Results 1 to 10 of about 16,604,898 (278)
Image Preprocessing Framework for Time-domain Astronomy in the Artificial Intelligence Era
The Astronomical JournalThe rapid advancement of image analysis methods in time-domain astronomy, particularly those leveraging artificial intelligence (AI) algorithms, has highlighted efficient image preprocessing as a critical bottleneck affecting algorithm performance. Image
Liang Cao +5 more
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The Astrophysical Journal Supplement SeriesHigh-quality Extragalactic Legacy-field Monitoring (HELM) is a long-term observing program that photometrically monitors several well-studied extragalactic legacy fields with the Dark Energy Camera (DECam) imager on the CTIO 4 m Blanco telescope.
Ming-Yang Zhuang +48 more
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A Luminous Red Optical Flare and Hard X-Ray Emission in the Tidal Disruption Event AT 2024kmq
The Astrophysical JournalWe present the optical discovery and multiwavelength follow-up observations of AT 2024kmq, a likely tidal disruption event (TDE) associated with a supermassive ( M _BH ∼ 10 ^8 M _⊙ ) black hole in a massive galaxy at z = 0.192.
Anna Y. Q. Ho +32 more
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Sub-burst-resolved Classification and Characteristics of Double-trigger Gamma-Ray Bursts
The Astrophysical JournalOver the past two decades, Swift and Fermi have detected a handful of gamma-ray bursts (GRBs) that produced two independent onboard triggers separated by a quiescent interval long enough for the trigger system to reset (“double-trigger” events ...
Liang Li
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The Astrophysical Journal Supplement SeriesLong gamma-ray bursts (GRBs) frequently exhibit complex prompt-emission morphology, including a bright main-emission (ME) episode followed by a weaker extended-emission (EE) component.
Liang Li +7 more
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Astronomy & AstrophysicsContext. The impact of extremely low-density environments such as the diffuse intergalactic medium (IGM) on the neutral gas distribution of dwarf galaxies remains poorly explored observationally. Aims.
Namumba Brenda +14 more
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Relativistic Effects and Gamma-Ray Burst Polarization in Power-law Evolution
The Astrophysical Journal Supplement SeriesDespite decades of polarization observations and high significance of polarized γ -ray, X-ray, optical, and radio emissions in gamma-ray bursts (GRBs) accumulating in dozens of cases, people have yet to find a consistent scenario for understanding the ...
Liang Li, She-Sheng Xue, Rong-Gen Cai
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GRB 190114C: Fireball Energy Budget and Radiative Efficiency Revisited
The Astrophysical JournalThe jet composition of gamma-ray bursts (GRBs), as well as how efficiently the jet converts its energy to radiation, are long-standing problems in GRB physics.
Liang Li, Yu Wang
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Could the Interband Lag of Active Galactic Nucleus Vary Randomly?
The Astrophysical JournalThe interband lags among the optical broad-band continua of active galactic nuclei (AGNs) have been intensively explored over the past decade. However, the nature of the lags remains under debate.
Zhen-Bo Su +20 more
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The Astrophysical JournalInterband lags in the optical continua of active galactic nuclei (AGNs) have been observed over years of monitoring, yet their physical origins remain unclear.
Zhen-Bo Su +4 more
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