Re: Linear range of the chip?

[Arne Henden <aah@nofs.navy.mil>]

There are good descriptions of determining linearity in the
Berry/Burnell AIP book.  While the CCD may be linear to its
saturation point, you do not not necessarily know where that
point is (Tom put it close to the ADC limit).  Likewise, at
the short end, you run into shutter problems and it is useful
to know at what minimum exposure everything works correctly.
Along with the linearity, learning about the gain and readnoise
are important parameters.  Not all CCDs are created equal.
Not all PC boards get assembled the same.  Tom does real good
at this, but a double-check is always good to perform.
   The more you know about the CCD/camera you are using, the
better you can make your observations.
Arne

Tom Droege wrote:
> Rob,
> 
> I did this a while back with my flat field box.  I think I wrote it up 
> for the list, but I can't find it.  I did not make it a TN.  Sigh!  
> Should have.