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You may also take a look at the source code.
The networks in this dataset can be loaded directly from graph-tool with:
import graph_tool.all as gt
g = gt.collection.ns["arxiv_citation/HepPh"]
(and likewise for the other networks available.)

arxiv_citation — arXiv citation networks (1993-2003)


Citations among papers posted on arxiv.org under the hep-ph and hep-th categories, between 1993 and 2003. This time begins a few months after axiv was launched. If a paper i cites a paper j also in this data set, then a directed edge connects i to j. (Papers not in the data set are excluded.) These data were originally released as part of the 2003 KDD Cup.1

  1. Description obtained from the ICON project. 

Informational Citation Unweighted
Upstream URL OK
Tip: click on the table header to sort the list. Hover your mouse over it to obtain a legend.
Name Nodes Edges $\left<k\right>$ $\sigma_k$ $\lambda_h$ $\tau$ $r$ $c$ $\oslash$ $S$ Kind Mode NPs EPs gt GraphML GML csv
HepPh 34,546 421,578 12.20 30.90 74.33 63.13 -0.01 0.15 14 1.00 Directed Unipartite name date 1.3 MiB 2.4 MiB 2.4 MiB 1.9 MiB
HepTh 27,770 352,807 12.70 45.34 106.83 53.89 -0.03 0.12 15 0.99 Directed Unipartite name date 960 KiB 1.9 MiB 1.9 MiB 1.5 MiB
HepPh drawing
HepTh drawing