about the Lorentz factor and its evolution of relativistic jets in gamma-ray bursts (GRBs) is crucial to understand their physics. An exact value of bulk Lorentz factor c…
Fermi Observations of GRB 220426A: a burst similar to GRB 090902B
Li-Tao Deng, Da-Bin Lin, Li Zhou +7
We report on a very bright, long-duration gamma-ray burst (GRB), GRB~220426A, observed by \emph{Fermi} satellite. GRB~220426A with total duration of ~s is composed with t…
The Lick Observatory Supernova Search follow-up program: photometry data release of 70 stripped-envelope supernovae
WeiKang Zheng, Benjamin E. Stahl, Thomas de Jaeger +85
We present BVRI and unfiltered Clear light curves of 70 stripped-envelope supernovae (SESNe), observed between 2003 and 2020, from the Lick Observatory Supernova Search (LOSS) foll…
GRB 211227A as a peculiar long gamma-ray burst from compact star merger
Hou-Jun Lü, Hao-Yu Yuan, Ting-Feng Yi +16
Long-duration gamma-ray bursts (GRBs) associated with supernovae (SNe) are believed to originate from massive star core-collapse events, whereas short-duration GRBs that are relate…
X-ray Flares Raising upon Magnetar Plateau as an Implication of a Surrounding Disk of Newborn Magnetized Neutron Star
Tian-Ci Zheng, Long Li, Le Zou +1
The X-ray flares have usually been ascribed to long-lasting activities of the central engine of gamma-ray bursts (GRBs), e.g., fallback accretion. The GRB X-ray plateaus, however,…