The Nature and Orbit of the Ophiuchus Stream

The *chain.txt files contain Markov chains that model the line-of-sight velocity (RV_chains.txt), color-magnitude diagram (CMD_chains.txt), and proper motion and the extent of the Ophiuchus stellar stream (PM_chains.txt). By randomly selecting rows from these files, one can sample the corresponding probability density functions.The columns in each file are briefly described below. RV_chains.txt:     column 1: line-of-sight velocity at {ell}_0=5deg,     column 2: gradient in line-of-sight velocity, d(v_los)/d({ell})     column 3: additional scatter in line-of-sight velocities, s CMD_chains.txt:     column 1: age, t     column 2: mass-loss parameter, eta     column 3: metallicity content, Z     column 4: offset in reddening with respect to the Schlegel et al. (1998)               [1998ApJ...500..525S] reddening, (E(B-V)_off)     column 5: distance modulus at {ell}_0=5deg,     column 6: gradient distance modulus, d(DM)/d({ell})     columns 7-11: uncertainty in isochrone magnitudes, {sigma}_iso_m,               where m=[g,r,i,z,y,] PM_chains.txt:     column 1: fraction of stars associated with the field population, 1-f     column 2: natural logarithm of the width of the stream in the               galactic latitude direction, ln({sigma}_b)     column 3: natural logarithm of the width of the field population in the               galactic latitude direction, ln({sigma}_p_b)     column 4: A_p     column 5: B_p     column 6: ln({sigma}_pm)     column 7: ln({sigma}_p_pm)     column 8: <{mu}}>     column 9: d({mu{ell})/d({ell})     column 10: <{mu}_b>     column 11: d({mu}_b)/d({ell})     column 12: <{mu}_p}>     column 13: d({mup_max     column 18: A     column 19: B     column 20: C  })/d({ell})     column 14: <{mu}_p_b>     column 15: d({mu}_p_b)/d({ell})     column 16: {ell}_min     column 17: {ell