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Title: Investigation of the correlation patterns and the Compton dominance variability of Mrk 421 in 2017

Abstract

We present a detailed characterisation and theoretical interpretation of the broadband emission of the paradigmatic TeV blazar Mrk 421, with a special focus on the multi-band flux correlations. The dataset has been collected through an extensive multi-wavelength campaign organised between 2016 December and 2017 June. The instruments involved are MAGIC, FACT, Fermi-LAT, Swift, GASP-WEBT, OVRO, Medicina, and Metsähovi. Additionally, four deep exposures (several hours long) with simultaneous MAGIC and NuSTAR observations allowed a precise measurement of the falling segments of the two spectral components. The very-high-energy (VHE; E> 100 GeV) gamma rays and X-rays are positively correlated at zero time lag, but the strength and characteristics of the correlation change substantially across the various energy bands probed. The VHE versus X-ray fluxes follow different patterns, partly due to substantial changes in the Compton dominance for a few days without a simultaneous increase in the X-ray flux (i.e., orphan gamma-ray activity). Studying the broadband spectral energy distribution (SED) during the days including NuSTAR observations, we show that these changes can be explained within a one-zone leptonic model with a blob that increases its size over time. The peak frequency of the synchrotron bump varies by two orders of magnitude throughout themore » campaign. Our multi-band correlation study also hints at an anti-correlation between UV-optical and X-ray at a significance higher than 3σ. A VHE flare observed on MJD 57788 (2017 February 4) shows gamma-ray variability on multi-hour timescales, with a factor ten increase in the TeV flux but only a moderate increase in the keV flux. The related broadband SED is better described by a two-zone leptonic scenario rather than by a one-zone scenario. We find that the flare can be produced by the appearance of a compact second blob populated by high energetic electrons spanning a narrow range of Lorentz factors, from γ'min=2x104 to γ'max=6x105.« less

Authors:
 [1]; ; ; ORCiD logo; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
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  1. Universidad de La Laguna, Tenerife (Spain); MAGIC Collaboration.et al.
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Contributing Org.:
MAGIC Collaboration
OSTI Identifier:
1870832
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Astronomy and Astrophysics
Additional Journal Information:
Journal Volume: 655; Journal ID: ISSN 0004-6361
Publisher:
EDP Sciences
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; galaxies; active / BL Lacertae objects; individual; Mrk 421/radiation mechanisms; non-thermal

