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Discovery of Very High Energy γ-Rays from Markarian 180 Triggered by an Optical Outburst

Authors :
Albert, J.
Aliu, E.
Anderhub, H.
Antoranz, P.
Armada, A.
Asensio, M.
Baixeras, C.
Barrio, J. A.
Bartelt, M.
Bartko, H.
Bastieri, Denis
Bednarek, W.
Berger, K.
Bigongiari, C.
Biland, A.
Bisesi, E.
Bock, R. K.
Bordas, P.
BOSCH RAMON, V.
Bretz, T.
Britvitch, I.
Camara, M.
Carmona, E.
Chilingarian, A.
Ciprini, S.
Coarasa, J. A.
Commichau, S.
Contreras, J. L.
Cortina, J.
Curtef, V.
Danielyan, V.
Dazzi, Francesco
DE ANGELIS, A.
DE LOS REYES, R.
DE LOTTO, B.
DOMINGO SANTAMARIA, E.
Dorner, D.
Doro, Michele
Errando, M.
Fagiolini, M.
Ferenc, D.
Fernandez, E.
Firpo, R.
Flix, J.
Fonseca, M. V.
Font, L.
Fuchs, M.
Galante, N.
Garczarczyk, M.
Gaug, M.
Giller, M.
Goebel, F.
Hakobyan, D.
Hayashida, M.
Hengstebeck, T.
Hohne, D.
Hose, J.
Hsu, C. C.
Isar, P. G.
Jacon, P.
Kalekin, O.
Kosyra, R.
Kranich, D.
Laatiaoui, M.
Laille, A.
Lenisa, T.
Liebing, P.
Lindfors, E.
Lombardi, Saverio
Longo, F.
Lopez, J.
Lopez, M.
Lorenz, E.
Majumdar, P.
Maneva, G.
Mannheim, K.
Mansutti, O.
Mariotti, Mose'
Martinez, M.
Mase, K.
Daniel, Mazin
Merck, C.
Meucci, M.
Meyer, M.
Miranda, J. M.
Mirzoyan, R.
Mizobuchi, S.
Moralejo, A.
Nilsson, K.
Ninkovic, J.
ONA WILHELMI, E.
Orduna, R.
Otte, N.
Oya, I.
Paneque, D.
Paoletti, R.
Paredes, J. M.
Pasanen, M.
Pascoli, Donatella
Pauss, F.
Pavel, N.
Pegna, R.
Persic, M.
Peruzzo, Luigi
Piccioli, A.
Poller, M.
Prandini, Elisa
Raymers, A.
Rhode, W.
Ribo, M.
Rico, J.
Riegel, B.
Rissi, M.
Robert, A.
Rugamer, S.
Saggion, Antonio
Sanchez, A.
Sartori, Paolo
Scalzotto, VILLI MARIO
Scapin, V.
Schmitt, R.
Schweizer, T.
Shayduk, M.
Shinozaki, K.
Shore, S. N.
Sidro, N.
Sillanpaa, A.
Sobczynska, D.
Stamerra, A.
Stark, L. S.
Takalo, L.
Temnikov, P.
Tescaro, D.
Teshima, M.
Tonello, N.
Torres, A.
Torres, D. F.
Turini, N.
Vankov, H.
Vitale, V.
Wagner, R. M.
Wibig, T.
Wittek, W.
Zanin, R.
Zapatero, J.
J., Albert
E., Aliu
H., Anderhub
P., Antoranz
A., Armada
M., Asensio
C., Baixera
J. A., Barrio
H., Bartko
D., Bastieri
J., Becker
W., Bednarek
K., Berger
C., Bigongiari
A., Biland
E., Bisesi
R. K., Bock
P., Borda
V., Bosch Ramon
T., Bretz
I., Britvitch
M., Camara
E., Carmona
A., Chilingarian
S., Ciprini
J. A., Coarasa
S., Commichau
J. L., Contrera
J., Cortina
V., Curtef
V., Danielyan
F., Dazzi
Angelis, A.
Los, R.
Lotto, B.
E., Domingo Santamar\ia
D., Dorner
M., Doro
M., Errando
M., Fagiolini
D., Ferenc
E., Fernandez
R., Firpo
J., Flix
M. V., Fonseca
L., Font
M., Fuch
N., Galante
M., Garczarczyk
M., Gaug
M., Giller
F., Goebel
D., Hakobyan
M., Hayashida
T., Hengstebeck
D., H\ohne
J., Hose
C. C., Hsu
P., Jacon
O., Kalekin
R., Kosyra
D., Kranich
M., Laatiaoui
A., Laille
T., Lenisa
P., Liebing
E., Lindfor
S., Lombardi
Longo, Francesco
J., Lopez
M., Lopez
E., Lorenz
P., Majumdar
G., Maneva
K., Mannheim
O., Mansutti
M., Mariotti
M., Mart\inez
D., Mazin
C., Merck
M., Meucci
M., Meyer
J. M., Miranda
R., Mirzoyan
S., Mizobuchi
A., Moralejo
K., Nilsson
J., Ninkovic
E., O\~na Wilhelmi
R., Ordu\~na
N., Otte
I., Oya
D., Paneque
R., Paoletti
J. M., Parede
M., Pasanen
D., Pascoli
F., Pau
R., Pegna
M., Persic
L., Peruzzo
A., Piccioli
M., Poller
E., Prandini
A., Raymer
W., Rhode
M., Ribo
J., Rico
B., Riegel
M., Rissi
A., Robert
S., R\ugamer
A., Saggion
A., Sanchez
P., Sartori
V., Scalzotto
V., Scapin
R., Schmitt
T., Schweizer
M., Shayduk
K., Shinozaki
S. N., Shore
N., Sidro
A., Sillanp\a\a
D., Sobczynska
A., Stamerra
L. S., Stark
L., Takalo
P., Temnikov
D., Tescaro
M., Teshima
N., Tonello
A., Torre
D. F., Torre
N., Turini
H., Vankov
V., Vitale
R. M., Wagner
T., Wibig
W., Wittek
R., Zanin
J., Zapatero
Source :
Dipòsit Digital de la UB, Universidad de Barcelona, E-Prints Complutense: Archivo Institucional de la UCM, Universidad Complutense de Madrid, E-Prints Complutense. Archivo Institucional de la UCM, instname
Publication Year :
2006
Publisher :
American Astronomical Society, 2006.

