CRIRES
Quality Control: spectro-photometric standards |
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Telluric and spectro-photometric standard stars are chiefly observed on request of the Service Mode or Visitor Mode observer. For health check purposes, spectro-photometric standards are frequently measured for a small number of settings: 1087.3, 1504.8, 2205.0, 3611.0, and 5050.4 nm. Standard stars are reduced in the same way as science exposures (see the pipeline recipe crires_spec_jitter). For spectro-photometric standards, the instrumental throughput, sensitivity, and conversion factor per wavelength are calculated in addition.
QC1 parameters for CRIRES standard star exposures are inserted into the QC1 database only for spectro-photometric standards (and not for telluric standards). They are calculated for each detector array separately. QC1 parameters
Trending Throughput is trended for the five health check settings. History Pipeline versions earlier than 2.1.x contained a bug for the efficiency calculation. This has been fixed in April 2011. Older values in the QC1 database have been corrected. The conversion factor between old and new values is about 2.4/100. |
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