QUB Transient Classification Server

In order to reduce the number of spurious sources detected, the QUB Transient Classification Server will attempt to use the following IPP Object Catalog bitmasks.

IPP Object Catalog BItmasks

The following bitmasks are defined in source:trunk/psModules/src/objects/pmSourceMasks.h​ (which should be regarded as the authoritative source of these definitions).

Note that for readability, the PM_SOURCE_MODE_ prefix has been omitted from the flag name below.

Flag Name         Binary representation                      Hex            Decimal     Definition
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PSFMODEL          0000 0000 0000 0000 0000 0000 0000 0001    00 00 00 01            1   Fit with PSF model
EXTMODEL          0000 0000 0000 0000 0000 0000 0000 0010    00 00 00 02            2   Fit with extended model
FITTED            0000 0000 0000 0000 0000 0000 0000 0100    00 00 00 04            4   Fit with non-linear model
FAIL              0000 0000 0000 0000 0000 0000 0000 1000    00 00 00 08            8   Non-linear fit failed
POOR              0000 0000 0000 0000 0000 0000 0001 0000    00 00 00 10           16   Non-linear fit poor
PAIR              0000 0000 0000 0000 0000 0000 0010 0000    00 00 00 20           32   Fit with double PSF
PSFSTAR           0000 0000 0000 0000 0000 0000 0100 0000    00 00 00 40           64   Used to define PSF model
SATSTAR           0000 0000 0000 0000 0000 0000 1000 0000    00 00 00 80          128   Model peak is above saturation
BLEND             0000 0000 0000 0000 0000 0001 0000 0000    00 00 01 00          256   Blended with other sources
EXTERNAL          0000 0000 0000 0000 0000 0010 0000 0000    00 00 02 00          512   Based on supplied input position
BADPSF            0000 0000 0000 0000 0000 0100 0000 0000    00 00 04 00         1024   Unable to estimate object PSF
DEFECT            0000 0000 0000 0000 0000 1000 0000 0000    00 00 08 00         2048   Suspected defect
SATURATED         0000 0000 0000 0000 0001 0000 0000 0000    00 00 10 00         4096   Suspected saturated (bleed trail)
CR_LIMIT          0000 0000 0000 0000 0010 0000 0000 0000    00 00 20 00         8192   Suspected cosmic ray
EXT_LIMIT         0000 0000 0000 0000 0100 0000 0000 0000    00 00 40 00        16384   Suspected extended
MOMENTS_FAILURE   0000 0000 0000 0000 1000 0000 0000 0000    00 00 80 00        32768   Failed to measure moments
SKY_FAILURE       0000 0000 0000 0001 0000 0000 0000 0000    00 01 00 00        65536   Failed to measure local sky
SKYVAR_FAILURE    0000 0000 0000 0010 0000 0000 0000 0000    00 02 00 00       131072   Failed to measure sky variance
BELOW_MOMENTS_SN  0000 0000 0000 0100 0000 0000 0000 0000    00 04 00 00       262144   Moments not measured due to low
BIG_RADIUS        0000 0000 0001 0000 0000 0000 0000 0000    00 10 00 00      1048576   Small radius has poor moments
AP_MAGS           0000 0000 0010 0000 0000 0000 0000 0000    00 20 00 00      2097152   Measured aperture magnitude
BLEND_FIT         0000 0000 0100 0000 0000 0000 0000 0000    00 40 00 00      4194304   Fit as a blend
EXTENDED_FIT      0000 0000 1000 0000 0000 0000 0000 0000    00 80 00 00      8388608   Fit with full extended fit
EXTENDED_STATS    0000 0001 0000 0000 0000 0000 0000 0000    01 00 00 00     16777216   Calculated extended aperture st
LINEAR_FIT        0000 0010 0000 0000 0000 0000 0000 0000    02 00 00 00     33554432   Fit with linear fit
NONLINEAR_FIT     0000 0100 0000 0000 0000 0000 0000 0000    04 00 00 00     67108864   Fit with non-linear fit
RADIAL_FLUX       0000 1000 0000 0000 0000 0000 0000 0000    08 00 00 00    134217728   Calculated radial flux measuremen
SIZE_SKIPPED      0001 0000 0000 0000 0000 0000 0000 0000    10 00 00 00    268435456   Could not be determine size
ON_SPIKE          0010 0000 0000 0000 0000 0000 0000 0000    20 00 00 00    536870912   Peak lands on diffraction spike
ON_GHOST          0100 0000 0000 0000 0000 0000 0000 0000    40 00 00 00   1073741824   Peak lands on ghost or glint
OFF_CHIP          1000 0000 0000 0000 0000 0000 0000 0000    80 00 00 00   2147483648   Peak lands off edge of chip

Suggested Filter Bitmasks

The following masks have been suggested to aid the sorting process for identifying reliable transient sources.

Flag Name         Binary representation                      Hex            Decimal     Definition
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BAD_FLAGS         1111 0000 0000 0111 1111 1111 1001 1000    F0 07 FF 98   4027056024   See above
GOOD_FLAGS        0000 0000 0000 0000 0000 0000 0000 0101    00 00 00 05            5   See above