Detection of the γ-ray binary LSI +61°303 in a low-flux state at very high energy γ-rays with the magic telescopes in 2009

J. Aleksić; E. A. Alvarez; L. A. Antonelli; P. Antoranz; M. Asensio; M. Backes; J. A. Barrio; D. Bastieri; J. Becerra Gonzlez; W. Bednarek; A. Berdyugin; K. Berger; E. Bernardini; A. Biland; O. Blanch; R. K. Bock; A. Boller; G. Bonnoli; D. Borla Tridon; V. Bosch-Ramon; I. Braun; T. Bretz; A. Cãellas; E. Carmona; A. Carosi; P. Colin; E. Colombo; J. L. Contreras; J. Cortina; L. Cossio; S. Covino; F. Dazzi; A. De Angelis; G. De Caneva; E. De Cea Del Pozo; B. De Lotto; C. Delgado Mendez; A. Diago Ortega; M. Doert; A. Domínguez; D. Dominis Prester; D. Dorner; M. Doro; D. Elsaesser; D. Ferenc; M. V. Fonseca; L. Font; C. Fruck; R. J. García López; M. Garczarczyk; D. Garrido; G. Giavitto; N. Godinović; D. Hadasch; D. Häfner; A. Herrero; D. Hildebrand; D. Höhne-Mönch; J. Hose; D. Hrupec; B. Huber; T. Jogler; H. Kellermann; S. Klepser; T. Krähenbühl; J. Krause; A. La Barbera; D. Lelas; E. Leonardo; E. Lindfors; S. Lombardi; A. López; M. López; E. Lorenz; M. Makariev; G. Maneva; N. Mankuzhiyil; K. Mannheim; L. Maraschi; M. Mariotti; M. Martínez; D. Mazin; M. Meucci; J. M. Miranda; R. Mirzoyan; H. Miyamoto; J. Moldón; A. Moralejo; P. Munar-Adrover; D. Nieto; K. Nilsson; R. Orito; I. Oya; D. Paneque; R. Paoletti; S. Pardo; J. M. Paredes; S. Partini; M. Pasanen; F. Pauss

doi:10.1088/0004-637X/746/1/80

Detection of the γ-ray binary LSI +61°303 in a low-flux state at very high energy γ-rays with the magic telescopes in 2009

J. Aleksić, E. A. Alvarez, L. A. Antonelli, P. Antoranz, M. Asensio, M. Backes, J. A. Barrio, D. Bastieri, J. Becerra Gonzlez, W. Bednarek, A. Berdyugin, K. Berger, E. Bernardini, A. Biland, O. Blanch, R. K. Bock, A. Boller, G. Bonnoli, D. Borla Tridon, V. Bosch-RamonI. Braun, T. Bretz, A. Cãellas, E. Carmona, A. Carosi, P. Colin, E. Colombo, J. L. Contreras, J. Cortina, L. Cossio, S. Covino, F. Dazzi, A. De Angelis, G. De Caneva, E. De Cea Del Pozo, B. De Lotto, C. Delgado Mendez, A. Diago Ortega, M. Doert, A. Domínguez, D. Dominis Prester, D. Dorner, M. Doro, D. Elsaesser, D. Ferenc, M. V. Fonseca, L. Font, C. Fruck, R. J. García López, M. Garczarczyk, D. Garrido, G. Giavitto, N. Godinović, D. Hadasch, D. Häfner, A. Herrero, D. Hildebrand, D. Höhne-Mönch, J. Hose, D. Hrupec, B. Huber, T. Jogler, H. Kellermann, S. Klepser, T. Krähenbühl, J. Krause, A. La Barbera, D. Lelas, E. Leonardo, E. Lindfors, S. Lombardi, A. López, M. López, E. Lorenz, M. Makariev, G. Maneva, N. Mankuzhiyil, K. Mannheim, L. Maraschi, M. Mariotti, M. Martínez, D. Mazin, M. Meucci, J. M. Miranda, R. Mirzoyan, H. Miyamoto, J. Moldón, A. Moralejo, P. Munar-Adrover, D. Nieto, K. Nilsson, R. Orito, I. Oya, D. Paneque, R. Paoletti, S. Pardo, J. M. Paredes, S. Partini, M. Pasanen, F. Pauss

