Fig. 1
Signal-to-noise ratio for single observations of PSR B1937+21 and reduction in “survey mode”. Top: 80-s pointings with second setup (24-MHz bandwidth). There were no observations in the second semester of 2005 because of a backend malfunction. Bottom: 60-s pointings with third setup (48-MHz bandwidth). These regular observations of the pulsar were made to check the functioning of the backend and monitor the sensitivity of the setup.
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