1) there are about 134,824 objects in DR7 directory in Canis; however, there are only less than 100,000 in the list catalogue "x.dat090616". I need the M_i for the rest of the them.
so either I have to use the small sample or if I have to use the big sample then I need to calculate the M_i the same way they have calculated for DR7 catalogue.
Pat says: leave the duplicted spectra for now. so we use pbh_dr7ANDhw10_dr7qzHW file from http://ara.phys.yorku.ca
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