People

Dr. Jason Chi Sing Pun is current Principal Lecturer in the Department. He is interested in the promotion of science literacy within the university family and the general public. He is also actively involved in the public education on the environmental impact of light pollution. Dr. Pun is the recipient of the Secretary of Home Affairs’ Commendation Scheme in 2022, and the Dark Sky Defender Awards 2018 of the International Dark Sky Association (Darksky).

1. Studies of supernovae and supernova remnants: Evolution of the supernova explosion debris and its interactions with the circumstellar gas.
2. X-ray sources in galaxies: Studied populations of the Quasi-Stellar Sources and gamma-ray emission from pulsar winds at the galactic center, light curves of Gamma-Ray Bursts.
3. Cosmic-ray and neutrino physics: Dr. Pun has worked in Daya Bay Reactor Neutrino Experiment to study fundamental properties of neutrinos. Dr. Pun also started an experiment inside the Aberdeen Tunnel for studying the cosmic-ray induced background and for testing components of the Daya Bay experiment.
4. Studies of Light pollution: Dr. Pun initiated a systematic study to monitor the condition of night sky in order to have a complete picture of the conditions of light pollution in Hong Kong.

1. “Improved Measurement of the Evolution of the Reactor Antineutrino Flux and Spectrum at Daya Bay,” An, F. P., et al. (Daya Bay Collaboration) 2023, Physical Review Letters, 130, 211801 (2023)

2. “The photometric observation of the quasi-simultaneous mutual eclipse and occultation between Europa and Ganymede on 22 August 2021” So, C. W., et al.  2023, Icarus, 392, 115348 (2023)

3. “Multiple angle observations would benefit visible band remote sensing using night lights,” Kyba, C. C. M., et al., Journal of Geophysical Research: Atmospheres, e2021JD036382 (2022)

4.  

   “First Measurement of High-Energy Reactor Antineutrinos at Daya Bay,” An, F. P., et al. (Daya Bay Collaboration) Physical Review Letters, 129, 041801, (2022)

5.  

   “Analyzing long-term artificial light at night using VIIRS monthly product with land use data: Preliminary result of Hong Kong,” Liu, S.J., So, C. W., & Pun, C. S. J., Proceedings of IEEE International Geoscience and Remote Sensing Symposium IGARSS, 6821-6824 (2021)

    

6. “Measurement of cosmic-ray muons and muon-induced neutrons in the Aberdeen Tunnel Underground Laboratory,” Blyth, S. C., et al. (Aberdeen Tunnel Experiment Collaboration), Physical Review D, 93, 072005 (2016)

7. “The Destruction of the Circumstellar Ring of SN 1987A”, Fransson, C., et al. , Astrophysical Journal Letters, 806, 1, (2015)

8. “Contributions of artificial lighting sources on light pollution in Hong Kong measured through a night sky brightness monitoring network” Pun, C. S. J., et al., Journal of Quantitative Spectroscopy & Radiative Transfer, 139, 90 (2014)

9. “The Discovery of an X-ray/UV Stellar Flare from the Late-K/Early-M dwarf LMC 335”, Tsang, T. H., Pun, C. S. J., et al., Astrophysical Journal, 754, 107 (2012)

10. “Modeling the Hubble Space Telescope ultraviolet and optical spectrum of Spot 1 on the circumstellar ring of SN 1987A”, Pun, C. S. J. et al., Astrophysical Journal, 572, 906 (2002)

1. HKSAR Environment and Conservation Fund 2019 (PI): Effects of external lighting on the environment

2. HKU Teaching Development Grant 2023 (Co-I) Fostering a mobile-assisted peer-led eLearning (MAPLE) community to facilitate peer learning for large-sized science foundation courses
3. HKSAR Environment and Conservation Fund 2023 (Co-I): Exploratory Study of the Impact of Artificial Light at Night on Birds at Mai Po Nature Reserve