Discovery of very high energy γ-ray emission from the low-frequency-peaked bl lacertae object bl lacertae

J. Albert; E. Aliu; H. Anderhub; P. Antoranz; A. Armada; C. Baixeras; J. A. Barrio; H. Bartko; D. Bastieri; J. K. Becker; W. Bednarek; K. Berger; C. Bigongiari; A. Biland; R. K. Bock; P. Bordas; V. Bosch-Ramon; T. Bretz; I. Britvitch; M. Camara; E. Carmona; A. Chilingarian; J. A. Coarasa; S. Commichau; J. L. Contreras; J. Cortina; M. T. Costado; V. Curtef; V. Danielyan; F. Dazzi; A. De Angelis; C. Delgado; R. De Los Reyes; B. De Lotto; E. Domingo-Santamaría; D. Dorner; M. Doro; M. Errando; M. Fagiolini; D. Ferenc; E. Fernández; R. Firpo; J. Flix; M. V. Fonseca; L. Font; M. Fuchs; N. Galante; R. García-López; M. Garczarczyk; M. Gaug; M. Giller; F. Goebel; D. Hakobyan; M. Hayashida; T. Hengstebeck; A. Herrero; D. Höhne; J. Hose; C. C. Hsu; P. Jacon; T. Jogler; R. Kosyra; D. Kranich; R. Kritzer; A. Laille; E. Lindfors; S. Lombardi; F. Longo; J. López; M. López; E. Lorenz; P. Majumdar; G. Maneva; K. Mannheim; O. Mansutti; M. Mariotti; M. Martínez; D. Mazin; C. Merck; M. Meucci; M. Meyer; J. M. Miranda; R. Mirzoyan; S. Mizobuchi; A. Moralejo; K. Nilsson; J. Ninkovic; E. Oña-Wilhelmi; N. Otte; I. Oya; D. Paneque; M. Panniello; R. Paoletti; J. M. Paredes; M. Pasanen; D. Pascoli; F. Pauss; R. Pegna; M. Persic; L. Peruzzo

doi:10.1086/521550

Discovery of very high energy γ-ray emission from the low-frequency-peaked bl lacertae object bl lacertae

J. Albert, E. Aliu, H. Anderhub, P. Antoranz, A. Armada, C. Baixeras, J. A. Barrio, H. Bartko, D. Bastieri, J. K. Becker, W. Bednarek, K. Berger, C. Bigongiari, A. Biland, R. K. Bock, P. Bordas, V. Bosch-Ramon, T. Bretz, I. Britvitch, M. CamaraE. Carmona, A. Chilingarian, J. A. Coarasa, S. Commichau, J. L. Contreras, J. Cortina, M. T. Costado, V. Curtef, V. Danielyan, F. Dazzi, A. De Angelis, C. Delgado, R. De Los Reyes, B. De Lotto, E. Domingo-Santamaría, D. Dorner, M. Doro, M. Errando, M. Fagiolini, D. Ferenc, E. Fernández, R. Firpo, J. Flix, M. V. Fonseca, L. Font, M. Fuchs, N. Galante, R. García-López, M. Garczarczyk, M. Gaug, M. Giller, F. Goebel, D. Hakobyan, M. Hayashida, T. Hengstebeck, A. Herrero, D. Höhne, J. Hose, C. C. Hsu, P. Jacon, T. Jogler, R. Kosyra, D. Kranich, R. Kritzer, A. Laille, E. Lindfors, S. Lombardi, F. Longo, J. López, M. López, E. Lorenz, P. Majumdar, G. Maneva, K. Mannheim, O. Mansutti, M. Mariotti, M. Martínez, D. Mazin, C. Merck, M. Meucci, M. Meyer, J. M. Miranda, R. Mirzoyan, S. Mizobuchi, A. Moralejo, K. Nilsson, J. Ninkovic, E. Oña-Wilhelmi, N. Otte, I. Oya, D. Paneque, M. Panniello, R. Paoletti, J. M. Paredes, M. Pasanen, D. Pascoli, F. Pauss, R. Pegna, M. Persic, L. Peruzzo

