The simultaneous low state spectral energy distribution of 1ES 2344+514 from radio to very high energies

J. Aleksić; L. A. Antonelli; P. Antoranz; M. Asensio; M. Backes; U. Barres De Almeida; J. A. Barrio; W. Bednarek; K. Berger; E. Bernardini; A. Biland; O. Blanch; R. K. Bock; A. Boller; S. Bonnefoy; G. Bonnoli; D. Borla Tridon; T. Bretz; E. Carmona; A. Carosi; D. Carreto Fidalgo; P. Colin; E. Colombo; J. L. Contreras; J. Cortina; L. Cossio; S. Covino; P. Da Vela; F. Dazzi; A. De Angelis; G. De Caneva; B. De Lotto; C. Delgado Mendez; 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; M. Gaug; G. Giavitto; N. Godinović; A. González Muñoz; S. R. Gozzini; A. Hadamek; D. Hadasch; A. Herrero; J. Hose; D. Hrupec; F. Jankowski; V. Kadenius; S. Klepser; M. L. Knoetig; T. Krähenbühl; J. Krause; J. Kushida; A. La Barbera; D. Lelas; E. Leonardo; N. Lewandowska; E. Lindfors; S. Lombardi; M. López; R. López-Coto; A. López-Oramas; E. Lorenz; I. Lozano; M. Makariev; K. Mallot; G. Maneva; N. Mankuzhiyil; K. Mannheim; L. Maraschi; B. Marcote; M. Mariotti; M. Martínez; J. Masbou; D. Mazin; M. Meucci; J. M. Miranda; R. Mirzoyan; J. Moldón; A. Moralejo; P. Munar-Adrover; D. Nakajima; A. Niedzwiecki; D. Nieto; K. Nilsson; N. Nowak; R. Orito; S. Paiano; M. Palatiello

doi:10.1051/0004-6361/201220714

The simultaneous low state spectral energy distribution of 1ES 2344+514 from radio to very high energies

J. Aleksić, L. A. Antonelli, P. Antoranz, M. Asensio, M. Backes, U. Barres De Almeida, J. A. Barrio, W. Bednarek, K. Berger, E. Bernardini, A. Biland, O. Blanch, R. K. Bock, A. Boller, S. Bonnefoy, G. Bonnoli, D. Borla Tridon, T. Bretz, E. Carmona, A. CarosiD. Carreto Fidalgo, P. Colin, E. Colombo, J. L. Contreras, J. Cortina, L. Cossio, S. Covino, P. Da Vela, F. Dazzi, A. De Angelis, G. De Caneva, B. De Lotto, C. Delgado Mendez, 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, M. Gaug, G. Giavitto, N. Godinović, A. González Muñoz, S. R. Gozzini, A. Hadamek, D. Hadasch, A. Herrero, J. Hose, D. Hrupec, F. Jankowski, V. Kadenius, S. Klepser, M. L. Knoetig, T. Krähenbühl, J. Krause, J. Kushida, A. La Barbera, D. Lelas, E. Leonardo, N. Lewandowska, E. Lindfors, S. Lombardi, M. López, R. López-Coto, A. López-Oramas, E. Lorenz, I. Lozano, M. Makariev, K. Mallot, G. Maneva, N. Mankuzhiyil, K. Mannheim, L. Maraschi, B. Marcote, M. Mariotti, M. Martínez, J. Masbou, D. Mazin, M. Meucci, J. M. Miranda, R. Mirzoyan, J. Moldón, A. Moralejo, P. Munar-Adrover, D. Nakajima, A. Niedzwiecki, D. Nieto, K. Nilsson, N. Nowak, R. Orito, S. Paiano, M. Palatiello

