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Example #7: Comparing HSC "Sloan" filter magnitudes and SDSS magnitudes (using the field around GRB110328A)

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GOAL: To determine how well the WFC3 "Sloan" filters (F475W, F625W, and F775W) mimic the real Sloan filters (g, r, and i).

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Step 1 - Find fields with both HSC and SDSS data

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For the F625W and F775W filters, the field of 3C58 (RA=02:05:42.05, Dec. = +64:48:38.8) has the necessary data.

Step 2 - Generate the HSC catalogs using the MAST Discovery Portal

Use the pull down menu under Select Collection to choose the HSC (blue). Enter the coordinates (from above) and search radius of 500s in the Search box (green); note that you will need to do this for each field. Perform the search by just hitting a carriage return or by clicking on the icon (orange). The results are displayed in the List of Objects, while the AstroView window shows the objects against the DSS image.

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Scroll out to see all the columns. Note that for the first item (Match ID = 22146135), WFC3_F475W = 22.02 and PSF Flux(g) = 21.88.

Step 4 - Compare the WFC3 and Sloan filters

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