CRIRES Quality Control: spectro-photometric standards

CRIRES Quality Control:
spectro-photometric standards

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QC PLOTS
	CURRENT	HISTORY
STD efficiency
QC1 database (advanced users): browse \| plot
Click on CURRENT to see the current trending (Health Check). Click on HISTORY to see the historical evolution of the trending.

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.

top Spectro-photometric standards

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

parameter	QC1 database: table, name	procedure
median conversion factor	crires_std, med_conv	median of conversion factor (in ADU/sec/Jy); the ratio of the extracted flux to the tabulated flux of the standard star
median troughput	crires_std, med_through	median of the throughput per wavelength (in e-/photon); the number of detected electrons per photon
median sensitivity	crires_std, med_sens	median of the sensitivity (in Jy/10sigma/hour)
spectral position	crires_std, spec_pos	median of the spectral position (in Y direction) on the detector

Trending

Throughput is trended for the five health check settings.