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Resum

The MAGIC collaboration observed BL Lacertae for 22.2 hr during 2005 August to December and for 26 hr during 2006 July to September. The source is the historical prototype and eponym of a class of low-frequency-peaked BL Lacertae (LBL) objects. A very high energy (VHE) γ-ray signal was discovered with a 5.1 σ excess in the 2005 data. Above 200 GeV, an integral flux of (0.6 ± 0.2) × 10-11 cm-2 s-1 was measured, corresponding to approximately 3% of the Crab flux. The differential spectrum between 150 and 900 GeV is rather steep with a photon index of -3.6 ± 0.5. The light curve shows no significant variability during the observations in 2005. For the first time a clear detection of VHE γ-ray emission from an LBL object was obtained with a signal below previous upper limits. The 2006 data show no significant excess. This drop in flux follows the observed trend in optical activity. © 2007. The American Astronomical Society.

Idioma original	Anglès
Revista	Astrophysical Journal
Volum	666
Número	1 PART 2
DOIs	https://doi.org/10.1086/521550
Estat de la publicació	Publicada - 1 de gen. 2007

Accés al document

10.1086/521550

Com citar-ho

Albert, J., Aliu, E., Anderhub, H., Antoranz, P., Armada, A., Baixeras, C., Barrio, J. A., Bartko, H., Bastieri, D., Becker, J. K., Bednarek, W., Berger, K., Bigongiari, C., Biland, A., Bock, R. K., Bordas, P., Bosch-Ramon, V., Bretz, T., Britvitch, I., ... Peruzzo, L. (2007). Discovery of very high energy γ-ray emission from the low-frequency-peaked bl lacertae object bl lacertae. Astrophysical Journal, 666(1 PART 2). https://doi.org/10.1086/521550

@article{7d42729b3c174d5589c87daac30e574e,

title = "Discovery of very high energy γ-ray emission from the low-frequency-peaked bl lacertae object bl lacertae",

abstract = "The MAGIC collaboration observed BL Lacertae for 22.2 hr during 2005 August to December and for 26 hr during 2006 July to September. The source is the historical prototype and eponym of a class of low-frequency-peaked BL Lacertae (LBL) objects. A very high energy (VHE) γ-ray signal was discovered with a 5.1 σ excess in the 2005 data. Above 200 GeV, an integral flux of (0.6 ± 0.2) × 10-11 cm-2 s-1 was measured, corresponding to approximately 3% of the Crab flux. The differential spectrum between 150 and 900 GeV is rather steep with a photon index of -3.6 ± 0.5. The light curve shows no significant variability during the observations in 2005. For the first time a clear detection of VHE γ-ray emission from an LBL object was obtained with a signal below previous upper limits. The 2006 data show no significant excess. This drop in flux follows the observed trend in optical activity. {\textcopyright} 2007. The American Astronomical Society.",

keywords = "BL Lacertae objects: individual (BL Lacertae), Gamma rays: observations Online material: color figures",

author = "J. Albert and E. Aliu and H. Anderhub and P. Antoranz and A. Armada and C. Baixeras and Barrio, {J. A.} and H. Bartko and D. Bastieri and Becker, {J. K.} and W. Bednarek and K. Berger and C. Bigongiari and A. Biland and Bock, {R. K.} and P. Bordas and V. Bosch-Ramon and T. Bretz and I. Britvitch and M. Camara and E. Carmona and A. Chilingarian and Coarasa, {J. A.} and S. Commichau and Contreras, {J. L.} and J. Cortina and Costado, {M. T.} and V. Curtef and V. Danielyan and F. Dazzi and {De Angelis}, A. and C. Delgado and {De Los Reyes}, R. and {De Lotto}, B. and E. Domingo-Santamar{\'i}a and D. Dorner and M. Doro and M. Errando and M. Fagiolini and D. Ferenc and E. Fern{\'a}ndez and R. Firpo and J. Flix and Fonseca, {M. V.} and L. Font and M. Fuchs and N. Galante and R. Garc{\'i}a-L{\'o}pez and M. Garczarczyk and M. Gaug and M. Giller and F. Goebel and D. Hakobyan and M. Hayashida and T. Hengstebeck and A. Herrero and D. H{\"o}hne and J. Hose and Hsu, {C. C.} and P. Jacon and T. Jogler and R. Kosyra and D. Kranich and R. Kritzer and A. Laille and E. Lindfors and S. Lombardi and F. Longo and J. L{\'o}pez and M. L{\'o}pez and E. Lorenz and P. Majumdar and G. Maneva and K. Mannheim and O. Mansutti and M. Mariotti and M. Mart{\'i}nez and D. Mazin and C. Merck and M. Meucci and M. Meyer and Miranda, {J. M.} and R. Mirzoyan and S. Mizobuchi and A. Moralejo and K. Nilsson and J. Ninkovic and E. O{\~n}a-Wilhelmi and N. Otte and I. Oya and D. Paneque and M. Panniello and R. Paoletti and Paredes, {J. M.} and M. Pasanen and D. Pascoli and F. Pauss and R. Pegna and M. Persic and L. Peruzzo",

