The projected galaxy 2PCFs and the corresponding covariance matrices for the HI-selected galaxies in ALFALFA70 catalog using 121 jackknife subsamples: (wp_* for measurements and wpcov_* for covariance matrices) 
Please refer to Guo et al.(2017) for more details

The columns for wp_* are: 
#1. rp, 12 logarithmic bins in units of Mpc/h, starting from 0.1 Mpc/h, with a bin size of \Delta\log(rp)=0.2 
#2. wp(rp), integrated along the line of sight to 20Mpc/h. 
#3. Error on wp, measured from 400 jackknife samples.

The covariance matrix for the measurements of wp(rp) in each wpcov_* file can be read as a two-dimentional array of 12 rows X 12 columns, i.e. cov(12,12).