Search Results - "Bonnoli, G."

The NuSTAR view on hard-TeV BL Lacs by Costamante, L, Bonnoli, G, Tavecchio, F, Ghisellini, G, Tagliaferri, G, Khangulyan, D

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The intergalactic magnetic field constrained by Fermi/Large Area Telescope observations of the TeV blazar 1ES 0229+200 by Tavecchio, F., Ghisellini, G., Foschini, L., Bonnoli, G., Ghirlanda, G., Coppi, P.

“…TeV photons from blazars at relatively large distances, interacting with the optical–infrared cosmic background, are efficiently converted into…”
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Extreme TeV blazars and the intergalactic magnetic field by Tavecchio, F., Ghisellini, G., Bonnoli, G., Foschini, L.

“…We study the four BL Lac objects (RGB J0152+017, 1ES 0229+200, 1ES 0347−121 and PKS 0548−322) detected in the TeV band but not present in the first Fermi-LAT…”
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An emerging population of BL Lacs with extreme properties: towards a class of EBL and cosmic magnetic field probes? by Bonnoli, G., Tavecchio, F., Ghisellini, G., Sbarrato, T.

“…High-energy observations of extreme BL Lac objects, such as 1ES 0229+200 or 1ES 0347−121, recently focused interest both for blazar and jet physics and for the…”
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On the distribution of fluxes of gamma-ray blazars: hints for a stochastic process? by Tavecchio, F, Bonnoli, G, Galanti, G

“…ABSTRACT We examine a model for the observed temporal variability of powerful blazars in the γ-ray band in which the dynamics is described in terms of a…”
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Constraining the location of the emitting region in Fermi blazars through rapid γ-ray variability by Tavecchio, F., Ghisellini, G., Bonnoli, G., Ghirlanda, G.

“…We consider the 1.5-yr Fermi/Large Area Telescope (LAT) light curves (E>100 MeV) of the flat spectrum radio quasars 3C454.3 and PKS1510−089, which show high…”
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The dual nature of blazar fast variability: Space and ground observations of S5 0716+714 by Raiteri, C M, Villata, M, Carosati, D, Benítez, E, Kurtanidze, S O, Gupta, A C, Mirzaqulov, D O, D’Ammando, F, Larionov, V M, Pursimo, T, Acosta-Pulido, J A, Baida, G V, Balmaverde, B, Bonnoli, G, Borman, G A, Carnerero, M I, Chen, W-P, Dhiman, V, Di Maggio, A, Ehgamberdiev, S A, Hiriart, D, Kimeridze, G N, Kurtanidze, O M, Lin, C S, Lopez, J M, Marchini, A, Matsumoto, K, Mujica, R, Nakamura, M, Nikiforova, A A, Nikolashvili, M G, Okhmat, D N, Otero-Santos, J, Rizzi, N, Sakamoto, T, Semkov, E, Sigua, L A, Stiaccini, L, Troitsky, I S, Tsai, A L, Vasilyev, A A, Zhovtan, A V

“…ABSTRACT Blazar S5 0716+714 is well-known for its short-term variability, down to intraday time-scales. We here present the 2-min cadence optical light curve…”
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The γ-ray brightest days of the blazar 3C 454.3 by Bonnoli, G., Ghisellini, G., Foschini, L., Tavecchio, F., Ghirlanda, G.

“…In the first week of 2009 December, the blazar 3C 454.3 became the brightest high-energy source in the sky. Its photon flux reached and surpassed the level of…”
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The red blazar PMN J2345−1555 becomes blue by Ghisellini, G., Tavecchio, F., Foschini, L., Bonnoli, G., Tagliaferri, G.

