7 papers
SN 2022erq: A Superluminous Thermonuclear Supernova with Escalating Preexplosion Mass Loss
Qian Zhai, Jujia Zhang, Xiaofeng Wang +51
We present a photometric and spectroscopic study of the superluminous Type Ia supernova SN 2022erq. Its early spectra, dominated by iron-group elements with weak intermediate-mass…
Research on the Flat Field Measurement Method of Coronagraph
Yulong Feng, Xuefei Zhang, Hongfei Liang +4
The solar corona has an extremely low density, and its brightness is only about one millionth of that of the photosphere. High-dynamic-range imaging of its faint structure is there…
Observational Technological Innovations and Future Development of the Lijiang Coronagraph
Xuefei Zhang, Yu Liu, Tengfei Song +5
As a core ground-based coronal observation facility in China's low-latitude high-altitude regions, the Lijiang Coronagraph leverages the natural advantages of Lijiang Astronomical…
Atmospheric turbulence profiling with the Multistar Turbulence Monitor
Weisen Huang, Bin Ma, Tengfei Song +5
Accurate characterization of atmospheric optical turbulence is essential for evaluating astronomical sites and optimizing adaptive optics systems. The Multistar Turbulence Monitor…
SN 2023axu: A Type IIP Supernova Interacted with a Low-Density Stellar Wind
Zeyi Wang, Jujia Zhang, Qian Zhai +8
We present photometric and spectroscopic observations of Type IIP supernova SN 2023axu, spanning 400 d after the explosion. Its light curve is typical of normal SNe IIP, with…
The R2Pub Telescopes for Surveying: An Overview and Performance Evaluation of the System
Xuan Song, Xiaofeng Wang, Jin Zhu +29
The R2Pub telescope, built by the Beijing Planetarium, is a 60 cm equatorial binocular telescope located at the Daocheng site of Yunnan Observatories in China, at an altitude of ab…
Characterization and Correction of the Scattering Background Produced by Dust on the Objective Lens of the Lijiang 10-cm Coronagraph
Feiyang Sha, Yu Liu, Xuefei Zhang +1
Scattered light from the objective lens, directly exposed to the intense sunlight, is a dominant source of stray light in internally occulted coronagraphs. The variable stray light…