<s>
Astronomer	O
Jerry	B-Error_Name
R	I-Error_Name
.	I-Error_Name
Ehman	I-Error_Name
discovered	O
the	O
anomaly	O
a	O
few	O
days	O
later	O
while	O
reviewing	O
the	O
recorded	O
data	O
.	O
</s>
<s>
He	O
was	O
so	O
impressed	O
by	O
the	O
result	O
that	O
he	O
circled	O
on	O
the	O
computer	O
printout	O
the	O
reading	O
of	O
the	O
signal	O
's	O
intensity	O
,	O
"	O
6EQUJ5	B-Error_Name
"	O
,	O
and	O
wrote	O
the	O
comment	O
"	O
Wow	O
!	O
"	O
</s>
<s>
signal	O
had	O
no	O
detectable	O
modulation	B-Application
—	O
a	O
technique	O
used	O
to	O
transmit	O
information	O
over	O
radio	O
waves	O
—	O
it	O
remains	O
the	O
strongest	O
candidate	O
for	O
an	O
extraterrestrial	O
radio	O
transmission	O
ever	O
detected	O
.	O
</s>
<s>
By	O
1977	O
,	O
Ehman	O
was	O
working	O
at	O
the	O
SETI	O
project	O
as	O
a	O
volunteer	O
;	O
his	O
job	O
involved	O
analyzing	O
by	O
hand	O
large	O
amounts	O
of	O
data	O
processed	O
by	O
an	O
IBM	B-Device
1130	I-Device
computer	O
and	O
recorded	O
on	O
line	O
printer	O
paper	O
.	O
</s>
<s>
The	O
string	O
6EQUJ5	B-Error_Name
,	O
commonly	O
misinterpreted	O
as	O
a	O
message	O
encoded	O
in	O
the	O
radio	O
signal	O
,	O
represents	O
in	O
fact	O
the	O
signal	O
's	O
intensity	O
variation	O
over	O
time	O
,	O
expressed	O
in	O
the	O
particular	O
measuring	O
system	O
adopted	O
for	O
the	O
experiment	O
.	O
</s>
<s>
The	O
signal	O
itself	O
appeared	O
to	O
be	O
an	O
unmodulated	O
continuous	O
wave	O
,	O
although	O
any	O
modulation	B-Application
with	O
a	O
period	O
of	O
less	O
than	O
10	O
seconds	O
or	O
longer	O
than	O
72	O
seconds	O
would	O
not	O
have	O
been	O
detectable	O
.	O
</s>
<s>
The	O
signal	O
was	O
sampled	B-Algorithm
for	O
10	O
seconds	O
and	O
then	O
processed	O
by	O
the	O
computer	O
,	O
which	O
took	O
2	O
seconds	O
.	O
</s>
<s>
The	O
result	O
for	O
each	O
frequency	O
channel	O
was	O
output	O
on	O
the	O
printout	O
as	O
a	O
single	O
alphanumeric	O
character	O
,	O
representing	O
the	O
10-second	O
average	O
intensity	O
,	O
minus	O
the	O
baseline	O
,	O
expressed	O
as	O
a	O
dimensionless	O
multiple	O
of	O
the	O
signal	O
's	O
standard	B-General_Concept
deviation	I-General_Concept
.	O
</s>
<s>
In	O
this	O
particular	O
intensity	O
scale	O
,	O
a	O
space	O
character	O
denoted	O
an	O
intensity	O
between	O
0	O
and	O
1	O
,	O
that	O
is	O
between	O
baseline	O
and	O
one	O
standard	B-General_Concept
deviation	I-General_Concept
above	O
it	O
.	O
</s>
<s>
signal	O
's	O
highest	O
measured	O
value	O
was	O
"	O
U	O
"	O
(	O
an	O
intensity	O
between	O
30	O
and	O
31	O
)	O
,	O
that	O
is	O
thirty	O
standard	B-General_Concept
deviations	I-General_Concept
above	O
background	O
noise	O
.	O
</s>
<s>
This	O
is	O
(	O
)	O
above	O
the	O
hydrogen	O
line	O
value	O
(	O
with	O
no	O
red	B-Application
-	I-Application
or	O
blue-shift	O
)	O
of	O
.	O
