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: http://xmm.vilspa.esa.es/calibration/documentation/CALHB/node948.html
Дата изменения: Tue Sep 20 19:45:21 2011 Дата индексирования: Mon Apr 11 03:38:46 2016 Кодировка: Поисковые слова: п п п п п п р п р п |
PSF1DRB extension | comment |
name | |
PSF-U | radial PSF of U-filter |
PSF-B | radial PSF of B-filter |
PSF-V | radial PSF of V-filter |
PSF-UVW1 | radial PSF of UVW1-filter |
PSF-UVM2 | radial PSF of UVM2-filter |
PSF-UVW2 | radial PSF of UVW2-filter |
PSF-WHITE | radial PSF of WHTIE-filter |
PSF-MAGNI | radial PSF of magnifier |
PSF-GRISM1 | radial PSF of UV grism 1st order (TBC) |
PSF-GRISM2 | radial PSF of visible grism 1st order (TBC) |
PSF-GRISM10 | radial PSF of UV grism 0th order (TBC) |
PSF-GRISM20 | radial PSF of visible grism 0th order (TBC) |
In the photometric calibration analysis a fixed aperture for each filter is used to extract the source counts. The value of the cumulative PSF is normalized to 1.0 at this fixed aperture radius. The aperture radius is listed for each filter elements in the keyword APERTURE. The integrated flux within the radius APERTURE. is defined to contain 100% of the source flux. The aperture radii in the analysis of UV data are generally larger than in the visible. Therefore the aperture radius is listed separately for each filter in the keyword APERTURE of the filter extensions.
The stretching of the PSF as function of field position is described
as function of the distance r between the detector location (x,y)
and the boresight, i.e. as function of
In the binary extensions the radial PSF at the central detector position of the specified filter is stored as integrated intensity (column INTENSITY) between the radial bins RMIN and RMAX. The PSF is stored for different count to framerate ratios (column CFRR).
The binary extensions have the follow structure:
Binary table: PSF-FilterId
keyword | keyword | keyword | keyword | comment |
name | type | unit | value | comment |
APERTURE | E | pixel | varies | aperture radius of photometric calibration |
PARX0Y0 | E | not applicable | varies | |
PARX1Y0 | E | not applicable | varies | |
PARX2Y0 | E | not applicable | varies | |
PARX3Y0 | E | not applicable | varies | |
PARX0Y1 | E | not applicable | varies | |
PARX1Y1 | E | not applicable | varies | |
PARX2Y1 | E | not applicable | varies | |
PARX0Y2 | E | not applicable | varies | |
PARX1Y2 | E | not applicable | varies | |
PARX0Y3 | E | not applicable | varies |
column name | column type | column unit | comment |
CFRR | E | counts/frame/resolution element | count to framerate ratio |
RMIN | 20E | subpixel | lower radius limit of bin |
RMAX | 20E | subpixel | upper radius limit of bin |
INTENSITY | 20E | not applicable | intensity in [RMIN,RMAX] |