Citation Formats

Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Artero, M., Asano, K., Babić, A., Baquero, A., Barres de Almeida, U., Barrio, J. A., Batković, I., Becerra González, J., Bednarek, W., Bellizzi, L., Bernardini, E., Bernardos, M., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Blanch, O., Bošnjak, Ž., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D’Amico, G., D’Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Delgado Mendez, C., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espiñeira, E., Dominis Prester, D., Donini, A., Doro, M., Fallah Ramazani, V., Fattorini, A., Ferrara, G., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., García López, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinović, N., Green, J. G., Green, D., Hadasch, D., Hahn, A., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., Hütten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jiménez, I., Jormanainen, J., Jouvin, L., Kajiwara, Y., Karjalainen, M., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., López-Coto, R., López-Moya, M., López-Oramas, A., Loporchio, S., Machado de Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Menchiari, S., Mender, S., Mićanović, S., Miceli, D., Miener, T., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Neustroev, V., Nigro, C., Nilsson, K., Nishijima, K., Noda, K., Nozaki, S., Ohtani, Y., Oka, T., Otero-Santos, J., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Pavletić, L., Peñil, P., Perennes, C., Persic, M., Prada Moroni, P. G., Prandini, E., Priyadarshi, C., Puljak, I., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Saturni, F. G., Schmidt, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Spolon, A., Stamerra, A., Strom, D., Strzys, M., Suda, Y., Surić, T., Takahashi, M., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Tosti, L., Truzzi, S., Tutone, A., Ubach, S., van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Ventura, S., Verguilov, V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Wunderlich, C., Zarić, D., Baack, D., Balbo, M., Biederbeck, N., Biland, A., Bretz, T., Buss, J., Dorner, D., Eisenberger, L., Elsaesser, D., Hildebrand, D., Iotov, R., Mannheim, K., Neise, D., Noethe, M., Paravac, A., Rhode, W., Schleicher, B., Sliusar, V., Walter, R., D’Ammando, F., Horan, D., Lien, A. Y., Baloković, M., Madejski, G. M., Perri, M., Verrecchia, F., Leto, C., Lähteenmäki, A., Tornikoski, M., Ramakrishnan, V., Järvelä, E., Vera, R. C., Chamani, W., Villata, M., Raiteri, C. M., Gupta, A. C., Pandey, A., Fuentes, A., Agudo, I., Casadio, C., Semkov, E., Ibryamov, S., Marchini, A., Bachev, R., Strigachev, A., Ovcharov, E., Bozhilov, V., Valcheva, A., Zaharieva, E., Damljanovic, G., Vince, O., Larionov, V. M., Borman, G. A., Grishina, T. S., Hagen-Thorn, V. A., Kopatskaya, E. N., Larionova, E. G., Larionova, L. V., Morozova, D. A., Nikiforova, A. A., Savchenko, S. S., Troitskiy, I. S., Troitskaya, Y. V., Vasilyev, A. A., Merkulova, O. A., Chen, W. P., Samal, M., Lin, H. C., Moody, J. W., Sadun, A. C., Jorstad, S. G., Marscher, A. P., Weaver, Z. R., Feige, M., Kania, J., Kopp, M., Kunkel, L., Reinhart, D., Scherbantin, A., Schneider, L., Lorey, C., Acosta-Pulido, J. A., Carnerero, M. I., Carosati, D., Kurtanidze, S. O., Kurtanidze, O. M., Nikolashvili, M. G., Chigladze, R. A., Ivanidze, R. Z., Kimeridze, G. N., Sigua, L. A., Joner, M. D., Spencer, M., Giroletti, M., Marchili, N., Righini, S., Rizzi, N., and Bonnoli, G. Investigation of the correlation patterns and the Compton dominance variability of Mrk 421 in 2017. United States: N. p., 2021. Web. doi:10.1051/0004-6361/202141004.
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Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Artero, M., Asano, K., Babić, A., Baquero, A., Barres de Almeida, U., Barrio, J. A., Batković, I., Becerra González, J., Bednarek, W., Bellizzi, L., Bernardini, E., Bernardos, M., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Blanch, O., Bošnjak, Ž., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D’Amico, G., D’Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Delgado Mendez, C., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espiñeira, E., Dominis Prester, D., Donini, A., Doro, M., Fallah Ramazani, V., Fattorini, A., Ferrara, G., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., García López, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinović, N., Green, J. G., Green, D., Hadasch, D., Hahn, A., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., Hütten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jiménez, I., Jormanainen, J., Jouvin, L., Kajiwara, Y., Karjalainen, M., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., López-Coto, R., López-Moya, M., López-Oramas, A., Loporchio, S., Machado de Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Menchiari, S., Mender, S., Mićanović, S., Miceli, D., Miener, T., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Neustroev, V., Nigro, C., Nilsson, K., Nishijima, K., Noda, K., Nozaki, S., Ohtani, Y., Oka, T., Otero-Santos, J., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Pavletić, L., Peñil, P., Perennes, C., Persic, M., Prada Moroni, P. G., Prandini, E., Priyadarshi, C., Puljak, I., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Saturni, F. G., Schmidt, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Spolon, A., Stamerra, A., Strom, D., Strzys, M., Suda, Y., Surić, T., Takahashi, M., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Tosti, L., Truzzi, S., Tutone, A., Ubach, S., van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Ventura, S., Verguilov, V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Wunderlich, C., Zarić, D., Baack, D., Balbo, M., Biederbeck, N., Biland, A., Bretz, T., Buss, J., Dorner, D., Eisenberger, L., Elsaesser, D., Hildebrand, D., Iotov, R., Mannheim, K., Neise, D., Noethe, M., Paravac, A., Rhode, W., Schleicher, B., Sliusar, V., Walter, R., D’Ammando, F., Horan, D., Lien, A. Y., Baloković, M., Madejski, G. M., Perri, M., Verrecchia, F., Leto, C., Lähteenmäki, A., Tornikoski, M., Ramakrishnan, V., Järvelä, E., Vera, R. C., Chamani, W., Villata, M., Raiteri, C. M., Gupta, A. C., Pandey, A., Fuentes, A., Agudo, I., Casadio, C., Semkov, E., Ibryamov, S., Marchini, A., Bachev, R., Strigachev, A., Ovcharov, E., Bozhilov, V., Valcheva, A., Zaharieva, E., Damljanovic, G., Vince, O., Larionov, V. M., Borman, G. A., Grishina, T. S., Hagen-Thorn, V. A., Kopatskaya, E. N., Larionova, E. G., Larionova, L. V., Morozova, D. A., Nikiforova, A. A., Savchenko, S. S., Troitskiy, I. S., Troitskaya, Y. V., Vasilyev, A. A., Merkulova, O. A., Chen, W. P., Samal, M., Lin, H. C., Moody, J. W., Sadun, A. C., Jorstad, S. G., Marscher, A. P., Weaver, Z. R., Feige, M., Kania, J., Kopp, M., Kunkel, L., Reinhart, D., Scherbantin, A., Schneider, L., Lorey, C., Acosta-Pulido, J. A., Carnerero, M. I., Carosati, D., Kurtanidze, S. O., Kurtanidze, O. M., Nikolashvili, M. G., Chigladze, R. A., Ivanidze, R. Z., Kimeridze, G. N., Sigua, L. A., Joner, M. D., Spencer, M., Giroletti, M., Marchili, N., Righini, S., Rizzi, N., & Bonnoli, G. Investigation of the correlation patterns and the Compton dominance variability of Mrk 421 in 2017. United States. https://doi.org/10.1051/0004-6361/202141004
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Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Artero, M., Asano, K., Babić, A., Baquero, A., Barres de Almeida, U., Barrio, J. A., Batković, I., Becerra González, J., Bednarek, W., Bellizzi, L., Bernardini, E., Bernardos, M., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Blanch, O., Bošnjak, Ž., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D’Amico, G., D’Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Delgado Mendez, C., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espiñeira, E., Dominis Prester, D., Donini, A., Doro, M., Fallah Ramazani, V., Fattorini, A., Ferrara, G., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., García López, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinović, N., Green, J. G., Green, D., Hadasch, D., Hahn, A., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., Hütten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jiménez, I., Jormanainen, J., Jouvin, L., Kajiwara, Y., Karjalainen, M., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., López-Coto, R., López-Moya, M., López-Oramas, A., Loporchio, S., Machado de Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Menchiari, S., Mender, S., Mićanović, S., Miceli, D., Miener, T., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Neustroev, V., Nigro, C., Nilsson, K., Nishijima, K., Noda, K., Nozaki, S., Ohtani, Y., Oka, T., Otero-Santos, J., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Pavletić, L., Peñil, P., Perennes, C., Persic, M., Prada