96 citations · 334 across the 19 of their papers we have counts for
20 papers
EP260321a/SN 2026gzf: The Faintest Shock Breakout Associated with a Broad-Lined Supernova
Brendan O'Connor, Xander J. Hall, Malte Busmann +33
The explosion of a star is first marked by the shock wave breaking out of the stellar surface, producing a burst of ultraviolet and X-ray radiation. These events are observationall…
Illuminating the Mass Gap Through Deep Optical Constraint on a Neutron Star Merger Candidate S250206dm
Zhengyan Liu, Zelin Xu, Ji-an Jiang +35
The gravitational wave (GW) event S250206dm, as the first well-localized neutron star merger candidate potentially located in the mass gap, presented a unique opportunity to probe…
PEARLS: 21 Transients Found in the Three-Epoch NIRCam Observations in the Continuous Viewing Zone of the James Webb Space Telescope
Haojing Yan, Bangzheng Sun, Zhiyuan Ma +39
We present 21 transients from our three-epoch, four-band NIRCam observations covering 14.16 arcmin^2 in the Spitzer IRAC Dark Field (IDF), taken by the JWST Prime Extragalactic Are…
Differencing and Coadding JWST Images with Matched Point Spread Function
Lei Hu, Lifan Wang
We present an algorithm to derive difference images for data taken with the JWST with matched point-spread functions (PSFs). It is based on the saccadic fast Fourier transform (SFF…
Point-like sources among z>11 galaxy candidates: contaminants due to supernovae at high redshifts?
Haojing Yan, Lifan Wang, Zhiyuan Ma +1
The recent searches for z>11 galaxies using the James Webb Space Telescope have resulted in an unexpectedly high number of candidate objects, which imply at least an order of magni…
Prospects of Searching for Type Ia Supernovae with 2.5-m Wide Field Survey Telescope
Maokai Hu, Lei Hu, Ji-an Jiang +4
Type Ia Supernovae (SNe Ia) are the thermonuclear explosion of a carbon-oxygen white dwarf (WD) and are well-known as a distance indicator. However, it is still unclear how WDs inc…
Deep Drilling in the Time Domain with DECam: Survey Characterization
Melissa L. Graham, Robert A. Knop, Thomas Kennedy +41
This paper presents a new optical imaging survey of four deep drilling fields (DDFs), two Galactic and two extragalactic, with the Dark Energy Camera (DECam) on the 4 meter Blanco…
Artificial Intelligence Assisted Inversion (AIAI): Quantifying the Spectral Features of Ni of Type Ia Supernovae
Xingzhuo Chen, Lifan Wang, Lei Hu +1
Following our previous study of Artificial Intelligence Assisted Inversion (AIAI) of supernova analyses (Chen et al. 2020), we train a set of deep neural networks based on the one-…
The Interaction of Supernova 2018evt with a Substantial Amount of Circumstellar Matter -- An SN1997cy-like Event
Yi Yang, Dietrich Baade, Peter Hoeflich +29
A rare class of supernovae (SNe) is characterized by strong interaction between the ejecta and several solar masses of circumstellar matter (CSM) as evidenced by strong Balmer-line…
Using 1991T/1999aa-like Type Ia Supernovae as Standardizable Candles
Jiawen Yang, Lifan Wang, Nicholas Suntzeff +13
We present the photometry of 16 91T/99aa-like Type Ia Supernovae (SNe Ia) observed by the Las Cumbres Observatory. We also use an additional set of 21 91T/99aa-like SNe Ia and 87 n…
Antarctic Survey Telescope 3-3: Overview, System Performance and Preliminary Observations at Yaoan, Yunnan
Tianrui Sun, Xiaoyan Li, Lei Hu +17
The third Antarctic Survey Telescope array instrument at Dome A in Antarctica, the AST3-3 telescope, has been in commissioning from March 2021. We deployed AST3-3 at the Yaoan astr…
Pipeline for Antarctic Survey Telescope 3-3 in Yaoan, Yunnan
Tianrui Sun, Lei Hu, Songbo Zhang +5
AST3-3 is the third robotic facility of the Antarctic Survey Telescopes (AST3) for transient surveys to be deployed at Dome A, Antarctica. Due to the current pandemic, the telescop…
Gravitationally Lensed Orphan Afterglows of Gamma-Ray Bursts
Hao-Xuan Gao, Jin-Jun Geng, Lei Hu +7
The cosmological nature of gamma-ray bursts (GRBs) implies that a small portion of them could be gravitationally lensed by foreground objects during their propagation. The gravitat…
Spectroscopic Studies of Type Ia Supernovae Using LSTM Neural Networks
Lei Hu, Xingzhuo Chen, Lifan Wang
We present a data-driven method based on long short-term memory (LSTM) neural networks to analyze spectral time series of Type Ia supernovae (SNe Ia). The dataset includes 3091 spe…
Image Subtraction in Fourier Space
Lei Hu, Lifan Wang, Xingzhuo Chen +1
Image subtraction is essential for transient detection in time-domain astronomy. The point spread function (PSF), photometric scaling, and sky background generally vary with time a…
SN 2018agk: A Prototypical Type Ia Supernova with a Smooth Power-law Rise in Kepler (K2)
Qinan Wang, Armin Rest, Yossef Zenati +73
We present the 30-min cadence Kepler/K2 light curve of the Type Ia supernova (SN Ia) SN 2018agk, covering approximately one week before explosion, the full rise phase and the decli…
Constraining Type Ia Supernova Delay Time with Spatially Resolved Star Formation Histories
Xingzhuo Chen, Lei Hu, Lifan Wang
We present the delay time distribution (DTD) estimates of Type Ia supernovae (SNe~Ia) using spatially resolved SN~Ia host galaxy spectra from MUSE and MaNGA. By employing a groupin…
The Tsinghua University-Ma Huateng Telescopes for Survey: Overview and Performance of the System
Ji-Cheng Zhang, Xiao-Feng Wang, Jun Mo +16
Over the past decade, time-domain astronomy in optical bands has developed rapidly with the operations of some wide-field survey facilities. However, most of these surveys are cond…
Artificial Intelligence Assisted Inversion (AIAI) of Synthetic Type Ia Supernova Spectra
Xingzhuo Chen, Lei Hu, Lifan Wang
We generate 100,000 model spectra of Type Ia Supernovae (SNIa) to form a spectral library for the purpose of building an Artificial Intelligence Assisted Inversion (AIAI) al…
Optical Observations of LIGO Source GW 170817 by the Antarctic Survey Telescopes at Dome A, Antarctica
Lei Hu, Xuefeng Wu, I. Andreoni +30
The LIGO detection of gravitational waves (GW) from merging black holes in 2015 marked the beginning of a new era in observational astronomy. The detection of an electromagnetic si…