Research output: Contribution to journal › Article › Research › peer-review

16 Citations (Scopus)

Abstract

Context. BL Lacertae objects are variable at all energy bands on time scales down to minutes. To construct and interpret their spectral energy distribution (SED), simultaneous broad-band observations are mandatory. Up to now, the number of objects studied during such campaigns is very limited and biased towards high flux states. Aims.We present the results of a dedicated multi-wavelength study of the high-frequency peaked BL Lacertae (HBL) object and known TeV emitter 1ES 2344+514 by means of a pre-organised campaign. Methods.The observations were conducted during simultaneous visibility windows of MAGIC and AGILE in late 2008. The measurements were complemented by Metsähovi, RATAN-600, KVA+Tuorla, Swift and VLBA pointings. Additional coverage was provided by the ongoing long-term F-GAMMA and MOJAVE programs, the OVRO 40-m and CrAO telescopes as well as the Fermi satellite. The obtained SEDs are modelled using a one-zone as well as a self-consistent two-zone synchrotron self-Compton model. Results. 1ES 2344+514 was found at very low flux states in both X-rays and very high energy gamma rays. Variability was detected in the low frequency radio and X-ray bands only, where for the latter a small flare was observed. The X-ray flare was possibly caused by shock acceleration characterised by similar cooling and acceleration time scales. MOJAVE VLBA monitoring reveals a static jet whose components are stable over time scales of eleven years, contrary to previous findings. There appears to be no significant correlation between the 15 GHz and R-band monitoring light curves. The observations presented here constitute the first multi-wavelength campaign on 1ES 2344+514 from radio to VHE energies and one of the few simultaneous SEDs during low activity states. The quasi-simultaneous Fermi-LAT data poses some challenges for SED modelling, but in general the SEDs are described well by both applied models. The resulting parameters are typical for TeV emitting HBLs. Consequently it remains unclear whether a so-called quiescent state was found in this campaign. © 2013 ESO.

Original language	English
Article number	A67
Journal	Astronomy and Astrophysics
Volume	556
DOIs	https://doi.org/10.1051/0004-6361/201220714
Publication status	Published - 9 Aug 2013

Keywords

BL Lacertae objects: individual: 1ES 2344+514
Galaxies: active
Gamma rays: galaxies
Radiation mechanisms: non-thermal
X-rays: individuals: 1ES 2344+514

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10.1051/0004-6361/201220714

Cite this

Aleksić, J., Antonelli, L. A., Antoranz, P., Asensio, M., Backes, M., Barres De Almeida, U., Barrio, J. A., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnefoy, S., Bonnoli, G., Borla Tridon, D., Bretz, T., Carmona, E., ... Palatiello, M. (2013). The simultaneous low state spectral energy distribution of 1ES 2344+514 from radio to very high energies. Astronomy and Astrophysics, 556, [A67]. https://doi.org/10.1051/0004-6361/201220714

Aleksić, J. ; Antonelli, L. A. ; Antoranz, P. ; Asensio, M. ; Backes, M. ; Barres De Almeida, U. ; Barrio, J. A. ; Bednarek, W. ; Berger, K. ; Bernardini, E. ; Biland, A. ; Blanch, O. ; Bock, R. K. ; Boller, A. ; Bonnefoy, S. ; Bonnoli, G. ; Borla Tridon, D. ; Bretz, T. ; Carmona, E. ; Carosi, A. ; Carreto Fidalgo, D. ; Colin, P. ; Colombo, E. ; Contreras, J. L. ; Cortina, J. ; Cossio, L. ; Covino, S. ; Da Vela, P. ; Dazzi, F. ; De Angelis, A. ; De Caneva, G. ; De Lotto, B. ; Delgado Mendez, C. ; Doert, M. ; Domínguez, A. ; Dominis Prester, D. ; Dorner, D. ; Doro, M. ; Eisenacher, D. ; Elsaesser, D. ; Ferenc, D. ; Fonseca, M. V. ; Font, L. ; Fruck, C. ; García López, R. J. ; Garczarczyk, M. ; Garrido Terrats, D. ; Gaug, M. ; Giavitto, G. ; Godinović, N. ; González Muñoz, A. ; Gozzini, S. R. ; Hadamek, A. ; Hadasch, D. ; Herrero, A. ; Hose, J. ; Hrupec, D. ; Jankowski, F. ; Kadenius, V. ; Klepser, S. ; Knoetig, M. L. ; Krähenbühl, T. ; Krause, J. ; Kushida, J. ; La Barbera, A. ; Lelas, D. ; Leonardo, E. ; Lewandowska, N. ; Lindfors, E. ; Lombardi, S. ; López, M. ; López-Coto, R. ; López-Oramas, A. ; Lorenz, E. ; Lozano, I. ; Makariev, M. ; Mallot, K. ; Maneva, G. ; Mankuzhiyil, N. ; Mannheim, K. ; Maraschi, L. ; Marcote, B. ; Mariotti, M. ; Martínez, M. ; Masbou, J. ; Mazin, D. ; Meucci, M. ; Miranda, J. M. ; Mirzoyan, R. ; Moldón, J. ; Moralejo, A. ; Munar-Adrover, P. ; Nakajima, D. ; Niedzwiecki, A. ; Nieto, D. ; Nilsson, K. ; Nowak, N. ; Orito, R. ; Paiano, S. ; Palatiello, M. / The simultaneous low state spectral energy distribution of 1ES 2344+514 from radio to very high energies. In: Astronomy and Astrophysics. 2013 ; Vol. 556.

