Outputs (3)

35 Years of Ground-Based Gamma-ray Astronomy (2021)
Journal Article
Chadwick, P. (2021). 35 Years of Ground-Based Gamma-ray Astronomy. Universe, 7(11), Article 432. https://doi.org/10.3390/universe7110432

This paper provides a brief, personal account of the development of ground-based gamma-ray astronomy, primarily over the last 35 years, with some digressions into the earlier history of the field. Ideas related to the imaging of Cherenkov events and... Read More about 35 Years of Ground-Based Gamma-ray Astronomy.

V404 Cygni with Fermi-LAT (2021)
Journal Article
Harvey, M., Rulten, C. B., & Chadwick, P. M. (2021). V404 Cygni with Fermi-LAT. Monthly Notices of the Royal Astronomical Society, 506(4), 6029-6038. https://doi.org/10.1093/mnras/stab2097

We revisit the well-studied outburst of the low-mass X-ray binary (LMXB) system V404 Cygni, and claims of γ-ray excesses observed with the Fermi-LAT instrument. Upon analysing an 11.5 yr data set with the 8-yr LAT point source catalogue and 8-yr back... Read More about V404 Cygni with Fermi-LAT.

Axion constraints from quiescent soft gamma-ray emission from magnetars (2021)
Journal Article
Lloyd, S. J., Chadwick, P. M., Brown, A. M., Guo, H.-K., & Sinha, K. (2021). Axion constraints from quiescent soft gamma-ray emission from magnetars. Physical Review D, 103(2), Article 023010. https://doi.org/10.1103/physrevd.103.023010

Axion-like-particles (ALPs) emitted from the core of a magnetar can convert to photons in its magnetosphere. The resulting photon flux is sensitive to the product of (i) the ALP-nucleon coupling Gan which controls the production cross section in the... Read More about Axion constraints from quiescent soft gamma-ray emission from magnetars.