Moroni, P. G., Prandini, E., Priyadarshi, C., Puljak, I., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Saturni, F. G., Schmidt, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Spolon, A., Stamerra, A., Strom, D., Strzys, M., Suda, Y., Surić, T., Takahashi, M., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Tosti, L., Truzzi, S., Tutone, A., Ubach, S., van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Ventura, S., Verguilov, V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Wunderlich, C., Zarić, D., Baack, D., Balbo, M., Biederbeck, N., Biland, A., Bretz, T., Buss, J., Dorner, D., Eisenberger, L., Elsaesser, D., Hildebrand, D., Iotov, R., Mannheim, K., Neise, D., Noethe, M., Paravac, A., Rhode, W., Schleicher, B., Sliusar, V., Walter, R., D’Ammando, F., Horan, D., Lien, A. Y., Baloković, M., Madejski, G. M., Perri, M., Verrecchia, F., Leto, C., Lähteenmäki, A., Tornikoski, M., Ramakrishnan, V., Järvelä, E., Vera, R. C., Chamani, W., Villata, M., Raiteri, C. M., Gupta, A. C., Pandey, A., Fuentes, A., Agudo, I., Casadio, C., Semkov, E., Ibryamov, S., Marchini, A., Bachev, R., Strigachev, A., Ovcharov, E., Bozhilov, V., Valcheva, A., Zaharieva, E., Damljanovic, G., Vince, O., Larionov, V. M., Borman, G. A., Grishina, T. S., Hagen-Thorn, V. A., Kopatskaya, E. N., Larionova, E. G., Larionova, L. V., Morozova, D. A., Nikiforova, A. A., Savchenko, S. S., Troitskiy, I. S., Troitskaya, Y. V., Vasilyev, A. A., Merkulova, O. A., Chen, W. P., Samal, M., Lin, H. C., Moody, J. W., Sadun, A. C., Jorstad, S. G., Marscher, A. P., Weaver, Z. R., Feige, M., Kania, J., Kopp, M., Kunkel, L., Reinhart, D., Scherbantin, A., Schneider, L., Lorey, C., Acosta-Pulido, J. A., Carnerero, M. I., Carosati, D., Kurtanidze, S. O., Kurtanidze, O. M., Nikolashvili, M. G., Chigladze, R. A., Ivanidze, R. Z., Kimeridze, G. N., Sigua, L. A., Joner, M. D., Spencer, M., Giroletti, M., Marchili, N., Righini, S., Rizzi, N., and Bonnoli, G. Mon . "Investigation of the correlation patterns and the Compton dominance variability of Mrk 421 in 2017". United States. https://doi.org/10.1051/0004-6361/202141004. https://www.osti.gov/servlets/purl/1870832.
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@article{osti_1870832,
title = {Investigation of the correlation patterns and the Compton dominance variability of Mrk 421 in 2017},
author = {Acciari, V. A. and Ansoldi, S. and Antonelli, L. A. and Arbet Engels, A. and Artero, M. and Asano, K. and Babić, A. and Baquero, A. and Barres de Almeida, U. and Barrio, J. A. and Batković, I. and Becerra González, J. and Bednarek, W. and Bellizzi, L. and Bernardini, E. and Bernardos, M. and Berti, A. and Besenrieder, J. and Bhattacharyya, W. and Bigongiari, C. and Blanch, O. and Bošnjak, Ž. and Busetto, G. and Carosi, R. and Ceribella, G. and Cerruti, M. and Chai, Y. and Chilingarian, A. and Cikota, S. and Colak, S. M. and Colombo, E. and Contreras, J. L. and Cortina, J. and Covino, S. and D’Amico, G. and D’Elia, V. and Da Vela, P. and Dazzi, F. and De Angelis, A. and De Lotto, B. and Delfino, M. and Delgado, J. and Delgado Mendez, C. and Depaoli, D. and Di Pierro, F. and Di Venere, L. and Do Souto Espiñeira, E. and Dominis Prester, D. and Donini, A. and Doro, M. and Fallah Ramazani, V. and Fattorini, A. and Ferrara, G. and Fonseca, M. V. and Font, L. and Fruck, C. and Fukami, S. and García López, R. J. and Garczarczyk, M. and Gasparyan, S. and Gaug, M. and Giglietto, N. and Giordano, F. and Gliwny, P. and Godinović, N. and Green, J. G. and Green, D. and Hadasch, D. and Hahn, A. and Heckmann, L. and Herrera, J. and Hoang, J. and Hrupec, D. and Hütten, M. and Inada, T. and Inoue, S. and Ishio, K. and Iwamura, Y. and Jiménez, I. and Jormanainen, J. and Jouvin, L. and Kajiwara, Y. and Karjalainen, M. and Kerszberg, D. and Kobayashi, Y. and Kubo, H. and Kushida, J. and Lamastra, A. and Lelas, D. and Leone, F. and Lindfors, E. and Lombardi, S. and Longo, F. and López-Coto, R. and López-Moya, M. and López-Oramas, A. and Loporchio, S. and Machado de Oliveira Fraga, B. and Maggio, C. and Majumdar, P. and Makariev, M. and Mallamaci, M. and Maneva, G. and Manganaro, M. and Maraschi, L. and Mariotti, M. and Martínez, M. and Mazin, D. and Menchiari, S. and Mender, S. and Mićanović, S. and Miceli, D. and Miener, T. and Minev, M. and Miranda, J. M. and Mirzoyan, R. and Molina, E. and Moralejo, A. and Morcuende, D. and Moreno, V. and Moretti, E. and Neustroev, V. and Nigro, C. and Nilsson, K. and Nishijima, K. and Noda, K. and Nozaki, S. and Ohtani, Y. and Oka, T. and Otero-Santos, J. and Paiano, S. and Palatiello, M. and Paneque, D. and Paoletti, R. and Paredes, J. M. and Pavletić, L. and Peñil, P. and Perennes, C. and Persic, M. and Prada Moroni, P. G. and Prandini, E. and Priyadarshi, C. and Puljak, I. and Ribó, M. and Rico, J. and Righi, C. and Rugliancich, A. and Saha, L. and Sahakyan, N. and Saito, T. and