An FLI Proline 16803 camera with Johnson-Cousins B,V,R,I and Sloan r,i,z filters is currently mounted on the telescope yielding an approximately 10'x10' FoV. Camera control is implemented via
ccdsh after the camera drivers are loaded. This can be done with the following command:
This line can also be included in the user's local startup script in the home directory. The camera driver file contains the followings:
module mod_fli_camera.so --device 184.108.40.206:8853 module mod_ace_filter.so define filter 1 B "Bessel B" define filter 2 V "Bessel V" define filter 3 R "Bessel R" define filter 4 I "Bessel I" define filter 5 C "Clear" define filter 6 E1 "Empty 1" define filter 7 E2 "Empty 2" define filter 8 r "Sloan r" define filter 9 i "Sloan i" define filter 10 z "Sloan z" define filter 11 E "Empty"
The first two lines load the camera and filter modules respectively, and the next eleven defines the filters.
The basic parameters of the camera and its CCD are the following:
The third column of the driver file contains the filter positions, the fourth the names which the filter can be referred to when using the
set filter command, and the fifth contains the names.
The camera can be cooled to in the winter, however in a warm summer, the lowest point which can be safely reached is around (consult the power usage via the
get temperature command).
In order to avoid oversampling of the PSFs, a 2x2 binning is recommended. Use the command line switch
-b 2,2 (or
--bin 2,2) to specify this binning. For instance, one can use the sequence
sequence -n xyocelotis -b 2,2 10*([g,60],[r,60],[i,60])
The pickoff mirror and the off-axis guider mirrors block the light from reaching the camera. Do not forget to switch off the spectrograph:
acectrl --stop, and move the guider mirror to the side:
acectrl --guide-xstage-reset, before starting the observations.
The camera can be focused with the usual
set focus command within
For quality test, see this document:pdf