Search for extraterrestrial point sources of neutrinos with AMANDA-II.
We present the results of a search for point sources of high-energy neutrinos in the northern hemisphere using AMANDA-II data collected in the year 2000. Included are flux limits on several active-galactic-nuclei blazars, microquasars, magnetars, and other candidate neutrino sources. A search for excesses above a random background of cosmic-ray-induced atmospheric neutrinos and misreconstructed downgoing cosmic-ray muons reveals no statistically significant neutrino point sources. We show that AMANDA-II has achieved the sensitivity required to probe known TeV gamma-ray sources such as the blazar Markarian 501 in its 1997 flaring state at a level where neutrino and gamma-ray fluxes are equal.
Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany.
J
J
Ahrens
X
X
Bai
S W
SW
Barwick
T
T
Becka
J K
JK
Becker
E
E
Bernardini
D
D
Bertrand
F
F
Binon
A
A
Biron
D J
DJ
Boersma
S
S
Böser
O
O
Botner
A
A
Bouchta
O
O
Bouhali
T
T
Burgess
S
S
Carius
T
T
Castermans
A
A
Chen
D
D
Chirkin
B
B
Collin
J
J
Conrad
J
J
Cooley
D F
DF
Cowen
A
A
Davour
C
C
De Clercq
T
T
DeYoung
P
P
Desiati
J P
JP
Dewulf
P
P
Ekström
T
T
Feser
T K
TK
Gaisser
R
R
Ganugapati
M
M
Gaug
H
H
Geenen
L
L
Gerhardt
A
A
Goldschmidt
A
A
Gross
A
A
Hallgren
F
F
Halzen
K
K
Hanson
R
R
Hardtke
T
T
Harenberg
T
T
Hauschildt
K
K
Helbing
M
M
Hellwig
P
P
Herquet
G C
GC
Hill
D
D
Hubert
B
B
Hughey
P O
PO
Hulth
K
K
Hultqvist
S
S
Hundertmark
J
J
Jacobsen
A
A
Karle
M
M
Kestel
L
L
Köpke
M
M
Kowalski
K
K
Kuehn
J I
JI
Lamoureux
H
H
Leich
M
M
Leuthold
P
P
Lindahl
I
I
Liubarsky
J
J
Madsen
K
K
Mandli
P
P
Marciniewski
H S
HS
Matis
C P
CP
McParland
T
T
Messarius
Y
Y
Minaeva
P
P
Miocinović
R
R
Morse
K
K
Münich
R
R
Nahnhauer
T
T
Neunhöffer
P
P
Niessen
D R
DR
Nygren
H
H
Ogelman
Ph
P
Olbrechts
C
C
Pérez de los Heros
A C
AC
Pohl
R
R
Porrata
P B
PB
Price
G T
GT
Przybylski
K
K
Rawlins
E
E
Resconi
W
W
Rhode
M
M
Ribordy
S
S
Richter
J
J
Rodríguez Martino
H G
HG
Sander
K
K
Schinarakis
S
S
Schlenstedt
T
T
Schmidt
D
D
Schneider
R
R
Schwarz
A
A
Silvestri
M
M
Solarz
G M
GM
Spiczak
C
C
Spiering
M
M
Stamatikos
D
D
Steele
P
P
Steffen
R G
RG
Stokstad
K H
KH
Sulanke
I
I
Taboada
L
L
Thollander
S
S
Tilav
W
W
Wagner
C
C
Walck
Y R
YR
Wang
C H
CH
Wiebusch
C
C
Wiedemann
R
R
Wischnewski
H
H
Wissing
K
K
Woschnagg
G
G
Yodh