Sakurai, S. and Satalecka, K. and Saturni, F. G. and Schmidt, K. and Schweizer, T. and Sitarek, J. and Šnidarić, I. and Sobczynska, D. and Spolon, A. and Stamerra, A. and Strom, D. and Strzys, M. and Suda, Y. and Surić, T. and Takahashi, M. and Tavecchio, F. and Temnikov, P. and Terzić, T. and Teshima, M. and Tosti, L. and Truzzi, S. and Tutone, A. and Ubach, S. and van Scherpenberg, J. and Vanzo, G. and Vazquez Acosta, M. and Ventura, S. and Verguilov, V. and Vigorito, C. F. and Vitale, V. and Vovk, I. and Will, M. and Wunderlich, C. and Zarić, D. and Baack, D. and Balbo, M. and Biederbeck, N. and Biland, A. and Bretz, T. and Buss, J. and Dorner, D. and Eisenberger, L. and Elsaesser, D. and Hildebrand, D. and Iotov, R. and Mannheim, K. and Neise, D. and Noethe, M. and Paravac, A. and Rhode, W. and Schleicher, B. and Sliusar, V. and Walter, R. and D’Ammando, F. and Horan, D. and Lien, A. Y. and Baloković, M. and Madejski, G. M. and Perri, M. and Verrecchia, F. and Leto, C. and Lähteenmäki, A. and Tornikoski, M. and Ramakrishnan, V. and Järvelä, E. and Vera, R. C. and Chamani, W. and Villata, M. and Raiteri, C. M. and Gupta, A. C. and Pandey, A. and Fuentes, A. and Agudo, I. and Casadio, C. and Semkov, E. and Ibryamov, S. and Marchini, A. and Bachev, R. and Strigachev, A. and Ovcharov, E. and Bozhilov, V. and Valcheva, A. and Zaharieva, E. and Damljanovic, G. and Vince, O. and Larionov, V. M. and Borman, G. A. and Grishina, T. S. and Hagen-Thorn, V. A. and Kopatskaya, E. N. and Larionova, E. G. and Larionova, L. V. and Morozova, D. A. and Nikiforova, A. A. and Savchenko, S. S. and Troitskiy, I. S. and Troitskaya, Y. V. and Vasilyev, A. A. and Merkulova, O. A. and Chen, W. P. and Samal, M. and Lin, H. C. and Moody, J. W. and Sadun, A. C. and Jorstad, S. G. and Marscher, A. P. and Weaver, Z. R. and Feige, M. and Kania, J. and Kopp, M. and Kunkel, L. and Reinhart, D. and Scherbantin, A. and Schneider, L. and Lorey, C. and Acosta-Pulido, J. A. and Carnerero, M. I. and Carosati, D. and Kurtanidze, S. O. and Kurtanidze, O. M. and Nikolashvili, M. G. and Chigladze, R. A. and Ivanidze, R. Z. and Kimeridze, G. N. and Sigua, L. A. and Joner, M. D. and Spencer, M. and Giroletti, M. and Marchili, N. and Righini, S. and Rizzi, N. and Bonnoli, G.},
abstractNote = {We present a detailed characterisation and theoretical interpretation of the broadband emission of the paradigmatic TeV blazar Mrk 421, with a special focus on the multi-band flux correlations. The dataset has been collected through an extensive multi-wavelength campaign organised between 2016 December and 2017 June. The instruments involved are MAGIC, FACT, Fermi-LAT, Swift, GASP-WEBT, OVRO, Medicina, and Metsähovi. Additionally, four deep exposures (several hours long) with simultaneous MAGIC and NuSTAR observations allowed a precise measurement of the falling segments of the two spectral components. The very-high-energy (VHE; E> 100 GeV) gamma rays and X-rays are positively correlated at zero time lag, but the strength and characteristics of the correlation change substantially across the various energy bands probed. The VHE versus X-ray fluxes follow different patterns, partly due to substantial changes in the Compton dominance for a few days without a simultaneous increase in the X-ray flux (i.e., orphan gamma-ray activity). Studying the broadband spectral energy distribution (SED) during the days including NuSTAR observations, we show that these changes can be explained within a one-zone leptonic model with a blob that increases its size over time. The peak frequency of the synchrotron bump varies by two orders of magnitude throughout the campaign. Our multi-band correlation study also hints at an anti-correlation between UV-optical and X-ray at a significance higher than 3σ. A VHE flare observed on MJD 57788 (2017 February 4) shows gamma-ray variability on multi-hour timescales, with a factor ten increase in the TeV flux but only a moderate increase in the keV flux. The related broadband SED is better described by a two-zone leptonic scenario rather than by a one-zone scenario. We find that the flare can be produced by the appearance of a compact second blob populated by high energetic electrons spanning a narrow range of Lorentz factors, from γ'min=2x104 to γ'max=6x105.},
doi = {10.1051/0004-6361/202141004},
journal = {Astronomy and Astrophysics},
number = ,
volume = 655,
place = {United States},
year = {Mon Nov 29 00:00:00 EST 2021},
month = {Mon Nov 29 00:00:00 EST 2021}
}
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Works referenced in this record:

