Neutron stars and stellar-mass black holes are the remnants of massive star explosions 1 .
Most massive stars reside in close binary systems 2 , and the interplay between the …

The Chinese Space Station Optical Survey (CSS-OS) is a major science project of the
Space Application System of the China Manned Space Program. This survey is planned to …

SN 2023ixf, recently reported in the nearby galaxy M101 at a distance of 6.85 Mpc, was one
of the closest and brightest core-collapse supernovae in the last decade. In this work, we …

Convolutional neural networks have been successfully applied in searching for strong lensing
systems, leading to discoveries of new candidates from large surveys. On the other hand, …

We present early-phase good-cadence (hour-to-day) simultaneous multiband (ugi and vrz
bands) imaging of the nearby supernova SN 2024ggi, which exploded in the nearby galaxy …

We present a sample of 16 likely strong gravitational lenses identified in the VST Optical
Imaging of the CDFS and ES1 fields (VOICE survey) using convolutional neural networks (CNNs…

The precise estimation of the statistical errors and accurate removal of the systematical
errors are the two major challenges for the stage IV cosmic shear surveys. We explore their …

Strong gravitational lensing is a powerful tool for investigating dark matter and dark energy
properties. With the advent of large-scale sky surveys, we can discover strong-lensing …

In photometric observations, the flux averaged over the preset exposure time is usually used
as the representation of an object’s true flux at the middle of the exposure interval. For the …

The tilt, rotation, or offset of each CCD with respect to the focal plane, as well as the distortion
of the focal plane itself, causes shape distortions in the observed objects, an effect typically …