@article{4de2ee7c3be24d8581928f018703896f,

title = "The simultaneous low state spectral energy distribution of 1ES 2344+514 from radio to very high energies",

abstract = "Context. BL Lacertae objects are variable at all energy bands on time scales down to minutes. To construct and interpret their spectral energy distribution (SED), simultaneous broad-band observations are mandatory. Up to now, the number of objects studied during such campaigns is very limited and biased towards high flux states. Aims.We present the results of a dedicated multi-wavelength study of the high-frequency peaked BL Lacertae (HBL) object and known TeV emitter 1ES 2344+514 by means of a pre-organised campaign. Methods.The observations were conducted during simultaneous visibility windows of MAGIC and AGILE in late 2008. The measurements were complemented by Mets{\"a}hovi, RATAN-600, KVA+Tuorla, Swift and VLBA pointings. Additional coverage was provided by the ongoing long-term F-GAMMA and MOJAVE programs, the OVRO 40-m and CrAO telescopes as well as the Fermi satellite. The obtained SEDs are modelled using a one-zone as well as a self-consistent two-zone synchrotron self-Compton model. Results. 1ES 2344+514 was found at very low flux states in both X-rays and very high energy gamma rays. Variability was detected in the low frequency radio and X-ray bands only, where for the latter a small flare was observed. The X-ray flare was possibly caused by shock acceleration characterised by similar cooling and acceleration time scales. MOJAVE VLBA monitoring reveals a static jet whose components are stable over time scales of eleven years, contrary to previous findings. There appears to be no significant correlation between the 15 GHz and R-band monitoring light curves. The observations presented here constitute the first multi-wavelength campaign on 1ES 2344+514 from radio to VHE energies and one of the few simultaneous SEDs during low activity states. The quasi-simultaneous Fermi-LAT data poses some challenges for SED modelling, but in general the SEDs are described well by both applied models. The resulting parameters are typical for TeV emitting HBLs. Consequently it remains unclear whether a so-called quiescent state was found in this campaign. {\textcopyright} 2013 ESO.",

keywords = "BL Lacertae objects: individual: 1ES 2344+514, Galaxies: active, Gamma rays: galaxies, Radiation mechanisms: non-thermal, X-rays: individuals: 1ES 2344+514",