</s>
<s>
signal	O
had	O
a	O
bandwidth	B-Algorithm
of	O
less	O
than	O
.	O
</s>
<s>
It	O
is	O
considered	O
narrowband	O
emission	O
in	O
the	O
sense	O
that	O
its	O
fractional	O
bandwidth	B-Algorithm
was	O
relatively	O
small	O
(	O
~	O
1%	O
)	O
.	O
</s>
<s>
However	O
,	O
the	O
bandwidth	B-Algorithm
is	O
not	O
small	O
compared	O
to	O
the	O
bandwidth	B-Algorithm
of	O
some	O
astrophysical	O
masers	O
(	O
~	O
)	O
or	O
to	O
the	O
frequency	O
resolution	O
of	O
modern	O
narrowband	O
SETI	O
searches	O
(	O
~	O
)	O
.	O
</s>
<s>
In	O
2017	O
,	O
Antonio	O
Paris	O
,	O
Assistant	O
Professor	O
of	O
Astronomy	O
and	O
Astrophysics	O
at	O
St.	O
Petersburg	O
College	O
,	O
Florida	O
,	O
proposed	O
that	O
the	O
hydrogen	O
cloud	O
surrounding	O
two	O
comets	B-Language
,	O
266P/Christensen	O
and	O
335P/Gibbs	O
,	O
now	O
known	O
to	O
have	O
been	O
in	O
the	O
same	O
region	O
of	O
the	O
sky	O
,	O
could	O
have	O
been	O
the	O
source	O
of	O
the	O
Wow	O
!	O
</s>
<s>
This	O
hypothesis	O
was	O
dismissed	O
by	O
astronomers	O
,	O
including	O
members	O
of	O
the	O
original	O
Big	O
Ear	O
research	O
team	O
,	O
as	O
the	O
cited	O
comets	B-Language
were	O
not	O
in	O
the	O
beam	O
at	O
the	O
correct	O
time	O
.	O
</s>
<s>
Furthermore	O
,	O
comets	B-Language
do	O
not	O
emit	O
strongly	O
at	O
the	O
frequencies	O
involved	O
,	O
and	O
there	O
is	O
no	O
explanation	O
for	O
why	O
a	O
comet	B-Language
would	O
be	O
observed	O
in	O
one	O
beam	O
but	O
not	O
in	O
the	O
other	O
.	O
</s>
<s>
The	O
transmission	O
consisted	O
of	O
approximately	O
10,000	O
Twitter	B-Application
messages	O
solicited	O
for	O
the	O
purpose	O
by	O
the	O
National	O
Geographic	O
Channel	O
,	O
bearing	O
the	O
hashtag	O
"	O
#ChasingUFOs	O
"	O
(	O
a	O
promotion	O
for	O
one	O
of	O
the	O
channel	O
's	O
TV	O
series	O
)	O
.	O
</s>
<s>
To	O
increase	O
the	O
probability	O
that	O
any	O
extraterrestrial	O
recipients	O
would	O
recognize	O
the	O
signal	O
as	O
an	O
intentional	O
communication	O
from	O
another	O
intelligent	O
life	O
form	O
,	O
Arecibo	O
scientists	O
attached	O
a	O
repeating-sequence	O
header	B-General_Concept
to	O
each	O
individual	O
message	O
,	O
and	O
beamed	O
the	O
transmission	O
at	O
roughly	O
20	O
times	O
the	O
power	O
of	O
the	O
most	O
powerful	O
commercial	O
radio	O
transmitter	O
.	O
</s>
<s>
In	O
a	O
2017	O
Super	O
Bowl	O
commercial	O
from	O
Avocados	O
From	O
Mexico	O
spoofing	O
conspiracy	O
theories	O
such	O
as	O
the	O
Moon	O
landing	O
hoax	O
,	O
Area	B-Application
51	I-Application
,	O
and	O
subliminal	O
advertising	O
,	O
the	O
base	O
of	O
a	O
stone	O
monolith	O
carries	O
the	O
inscription	O
"	O
6EQUJ5	B-Error_Name
"	O
.	O
</s>
<s>
"	O
6EQUJ5	B-Error_Name
"	O
is	O
the	O
title	O
of	O
the	O
first	O
track	O
on	O
Carbon	O
Based	O
Lifeforms	O
2021	O
album	O
Stochastic	O
.	O
</s>
