STEP 4
- Download the HSC catalog for M87.
Go back to the HSC summary form, retain some of the previous parameters:
Target Name = M87
Radius = 5 arcmin
Mag Type = MagAper2
NumImages > 5
Maximum records = 5001
but change:
Output Coords = Decimal
Output Columns = Match ID, MatchRA, MatchDec, A_F814W, A_F814W_sigma, W2_F606W, W2_F606W_sigma, W2_814W, W2_814W_sigma, CI
Output Format = IRAF: space-separated w/INDEFs
Setting the output coordinates, columns and format is optional. You may prefer a different format or just use the defaults.
Note that both the A_F814W and W_814W observations have included since we will combine them in a later step. We check that the agreement between A_F814W and W_F814W is good enough to justify this approach in step 8.