USNO-B1.0 mission creep

While Barron soldiered on with enhancements to the automatic procedures for diffraction-spike and reflection-halo spurious-source detection, Stumm and I indulged in some mission creep: We looked at methods for identifying dense, linear features in the sky distribution of USNO-B1.0 sources that are not caused by diffraction spikes. The origin of some of these features are edge-on galaxies; the origin of others are incredibly unlikely coincidences of artifacts in multiple bands (inclusion in USNO-B1.0 required detection in multiple bands); and the origin of others are incredibly weird plates we don't understand. We didn't have much success with Hough Transform techniques, but we theorized a ransac-like approach that is promising.

No comments:

Post a Comment