114 citations · 313 across the 23 of their papers we have counts for
23 papers
First Gamma-Ray Burst Observations with SVOM
F. Daigne, D. Turpin, J. -L. Atteia +34
Following its launch on 22 June 2024, the Space-based multi-band astronomical Variable Objects Monitor (SVOM) successfully completed its flight acceptance, commissioning, and scien…
OQ~208: A New Fe~II Changing-look Active Galactic Nucleus and Implications for the Nature of the Changing-look Phenomenon
J. Wang, W. K. Zheng, D. W. Xu +5
In addition to the traditional hydrogen Balmer emission lines, here we extend the optical changing-look (CL) phenomenon occurring in some active galactic nuclei (AGNs) to the optic…
The SVOM mission, its profile and its system
B. Cordier, J. Y. Wei, S. N. Zhang +37
The SVOM (Space-based Variable Objects Monitor) mission, launched into low Earth orbit on 22 June 2024, is a French-Chinese multi-wavelength observatory dedicated to the study of t…
XRF 241001A/SN 2024aiiq: A faint soft X-ray transient detected by SVOM with a broad-line type Ic supernova revealed by JWST
B. Schneider, M. Brunet, B. P. Gompertz +61
X-ray flashes (XRFs) are a type of gamma-ray burst (GRB) with prompt emission predominantly below 30 keV and have been poorly detected by previous missions. The advent of the SVOM…
Are "Changing-Look" Active Galactic Nuclei Special in the Coevolution of Supermassive Black Holes and their Hosts? II. The Case of Changing-Look Narrow-Line Seyfert 1 Galaxies
J. Wang, S. Jin, D. W. Xu +5
The evolutionary role of the so-called ``changing-look'' (CL) active galactic nucleus (AGN), which is characterized by spectral-type transitions within yr, has been sugges…
JWST reveals a supernova following a gamma-ray burst at z 7.3
A. J. Levan, B. Schneider, E. Le Floc'h +50
The majority of energetic long-duration gamma-ray bursts (GRBs) are thought to arise from the collapse of massive stars, making them powerful tracers of star formation across cosmi…
Picking-up Local GRB Candidates Based on Their Host Galaxies
J. Wang, Y. Xu, L. J. Chen +4
Rapid identification of candidates of high-value gamma-ray bursts (GRBs), including both high- and local events, is crucial for outlining subsequent observational strategy. In t…
Potential Chromospheric Evaporation in A M-dwarf's Flare Triggered by Einstein Probe Mission
J. Wang, X. Mao, C. Gao +12
Although flares from late-type main-sequence stars have been frequently detected in multi-wavelength, the associated dynamical process has been rarely reported so far. Here, we rep…
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…
Instability of Circumnuclear Gas Supply as An Origin of "Changing-look" Phenomenon of Supermassive Blackholes
J. Wang, D. W. Xu, Xinwu Cao +3
The origin of the "Changing-look" (CL) phenomenon in supermassive black holes (SMBHs) remains an open issue. This study aims to shed light on this phenomenon by focusing on a sampl…
Changing-look NLS1 galaxies, their detection with SVOM, and the case of NGC 1566
D. W. Xu, S. Komossa, D. Grupe +15
We discuss applications of the study of the new and barely explored class of changing-look (CL) narrow-line Seyfert 1 (NLS1) galaxies and comment on their detection with the space…
Are "Changing-Look'' Active Galactic Nuclei Special in the Coevolution of Supermassive Black Holes and their Hosts? I
J. Wang, W. K. Zheng, T. G. Brink +5
The nature of the so-called ``changing-look'' (CL) active galactic nucleus (AGN), which is characterized by spectral-type transitions within ~yr, remains an open question.…
Does Feedback from Supermassive Blackhole Co-evolve With Host In Type 2 Quasars?
S. Jin, J. Wang, M. Z. Kong +5
The feedback from accretion of central supermassive black holes (SMBHs) is a hot topic in the co-evolution of the SMBHs and their host galaxies. By tracing the large scale outflow…
Flaring-associated Complex Dynamics in Two M-dwarfs Revealed by Fast, Time-resolved Spectroscopy
J. Wang, H. L. Li, L. P. Xin +11
Habitability of an exoplanet is believed to be profoundly affected by activities of the host stars, although the related coronal mass ejections (CMEs) are still rarely detected in…
B3\,0749+460A: A New "Changing-Look" Active Galactic Nucleus Associated with X-ray Spectral Slope Variations
J. Wang, W. K. Zheng, D. W. Xu +5
Here we report an identification of B3\,0749+460A as a new double-peaked local "changing-look" active galactic nucleus (CL-AGN) in terms of our multi-epoch spectroscopic analysis.…
Constrains on optical emission of FAST-detected FRB 20181130B with GWAC synchronized observations
L. P. Xin, H. L. Li, J. Wang +17
Multi-wavelength simultaneous observations are essential to the constraints on the origin of fast radio bursts (FRBs). However, it is a significant observational challenge due to t…
A Monte Carlo approach to magnetar-powered transients: II. Broad-lined type Ic supernovae not associated with GRBs
Ling-Jun Wang, Zach Cano, Shan-Qin Wang +11
Broad-lined type Ic supernovae (SNe Ic-BL) are a subclass of rare core collapse SNe whose energy source is debated in the literature. Recently a series of investigations on SNe Ic-…
Evidence for magnetar formation in broad-lined type Ic supernovae 1998bw and 2002ap
L. J. Wang, H. Yu, L. D. Liu +6
Broad-lined type Ic supernovae (SNe Ic-BL) are peculiar stellar explosions that distinguish themselves from ordinary SNe. Some SNe Ic-BL are associated with long-duration (\gtrsim…
The shallow-decay phase in both optical and x-ray afterglows of Swift GRB 090529A: Energy injection into a wind-type medium?
L. P. Xin, A. Pozanenko, D. A. Kann +22
The energy injection model is usually proposed to interpret the shallow-decay phase in Swift GRB X-ray afterglows. However, very few GRBs have simultaneous signatures of energy inj…
Very Early Photometry of SN 1998S: Physical Parameters and Date of Explosion
H. Poon, J. C. S. Pun, T. Y. Lam +2
Context. We present very early optical lightcurves beginning 10 days before maximum of the Type IIn supernova 1998S, covering the first four months after discovery. Aims. We examin…
New Wolf-Rayet Galaxies with Detection of WC Stars
J. H. Huang, Q. S. Gu, L. Ji +3
We report the discovery of two new Wolf-Rayet (WR) galaxies: Mrk~1039, and F082082816. Two broad WR bumps at 5808Å~ and 4650Å~ indicate the presence of WCE and WNL star populati…
Steps Toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. XV. Long-Term Optical Monitoring of NGC 5548
B. M. Peterson, A. J. Barth, P. Berlind +34
We present the results of three years of ground-based observations of the Seyfert 1 galaxy NGC 5548, which combined with previously reported data, yield optical continuum and broad…
Steps toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. XII. Ground-Based Monitoring of 3C 390.3
M. Dietrich, B. M. Peterson, P. Albrecht
Results of a ground-based optical monitoring campaign on 3C 390.3 in 1994-95 are presented. The broad-band fluxes (B, V, R, and I), the spectrophotometric optical continuum flux F(…