Discovery of very high energy gamma rays from 1ES 1218+30.4

J. Albert; E. Aliu; H. Anderhub; P. Antoranz; A. Armada; M. Asensio; C. Baixeras; J. A. Barrio; M. Bartelt; H. Bartko; D. Bastieri; S. R. Bavikadi; W. Bednarek; K. Berger; C. Bigongiari; A. Biland; E. Bisesi; R. K. Bock; T. Bretz; I. Britvitch; M. Camara; A. Chilingarian; S. Ciprini; J. A. Coarasa; S. Commichau; J. L. Contreras; J. Cortina; V. Curtef; V. Danielyan; F. Dazzi; A. De Angelis; 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; N. Galante; M. Garczarczyk; M. Gaug; M. Giller; F. Goebel; D. Hakobyan; M. Hayashida; T. Hengstebeck; D. Hóhne; J. Hose; P. Jacon; O. Kalekin; D. Kranich; A. Laille; T. Lenisa; P. Liebing; E. Lindfors; F. Longo; J. López; M. Loṕez; E. Lorenz; F. Lucarelli; P. Majumdar; G. Maneva; K. Mannheim; M. Mariotti; M. Martínez; K. Mase; D. Mazin; M. Meucci; M. Meyer; J. M. Miranda; R. Mirzoyan; S. Mizobuchi; A. Moralejo; K. Nilsson; E. Oña-Wilhelmi; R. Orduña; N. Otte; I. Oya; D. Paneque; R. Paoletti; M. Pasanen; D. Pascoli; F. Pauss; N. Pavel; R. Pegna; M. Persic; L. Peruzzo; A. Piccioli; M. Poller; E. Prandini; W. Rhode; J. Rico; B. Riegel

doi:10.1086/504845

Discovery of very high energy gamma rays from 1ES 1218+30.4

J. Albert, E. Aliu, H. Anderhub, P. Antoranz, A. Armada, M. Asensio, C. Baixeras, J. A. Barrio, M. Bartelt, H. Bartko, D. Bastieri, S. R. Bavikadi, W. Bednarek, K. Berger, C. Bigongiari, A. Biland, E. Bisesi, R. K. Bock, T. Bretz, I. BritvitchM. Camara, A. Chilingarian, S. Ciprini, J. A. Coarasa, S. Commichau, J. L. Contreras, J. Cortina, V. Curtef, V. Danielyan, F. Dazzi, A. De Angelis, 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, N. Galante, M. Garczarczyk, M. Gaug, M. Giller, F. Goebel, D. Hakobyan, M. Hayashida, T. Hengstebeck, D. Hóhne, J. Hose, P. Jacon, O. Kalekin, D. Kranich, A. Laille, T. Lenisa, P. Liebing, E. Lindfors, F. Longo, J. López, M. Loṕez, E. Lorenz, F. Lucarelli, P. Majumdar, G. Maneva, K. Mannheim, M. Mariotti, M. Martínez, K. Mase, D. Mazin, M. Meucci, M. Meyer, J. M. Miranda, R. Mirzoyan, S. Mizobuchi, A. Moralejo, K. Nilsson, E. Oña-Wilhelmi, R. Orduña, N. Otte, I. Oya, D. Paneque, R. Paoletti, M. Pasanen, D. Pascoli, F. Pauss, N. Pavel, R. Pegna, M. Persic, L. Peruzzo, A. Piccioli, M. Poller, E. Prandini, W. Rhode, J. Rico, B. Riegel

Department of Physics

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119 Scopus citations

Abstract

The MAGIC collaboration has studied the high-frequency-peaked BL Lac object 1ES 1218+30.4, at a redshift z = 0.182, using the MAGIC imaging air Cerenkov telescope located on the Canary Island of La Palma. A gamma-ray signal was observed with 6.4 a significance. The differential energy spectrum for an energy threshold of 120 GeV can be fitted by a simple power law, yielding F _E(E) = (8.1 ± 2.1) × 10^-7[E/(250 GeV) ^-3.0±0.4 TeV^-1 m^-2 s^-1. During the 6 days of observation in 2005 January, no time variability on timescales of days was found within the statistical errors. The observed integral flux above 350 GeV is nearly a factor of 2 below the upper limit reported by the Whipple collaboration in 2003.

