<p style='text-align: justify;'>Photograph of the moving element of the 4C interferometer at Lord's Bridge. This large interferometer used the principles of aperture synthesis to create a high sensitivity map of the northern sky at 178 MHz. The 4C catalogue became the standard source catalogue at that frequency, eventually containing about 5,000 radio sources of small angular diameter with flux densities greater than 2 Jy.</p>
Under the 'View more options' menu you can find metadata about the item, any transcription and translation we have of the text and find out about sharing this image.
The images contained in the pdf download have the following copyright:
This will create a PDF with thumbnail images for all pages, and may take some time for large documents.
The images contained in this document have the following copyright:
This image has the following copyright:
Choose one of the available sizes to download:
This metadata has the following copyright:
Do you want to download metadata for this document?