[ ESO ]
NACO Quality Control:
photometric zeropoints
HOME

shortcuts:
general
product_plot
product_difference
trending
 

NACO QC zeropoints : GENERAL

CONICA raw frames taken with the NACO_img_cal_StandardStar template come in series of 5 files. Instrument related parameters are the camera, the filter and the dichroic. The naco_img_zpoint recipe generates a product and calculates a number of QC parameters, where the most important are ZPOINT and STREHL. See the User Manual for details. Other quality checks are performed by post-pipeline processing scripts.

  • PRODUCT_PLOT. This means that for each pipeline product and its associated raw frames we create a plot with the most significant features.
  • QC1 PARAMETER CROSS CHECK. This means that selected QC1 parameters are compared with the ones previously obtained.
  • TRENDING. This means that we store all qc1 parameters and build Run Charts which simply show the parameter as a function of time over a larger time interval.

NACO product files follow a certain naming convention.

[top] PRODUCT PLOT


There follows for each mpflat product type a QC1 plot. The Figure caption is equal for all four plots.


Figure caption
Flux in counts as derived from the zpoint recipe as a function of the 8 difference frames. Median, and +-sigma are shown

Background in counts as derived from the zpoint recipe as a function of the 8 difference frames. Median, and +-sigma are shown.

Magnitudes, as derived from the the zpoint recipe as a function of the 8 difference frames. Median, and +-sigma are shownZoomed: FWHM as derived from the zpoint recipe as a function of the 8 difference frames. blue=FWHM_X, green=FWHM_Y, red=sqrt(FWHM_X * FWHM_Y).

 

 

[top]TRENDIND PLOTS
 


Trending describes the variation of a QC1 parameter within a rge time range. We show a time range of 4 months and generate 4 trending plots a year. The variation of the zeropoints are used for two purposes:

  • to decide if a specific night was photometric
  • to check on filter efficiency (filter throughput aging)
  • to check on the troughput of the whole (telescope, NAOS, CONICA) system.
  • ZPOINT = the photometric zeropoint as given by the zpoint recipe. Meaning the given values are not corrected for airmass (and extinction). Note that the zpoint recipe builds 8 difference frames from 5 raw input frames, rejects the MIN and MAX values and takes the median of the remaining 6 zpoint values.
  • ZPOINT (gif | ps)

  • ZPOINT(airmass=1) = the photometric zeropoint as given by the zpoint recipe, corrected for extinction, using kappa(J)=0.11, kappa(H)=0.06 and kappa(Ks)=0.07

    ZPOINT_corr (gif | ps)

  • ZPOINT(airmmass=1)S27 = the photometric zeropoint collected, using the camear S27 alone, as given by the zpoint recipe, corrected for extinction, using kappa(J)=0.11, kappa(H)=0.06 and kappa(Ks)=0.07

    ZPOINT_corr_S27: (gif | ps)

  • STREHL ratio per filter = the strehl ratio as measured from the photometric zeropoint as given by the zpoint recipe per filter

    STREHL_ZPF (gif | ps)

  • STREHL ratio per dichroic = the strehl ratio as measured from the photometric zeropoint as given by the zpoint recipe per dichroic

    STREHL_ZPD (gif | ps)

  • STREHL ratio per wsf-type = the strehl ratio as measured from the photometric zeropoint as given by the zpoint recipe per wavefront sensor type

    STREHL_ZPT (gif | ps)

  • STREHL ratio per wfs-mode = the strehl ratio as measured from the photometric zeropoint as given by the zpoint recipe per wavefront sensor mode

    STREHL_ZPM (gif | ps)


Send comments to <Danuta.Dobrzycka@eso.org> 
Last update: August 21, 2007

[NACO QC][Observing Facilities and Operations][ESO][Index][Search][Help][News]