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| QC PLOTS |
| Health Check AO: |
CURRENT |
HISTORY |
| fibre |
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| QC1 database (advanced users):
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plot |
Click on CURRENT to see the current trending (Health Check).
Click on HISTORY to see the historical evolution of the trending. |
The central maximum, in units of total flux of a PSF source, is a measure of the image quality and the adaptive optics (AO) performance. A least once per day an illuminated internal fibre is imaged with the adaptive optics active (K-band grating at the 25 mas pixel scale). The sinfo_rec_jitter recipe subtracts a DARK and performs a cube reconstruction. The strehl ratio is calculated on this single internal fibre image as a function of wavelength (NB. Being an internal source the fibre image is not subject to any atmospheric turbulence).
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The SINFONI adaptive optic health check fibre.
Left panel: The stacked PSF fibre calibration.
Right panel: The cube-reconstructed fibre image. |
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WAVE parameters trended |
QC1 plots
The QC1 plots for the SINFONI strehl ratios show the:
- strehl ratio of the fibre (i.e. the median value of all wavelengths within the reconstructed cube)
- encircled energy of the fibre (i.e. the median value of all wavelengths within the reconstructed cube)
- rms error in the strehl ratio (in units of 10-4)
- mean flux of the extracted fibre spectrum
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The trending plots of the fibre light source: the median strehl ratio, the median encircled energy, the standard deviation of the strehl ratio, and the mean flux of the extracted fibre spectrum. The AO fibre health check is only obtained with the K-band grism at the 25 mas pixel scale.
Note: The standard deviation is in units of 10-4.
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QC1 parameters trended
| Plot |
Parameter |
Table: Name (QC1 database) |
Description of Procedure |
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strehl ratio |
sinfoni_hcao: qc_strehl_med |
SINFONI pipeline: Based on a single observation of the internal illuminated fibre, the sinfo_rec_jitter recipe subtracts a DARK frame and performs a cube reconstruction. The strehl ratio is determined using:
where Imaxobj is the maximum intensity measured in the sky-subtracted object and Fobj is its corresponding total flux. ImaxPSF and FPSF are, respectively, the theoretical maximum intensity and total flux attainable given the telescope M1 and M2 diameters, the central wavelength and wavelength range, at a given pixel scale. The strehl ratio plotted is the median of all the strehl values computed for each wavelength step in the reconstructed image cube. |
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encircled energy |
sinfoni_hcao: qc_enc_core |
SINFONI pipeline: The encircled energy is simply the integrated counts within radii of increasing r centered on the position of the fibre's maximum flux. |
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error strehl ratio |
sinfoni_hcao: qc_strehl_mederr |
SINFONI pipeline: The standard deviation of all the strehl values computed for each wavelength step in the reconstructed image cube. |
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fibre mean flux |
sinfoni_hcao: qc_frmdif_meanflux |
SINFONI QC script: For each wavelength plane of the reconstructed image cube, the source is detected and the total counts are integrated, resulting in an extracted spectrum of flux vs. wavelength. The mean value of this extracted spectrum is computed and is used to monitor the health and stability of the fibre lamp. |
Trending and Issues
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