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3.9 Serendipity Mode

This was a specific photometric mode integrating with the C200 camera during slews in order to utilize the otherwise lost slew time between ISO's pointed observations and thus increase the overall observatory efficiency. It was not a generally selectable observation mode. Serendipity Mode was automatically activated by the Mission Planning software when a slew was longer than 30 s. For slews longer than 70 s an internal FCS measurement of 32 s was included. The filter used for Serendipity Mode was the 170 $\mu $m filter, the readout rate was fixed to a reset interval of 1/8 s.

ISO Handbook Volume IV (PHT), Version 2.0.1, SAI/1999-069/Dc