year = "2007",

month = jan,

day = "1",

doi = "10.1086/521550",

language = "English",

volume = "666",

journal = "Astrophysical Journal",

issn = "0004-637X",

number = "1 PART 2",

}

Albert, J, Aliu, E, Anderhub, H, Antoranz, P, Armada, A, Baixeras, C, Barrio, JA, Bartko, H, Bastieri, D, Becker, JK, Bednarek, W, Berger, K, Bigongiari, C, Biland, A, Bock, RK, Bordas, P, Bosch-Ramon, V, Bretz, T, Britvitch, I, Camara, M, Carmona, E, Chilingarian, A, Coarasa, JA, Commichau, S, Contreras, JL, Cortina, J, Costado, MT, Curtef, V, Danielyan, V, Dazzi, F, De Angelis, A, Delgado, C, De Los Reyes, R, De Lotto, B, Domingo-Santamaría, E, Dorner, D, Doro, M, Errando, M, Fagiolini, M, Ferenc, D, Fernández, E, Firpo, R, Flix, J, Fonseca, MV, Font, L, Fuchs, M, Galante, N, García-López, R, Garczarczyk, M, Gaug, M, Giller, M, Goebel, F, Hakobyan, D, Hayashida, M, Hengstebeck, T, Herrero, A, Höhne, D, Hose, J, Hsu, CC, Jacon, P, Jogler, T, Kosyra, R, Kranich, D, Kritzer, R, Laille, A, Lindfors, E, Lombardi, S, Longo, F, López, J, López, M, Lorenz, E, Majumdar, P, Maneva, G, Mannheim, K, Mansutti, O, Mariotti, M, Martínez, M, Mazin, D, Merck, C, Meucci, M, Meyer, M, Miranda, JM, Mirzoyan, R, Mizobuchi, S, Moralejo, A, Nilsson, K, Ninkovic, J, Oña-Wilhelmi, E, Otte, N, Oya, I, Paneque, D, Panniello, M, Paoletti, R, Paredes, JM, Pasanen, M, Pascoli, D, Pauss, F, Pegna, R, Persic, M & Peruzzo, L 2007, 'Discovery of very high energy γ-ray emission from the low-frequency-peaked bl lacertae object bl lacertae', Astrophysical Journal, vol. 666, núm. 1 PART 2. https://doi.org/10.1086/521550

TY - JOUR

T1 - Discovery of very high energy γ-ray emission from the low-frequency-peaked bl lacertae object bl lacertae

AU - Albert, J.

AU - Aliu, E.

AU - Anderhub, H.

AU - Antoranz, P.

AU - Armada, A.

AU - Baixeras, C.

AU - Barrio, J. A.

AU - Bartko, H.

AU - Bastieri, D.

AU - Becker, J. K.

AU - Bednarek, W.

AU - Berger, K.

AU - Bigongiari, C.

AU - Biland, A.

AU - Bock, R. K.

AU - Bordas, P.

AU - Bosch-Ramon, V.

AU - Bretz, T.

AU - Britvitch, I.

AU - Camara, M.

AU - Carmona, E.

AU - Chilingarian, A.

AU - Coarasa, J. A.

AU - Commichau, S.

AU - Contreras, J. L.

AU - Cortina, J.

AU - Costado, M. T.

AU - Curtef, V.

AU - Danielyan, V.

AU - Dazzi, F.

AU - De Angelis, A.