Original language	English
Pages (from-to)	L119-L122
Journal	Astrophysical Journal
Volume	642
Issue number	2 II
DOIs	https://doi.org/10.1086/504845
State	Published - May 10 2006

Keywords

Gamma rays: observations

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10.1086/504845

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Albert, J., Aliu, E., Anderhub, H., Antoranz, P., Armada, A., Asensio, M., Baixeras, C., Barrio, J. A., Bartelt, M., Bartko, H., Bastieri, D., Bavikadi, S. R., Bednarek, W., Berger, K., Bigongiari, C., Biland, A., Bisesi, E., Bock, R. K., Bretz, T., ... Riegel, B. (2006). Discovery of very high energy gamma rays from 1ES 1218+30.4. Astrophysical Journal, 642(2 II), L119-L122. https://doi.org/10.1086/504845

@article{6fe5c78e692c444c90f5c42294e6f2ba,

title = "Discovery of very high energy gamma rays from 1ES 1218+30.4",

abstract = "The MAGIC collaboration has studied the high-frequency-peaked BL Lac object 1ES 1218+30.4, at a redshift z = 0.182, using the MAGIC imaging air Cerenkov telescope located on the Canary Island of La Palma. A gamma-ray signal was observed with 6.4 a significance. The differential energy spectrum for an energy threshold of 120 GeV can be fitted by a simple power law, yielding F E(E) = (8.1 ± 2.1) × 10-7[E/(250 GeV) -3.0±0.4 TeV-1 m-2 s-1. During the 6 days of observation in 2005 January, no time variability on timescales of days was found within the statistical errors. The observed integral flux above 350 GeV is nearly a factor of 2 below the upper limit reported by the Whipple collaboration in 2003.",

keywords = "Gamma rays: observations",

author = "J. Albert and E. Aliu and H. Anderhub and P. Antoranz and A. Armada and M. Asensio and C. Baixeras and Barrio, {J. A.} and M. Bartelt and H. Bartko and D. Bastieri and Bavikadi, {S. R.} and W. Bednarek and K. Berger and C. Bigongiari and A. Biland and E. Bisesi and Bock, {R. K.} and T. Bretz and I. Britvitch and M. Camara and A. Chilingarian and S. Ciprini and Coarasa, {J. A.} and S. Commichau and Contreras, {J. L.} and J. Cortina and V. Curtef and V. Danielyan and F. Dazzi and {De Angelis}, A. 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 N. Galante and M. Garczarczyk and M. Gaug and M. Giller and F. Goebel and D. Hakobyan and M. Hayashida and T. Hengstebeck and D. H{\'o}hne and J. Hose and P. Jacon and O. Kalekin and D. Kranich and A. Laille and T. Lenisa and P. Liebing and E. Lindfors and F. Longo and J. L{\'o}pez and M. Loṕez and E. Lorenz and F. Lucarelli and P. Majumdar and G. Maneva and K. Mannheim and M. Mariotti and M. Mart{\'i}nez and K. Mase and D. Mazin and M. Meucci and M. Meyer and Miranda, {J. M.} and R. Mirzoyan and S. Mizobuchi and A. Moralejo and K. Nilsson and E. O{\~n}a-Wilhelmi and R. Ordu{\~n}a and N. Otte and I. Oya and D. Paneque and R. Paoletti and M. Pasanen and D. Pascoli and F. Pauss and N. Pavel and R. Pegna and M. Persic and L. Peruzzo and A. Piccioli and M. Poller and E. Prandini and W. Rhode and J. Rico and B. Riegel",

year = "2006",

month = may,

day = "10",

doi = "10.1086/504845",

language = "English",

volume = "642",

pages = "L119--L122",

journal = "Astrophysical Journal",

issn = "0004-637X",

number = "2 II",

}

Albert, J, Aliu, E, Anderhub, H, Antoranz, P, Armada, A, Asensio, M, Baixeras, C, Barrio, JA, Bartelt, M, Bartko, H, Bastieri, D, Bavikadi, SR, Bednarek, W, Berger, K, Bigongiari, C, Biland, A, Bisesi, E, Bock, RK, Bretz, T, Britvitch, I, Camara, M, Chilingarian, A, Ciprini, S, Coarasa, JA, Commichau, S, Contreras, JL, Cortina, J, Curtef, V, Danielyan, V, Dazzi, F, De Angelis, A, 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, Galante, N, Garczarczyk, M, Gaug, M, Giller, M, Goebel, F, Hakobyan, D, Hayashida, M, Hengstebeck, T, Hóhne, D, Hose, J, Jacon, P, Kalekin, O, Kranich, D, Laille, A, Lenisa, T, Liebing, P, Lindfors, E, Longo, F, López, J, Loṕez, M, Lorenz, E, Lucarelli, F, Majumdar, P, Maneva, G, Mannheim, K, Mariotti, M, Martínez, M, Mase, K, Mazin, D, Meucci, M, Meyer, M, Miranda, JM, Mirzoyan, R, Mizobuchi, S, Moralejo, A, Nilsson, K, Oña-Wilhelmi, E, Orduña, R, Otte, N, Oya, I, Paneque, D, Paoletti, R, Pasanen, M, Pascoli, D, Pauss, F, Pavel, N, Pegna, R, Persic, M, Peruzzo, L, Piccioli, A, Poller, M, Prandini, E, Rhode, W, Rico, J & Riegel, B 2006, 'Discovery of very high energy gamma rays from 1ES 1218+30.4', Astrophysical Journal, vol. 642, no. 2 II, pp. L119-L122. https://doi.org/10.1086/504845

TY - JOUR

T1 - Discovery of very high energy gamma rays from 1ES 1218+30.4

AU - Albert, J.

