HST Guide Star Catalog in Galactic Coordinates

This image is an Aitoff projection of the HST Guide Star Catalog in galactic coordinates. Source flux was collected into 15-arcminute bins after magnitudes were recalibrated to take into account the different wavelength responses between the photographic plates taken in the northern and southern hemispheres on which the catalog is based.

all-sky image

Picturing the Guide Star Catalog Figure 3