This is EIS Data Processing and Analysis page.
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• Data analysis routines

• The tilt of the EIS slit

• Offset between CCDs in the y direction

• Offset between CCDs in the x direction

• Orbital variation of line position

• Hot pixels

• EIS_CAT and the EIS Science Data Catalog

• Removing cosmic rays

• EIS pointing stability

• Fitting EIS lines with eis_moment

• A Wrapper to the EIS Objects (eis_getwindata)

• Where EIS was observing

• Complete List Of EIS Studies?

• Line width variation studies by EIS?

• Warm Pixels

• 2" EIS Slit

• Big EIS fits files

• Pointing Information in EIS fits files

• EIS internal coalignment?

• Inter-instrument offsets for Hinode

• EIS data analysis tutorial

Other EIS data analysis help source:

• EIS Tips (en) @ National Astronomical Observatory of Japan (NAOJ)

• EIS Tutorials @ Naval Research Laboratory (NRL)

• EIS Data Analysis Guide @ Mullard Space Science Laboratory (MSSL)

Some of you running quite short exposure times have noted that the different ways of getting the exposure time are not quite consistent with each other. This has now been fixed so that calling the getexp method i.e. data->getexp() should give the most accurate exposure time available.

For those who want to know the background for this issue I provide a little more info. There are three different exposure times for EIS: 1) the requested exposure time, set in eis_mkraster (or whatever) previously available as data->getexp() 2) the difference between the shutter open time t1 and shutter close time t2 ((*(data->getaux_data).ti_2)-(*(data->getaux_data).ti_1))/512 and 3) the exposure time as measured by the mechanism and heater control unit *(data->getaux_data).mhc_dur/1.e6.

The latter is the most accurate and has now been implemented as the default when calling data->getexp().

--ViggoHanst, 29-Nov-2007