This page is designed to provide a starting point for the analysis of
UVOT data are taken in 3 modes: Image mode, Event mode and Image&Event
mode. There are 7 broadband filters and 2 grisms, and various window
sizes. The subsequent pages deal with analysis of Image mode data. Event
mode data are treated in a similar way to X-ray data. For analysis of
Event mode data and grism observations you are referred to the UVOT
Software Guide, the UVOT Digest and Paul Kuin's "brief data reduction guide for UVOT grism data".
Online help for any
of the UVOT tasks can be found with
fhelp taskname or
Here we assume that at least the first batch of data has come down (after the TDRSS data), and we start from the Level 2 products. Steps to convert Level 1 into Level 2 products are not outlined here; for this you are referred to the Swift UVOT Software Guide. Particular care should be taken with the reduction and analysis if the field is crowded, the background is high or your source is very bright or very faint.