The Swift X-Ray Telescope
journal, October 2005

Structured jets in TeV BL Lac objects and radiogalaxies: Implications for the observed properties
journal, March 2005

The connection between x-ray- and radio-selected BL Lacertae objects
journal, May 1995

  • Padovani, Paolo; Giommi, Paolo
  • The Astrophysical Journal, Vol. 444
  • DOI: 10.1086/175631

Combined synchrotron and nonlinear synchrotron-self-Compton cooling of relativistic electrons
journal, September 2010

The major upgrade of the MAGIC telescopes, Part II: A performance study using observations of the Crab Nebula
journal, January 2016

Polarimetric Observations of 15 Active Galactic Nuclei at High Frequencies: Jet Kinematics from Bimonthly Monitoring with the Very Long Baseline Array
journal, October 2005

  • Jorstad, Svetlana G.; Marscher, Alan P.; Lister, Matthew L.
  • The Astronomical Journal, Vol. 130, Issue 4
  • DOI: 10.1086/444593

Observation of Markarian 421 in TeV gamma rays over a 14-year time span
journal, February 2014

A jet model for the gamma-ray emitting blazar 3C 279
journal, September 1992

  • Maraschi, L.; Ghisellini, G.; Celotti, A.
  • The Astrophysical Journal, Vol. 397
  • DOI: 10.1086/186531

Long-term multi-wavelength variability and correlation study of Markarian 421 from 2007 to 2009
journal, September 2016

VARIABLE TeV EMISSION AS A MANIFESTATION OF JET FORMATION IN M87?
journal, March 2011

The Great Markarian 421 Flare of 2010 February: Multiwavelength Variability and Correlation Studies
journal, February 2020

Relativistic Reconnection: an Efficient Source of Non-Thermal Particles
journal, February 2014

The unprecedented optical outburst of the quasar 3C 454.3: The WEBT campaign of 2004–2005
journal, June 2006

LEPTONIC AND HADRONIC MODELING OF FERMI -DETECTED BLAZARS
journal, April 2013

MULTIWAVELENGTH STUDY OF QUIESCENT STATES OF Mrk 421 WITH UNPRECEDENTED HARD X-RAY COVERAGE PROVIDED BY NuSTAR IN 2013
journal, March 2016

The WEBT BL Lacertae Campaign 2000
journal, July 2002

TeV BL Lac objects at the dawn of the Fermi era
journal, January 2010

Blazar spectral variability as explained by a twisted inhomogeneous jet
journal, December 2017

  • Raiteri, C. M.; Villata, M.; Acosta-Pulido, J. A.
  • Nature, Vol. 552, Issue 7685
  • DOI: 10.1038/nature24623

Kinetic simulations of mildly relativistic shocks – I. Particle acceleration in high Mach number shocks
journal, January 2019

  • Crumley, P.; Caprioli, D.; Markoff, S.
  • Monthly Notices of the Royal Astronomical Society, Vol. 485, Issue 4
  • DOI: 10.1093/mnras/stz232

Log-parabolic spectra and particle acceleration in blazars: III. SSC emission in the TeV band from Mkn 501
journal, March 2006

Detection of TeV photons from the active galaxy Markarian 421
journal, August 1992

  • Punch, M.; Akerlof, C. W.; Cawley, M. F.
  • Nature, Vol. 358, Issue 6386
  • DOI: 10.1038/358477a0

The discrete correlation function - A new method for analyzing unevenly sampled variability data
journal, October 1988

  • Edelson, R. A.; Krolik, J. H.
  • The Astrophysical Journal, Vol. 333
  • DOI: 10.1086/166773

Correcting for the Effects of Interstellar Extinction
journal, January 1999

  • Fitzpatrick, Edward L.
  • Publications of the Astronomical Society of the Pacific, Vol. 111, Issue 755
  • DOI: 10.1086/316293

