This describes the columns and flags in the smf/cmf files.  They are listed in psModules/src/objects/pmSourceIO_CMF_PS1_V1.c, this is a slightly more descriptive version. 

== Columns ==

 * IPP_IDET - detection id (increment from 0 per chip - gaps are from magic)
 * X_PSF -position (in pixels
 * Y_PSF -position in pixels
 * X_PSF_SIGMA -position sigma
 * Y_PSF_SIGMA -position sigma
 * POSANGLE - position angle of the instrument coordinate system at source (ie, the angle between north and the y-axis) in degrees
 * PLTSCALE - plate-scale at the source position (it varies across the exposure!) in arcsec
 * PSF_INST_MAG - PSF Instrumental mag
 * PSF_INST_MAG - error for that
 * AP_MAG - aperture mag
 * AP_MAG_RADIUS - aperture mag radius (pixels)
 * PEAK_FLUX_AS_MAG - as it says, it is the flux (counts/pixel) for the peak pixel expressed as an instrumental magnitude (-2.5*log(flux))
 * CAL_PSF_MAG - calibrated PSF MAG
 * CAL_PS_MAG_SIG - error
 * RA_PSF - ra
 * DEC_PSF - dec
 * SKY - background in counts (DN, not electrons)
 * SKY_SIGMA -error
 * PSF_CHISQ - chisq of psf
 * CR_NSIGMA - cosmic ray
 * EXT_NSIGMA - extended source
 * PSF_MAJOR - major axis (pixel)
 * PSF_MINOR - minor axis (pixel)
 * PSF_THETA - angle
 * PSF_QF - the psf-weighted fraction of unmasked pixels: 
   * {{{\Sum_i (psf_i * !masked) / \Sum_i (psf_i)}}}
 * PSF_NDOF - number of degrees of freedom for the fit -- for the diff detections, the only free parameter is the flux, so N_DOF = N_PIX - 1; in other cases, there may be more parameters (eg, position, size, etc).
 * PSF_NPIX - number of pixels for fit
 * MOMENTS_XX - second moment in x: 
   * {{{\Sum ((x_i - x_o)^2 f_i) / \Sum (f_i) }}} where x_o is the centroid  {{{ \Sum (x_i f_i) / \Sum f_i }}}
 * MOMENTS_XY - second moment in xy: 
   * {{{\Sum ((x_i - x_o)(y_i - y_o)^2 f_i) / \Sum (f_i) }}}
 * MOMENTS_YY - second moment in xy  
   * {{{\Sum ((y_i - y_o)^2 f_i) / \Sum (f_i) }}}
 * FLAGS - see below
 * N_FRAMES - this is not currently set, but it is supposed to have the value of the number of input images overlapping the center of the source (for warp-warp diff, it would be 2, for a single image it would be 1, for a stack it may be something else).
 * PADDING - a dummy block of data needed to fit the rows into 8-byte boundaries (this lets me read into structures as a bulk byte read operation).


== Flags ==

||DEFAULT || 0  || Initial value: resets all bits ||
||PSFMODEL||1   || Source fitted with a psf model (linear or non-linear) ||
||EXTMODEL||2   ||Source fitted with an extended-source model||
||FITTED||4     ||Source fitted with non-linear model (PSF or EXT; good or bad)||
||FITFAIL||8    ||Fit (non-linear) failed (non-converge, off-edge, run to zero)||
||POORFIT||16   ||Fit succeeds, but low-SN, high-Chisq, or large (for PSF -- drop?)||
||PAIR    ||32  ||Source fitted with a double psf ||
||PSFSTAR||64   ||Source used to define PSF model ||
||SATSTAR||128  ||Source model peak is above saturation ||
||BLEND  ||256  ||Source is a blend with other sourcers ||
||EXTERNALPOS"||  512  || Source based on supplied input position ||
||BADPSF  ||1024 || Failed to get good estimate of object's PSF ||
||DEFECT ||2048 ||Source is thought to be a defect ||
||SATURATED||4096 ||Source is thought to be saturated pixels (bleed trail) ||
||CR_LIMIT ||8192 ||Source has crNsigma above limit ||
||EXT_LIMIT ||16384 ||Source has extNsigma above limit ||
||MOMENTS_FAILURE  ||32768 ||could not measure the moments ||
||SKY_FAILURE  ||65536 ||could not measure the local sky ||
||SKYVAR_FAILURE  ||131072 ||could not measure the local sky variance ||
||MOMENTS_SN  ||262144 ||moments not measured due to low S/N ||
||BIG_RADIUS ||1048576 ||poor moments for small radius, try large radius||
||AP_MAGS ||2097152 ||source has an aperture magnitude ||
||BLEND_FIT ||4194304 ||source was fitted as a blend ||
||EXTENDED_FIT||8388608||full extended fit was used ||
||EXTENDED_STATS||16777216||extended aperture stats calculated ||
||LINEAR_FIT|| 33554432||source fitted with the linear fit ||
||NONLINEAR_FIT||67108864 ||source fitted with the non-linear fit ||
||RADIAL_FLUX||134217728||radial flux measurements calculated||
||SIZE_SKIPPED||268435456||size could not be determined ||
||ON_SPIKE||536870912||peak lands on diffraction spike ||
||ON_GHOST||1073741824||peak lands on ghost or glint ||
||OFF_CHIP||2147483648||peak lands off edge of chip||
||NOCAL||4294967296||detection ignored for this analysis (photcode, time range) -- internal only ||
||POOR_PHOTOM||8589934592||detection is photometry outlier ||
||SKIP_PHOTOM||17179869184||detection was ignored for photometry measurement ||
||MEAS_AREA||34359738368||detection near image edge ||
||POOR_ASTROM||68719476736||detection is astrometry outlier ||
||SKIP_ASTROM||137438953472||detection was ignored for astrometry measurement||
||USED_OBJ||274877906944||detection was used during opdate objects||
||USED_CHIP||549755813888||detection was used during update chips||
||BLEND_MEAS||1099511627776||detection is within radius of multiple objects||
||BLEND_OBJ||2199023255552||multiple detections within radius of object||
||BLEND_MEAS_X||17592186044416||detection is within radius of multiple objects across catalogs||
||ARTIFACT||35184372088832||detection is thought to be non-astronomical||