European Southern Observatory
New Technology Telescope
For spectroscopic observations, objects are acquired by moving them into an overlay drawn on the RTD. The parameters of the drawing are defined in the file /data/SOFI/SYSTEM/MISC/OS/isosConfig.cfg.
For the 1" slit the file looks like
OCS.CON.RTD.SM-ID2 "long_slit_1"; #
OCS.CON.RTD.OBJ-ID2 "LF"; #
OCS.CON.RTD.DRW-DESC2 "SLIT 529 504.0 0 990 3.5 -width 4 -fill magenta";
The most important parameter is the location of the y slit center. In the example above, this is 504.0. The slit center can be dtermined by running the template SOFI_spec_tec_AlignSlit. The slit center is written in the file /vltdata/SPC/SOFI_spec_tec_AlignSlit.SPC.
Checking the Alignment
Editing the Configuration File
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