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We present very high energy (E > 100GeV) γ-ray observations of the γ-ray binary system LS I +61°303 obtained with the MAGIC stereo system between 2009 October and 2010 January. We detect a 6.3σ γ-ray signal above 400GeV in the combined data set. The integral flux above an energy of 300GeV is F(E > 300 GeV) = (1.4 ± 0.3stat ± 0.4syst) × 10-12 cm-2 s-1, which corresponds to about 1.3% of the Crab Nebula flux in the same energy range. The orbit-averaged flux of LS I +61°303 in the orbital phase interval 0.6-0.7, where a maximum of the TeV flux is expected, is lower by almost an order of magnitude compared to our previous measurements between 2005 September and 2008 January. This provides evidence for a new low-flux state in LS I +61°303. We find that the change to the low-flux state cannot be solely explained by an increase of photon-photon absorption around the compact star. © 2012. The American Astronomical Society. All rights reserved.

Idioma original	Anglès
Número d’article	80
Revista	Astrophysical Journal
Volum	746
Número	1
DOIs	https://doi.org/10.1088/0004-637X/746/1/80
Estat de la publicació	Publicada - 10 de febr. 2012

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10.1088/0004-637X/746/1/80

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https://www.scopus.com/pages/publications/84856304560

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Aleksić, J., Alvarez, E. A., Antonelli, L. A., Antoranz, P., Asensio, M., Backes, M., Barrio, J. A., Bastieri, D., Becerra Gonzlez, J., Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Borla Tridon, D., ... Pauss, F. (2012). Detection of the γ-ray binary LSI +61°303 in a low-flux state at very high energy γ-rays with the magic telescopes in 2009. Astrophysical Journal, 746(1), Article 80. https://doi.org/10.1088/0004-637X/746/1/80

@article{59f35ebb66c947dea938a949b8616d5d,

title = "Detection of the γ-ray binary LSI +61°303 in a low-flux state at very high energy γ-rays with the magic telescopes in 2009",

abstract = "We present very high energy (E > 100GeV) γ-ray observations of the γ-ray binary system LS I +61°303 obtained with the MAGIC stereo system between 2009 October and 2010 January. We detect a 6.3σ γ-ray signal above 400GeV in the combined data set. The integral flux above an energy of 300GeV is F(E > 300 GeV) = (1.4 ± 0.3stat ± 0.4syst) × 10-12 cm-2 s-1, which corresponds to about 1.3\% of the Crab Nebula flux in the same energy range. The orbit-averaged flux of LS I +61°303 in the orbital phase interval 0.6-0.7, where a maximum of the TeV flux is expected, is lower by almost an order of magnitude compared to our previous measurements between 2005 September and 2008 January. This provides evidence for a new low-flux state in LS I +61°303. We find that the change to the low-flux state cannot be solely explained by an increase of photon-photon absorption around the compact star. {\textcopyright} 2012. The American Astronomical Society. All rights reserved.",

keywords = "binaries: general, gamma rays: general, X-rays: binaries",

author = "J. Aleksi{\'c} and Alvarez, \{E. A.\} and Antonelli, \{L. A.\} and P. Antoranz and M. Asensio and M. Backes and Barrio, \{J. A.\} and D. Bastieri and \{Becerra Gonzlez\}, J. and W. Bednarek and A. Berdyugin and K. Berger and E. Bernardini and A. Biland and O. Blanch and Bock, \{R. K.\} and A. Boller and G. Bonnoli and \{Borla Tridon\}, D. and V. Bosch-Ramon and I. Braun and T. Bretz and A. C{\~a}ellas and E. Carmona and A. Carosi and P. Colin and E. Colombo and Contreras, \{J. L.\} and J. Cortina and L. Cossio and S. Covino and F. Dazzi and \{De Angelis\}, A. and \{De Caneva\}, G. and \{De Cea Del Pozo\}, E. and \{De Lotto\}, B. and \{Delgado Mendez\}, C. and \{Diago Ortega\}, A. and M. Doert and A. Dom{\'i}nguez and \{Dominis Prester\}, D. and D. Dorner and M. Doro and D. Elsaesser and D. Ferenc and Fonseca, \{M. V.\} and L. Font and C. Fruck and \{Garc{\'i}a L{\'o}pez\}, \{R. J.\} and M. Garczarczyk and D. Garrido and G. Giavitto and N. Godinovi{\'c} and D. Hadasch and D. H{\"a}fner and A. Herrero and D. Hildebrand and D. H{\"o}hne-M{\"o}nch and J. Hose and D. Hrupec and B. Huber and T. Jogler and H. Kellermann and S. Klepser and T. Kr{\"a}henb{\"u}hl and J. Krause and \{La Barbera\}, A. and D. Lelas and E. Leonardo and E. Lindfors and S. Lombardi and A. L{\'o}pez and M. L{\'o}pez and E. Lorenz and M. Makariev and G. Maneva and N. Mankuzhiyil and K. Mannheim and L. Maraschi and M. Mariotti and M. Mart{\'i}nez and D. Mazin and M. Meucci and Miranda, \{J. M.\} and R. Mirzoyan and H. Miyamoto and J. Mold{\'o}n and A. Moralejo and P. Munar-Adrover and D. Nieto and K. Nilsson and R. Orito and I. Oya and D. Paneque and R. Paoletti and S. Pardo and Paredes, \{J. M.\} and S. Partini and M. Pasanen and F. Pauss",

year = "2012",

month = feb,

day = "10",

doi = "10.1088/0004-637X/746/1/80",

language = "English",

volume = "746",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

Aleksić, J, Alvarez, EA, Antonelli, LA, Antoranz, P, Asensio, M, Backes, M, Barrio, JA, Bastieri, D, Becerra Gonzlez, J, Bednarek, W, Berdyugin, A, Berger, K, Bernardini, E, Biland, A, Blanch, O, Bock, RK, Boller, A, Bonnoli, G, Borla Tridon, D, Bosch-Ramon, V, Braun, I, Bretz, T, Cãellas, A, Carmona, E, Carosi, A, Colin, P, Colombo, E, Contreras, JL, Cortina, J, Cossio, L, Covino, S, Dazzi, F, De Angelis, A, De Caneva, G, De Cea Del Pozo, E, De Lotto, B, Delgado Mendez, C, Diago Ortega, A, Doert, M, Domínguez, A, Dominis Prester, D, Dorner, D, Doro, M, Elsaesser, D, Ferenc, D, Fonseca, MV, Font, L, Fruck, C, García López, RJ, Garczarczyk, M, Garrido, D, Giavitto, G, Godinović, N, Hadasch, D, Häfner, D, Herrero, A, Hildebrand, D, Höhne-Mönch, D, Hose, J, Hrupec, D, Huber, B, Jogler, T, Kellermann, H, Klepser, S, Krähenbühl, T, Krause, J, La Barbera, A, Lelas, D, Leonardo, E, Lindfors, E, Lombardi, S, López, A, López, M, Lorenz, E, Makariev, M, Maneva, G, Mankuzhiyil, N, Mannheim, K, Maraschi, L, Mariotti, M, Martínez, M, Mazin, D, Meucci, M, Miranda, JM, Mirzoyan, R, Miyamoto, H, Moldón, J, Moralejo, A, Munar-Adrover, P, Nieto, D, Nilsson, K, Orito, R, Oya, I, Paneque, D, Paoletti, R, Pardo, S, Paredes, JM, Partini, S, Pasanen, M & Pauss, F 2012, 'Detection of the γ-ray binary LSI +61°303 in a low-flux state at very high energy γ-rays with the magic telescopes in 2009', Astrophysical Journal, vol. 746, núm. 1, 80. https://doi.org/10.1088/0004-637X/746/1/80

TY - JOUR

T1 - Detection of the γ-ray binary LSI +61°303 in a low-flux state at very high energy γ-rays with the magic telescopes in 2009

AU - Aleksić, J.

AU - Alvarez, E. A.

AU - Antonelli, L. A.

AU - Antoranz, P.

AU - Asensio, M.

AU - Backes, M.

AU - Barrio, J. A.

AU - Bastieri, D.

AU - Becerra Gonzlez, J.

AU - Bednarek, W.

AU - Berdyugin, A.

AU - Berger, K.

AU - Bernardini, E.

AU - Biland, A.

AU - Blanch, O.

AU - Bock, R. K.

AU - Boller, A.

AU - Bonnoli, G.

AU - Borla Tridon, D.

AU - Bosch-Ramon, V.

AU - Braun, I.

AU - Bretz, T.

AU - Cãellas, A.

AU - Carmona, E.

AU - Carosi, A.

AU - Colin, P.

AU - Colombo, E.

AU - Contreras, J. L.

AU - Cortina, J.

AU - Cossio, L.

AU - Covino, S.

AU - Dazzi, F.

AU - De Angelis, A.

AU - De Caneva, G.

AU - De Cea Del Pozo, E.

AU - De Lotto, B.

AU - Delgado Mendez, C.

AU - Diago Ortega, A.

AU - Doert, M.

AU - Domínguez, A.

AU - Dominis Prester, D.

AU - Dorner, D.

AU - Doro, M.

AU - Elsaesser, D.

AU - Ferenc, D.

AU - Fonseca, M. V.

AU - Font, L.

AU - Fruck, C.

AU - García López, R. J.

AU - Garczarczyk, M.

AU - Garrido, D.

AU - Giavitto, G.

AU - Godinović, N.

AU - Hadasch, D.

AU - Häfner, D.

AU - Herrero, A.

AU - Hildebrand, D.

AU - Höhne-Mönch, D.

AU - Hose, J.

AU - Hrupec, D.

AU - Huber, B.

AU - Jogler, T.

AU - Kellermann, H.

AU - Klepser, S.

AU - Krähenbühl, T.

AU - Krause, J.

AU - La Barbera, A.

AU - Lelas, D.

AU - Leonardo, E.

AU - Lindfors, E.

AU - Lombardi, S.

AU - López, A.

AU - López, M.

AU - Lorenz, E.

AU - Makariev, M.

AU - Maneva, G.

AU - Mankuzhiyil, N.

AU - Mannheim, K.

AU - Maraschi, L.

AU - Mariotti, M.

AU - Martínez, M.

AU - Mazin, D.

AU - Meucci, M.

AU - Miranda, J. M.

AU - Mirzoyan, R.

AU - Miyamoto, H.

AU - Moldón, J.

AU - Moralejo, A.

AU - Munar-Adrover, P.

AU - Nieto, D.

AU - Nilsson, K.

AU - Orito, R.

AU - Oya, I.

AU - Paneque, D.

AU - Paoletti, R.

AU - Pardo, S.

AU - Paredes, J. M.

AU - Partini, S.

AU - Pasanen, M.

AU - Pauss, F.

PY - 2012/2/10

Y1 - 2012/2/10

N2 - We present very high energy (E > 100GeV) γ-ray observations of the γ-ray binary system LS I +61°303 obtained with the MAGIC stereo system between 2009 October and 2010 January. We detect a 6.3σ γ-ray signal above 400GeV in the combined data set. The integral flux above an energy of 300GeV is F(E > 300 GeV) = (1.4 ± 0.3stat ± 0.4syst) × 10-12 cm-2 s-1, which corresponds to about 1.3% of the Crab Nebula flux in the same energy range. The orbit-averaged flux of LS I +61°303 in the orbital phase interval 0.6-0.7, where a maximum of the TeV flux is expected, is lower by almost an order of magnitude compared to our previous measurements between 2005 September and 2008 January. This provides evidence for a new low-flux state in LS I +61°303. We find that the change to the low-flux state cannot be solely explained by an increase of photon-photon absorption around the compact star. © 2012. The American Astronomical Society. All rights reserved.

AB - We present very high energy (E > 100GeV) γ-ray observations of the γ-ray binary system LS I +61°303 obtained with the MAGIC stereo system between 2009 October and 2010 January. We detect a 6.3σ γ-ray signal above 400GeV in the combined data set. The integral flux above an energy of 300GeV is F(E > 300 GeV) = (1.4 ± 0.3stat ± 0.4syst) × 10-12 cm-2 s-1, which corresponds to about 1.3% of the Crab Nebula flux in the same energy range. The orbit-averaged flux of LS I +61°303 in the orbital phase interval 0.6-0.7, where a maximum of the TeV flux is expected, is lower by almost an order of magnitude compared to our previous measurements between 2005 September and 2008 January. This provides evidence for a new low-flux state in LS I +61°303. We find that the change to the low-flux state cannot be solely explained by an increase of photon-photon absorption around the compact star. © 2012. The American Astronomical Society. All rights reserved.

KW - binaries: general

KW - gamma rays: general

KW - X-rays: binaries

UR - https://www.scopus.com/pages/publications/84856304560

U2 - 10.1088/0004-637X/746/1/80

DO - 10.1088/0004-637X/746/1/80

M3 - Article

SN - 0004-637X

VL - 746

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 80

ER -

Detection of the γ-ray binary LSI +61°303 in a low-flux state at very high energy γ-rays with the magic telescopes in 2009

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