“…The flat spectrum radio quasar PMN J2345−1555 is a bright γ-ray source, that recently underwent a flaring episode in the infrared (IR), ultraviolet (UV) and…”
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Multiwavelength behaviour of the blazar 3C 279: decade-long study from γ-ray to radio by Larionov, V M, Jorstad, S G, Marscher, A P, Villata, M, Raiteri, C M, Smith, P S, Agudo, I, Savchenko, S S, Morozova, D A, Acosta-Pulido, J A, Aller, M F, Aller, H D, Andreeva, T S, Arkharov, A A, Bachev, R, Bonnoli, G, Borman, G A, Bozhilov, V, Calcidese, P, Carnerero, M I, Carosati, D, Casadio, C, Chen, W-P, Damljanovic, G, Dementyev, A V, Di Paola, A, Frasca, A, Fuentes, A, Gómez, J L, Gónzalez-Morales, P, Giunta, A, Grishina, T S, Gurwell, M A, Hagen-Thorn, V A, Hovatta, T, Ibryamov, S, Joshi, M, Kiehlmann, S, Kim, J-Y, Kimeridze, G N, Kopatskaya, E N, Kovalev, Yu A, Kovalev, Y Y, Kurtanidze, O M, Kurtanidze, S O, Lähteenmäki, A, Lázaro, C, Larionova, L V, Larionova, E G, Leto, G, Marchini, A, Matsumoto, K, Mihov, B, Minev, M, Mingaliev, M G, Mirzaqulov, D, Muñoz Dimitrova, R V, Myserlis, I, Nikiforova, A A, Nikolashvili, M G, Nizhelsky, N A, Ovcharov, E, Pressburger, L D, Rakhimov, I A, Righini, S, Rizzi, N, Sadakane, K, Sadun, A C, Samal, M R, Sanchez, R Z, Semkov, E, Sergeev, S G, Sigua, L A, Slavcheva-Mihova, L, Sola, P, Sotnikova, Yu V, Strigachev, A, Thum, C, Traianou, E, Troitskaya, Yu V, Troitsky, I S, Tsybulev, P G, Vasilyev, A A, Vince, O, Weaver, Z R, Williamson, K E, Zhekanis, G V

“…ABSTRACT We report the results of decade-long (2008–2018) γ-ray to 1 GHz radio monitoring of the blazar 3C 279, including GASP/WEBT, Fermi and Swift data, as…”
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The radio-γ-ray connection in Fermi blazars by Ghirlanda, G., Ghisellini, G., Tavecchio, F., Foschini, L., Bonnoli, G.

“…We study the correlation between the γ-ray flux (F γ), averaged over the first 11 months of the Fermi survey and integrated above 100 MeV, and the radio flux…”
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Rapid quasi-periodic oscillations in the relativistic jet of BL Lacertae by Jorstad, S. G., Marscher, A. P., Raiteri, C. M., Villata, M., Weaver, Z. R., Zhang, H., Dong, L., Gómez, J. L., Perel, M. V., Savchenko, S. S., Larionov, V. M., Carosati, D., Chen, W. P., Kurtanidze, O. M., Marchini, A., Matsumoto, K., Mortari, F., Aceti, P., Acosta-Pulido, J. A., Andreeva, T., Apolonio, G., Arena, C., Arkharov, A., Bachev, R., Banfi, M., Bonnoli, G., Borman, G. A., Bozhilov, V., Carnerero, M. I., Damljanovic, G., Ehgamberdiev, S. A., Elsässer, D., Frasca, A., Gabellini, D., Grishina, T. S., Gupta, A. C., Hagen-Thorn, V. A., Hallum, M. K., Hart, M., Hasuda, K., Hemrich, F., Hsiao, H. Y., Ibryamov, S., Irsmambetova, T. R., Ivanov, D. V., Joner, M. D., Kimeridze, G. N., Klimanov, S. A., Knött, J., Kopatskaya, E. N., Kurtanidze, S. O., Kurtenkov, A., Kuutma, T., Larionova, E. G., Leonini, S., Lin, H. C., Lorey, C., Mannheim, K., Marino, G., Minev, M., Mirzaqulov, D. O., Morozova, D. A., Nikiforova, A. A., Nikolashvili, M. G., Ovcharov, E., Papini, R., Pursimo, T., Rahimov, I., Reinhart, D., Sakamoto, T., Salvaggio, F., Semkov, E., Shakhovskoy, D. N., Sigua, L. A., Steineke, R., Stojanovic, M., Strigachev, A., Troitskaya, Y. V., Troitskiy, I. S., Tsai, A., Valcheva, A., Vasilyev, A. A., Vince, O., Waller, L., Zaharieva, E., Chatterjee, R.

“…Blazars are active galactic nuclei (AGN) with relativistic jets whose non-thermal radiation is extremely variable on various timescales 1 – 3 . This…”
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Constraining blazar distances with combined Fermi and TeV data: an empirical approach by Prandini, E., Bonnoli, G., Maraschi, L., Mariotti, M., Tavecchio, F.