AU - Delgado, C.

AU - De Los Reyes, R.

AU - De Lotto, B.

AU - Domingo-Santamaría, E.

AU - Dorner, D.

AU - Doro, M.

AU - Errando, M.

AU - Fagiolini, M.

AU - Ferenc, D.

AU - Fernández, E.

AU - Firpo, R.

AU - Flix, J.

AU - Fonseca, M. V.

AU - Font, L.

AU - Fuchs, M.

AU - Galante, N.

AU - García-López, R.

AU - Garczarczyk, M.

AU - Gaug, M.

AU - Giller, M.

AU - Goebel, F.

AU - Hakobyan, D.

AU - Hayashida, M.

AU - Hengstebeck, T.

AU - Herrero, A.

AU - Höhne, D.

AU - Hose, J.

AU - Hsu, C. C.

AU - Jacon, P.

AU - Jogler, T.

AU - Kosyra, R.

AU - Kranich, D.

AU - Kritzer, R.

AU - Laille, A.

AU - Lindfors, E.

AU - Lombardi, S.

AU - Longo, F.

AU - López, J.

AU - López, M.

AU - Lorenz, E.

AU - Majumdar, P.

AU - Maneva, G.

AU - Mannheim, K.

AU - Mansutti, O.

AU - Mariotti, M.

AU - Martínez, M.

AU - Mazin, D.

AU - Merck, C.

AU - Meucci, M.

AU - Meyer, M.

AU - Miranda, J. M.

AU - Mirzoyan, R.

AU - Mizobuchi, S.

AU - Moralejo, A.

AU - Nilsson, K.

AU - Ninkovic, J.

AU - Oña-Wilhelmi, E.

AU - Otte, N.

AU - Oya, I.

AU - Paneque, D.

AU - Panniello, M.

AU - Paoletti, R.

AU - Paredes, J. M.

AU - Pasanen, M.

AU - Pascoli, D.

AU - Pauss, F.

AU - Pegna, R.

AU - Persic, M.

AU - Peruzzo, L.

PY - 2007/1/1

Y1 - 2007/1/1

N2 - The MAGIC collaboration observed BL Lacertae for 22.2 hr during 2005 August to December and for 26 hr during 2006 July to September. The source is the historical prototype and eponym of a class of low-frequency-peaked BL Lacertae (LBL) objects. A very high energy (VHE) γ-ray signal was discovered with a 5.1 σ excess in the 2005 data. Above 200 GeV, an integral flux of (0.6 ± 0.2) × 10-11 cm-2 s-1 was measured, corresponding to approximately 3% of the Crab flux. The differential spectrum between 150 and 900 GeV is rather steep with a photon index of -3.6 ± 0.5. The light curve shows no significant variability during the observations in 2005. For the first time a clear detection of VHE γ-ray emission from an LBL object was obtained with a signal below previous upper limits. The 2006 data show no significant excess. This drop in flux follows the observed trend in optical activity. © 2007. The American Astronomical Society.

AB - The MAGIC collaboration observed BL Lacertae for 22.2 hr during 2005 August to December and for 26 hr during 2006 July to September. The source is the historical prototype and eponym of a class of low-frequency-peaked BL Lacertae (LBL) objects. A very high energy (VHE) γ-ray signal was discovered with a 5.1 σ excess in the 2005 data. Above 200 GeV, an integral flux of (0.6 ± 0.2) × 10-11 cm-2 s-1 was measured, corresponding to approximately 3% of the Crab flux. The differential spectrum between 150 and 900 GeV is rather steep with a photon index of -3.6 ± 0.5. The light curve shows no significant variability during the observations in 2005. For the first time a clear detection of VHE γ-ray emission from an LBL object was obtained with a signal below previous upper limits. The 2006 data show no significant excess. This drop in flux follows the observed trend in optical activity. © 2007. The American Astronomical Society.

KW - BL Lacertae objects: individual (BL Lacertae)

KW - Gamma rays: observations Online material: color figures

U2 - 10.1086/521550

DO - 10.1086/521550

M3 - Article

SN - 0004-637X

VL - 666

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART 2

ER -

Discovery of very high energy γ-ray emission from the low-frequency-peaked bl lacertae object bl lacertae

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