author = "J. Aleksi{\'c} and Antonelli, {L. A.} and P. Antoranz and M. Asensio and M. Backes and {Barres De Almeida}, U. and Barrio, {J. A.} and W. Bednarek and K. Berger and E. Bernardini and A. Biland and O. Blanch and Bock, {R. K.} and A. Boller and S. Bonnefoy and G. Bonnoli and {Borla Tridon}, D. and T. Bretz and E. Carmona and A. Carosi and {Carreto Fidalgo}, D. 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 Lotto}, B. and {Delgado Mendez}, C. 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 {Garrido Terrats}, D. and M. Gaug and G. Giavitto and N. Godinovi{\'c} and {Gonz{\'a}lez Mu{\~n}oz}, A. and Gozzini, {S. R.} and A. Hadamek and D. Hadasch and A. Herrero and J. Hose and D. Hrupec and F. Jankowski and V. Kadenius and S. Klepser and Knoetig, {M. L.} and T. Kr{\"a}henb{\"u}hl and J. Krause and J. Kushida 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 I. Lozano and M. Makariev and K. Mallot and G. Maneva and N. Mankuzhiyil and K. Mannheim and L. Maraschi and B. Marcote and M. Mariotti and M. Mart{\'i}nez and J. Masbou 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 D. Nakajima and A. Niedzwiecki and D. Nieto and K. Nilsson and N. Nowak and R. Orito and S. Paiano and M. Palatiello",

year = "2013",

month = aug,

day = "9",

doi = "10.1051/0004-6361/201220714",

language = "English",

volume = "556",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

}

Aleksić, J, Antonelli, LA, Antoranz, P, Asensio, M, Backes, M, Barres De Almeida, U, Barrio, JA, Bednarek, W, Berger, K, Bernardini, E, Biland, A, Blanch, O, Bock, RK, Boller, A, Bonnefoy, S, Bonnoli, G, Borla Tridon, D, Bretz, T, Carmona, E, Carosi, A, Carreto Fidalgo, D, Colin, P, Colombo, E, Contreras, JL, Cortina, J, Cossio, L, Covino, S, Da Vela, P, Dazzi, F, De Angelis, A, De Caneva, G, De Lotto, B, Delgado Mendez, C, 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, Garrido Terrats, D, Gaug, M, Giavitto, G, Godinović, N, González Muñoz, A, Gozzini, SR, Hadamek, A, Hadasch, D, Herrero, A, Hose, J, Hrupec, D, Jankowski, F, Kadenius, V, Klepser, S, Knoetig, ML, Krähenbühl, T, Krause, J, Kushida, J, La Barbera, A, Lelas, D, Leonardo, E, Lewandowska, N, Lindfors, E, Lombardi, S, López, M, López-Coto, R, López-Oramas, A, Lorenz, E, Lozano, I, Makariev, M, Mallot, K, Maneva, G, Mankuzhiyil, N, Mannheim, K, Maraschi, L, Marcote, B, Mariotti, M, Martínez, M, Masbou, J, Mazin, D, Meucci, M, Miranda, JM, Mirzoyan, R, Moldón, J, Moralejo, A, Munar-Adrover, P, Nakajima, D, Niedzwiecki, A, Nieto, D, Nilsson, K, Nowak, N, Orito, R, Paiano, S & Palatiello, M 2013, 'The simultaneous low state spectral energy distribution of 1ES 2344+514 from radio to very high energies', Astronomy and Astrophysics, vol. 556, A67. https://doi.org/10.1051/0004-6361/201220714

