1998/09/24 by J. E. J. Lovell, D. L. Jauncey, J. E. Reynolds +6 · 3 citations
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy #Astrophysics #Flux (metallurgy) #Galaxy #Gamma-ray bursts and supernovae #Gravitation #Gravitational lens #Lens (geology) #Magnification #Materials science #Optics #Physics #Pulsars and Gravitational Waves Research #Radio telescope #Telescope #astro-ph
paper · pdf · doi:10.1086/311723
10 pages including 2 figures. To be published in ApJ Letters
arxiv created 1998/09/24 · openalex publication_date 1998/11/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We have measured a time delay of 26 + 4 −5 days and a magnification ratio of 1.52±0.05 in the strong radio gravitational lens PKS 1830-211. Observations were made over the 18 month period from 1997 January to 1998 July with the Australia Telescope Compact Array at 8.6 GHz, and they have shown that the source started a large flux density outburst around 1997 June.