Below are comparison images for ngc4244-halo11. Hold your mouse over one of the three segments of each dial (or the mask button) to see the image. Clicking on the segment will download the source image as a 4200x4200 jpeg. The artificial star test completness (Comp.) indicates the percentage of artificially generated stars recoverd given the selection culls of the pipeline. The F606W offset indicates the difference between the artificial star's F606W input magnitude and that subsequently measured by the pipeline. CMDs and diagnostic plots can be found further down the page.

Below is the CMD for the ngc4244-halo11 stars colored above.

The TRGB is found at F814W = 24.1 mag and I = 24.6, corresponding to a distance modulus of 28.19 (4.35 Mpc). The (V-I ) color of the RGB at M_I = -3.5 is 0.0, corresponding to a metallicity of [Fe/H] = -12.6.

Below are the diagnostic plots for the photometry output. Color indicates the cuts used.

The aperture corrections plotted above are the average of those shown below. The red line indicates the best fit to the aperture corrections of the entire GHOSTS survey.

Below are the results of the artifical star tests. Completeness indicates the fraction of artificial stars that were succesfully recovered given the selection cuts used in the pipeline.

The plots below show a representative sample of the full artificial star tests.

2007 David Radburn-Smith and the GHOSTS team. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
email: NOSPAMdjrs@stsci.edu