“…We discuss a method to constrain the distance of blazars with unknown redshift using combined observations in the GeV and TeV regimes. We assume that the Very…”
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The PDS 110 observing campaign – photometric and spectroscopic observations reveal eclipses are aperiodic by Osborn, H P, Kenworthy, M, Rodriguez, J E, de Mooij, E J W, Kennedy, G M, Relles, H, Gomez, E, Hippke, M, Banfi, M, Barbieri, L, Becker, I S, Benni, P, Berlind, P, Bieryla, A, Bonnoli, G, Boussier, H, Brincat, S M, Briol, J, Burleigh, M R, Butterley, T, Calkins, M L, Chote, P, Ciceri, S, Deldem, M, Dhillon, V S, Dose, E, Dubois, F, Dvorak, S, Esquerdo, G A, Evans, D F, Ferratfiat, S, Fossey, S J, Günther, M N, Hall, J, Hambsch, F-J, Herrero, E, Hills, K, James, R, Jayawardhana, R, Kafka, S, Killestein, T L, Kotnik, C, Latham, D W, Lemay, D, Lewin, P, Littlefair, S, Lopresti, C, Mallonn, M, Mancini, L, Marchini, A, McCormac, J J, Murawski, G, Myers, G, Papini, R, Popov, V, Quadri, U, Quinn, S N, Raynard, L, Rizzuti, L, Robertson, J, Salvaggio, F, Scholz, A, Sfair, R, Smith, A M S, Southworth, J, Tan, T G, Vanaverbeke, S, Waagen, E O, Watson, C A, West, R G, Winter, O C, Wheatley, P J, Wilson, R W, Zhou, G

“…Abstract PDS 110 is a young disc-hosting star in the Orion OB1A association. Two dimming events of similar depth and duration were seen in 2008 (WASP) and 2011…”
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Does the gamma-ray flux of the blazar 3C 454.3 vary on subhour time-scales? by Foschini, L., Tagliaferri, G., Ghisellini, G., Ghirlanda, G., Tavecchio, F., Bonnoli, G.

“…In the early days of 2010 April, the blazar 3C 454.3 (z= 0.859) underwent a strong γ-ray outburst, reaching fluxes (E > 100 MeV) in excess of 10−5 photon cm−2…”
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DETECTION OF THE γ-RAY BINARY LS I +61°303 IN A LOW-FLUX STATE AT VERY HIGH ENERGY γ-RAYS WITH THE MAGIC TELESCOPES IN 2009 by ALEKSIC, J, ALVAREZ, E. A, BERDYUGIN, A, BERGFR, K, BERNARDINI, E, BILAND, A, BLANCH, O, BOCK, R. K, BOLLER, A, BONNOLI, G, BORLA TRIDON, D, BOSCH-RAMON, V, ANTONELLI, L. A, BRAUN, I, BRETZ, T, CANELLAS, A, CARMONA, E, CAROSI, A, COLIN, P, COLOMBO, E, CONTRERAS, J. L, CORTINA, J, COSSIO, L, ANTORANZ, P, COVINO, S, DAZZI, F, DE ANGELIS, A, DE CANEVA, G, DE CEA DEAL POZO, E, DE LOTTO, B, DELGADO MENDEZ, C, DIAGO ORTEGA, A, DOERT, M, DOMINGUEZ, A, ASENSIO, M, DOMINIS PRESTER, D, DORNER, D, DORO, M, ELSAESSER, D, FERENC, D, FONSECA, M. V, FONT, L, FRUCK, C, GARCIA LOPEZ, R. J, GARCZARCZYK, M, BACKES, M, GARRIDO, D, GIAVITTO, G, GODINOVIC, N, HADASCH, D, HÄFNER, D, HERRERO, A, HILDEBRAND, D, HÖHNE-MÖNCH, D, HOSE, J, HRUPEC, D, BARRIO, J. A, BASTIERI, D, BECERRA GONZALEZ, J, BEDNAREK, W

“…We present very high energy (E > 100 GeV) gamma -ray observations of the gamma -ray binary system LS I +61[degrees]303 obtained with the MAGIC stereo system…”
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Teraelectronvolt emission from the γ-ray burst GRB 190114C

“…Long-duration γ-ray bursts (GRBs) are the most luminous sources of electromagnetic radiation known in the Universe. They arise from outflows of plasma with…”
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The major upgrade of the MAGIC telescopes, Part II: A performance study using observations of the Crab Nebula by Aleksić, J., Bangale, P., Barceló, M., Bednarek, W., Biasuzzi, B., Bitossi, M., Blanch, O., Bonnefoy, S., Bretz, T., Carmona, E., Carosi, A., Cecchi, R., Colin, P., Colombo, E., Contreras, J.L., Corti, D., Cortina, J., Covino, S., Da Vela, P., De Angelis, A., De Caneva, G., De Lotto, B., de Oña Wilhelmi, E., Delgado Mendez, C., Dettlaff, A., Dorner, D., Einecke, S., Fidalgo, D., Fink, D., Fonseca, M.V., Font, L., Galindo, D., Garrido Terrats, D., Gaug, M., Godinović, N., González Muñoz, A., Hanabata, Y., Herrera, J., Hose, J., Idec, W., Illa, J.M., Kodani, K., Konno, Y., Krause, J., Kubo, H., Lemus, J.L., Lindfors, E., Longo, F., López-Coto, R., López-Oramas, A., Lorca, A., Mallot, K., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Menzel, U., Mirzoyan, R., Moralejo, A., Munar-Adrover, P., Nakajima, D., Negrello, M., Neustroev, V., Niedzwiecki, A., Nishijima, K., Noda, K., Orito, R., Overkemping, A., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J.M., Persic, M., Poutanen, J., Prandini, E., Rico, J., Rodriguez Garcia, J., Rügamer, S., Saito, T., Scapin, V., Shore, S.N., Sitarek, J., Snidaric, I., Spanier, F., Stamerra, A., Steinbring, T., Storz, J., Takami, H., Tavecchio, F., Tescaro, D., Teshima, M., Tibolla, O., Torres, D.F., Toyama, T., Treves, A., Wetteskind, H., Will, M., Zanin, R.

