Validation: Comparison with 2MASS Data

2MASS near-infrared data can be used to validate the starcount model out to K=14th mag (~2 mJy). The data was culled from the IRSA database. Artifacts and duplicated observations were eliminated (e.g., using the purge and persistence probability flags). Sources with high CHI^2 measurements (PSF-fitting) were eliminated, cleaning both artifacts and clearly extended sources from the sample. A moderate galactic longitude,l = 90 deg, was used for most tests. K-band starcounts and JHKs colors are compared with 2MASS data.

b = 90 deg

b = 30 deg
b = 20 deg
b = 10 deg
b = 5 deg
b = 2 deg