Using a redshift survey of 1323 galaxies (1092 new or remeasured) in a region
of 95 square degrees centered on the nearby galaxy cluster Abell 2199, we
analyze the supercluster containing A2199, A2197, and an X-ray group. The
caustic technique accurately reproduces the true mass profiles of simulated
simple superclusters (i.e., superclusters where the virial mass of one cluster
is 2-10 times the virial mass of all other clusters in the supercluster). We
calculate the masses of the two main components of A2197 (A2197W and A2197E)
using archival X-ray observations and demonstrate that the A2199 supercluster
is simple and thus that the caustic technique should yield an accurate mass
profile. The mass profile is uncertain by ~30% within 3 Mpc/h and by a factor
of two within 8 Mpc/h and is one of only a few for a supercluster on such large
scales. Independent X-ray mass estimates agree with our results at all radii
where they overlap. The mass profile strongly disagrees with an isothermal
sphere profile but agrees with profiles suggested by simulations. We discuss
the interplay of the supercluster dynamics and the dynamics of the bound
subclusters. The agreement between the infall mass profile and other techniques
shows that the caustic technique is surprisingly robust for simple
superclusters (abridged).Comment: 49 pages, 20 figures, to appear in The Astronomical Journal, version
containing high-resolution figures available at
http://cfa-www.harvard.edu/~krines/a2199mp.p
