Bullet Cluster WL Shape Catalog — Path B Step 3
Charles Anthony Hyatt Battiste UM/FUM — USPTO 19/640,364 anchors

Input image: HST_ACS_BulletCluster\hst_10200_02_acs_wfc_f606w_j90702_drc.fits
Filter: F606W
Image shape: (6126, 7564)
Pixel scale: 0.0500 arcsec/pixel
Field area: 32.18 arcmin^2

Background: 0.071722
Background RMS: 0.006988

All detections: 4514
WL galaxy count: 382
WL source density: 11.87 sources/arcmin^2

Quality cuts applied:
  size_T > 3.00 pixels (resolved galaxies)
  S/N > 10
  e_mag < 0.9 (no extreme elongations)
  size_T < 30 pixels (no very-extended sources)
  extraction flag == 0

Ellipticity statistics (for selected WL sample):
  <e1> = -0.0309 +/- 0.0155
  <e2> = -0.0546 +/- 0.0160
  e1 RMS = 0.3029
  e2 RMS = 0.3129
  <e_mag> = 0.3739

Notes:
  Moments-based shape measurement, no PSF correction yet.
  Initial Path B Step 3 baseline. Production WL would add KSB+ PSF correction.
  This catalog is sufficient for joint SL+WL reconstruction at baseline accuracy.