This is BibTeX, Version 0.99d (TeX Live 2012)
Capacity: max_strings=35307, hash_size=35307, hash_prime=30011
The top-level auxiliary file: shockpaper.aux
The style file: apj.bst
Database file #1: hess_references.bib
Warning--string name "a16" is undefined
--line 3858 of file hess_references.bib
Warning--string name "a13" is undefined
--line 4546 of file hess_references.bib
You've used 34 entries,
            2947 wiz_defined-function locations,
            949 strings with 13811 characters,
and the built_in function-call counts, 19652 in all, are:
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> -- 1730
< -- 12
+ -- 636
- -- 600
* -- 1866
:= -- 3760
add.period$ -- 34
call.type$ -- 34
change.case$ -- 336
chr.to.int$ -- 34
cite$ -- 34
duplicate$ -- 640
empty$ -- 933
format.name$ -- 714
if$ -- 3689
int.to.chr$ -- 1
int.to.str$ -- 1
missing$ -- 34
newline$ -- 106
num.names$ -- 136
pop$ -- 355
preamble$ -- 1
purify$ -- 336
quote$ -- 0
skip$ -- 555
stack$ -- 0
substring$ -- 758
swap$ -- 0
text.length$ -- 0
text.prefix$ -- 0
top$ -- 0
type$ -- 306
warning$ -- 0
while$ -- 136
width$ -- 0
write$ -- 343
(There were 2 warnings)