The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
journal, September 2005

Dissecting the long-term emission behaviour of the BL Lac object Mrk 421
journal, August 2017

  • Carnerero, M. I.; Raiteri, C. M.; Villata, M.
  • Monthly Notices of the Royal Astronomical Society, Vol. 472, Issue 4
  • DOI: 10.1093/mnras/stx2185

Signatures of synchrotron emission and of electron acceleration in the X-ray spectra of Mrk 421
journal, February 2007

FACT - Searching for periodicity in five-year light-curves of Active Galactic Nuclei
conference, August 2018

  • Mahlke, Max; Bretz, Thomas; Adam, J.
  • Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)
  • DOI: 10.22323/1.301.0612

Constraints on the Physical Parameters of TeV Blazars
journal, December 1998

  • Tavecchio, Fabrizio; Maraschi, Laura; Ghisellini, Gabriele
  • The Astrophysical Journal, Vol. 509, Issue 2
  • DOI: 10.1086/306526

GAMMA-RAY LIGHT CURVES AND VARIABILITY OF BRIGHT FERMI -DETECTED BLAZARS
journal, September 2010

Extragalactic background light inferred from AEGIS galaxy-SED-type fractions: EBL from AEGIS galaxy-SED-type fractions
journal, October 2010

FERMI LARGE AREA TELESCOPE OBSERVATIONS OF MARKARIAN 421: THE MISSING PIECE OF ITS SPECTRAL ENERGY DISTRIBUTION
journal, July 2011

A Multiwavelength View of the TeV Blazar Markarian 421: Correlated Variability, Flaring, and Spectral Evolution
journal, September 2005

  • Błażejowski, M.; Blaylock, G.; Bond, I. H.
  • The Astrophysical Journal, Vol. 630, Issue 1
  • DOI: 10.1086/431925

Radiative signatures of plasmoid-dominated reconnection in blazar jets
journal, October 2018

  • Christie, I. M.; Petropoulou, M.; Sironi, L.
  • Monthly Notices of the Royal Astronomical Society, Vol. 482, Issue 1
  • DOI: 10.1093/mnras/sty2636

Long-term optical variability of PKS 2155-304
journal, June 2011

The Calibration of the Swift UVOT Optical Observations: A Recipe for Photometry
journal, January 2006

  • Li, Weidong; Jha, Saurabh; Filippenko, Alexei V.
  • Publications of the Astronomical Society of the Pacific, Vol. 118, Issue 839
  • DOI: 10.1086/498356

Study of the variable broadband emission of Markarian 501 during the most extreme Swift X-ray activity
journal, May 2020

Calibration and performance of the photon sensor response of FACT — the first G-APD Cherenkov telescope
journal, October 2014

Unprecedented study of the broadband emission of Mrk 421 during flaring activity in March 2010
journal, May 2015

The 0.1-100 keV spectrum and variability of Mrk 421 in a high state
journal, February 2000

Host galaxy subtraction of TeV candidate BL Lacertae objects
journal, September 2007

On characterizing the variability properties of X-ray light curves from active galaxies
journal, November 2003

Fast TeV variability from misaligned minijets in the jet of M87
journal, March 2010

  • Giannios, Dimitrios; Uzdensky, Dmitri A.; Begelman, Mitchell C.
  • Monthly Notices of the Royal Astronomical Society, Vol. 402, Issue 3
  • DOI: 10.1111/j.1365-2966.2009.16045.x

INTEGRAL observations of the blazar Mrk 421 in outburst: Results of a multi-wavelength campaign
journal, April 2008

Fifteen years monitoring of extragalactic radio sources at 22, 37 and 87 GHz
journal, November 1998

  • Teräsranta, H.; Tornikoski, M.; Mujunen, A.
  • Astronomy and Astrophysics Supplement Series, Vol. 132, Issue 3
  • DOI: 10.1051/aas:1998297

Measuring Reddening with Sloan Digital sky Survey Stellar Spectra and Recalibrating sfd
journal, August 2011

Log-parabolic spectra and particle acceleration in blazars: II. The BeppoSAX wide band X-ray spectra of Mkn 501
journal, July 2004

Compton Dominance and the Blazar Sequence
journal, January 2013

THE SWIFT /BAT HARD X-RAY TRANSIENT MONITOR
journal, October 2013

  • Krimm, H. A.; Holland, S. T.; Corbet, R. H. D.
  • The Astrophysical Journal Supplement Series, Vol. 209, Issue 1
  • DOI: 10.1088/0067-0049/209/1/14