Abstract

The high-frequency-peaked BL Lacertae object Markarian~180 (Mrk~180) was observed to have an optical outburst in 2006 March, triggering a Target of Opportunity observation with the MAGIC telescope. The source was observed for 12.4 hr and very high energy $\gamma$-ray emission was detected with a significance of 5.5 $\sigma$. An integral flux above 200 GeV of $(2.3\pm0.7)\times10^{-11} {cm}^{-2} {s}^{-1}$ was measured, corresponding to 11% of the Crab Nebula flux. A rather soft spectrum with a photon index of $-3.3\pm0.7$ has been determined. No significant flux variation was found.<br />Comment: Accepted by ApJ Letters, minor revisions

Subjects

Subjects :
BL Lacertae objects : individual (Markarian 180)
High energy
Photon
Astrophysics::High Energy Astrophysical Phenomena
individual (Markarian 180) [BL Lacertae objects]
Flux
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Raigs gamma
Observacions astronòmiques
Target of opportunity
gamma rays : observations
BL Lacertae Objects: Individual: Name: Markarian 180 [Galaxies]
Cosmic rays
Astrophysics::Galaxy Astrophysics
Galaxies: BL Lacertae Objects: Individual: Name: Markarian 180
Gamma Rays: Observations
Physics
gamma ray astronomy
IMAGING CHERENKOV DETECTOR
Observations [Gamma Rays]
Gamma rays
Gamma ray
Astronomy and Astrophysics
Crab Nebula
Space and Planetary Science
Electrónica
Física nuclear
Astrophysics::Earth and Planetary Astrophysics
Electricidad
Astronomical observations
BL Lac object

Details

ISSN :
15384357 and 0004637X
Volume :
648
Database :
OpenAIRE
Journal :
The Astrophysical Journal
Accession number :
edsair.doi.dedup.....86a70b2e90cc6b9432ab08e2a648506c

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