Changeset 30624 for trunk/psphot/doc/stack.txt

Timestamp:

Feb 13, 2011, 12:33:05 PM (15 years ago)

Author:

eugene

Message:

adding some of the metadata needed by PSPS to output headers; skip models with few valid pixels (eg, only the edge is showing); only do the linear fit on pixels within the fit radius; modify psf-match auto-scaling process; enable multiple target psfs for matched-psf aperture photometry; speed up analysis of the radial apertures

Location:

trunk/psphot

Files:

• . (modified) (1 prop)
• doc/stack.txt (modified) (1 diff)

trunk/psphot/doc/stack.txt

@@ +1 @@
+
+20101221 
+
+  psphotStackReadout is now correctly subtracting the PSF models from
+  the images as it measures the radial aperture fluxes. 
+
+  Some issues:
+
+  * the source properties get buggered up by the radial aperture flux
+    analysis (we need to re-determine the psf, re-create the source
+    pixels, and re-fit the models (linearly) to subtract them
+    correctly).
+
+  * the standard analysis sequence is not doing a second pass
+
+  * the choice of the best model is ambiguous
+
+  * the radial aperture (and source addition / subtraction) is only
+    using the PSF model
+
+  * make sure psphotEfficiency actually subtracts the inserted fake
+    sources
+
+  * XXX how does the PSF-convolved model work with changing psf models?
+
+20101207
+
+  header fields for PSPS:
+
+  * stack needs to count # of inputs
+  * propagate the input header to the output image (DONE)
+  * save PSF parameters in header 
+  * stack type is only known to the launcher
+
+  * what are we doing for the stack calibrations??
+
+skycellID    : code
+surveyID     : code
+filterID     : code
+stackMetaID  : stack_id 
+photoCalID   : photcode -> number
+magSat       : FSATUR       saturation magnitude level ** not correctly set
+completMag   : FLIMIT       95% completion level in mag ** not correctly set 
+stackTypeID  : STK_TYPE     stack type identifier ** deep stack, nightly stack, best IQ stack?
+refImageID   :              identifier of image used as reference for analysis
+subtrImageID : N/A (stack)  identifier of image subtracted to generate difference image
+analVer      :              analysis version index  ** index for tess_id + skycell_id + filter?
+nP2Images    : NINPUTS      number of P2 images contributing to this cell ** missing from input stack
+astroScat    :              astrometric scatter for chip ** measure scatter on stack creation?
+photoScat    :              photometric scatter for chip ** internal scatter?  
+nAstroRef    :              number of astrometric reference sources ** (connected to above)
+nPhoRef      :              number of photometric reference sources ** same
+psfFwhm      :              PSF full width at half maximum ** 0.5(FWHM_MAJ + FWHM_MIN)
+psfmodelID   : * PSFMODEL   PSF model identifier ** save the PSF model name in the header
+psfWidMajor  : * FWHM_MAJ     PSF parameters
+psfWidMinor  : * FWHM_MIN     PSF parameters
+psfTheta     : * ANGLE        PSF parameters
+psfExtra1    : * PSF_EXT1   PSF parameters ** (at field center?)
+psfExtra2    : * PSF_EXT2   PSF parameters ** (not set for all models)
+photoZero    :              local derived photometric zero point 
+photoColor   :              local derived photometric color term
+ctype1       : * CTYPE1             name of astrometric projection in RA ** propagate from input stacks
+ctype2       : * CTYPE2             name of astrometric projection in DEC
+crval1       : * CRVAL1             RA corresponding to reference pixel
+crval2       : * CRVAL2             DEC corresponding to reference pixel
+crpix1       : * CRPIX1             reference pixel value for RA
+crpix2       : * CRPIX2             reference pixel value for DEC
+cdelt1       : * CDELT1             scale factor for RA
+cdelt2       : * CDELT2             scale factor for DEC
+pc001001     : * PC001001           elements of rotation/Dcale matrix
+pc001002     : * PC001002           elements of rotation/Dcale matrix
+pc002001     : * PC002001           elements of rotation/Dcale matrix
+pc002002     : * PC002002           elements of rotation/Dcale matrix
+polyOrder    : * NPLYTERM           polynomial order of astrometry fit ** default to 1
+pca1x3y0     : * PCA1X3Y0     polynomial coefficients for the astrometric fit
+pca1x2y1     : * PCA1X2Y1     polynomial coefficients for the astrometric fit
+pca1x1y2     : * PCA1X1Y2     polynomial coefficients for the astrometric fit
+pca1x0y3     : * PCA1X0Y3     polynomial coefficients for the astrometric fit
+pca1x2y0     : * PCA1X2Y0     polynomial coefficients for the astrometric fit
+pca1x1y1     : * PCA1X1Y1     polynomial coefficients for the astrometric fit
+pca1x0y2     : * PCA1X0Y2     polynomial coefficients for the astrometric fit
+pca2x3y0     : * PCA2X3Y0     polynomial coefficients for the astrometric fit
+pca2x2y1     : * PCA2X2Y1     polynomial coefficients for the astrometric fit
+pca2x1y2     : * PCA2X1Y2     polynomial coefficients for the astrometric fit
+pca2x0y3     : * PCA2X0Y3     polynomial coefficients for the astrometric fit
+pca2x2y0     : * PCA2X2Y0     polynomial coefficients for the astrometric fit
+pca2x1y1     : * PCA2X1Y1     polynomial coefficients for the astrometric fit
+pca2x0y2     : * PCA2X0Y2     polynomial coefficients for the astrometric fit
+calibModNum  :              calibration modification number
+dataRelease  :              Data release
 
 20100506: