Detection of VHE γ-rays from HESS J0632+057 during the 2011 february X-ray outburst with the magic telescopes

J. Aleksić; E. A. Alvarez; L. A. Antonelli; P. Antoranz; M. Asensio; M. Backes; U. Barres De Almeida; J. A. Barrio; D. Bastieri; J. Becerra González; W. Bednarek; K. Berger; E. Bernardini; A. Biland; O. Blanch; R. K. Bock; A. Boller; G. Bonnoli; D. Borla Tridon; V. Bosch-Ramon; T. Bretz; A. Cañellas; E. Carmona; A. Carosi; P. Colin; E. Colombo; J. L. Contreras; J. Cortina; L. Cossio; S. Covino; P. Da Vela; 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. Eisenacher; D. Elsaesser; D. Ferenc; M. V. Fonseca; L. Font; C. Fruck; R. J. García López; M. Garczarczyk; D. Garrido Terrats; G. Giavitto; N. Godinović; A. González Muñoz; S. R. Gozzini; D. Hadasch; D. Häfner; A. Herrero; D. Hildebrand; J. Hose; D. Hrupec; B. Huber; F. Jankowski; T. Jogler; V. Kadenius; H. Kellermann; S. Klepser; T. Krähenbühl; J. Krause; A. La Barbera; D. Lelas; E. Leonardo; N. Lewandowska; E. Lindfors; S. Lombardi; M. López; R. López-Coto; A. López-Oramas; 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; J. Moldón; A. Moralejo; P. Munar-Adrover; A. Niedzwiecki; D. Nieto; K. Nilsson; N. Nowak; R. Orito; S. Paiano

doi:10.1088/2041-8205/754/1/L10

Detection of VHE γ-rays from HESS J0632+057 during the 2011 february X-ray outburst with the magic telescopes

J. Aleksić, E. A. Alvarez, L. A. Antonelli, P. Antoranz, M. Asensio, M. Backes, U. Barres De Almeida, J. A. Barrio, D. Bastieri, J. Becerra González, W. Bednarek, K. Berger, E. Bernardini, A. Biland, O. Blanch, R. K. Bock, A. Boller, G. Bonnoli, D. Borla Tridon, V. Bosch-RamonT. Bretz, A. Cañellas, E. Carmona, A. Carosi, P. Colin, E. Colombo, J. L. Contreras, J. Cortina, L. Cossio, S. Covino, P. Da Vela, 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. Eisenacher, D. Elsaesser, D. Ferenc, M. V. Fonseca, L. Font, C. Fruck, R. J. García López, M. Garczarczyk, D. Garrido Terrats, G. Giavitto, N. Godinović, A. González Muñoz, S. R. Gozzini, D. Hadasch, D. Häfner, A. Herrero, D. Hildebrand, J. Hose, D. Hrupec, B. Huber, F. Jankowski, T. Jogler, V. Kadenius, H. Kellermann, S. Klepser, T. Krähenbühl, J. Krause, A. La Barbera, D. Lelas, E. Leonardo, N. Lewandowska, E. Lindfors, S. Lombardi, M. López, R. López-Coto, A. López-Oramas, 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, J. Moldón, A. Moralejo, P. Munar-Adrover, A. Niedzwiecki, D. Nieto, K. Nilsson, N. Nowak, R. Orito, S. Paiano

Institut de Física d'Altes Energies

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35 Citations (Scopus)

Abstract

The very high energy (VHE) γ-ray source HESS J0632+057 has recently been confirmed to be a γ-ray binary. The optical counterpart is the Be star MWC 148, and a compact object of unknown nature orbits it every 321days with a high eccentricity of 0.8. We monitored HESS J0632+057 with the stereoscopic MAGIC telescopes from 2010 October to 2011 March and detected significant VHE γ-ray emission during 2011 February, when the system exhibited an X-ray outburst. We find no γ-ray signal in the other observation periods when the system did not show increased X-ray flux. Thus, HESS J0632+057 exhibits γ-ray variability on timescales of the order of one to two months possibly linked to the X-ray outburst that takes place about 100days after the periastron passage. Furthermore, our measurements provide for the first time the γ-ray spectrum down to about 140GeV and indicate no turnover of the spectrum at low energies. We compare the properties of HESS J0632+057 with the similar γ-ray binary LS I +61°303 and discuss the possible origin of the multi-wavelength emission of the source. © 2012. The American Astronomical Society. All rights reserved.

Original language	English
Article number	L10
Journal	Astrophysical Journal Letters
Volume	754
Issue number	1
DOIs	https://doi.org/10.1088/2041-8205/754/1/L10
Publication status	Published - 20 Jul 2012

Keywords

binaries: general
gamma rays: general
stars: individual (MWC 148)
X-rays: binaries
X-rays: individual (HESS J0632+057)

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10.1088/2041-8205/754/1/L10

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Aleksić, J., Alvarez, E. A., Antonelli, L. A., Antoranz, P., Asensio, M., Backes, M., Barres De Almeida, U., Barrio, J. A., Bastieri, D., Becerra González, J., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Borla Tridon, D., ... Paiano, S. (2012). Detection of VHE γ-rays from HESS J0632+057 during the 2011 february X-ray outburst with the magic telescopes. Astrophysical Journal Letters, 754(1), [L10]. https://doi.org/10.1088/2041-8205/754/1/L10

@article{0bfb78b0f1ce4c14b776a41eaf24b685,

title = "Detection of VHE γ-rays from HESS J0632+057 during the 2011 february X-ray outburst with the magic telescopes",

abstract = "The very high energy (VHE) γ-ray source HESS J0632+057 has recently been confirmed to be a γ-ray binary. The optical counterpart is the Be star MWC 148, and a compact object of unknown nature orbits it every 321days with a high eccentricity of 0.8. We monitored HESS J0632+057 with the stereoscopic MAGIC telescopes from 2010 October to 2011 March and detected significant VHE γ-ray emission during 2011 February, when the system exhibited an X-ray outburst. We find no γ-ray signal in the other observation periods when the system did not show increased X-ray flux. Thus, HESS J0632+057 exhibits γ-ray variability on timescales of the order of one to two months possibly linked to the X-ray outburst that takes place about 100days after the periastron passage. Furthermore, our measurements provide for the first time the γ-ray spectrum down to about 140GeV and indicate no turnover of the spectrum at low energies. We compare the properties of HESS J0632+057 with the similar γ-ray binary LS I +61°303 and discuss the possible origin of the multi-wavelength emission of the source. {\textcopyright} 2012. The American Astronomical Society. All rights reserved.",

keywords = "binaries: general, gamma rays: general, stars: individual (MWC 148), X-rays: binaries, X-rays: individual (HESS J0632+057)",

author = "J. Aleksi{\'c} and Alvarez, {E. A.} and Antonelli, {L. A.} and P. Antoranz and M. Asensio and M. Backes and {Barres De Almeida}, U. and Barrio, {J. A.} and D. Bastieri and {Becerra Gonz{\'a}lez}, J. and W. Bednarek 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 T. Bretz and A. Ca{\~n}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 {Da Vela}, P. 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. Eisenacher 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 Terrats, {D. Garrido} and G. Giavitto and N. Godinovi{\'c} and {Gonz{\'a}lez Mu{\~n}oz}, A. and Gozzini, {S. R.} and D. Hadasch and D. H{\"a}fner and A. Herrero and D. Hildebrand and J. Hose and D. Hrupec and B. Huber and F. Jankowski and T. Jogler and V. Kadenius 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 N. Lewandowska and E. Lindfors and S. Lombardi and M. L{\'o}pez and R. L{\'o}pez-Coto and A. L{\'o}pez-Oramas 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 J. Mold{\'o}n and A. Moralejo and P. Munar-Adrover and A. Niedzwiecki and D. Nieto and K. Nilsson and N. Nowak and R. Orito and S. Paiano",

year = "2012",

month = jul,

day = "20",

doi = "10.1088/2041-8205/754/1/L10",

language = "English",

volume = "754",

journal = "The astrophysical journal. Letters (Print)",

issn = "2041-8205",

number = "1",

}

Aleksić, J, Alvarez, EA, Antonelli, LA, Antoranz, P, Asensio, M, Backes, M, Barres De Almeida, U, Barrio, JA, Bastieri, D, Becerra González, J, Bednarek, W, Berger, K, Bernardini, E, Biland, A, Blanch, O, Bock, RK, Boller, A, Bonnoli, G, Borla Tridon, D, Bosch-Ramon, V, Bretz, T, Cañellas, A, Carmona, E, Carosi, A, Colin, P, Colombo, E, Contreras, JL, Cortina, J, Cossio, L, Covino, S, Da Vela, P, 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, Eisenacher, D, Elsaesser, D, Ferenc, D, Fonseca, MV, Font, L, Fruck, C, García López, RJ, Garczarczyk, M, Terrats, DG, Giavitto, G, Godinović, N, González Muñoz, A, Gozzini, SR, Hadasch, D, Häfner, D, Herrero, A, Hildebrand, D, Hose, J, Hrupec, D, Huber, B, Jankowski, F, Jogler, T, Kadenius, V, Kellermann, H, Klepser, S, Krähenbühl, T, Krause, J, La Barbera, A, Lelas, D, Leonardo, E, Lewandowska, N, Lindfors, E, Lombardi, S, López, M, López-Coto, R, López-Oramas, A, Lorenz, E, Makariev, M, Maneva, G, Mankuzhiyil, N, Mannheim, K, Maraschi, L, Mariotti, M, Martínez, M, Mazin, D, Meucci, M, Miranda, JM, Mirzoyan, R, Moldón, J, Moralejo, A, Munar-Adrover, P, Niedzwiecki, A, Nieto, D, Nilsson, K, Nowak, N, Orito, R & Paiano, S 2012, 'Detection of VHE γ-rays from HESS J0632+057 during the 2011 february X-ray outburst with the magic telescopes', Astrophysical Journal Letters, vol. 754, no. 1, L10. https://doi.org/10.1088/2041-8205/754/1/L10

TY - JOUR

T1 - Detection of VHE γ-rays from HESS J0632+057 during the 2011 february X-ray outburst with the magic telescopes

AU - Aleksić, J.

AU - Alvarez, E. A.

AU - Antonelli, L. A.

AU - Antoranz, P.

AU - Asensio, M.

AU - Backes, M.

AU - Barres De Almeida, U.

AU - Barrio, J. A.

AU - Bastieri, D.

AU - Becerra González, J.

AU - Bednarek, W.

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 - Bretz, T.

AU - Cañellas, 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 - Da Vela, P.

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 - Eisenacher, D.

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 - Terrats, D. Garrido

AU - Giavitto, G.

AU - Godinović, N.

AU - González Muñoz, A.

AU - Gozzini, S. R.

AU - Hadasch, D.

AU - Häfner, D.

AU - Herrero, A.

AU - Hildebrand, D.

AU - Hose, J.

AU - Hrupec, D.

AU - Huber, B.

AU - Jankowski, F.

AU - Jogler, T.

AU - Kadenius, V.

AU - Kellermann, H.

AU - Klepser, S.

AU - Krähenbühl, T.

AU - Krause, J.

AU - La Barbera, A.

AU - Lelas, D.

AU - Leonardo, E.

AU - Lewandowska, N.

AU - Lindfors, E.

AU - Lombardi, S.

AU - López, M.

AU - López-Coto, R.

AU - López-Oramas, A.

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 - Moldón, J.

AU - Moralejo, A.

AU - Munar-Adrover, P.

AU - Niedzwiecki, A.

AU - Nieto, D.

AU - Nilsson, K.

AU - Nowak, N.

AU - Orito, R.

AU - Paiano, S.

PY - 2012/7/20

Y1 - 2012/7/20

N2 - The very high energy (VHE) γ-ray source HESS J0632+057 has recently been confirmed to be a γ-ray binary. The optical counterpart is the Be star MWC 148, and a compact object of unknown nature orbits it every 321days with a high eccentricity of 0.8. We monitored HESS J0632+057 with the stereoscopic MAGIC telescopes from 2010 October to 2011 March and detected significant VHE γ-ray emission during 2011 February, when the system exhibited an X-ray outburst. We find no γ-ray signal in the other observation periods when the system did not show increased X-ray flux. Thus, HESS J0632+057 exhibits γ-ray variability on timescales of the order of one to two months possibly linked to the X-ray outburst that takes place about 100days after the periastron passage. Furthermore, our measurements provide for the first time the γ-ray spectrum down to about 140GeV and indicate no turnover of the spectrum at low energies. We compare the properties of HESS J0632+057 with the similar γ-ray binary LS I +61°303 and discuss the possible origin of the multi-wavelength emission of the source. © 2012. The American Astronomical Society. All rights reserved.

AB - The very high energy (VHE) γ-ray source HESS J0632+057 has recently been confirmed to be a γ-ray binary. The optical counterpart is the Be star MWC 148, and a compact object of unknown nature orbits it every 321days with a high eccentricity of 0.8. We monitored HESS J0632+057 with the stereoscopic MAGIC telescopes from 2010 October to 2011 March and detected significant VHE γ-ray emission during 2011 February, when the system exhibited an X-ray outburst. We find no γ-ray signal in the other observation periods when the system did not show increased X-ray flux. Thus, HESS J0632+057 exhibits γ-ray variability on timescales of the order of one to two months possibly linked to the X-ray outburst that takes place about 100days after the periastron passage. Furthermore, our measurements provide for the first time the γ-ray spectrum down to about 140GeV and indicate no turnover of the spectrum at low energies. We compare the properties of HESS J0632+057 with the similar γ-ray binary LS I +61°303 and discuss the possible origin of the multi-wavelength emission of the source. © 2012. The American Astronomical Society. All rights reserved.

KW - binaries: general

KW - gamma rays: general

KW - stars: individual (MWC 148)

KW - X-rays: binaries

KW - X-rays: individual (HESS J0632+057)

U2 - 10.1088/2041-8205/754/1/L10

DO - 10.1088/2041-8205/754/1/L10

M3 - Article

VL - 754

JO - The astrophysical journal. Letters (Print)

JF - The astrophysical journal. Letters (Print)

SN - 2041-8205

IS - 1

M1 - L10

ER -

Detection of VHE γ-rays from HESS J0632+057 during the 2011 february X-ray outburst with the magic telescopes

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Keywords

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