QC PLOTS
	CURRENT	HISTORY
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.

QC1 parameters

• efficiency_<i> (QC1 database table fors2_response, column efficiency_<i>, i=1...15 )
  This is the efficiency as derived from observations of spectrophotometric standard stars. These spectrophotometric standard stars are acquired with the MOS #10 slit with the slit width of 5 arcsec. MOS slit #10 is projected on the upper CCD of the FORS2 mosaic detector. The position of the MOS #10 slit is either in the center to calibrate MXU and MOS science observations or it is shifted to one of the seven positions of the LSS slits to calibrate LSS science spectra. (see Appendix E.2 of the FORS2 User Manual for the long slit positions).
  The efficiency is taken from the efficiency curve at the given wavelength (starting at 3700Å and ending at 9300Å). The efficiency curve is derived by comparing observed flux values to tabulated ones and is then strongly smoothed. For more details see the FORS2 pipeline manual.

Trending

History

Since 2011-01-17 we use the new Paranal extinction curve.