1 citations · 1 across the 12 of their papers we have counts for
13 papers
22 Newly Identified Repeating Changing-look AGNs and Evidence for Extreme Broad-line Region Breathing
Litao Zhu, Zhongxiang Wang, Alok C. Gupta +5
Changing-look active galactic nuclei (CL AGNs) show the appearance or disappearance of broad emission lines on timescales of years. Among them, the repeating CL (RCL) AGNs may prov…
Multi-band optical photometric variability of the blazar OJ 287 from 2015 to 2025
Alok C. Gupta, Karan Dogra, Mark Kidger +101
We present the most densely sampled multi-band optical photometric observations of the peculiar BL Lacertae object OJ 287 from 2015 to 2025 with a focus on its optical activity on…
Possible High-Energy Neutrino Emission from Dark Matter Annihilation in the Disrupting Dwarf Galaxy Boötes~III
Shunhao Ji, Zhongxiang Wang
We report the first search for high-energy neutrino emissions from dark matter (DM) annihilation in stellar-stream cores. Motivated by a recent gamma-ray study that proposed these…
Extreme color-magnitude variability: connection to changing-look AGNs
Litao Zhu, Zhongxiang Wang, Alok C. Gupta +5
Context. Changing-look active galactic nuclei (CL-AGNs) challenge the unified model of AGNs and offer key insights into the physics of the accretion processes of super-massive blac…
High-energy neutrino emission from the Type~IIn supernova SN~2017hcd
Shunhao Ji, Zhongxiang Wang, Litao Zhu +1
Neutrino astronomy provides another window to exploring the Universe, exemplified by the detection of a megaelectronvolt neutrino burst from the core-collapse supernova (CCSN) SN~1…
An extragalactic gamma-ray binary formed in supernova 2022jli
Pengfei Zhang, Zhongxiang Wang, Shunhao Ji
On May 5 2022, a type Ic supernova (SN) explosion SN~2022jli was discovered. This SN showed additional optical emissions, which were found to exhibit 12.4-day periodic undulations…
A Disk-Originated 329-day Quasi-Periodic Oscillation in the Seyfert 1 Galaxy J1626+5120
Litao Zhu, Zhongxiang Wang, Dong Zheng +2
The Seyfert 1 galaxy J1626+5120 is estimated to host a black hole (BH) accreting at Eddington ratio . Its long-term multi-band…
AT2022sxl: A Candidate Repeating Tidal Disruption Event in Possible Association with Two High-Energy Neutrino Events
Shunhao Ji, Zhongxiang Wang, Litao Zhu +2
We report a candidate repeating tidal disruption event (TDE), AT2022sxl, found from large-field optical survey data. Two flares with a separation time of 7.2\,yr between the…
Possible Neutrino Emission from the Pulsar Wind Nebula G63.7+1.1
Shunhao Ji, Zhongxiang Wang, Dong Zheng +1
We report on our finding of an excess of neutrinos at the location of the pulsar wind nebula (PWN) G63.7+1.1. By analyzing the IceCube track-like neutrino data for…
PKS~2332017 and PMN J19161519: Candidate Blazar Counterparts to Two High-energy Neutrino Events
Shunhao Ji, Zhongxiang Wang, Dong Zheng
We report our counterpart identification study for two high-energy neutrino events IC-130127A and IC-131204A listed in the IceCube Event Catalog of Alert Tracks. These two events b…
Revisiting Gamma-Ray Emission of the Supernova Remnant RCW 103
Yi Xing, Zhongxiang Wang, Dong Zheng
We analyze more than 15 years of the \gr\ data, obtained with the Large Area Telescope (LAT) onboard {\it the Fermi Gamma-ray Space Telescope (Fermi)}, for the region of the young…
X-ray polarimetric features of Gamma-ray Bursts across varied redshifts and hints for Axion-Like-Particles
Qingxiang Zhang, Feng Huang, Zhongxiang Wang +1
Polarimetric features during the prompt phase of Gamma-ray Bursts (GRBs) have been essential for elucidating the debated emission mechanisms and gaining insight into the inner stru…
Finding Candidate TeV Halos among Very-High Energy Sources
Dong Zheng, Zhongxiang Wang
We search for possible pulsar TeV halos among the very-high-energy (VHE) sources reported in different VHE surveys, among which in particular we use the results from the first Larg…