AU - Aliu, E.

AU - Anderhub, H.

AU - Antoranz, P.

AU - Armada, A.

AU - Asensio, M.

AU - Baixeras, C.

AU - Barrio, J. A.

AU - Bartelt, M.

AU - Bartko, H.

AU - Bastieri, D.

AU - Bavikadi, S. R.

AU - Bednarek, W.

AU - Berger, K.

AU - Bigongiari, C.

AU - Biland, A.

AU - Bisesi, E.

AU - Bock, R. K.

AU - Bretz, T.

AU - Britvitch, I.

AU - Camara, M.

AU - Chilingarian, A.

AU - Ciprini, S.

AU - Coarasa, J. A.

AU - Commichau, S.

AU - Contreras, J. L.

AU - Cortina, J.

AU - Curtef, V.

AU - Danielyan, V.

AU - Dazzi, F.

AU - De Angelis, A.

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 - Galante, N.

AU - Garczarczyk, M.

AU - Gaug, M.

AU - Giller, M.

AU - Goebel, F.

AU - Hakobyan, D.

AU - Hayashida, M.

AU - Hengstebeck, T.

AU - Hóhne, D.

AU - Hose, J.

AU - Jacon, P.

AU - Kalekin, O.

AU - Kranich, D.

AU - Laille, A.

AU - Lenisa, T.

AU - Liebing, P.

AU - Lindfors, E.

AU - Longo, F.

AU - López, J.

AU - Loṕez, M.

AU - Lorenz, E.

AU - Lucarelli, F.

AU - Majumdar, P.

AU - Maneva, G.

AU - Mannheim, K.

AU - Mariotti, M.

AU - Martínez, M.

AU - Mase, K.

AU - Mazin, D.

AU - Meucci, M.

AU - Meyer, M.

AU - Miranda, J. M.

AU - Mirzoyan, R.

AU - Mizobuchi, S.

AU - Moralejo, A.

AU - Nilsson, K.

AU - Oña-Wilhelmi, E.

AU - Orduña, R.

AU - Otte, N.

AU - Oya, I.

AU - Paneque, D.

AU - Paoletti, R.

AU - Pasanen, M.

AU - Pascoli, D.

AU - Pauss, F.

AU - Pavel, N.

AU - Pegna, R.

AU - Persic, M.

AU - Peruzzo, L.

AU - Piccioli, A.

AU - Poller, M.

AU - Prandini, E.

AU - Rhode, W.

AU - Rico, J.

AU - Riegel, B.

PY - 2006/5/10

Y1 - 2006/5/10

N2 - The MAGIC collaboration has studied the high-frequency-peaked BL Lac object 1ES 1218+30.4, at a redshift z = 0.182, using the MAGIC imaging air Cerenkov telescope located on the Canary Island of La Palma. A gamma-ray signal was observed with 6.4 a significance. The differential energy spectrum for an energy threshold of 120 GeV can be fitted by a simple power law, yielding F E(E) = (8.1 ± 2.1) × 10-7[E/(250 GeV) -3.0±0.4 TeV-1 m-2 s-1. During the 6 days of observation in 2005 January, no time variability on timescales of days was found within the statistical errors. The observed integral flux above 350 GeV is nearly a factor of 2 below the upper limit reported by the Whipple collaboration in 2003.

AB - The MAGIC collaboration has studied the high-frequency-peaked BL Lac object 1ES 1218+30.4, at a redshift z = 0.182, using the MAGIC imaging air Cerenkov telescope located on the Canary Island of La Palma. A gamma-ray signal was observed with 6.4 a significance. The differential energy spectrum for an energy threshold of 120 GeV can be fitted by a simple power law, yielding F E(E) = (8.1 ± 2.1) × 10-7[E/(250 GeV) -3.0±0.4 TeV-1 m-2 s-1. During the 6 days of observation in 2005 January, no time variability on timescales of days was found within the statistical errors. The observed integral flux above 350 GeV is nearly a factor of 2 below the upper limit reported by the Whipple collaboration in 2003.

KW - Gamma rays: observations

UR - http://www.scopus.com/inward/record.url?scp=33746055713&partnerID=8YFLogxK

U2 - 10.1086/504845

DO - 10.1086/504845

M3 - Article

AN - SCOPUS:33746055713

SN - 0004-637X

VL - 642

SP - L119-L122

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 II

ER -

Discovery of very high energy gamma rays from 1ES 1218+30.4

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Keywords

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