The simultaneous low state spectral energy distribution of 1ES 2344+514 from radio to very high energies. / Aleksić, J.; Antonelli, L. A.; Antoranz, P.; Asensio, M.; Backes, M.; Barres De Almeida, U.; Barrio, J. A.; Bednarek, W.; Berger, K.; Bernardini, E.; Biland, A.; Blanch, O.; Bock, R. K.; Boller, A.; Bonnefoy, S.; Bonnoli, G.; Borla Tridon, D.; Bretz, T.; Carmona, E.; Carosi, A.; Carreto Fidalgo, D.; Colin, P.; Colombo, E.; Contreras, J. L.; Cortina, J.; Cossio, L.; Covino, S.; Da Vela, P.; Dazzi, F.; De Angelis, A.; De Caneva, G.; De Lotto, B.; Delgado Mendez, C.; Doert, M.; Domínguez, A.; Dominis Prester, D.; Dorner, D.; Doro, M.; Eisenacher, D.; Elsaesser, D.; Ferenc, D.; Fonseca, M. V.; Font, L.; Fruck, C.; García López, R. J.; Garczarczyk, M.; Garrido Terrats, D.; Gaug, M.; Giavitto, G.; Godinović, N.; González Muñoz, A.; Gozzini, S. R.; Hadamek, A.; Hadasch, D.; Herrero, A.; Hose, J.; Hrupec, D.; Jankowski, F.; Kadenius, V.; Klepser, S.; Knoetig, M. L.; Krähenbühl, T.; Krause, J.; Kushida, J.; La Barbera, A.; Lelas, D.; Leonardo, E.; Lewandowska, N.; Lindfors, E.; Lombardi, S.; López, M.; López-Coto, R.; López-Oramas, A.; Lorenz, E.; Lozano, I.; Makariev, M.; Mallot, K.; Maneva, G.; Mankuzhiyil, N.; Mannheim, K.; Maraschi, L.; Marcote, B.; Mariotti, M.; Martínez, M.; Masbou, J.; Mazin, D.; Meucci, M.; Miranda, J. M.; Mirzoyan, R.; Moldón, J.; Moralejo, A.; Munar-Adrover, P.; Nakajima, D.; Niedzwiecki, A.; Nieto, D.; Nilsson, K.; Nowak, N.; Orito, R.; Paiano, S.; Palatiello, M.

In: Astronomy and Astrophysics, Vol. 556, A67, 09.08.2013.

Research output: Contribution to journal › Article › Research › peer-review

TY - JOUR

T1 - The simultaneous low state spectral energy distribution of 1ES 2344+514 from radio to very high energies

AU - Aleksić, J.

AU - Antonelli, L. A.

AU - Antoranz, P.

AU - Asensio, M.

AU - Backes, M.

AU - Barres De Almeida, U.

AU - Barrio, J. A.

AU - Bednarek, W.

AU - Berger, K.

AU - Bernardini, E.

AU - Biland, A.

AU - Blanch, O.

AU - Bock, R. K.

AU - Boller, A.

AU - Bonnefoy, S.

AU - Bonnoli, G.

AU - Borla Tridon, D.

AU - Bretz, T.

AU - Carmona, E.

AU - Carosi, A.

AU - Carreto Fidalgo, D.

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 Lotto, B.

AU - Delgado Mendez, C.

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 - Garrido Terrats, D.

AU - Gaug, M.

AU - Giavitto, G.

AU - Godinović, N.

AU - González Muñoz, A.

AU - Gozzini, S. R.

AU - Hadamek, A.

AU - Hadasch, D.

AU - Herrero, A.

AU - Hose, J.

AU - Hrupec, D.

AU - Jankowski, F.

AU - Kadenius, V.

AU - Klepser, S.

AU - Knoetig, M. L.

AU - Krähenbühl, T.

AU - Krause, J.

AU - Kushida, 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 - Lozano, I.

AU - Makariev, M.

AU - Mallot, K.

AU - Maneva, G.

AU - Mankuzhiyil, N.

AU - Mannheim, K.

AU - Maraschi, L.

AU - Marcote, B.

AU - Mariotti, M.

AU - Martínez, M.

AU - Masbou, J.

AU - Mazin, D.

AU - Meucci, M.

AU - Miranda, J. M.

AU - Mirzoyan, R.

AU - Moldón, J.

AU - Moralejo, A.

AU - Munar-Adrover, P.

AU - Nakajima, D.

AU - Niedzwiecki, A.

AU - Nieto, D.

AU - Nilsson, K.

AU - Nowak, N.

AU - Orito, R.

AU - Paiano, S.

AU - Palatiello, M.