“…MAGIC is a system of two Imaging Atmospheric Cherenkov Telescopes located in the Canary island of La Palma, Spain. During summer 2011 and 2012 it underwent a…”
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The major upgrade of the MAGIC telescopes, Part I: The hardware improvements and the commissioning of the system by Aleksić, J., Antoranz, P., Bangale, P., Barceló, M., Bednarek, W., Bitossi, M., Blanch, O., Bonnefoy, S., Bretz, T., Carmona, E., Carosi, A., Cecchi, R., Colin, P., Colombo, E., Contreras, J.L., Corti, D., Cortina, J., Covino, S., Da Vela, P., De Caneva, G., De Lotto, B., de Oña Wilhelmi, E., Delgado Mendez, C., Dettlaff, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Fink, D., Fonseca, M.V., Font, L., Galindo, D., Gaug, M., Godinović, N., González Muñoz, A., Hanabata, Y., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Idec, W., Illa, J.M., Kodani, K., Konno, Y., Krause, J., Kubo, H., Lemus, J.L., López-Coto, R., López-Oramas, A., Lorca, A., Mallot, K., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Menzel, U., Miranda, J.M., Mirzoyan, R., Moralejo, A., Munar-Adrover, P., Negrello, M., Neustroev, V., Niedzwiecki, A., Nilsson, K., Noda, K., Orito, R., Overkemping, A., Palatiello, M., Paneque, D., Paredes, J.M., Persic, M., Poutanen, J., Prandini, E., Puljak, I., Rico, J., Rodriguez Garcia, J., Rügamer, S., Saito, K., Schultz, C., Sobczynska, D., Spanier, F., Stamerra, A., Steinbring, T., Storz, J., Takalo, L., Takami, H., Tavecchio, F., Tejedor, L.A., Temnikov, P., Terzić, T., Teshima, M., Thaele, J., Torres, D.F., Toyama, T., Vogler, P., Wetteskind, H., Will, M., Zanin, R.

“…The MAGIC telescopes are two Imaging Atmospheric Cherenkov Telescopes (IACTs) located on the Canary island of La Palma. The telescopes are designed to measure…”
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A cut-off in the TeV gamma-ray spectrum of the SNR Cassiopeia A by Ahnen, M. L., Ansoldi, S., Arcaro, C., Babić, A., Bangale, P., Barres de Almeida, U., Becerra González, J., Bednarek, W., Bernardini, E., Berti, A., Biasuzzi, B., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Chatterjee, A., Colin, P., Colombo, E., Contreras, J. L., Cumani, P., Da Vela, P., Dazzi, F., De Angelis, A., de Oña Wilhelmi, E., Dominis Prester, D., Dorner, D., Eisenacher Glawion, D., Elsaesser, D., Engelkemeier, M., Fallah Ramazani, V., Fernández-Barral, A., Fidalgo, D., Font, L., Fruck, C., Galindo, D., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Gora, D., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Konno, Y., Kubo, H., Kushida, J., Kuveždić, D., Lelas, D., Maggio, C., Makariev, M., Maneva, G., Manganaro, M., Maraschi, L., Mariotti, M., Martínez, M., Minev, M., Mirzoyan, R., Moreno, V., Moretti, E., Neustroev, V., Niedzwiecki, A., Nilsson, K., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paoletti, R., Paredes, J. M., Perri, L., Prada Moroni, P. G., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Righi, C., Satalecka, K., Schweizer, T., Shore, S. N., Stamerra, A., Strzys, M., Surić, T., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Torres-Albà, N., Treves, A., Vanzo, G., Vovk, I., Ward, J. E., Zarić, D.

“…Abstract It is widely believed that the bulk of the Galactic cosmic rays is accelerated in supernova remnants (SNRs). However, no observational evidence of the…”
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