PY - 2013/8/9

Y1 - 2013/8/9

N2 - Context. BL Lacertae objects are variable at all energy bands on time scales down to minutes. To construct and interpret their spectral energy distribution (SED), simultaneous broad-band observations are mandatory. Up to now, the number of objects studied during such campaigns is very limited and biased towards high flux states. Aims.We present the results of a dedicated multi-wavelength study of the high-frequency peaked BL Lacertae (HBL) object and known TeV emitter 1ES 2344+514 by means of a pre-organised campaign. Methods.The observations were conducted during simultaneous visibility windows of MAGIC and AGILE in late 2008. The measurements were complemented by Metsähovi, RATAN-600, KVA+Tuorla, Swift and VLBA pointings. Additional coverage was provided by the ongoing long-term F-GAMMA and MOJAVE programs, the OVRO 40-m and CrAO telescopes as well as the Fermi satellite. The obtained SEDs are modelled using a one-zone as well as a self-consistent two-zone synchrotron self-Compton model. Results. 1ES 2344+514 was found at very low flux states in both X-rays and very high energy gamma rays. Variability was detected in the low frequency radio and X-ray bands only, where for the latter a small flare was observed. The X-ray flare was possibly caused by shock acceleration characterised by similar cooling and acceleration time scales. MOJAVE VLBA monitoring reveals a static jet whose components are stable over time scales of eleven years, contrary to previous findings. There appears to be no significant correlation between the 15 GHz and R-band monitoring light curves. The observations presented here constitute the first multi-wavelength campaign on 1ES 2344+514 from radio to VHE energies and one of the few simultaneous SEDs during low activity states. The quasi-simultaneous Fermi-LAT data poses some challenges for SED modelling, but in general the SEDs are described well by both applied models. The resulting parameters are typical for TeV emitting HBLs. Consequently it remains unclear whether a so-called quiescent state was found in this campaign. © 2013 ESO.

AB - Context. BL Lacertae objects are variable at all energy bands on time scales down to minutes. To construct and interpret their spectral energy distribution (SED), simultaneous broad-band observations are mandatory. Up to now, the number of objects studied during such campaigns is very limited and biased towards high flux states. Aims.We present the results of a dedicated multi-wavelength study of the high-frequency peaked BL Lacertae (HBL) object and known TeV emitter 1ES 2344+514 by means of a pre-organised campaign. Methods.The observations were conducted during simultaneous visibility windows of MAGIC and AGILE in late 2008. The measurements were complemented by Metsähovi, RATAN-600, KVA+Tuorla, Swift and VLBA pointings. Additional coverage was provided by the ongoing long-term F-GAMMA and MOJAVE programs, the OVRO 40-m and CrAO telescopes as well as the Fermi satellite. The obtained SEDs are modelled using a one-zone as well as a self-consistent two-zone synchrotron self-Compton model. Results. 1ES 2344+514 was found at very low flux states in both X-rays and very high energy gamma rays. Variability was detected in the low frequency radio and X-ray bands only, where for the latter a small flare was observed. The X-ray flare was possibly caused by shock acceleration characterised by similar cooling and acceleration time scales. MOJAVE VLBA monitoring reveals a static jet whose components are stable over time scales of eleven years, contrary to previous findings. There appears to be no significant correlation between the 15 GHz and R-band monitoring light curves. The observations presented here constitute the first multi-wavelength campaign on 1ES 2344+514 from radio to VHE energies and one of the few simultaneous SEDs during low activity states. The quasi-simultaneous Fermi-LAT data poses some challenges for SED modelling, but in general the SEDs are described well by both applied models. The resulting parameters are typical for TeV emitting HBLs. Consequently it remains unclear whether a so-called quiescent state was found in this campaign. © 2013 ESO.

KW - BL Lacertae objects: individual: 1ES 2344+514

KW - Galaxies: active

KW - Gamma rays: galaxies

KW - Radiation mechanisms: non-thermal

KW - X-rays: individuals: 1ES 2344+514

U2 - 10.1051/0004-6361/201220714

DO - 10.1051/0004-6361/201220714

M3 - Article

VL - 556

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A67

ER -

The simultaneous low state spectral energy distribution of 1ES 2344+514 from radio to very high energies

Abstract

Keywords

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