THE SPECTRAL ENERGY DISTRIBUTION OF FERMI BRIGHT BLAZARS
journal, May 2010

Long-term optical monitoring of TeV emitting blazars: I. Data analysis⋆
journal, December 2018

Fermi Large Area Telescope Fourth Source Catalog
journal, March 2020

  • Abdollahi, S.; Acero, F.; Ackermann, M.
  • The Astrophysical Journal Supplement Series, Vol. 247, Issue 1
  • DOI: 10.3847/1538-4365/ab6bcb

Correlated Multi–Wave Band Variability in the Blazar 3C 279 from 1996 to 2007
journal, December 2008

  • Chatterjee, Ritaban; Jorstad, Svetlana G.; Marscher, Alan P.
  • The Astrophysical Journal, Vol. 689, Issue 1
  • DOI: 10.1086/592598

Interplasmoid Compton scattering and the Compton dominance of BL Lacs
journal, December 2019

  • Christie, I. M.; Petropoulou, M.; Sironi, L.
  • Monthly Notices of the Royal Astronomical Society, Vol. 492, Issue 1
  • DOI: 10.1093/mnras/stz3265

Unified Schemes for Radio-Loud Active Galactic Nuclei
journal, June 1995

  • Urry, C. Megan; Padovani, Paolo
  • Publications of the Astronomical Society of the Pacific, Vol. 107
  • DOI: 10.1086/133630

The Swift Ultra-Violet/Optical Telescope
journal, October 2005

  • Roming, Peter W. A.; Kennedy, Thomas E.; Mason, Keith O.
  • Space Science Reviews, Vol. 120, Issue 3-4
  • DOI: 10.1007/s11214-005-5095-4

A flat-spectrum flare in S4 0444+63 revealed by a new implementation of multiwavelength single-dish observations
journal, January 2020

  • Giroletti, M.; Righini, S.
  • Monthly Notices of the Royal Astronomical Society, Vol. 492, Issue 2
  • DOI: 10.1093/mnras/staa042

SWIFT observations of TeV BL Lacertae objects
journal, February 2007

On the magnetization of BL Lac jets
journal, December 2015

  • Tavecchio, F.; Ghisellini, G.
  • Monthly Notices of the Royal Astronomical Society, Vol. 456, Issue 3
  • DOI: 10.1093/mnras/stv2790

Stochastic Acceleration and the Evolution of Spectral Distributions in Synchro-Self-Compton Sources: a Self-Consistent Modeling of Blazars’ Flares
journal, September 2011

Particle acceleration in the vacuum gaps in black hole magnetospheres
journal, August 2016

On the Momentum Diffusion of Radiating Ultrarelativistic Electrons in a Turbulent Magnetic Field
journal, July 2008

  • Stawarz, Łukasz; Petrosian, Vahe
  • The Astrophysical Journal, Vol. 681, Issue 2
  • DOI: 10.1086/588813

Probing an X-Ray Flare Pattern in Mrk 421 Induced by Multiple Stationary Shocks: A Solution to the Bulk Lorentz Factor Crisis
journal, May 2019

  • Hervet, Olivier; Williams, David A.; Falcone, Abraham D.
  • The Astrophysical Journal, Vol. 877, Issue 1
  • DOI: 10.3847/1538-4357/ab1906

Blazar flares powered by plasmoids in relativistic reconnection
journal, July 2016

  • Petropoulou, Maria; Giannios, Dimitrios; Sironi, Lorenzo
  • Monthly Notices of the Royal Astronomical Society, Vol. 462, Issue 3
  • DOI: 10.1093/mnras/stw1832

Electron-beam interaction with emission-line clouds in blazars
journal, February 2021

Numerical simulations of radiation from blazar jets
journal, August 2003

Synchrotron Self‐Compton Analysis of TeV X‐Ray‐Selected BL Lacertae Objects
journal, October 2008

  • Finke, Justin D.; Dermer, Charles D.; Böttcher, Markus
  • The Astrophysical Journal, Vol. 686, Issue 1
  • DOI: 10.1086/590900

A combined radio and GeV γ-ray view of the 2012 and 2013 flares of Mrk 421
journal, March 2015

  • Hovatta, T.; Petropoulou, M.; Richards, J. L.
  • Monthly Notices of the Royal Astronomical Society, Vol. 448, Issue 4
  • DOI: 10.1093/mnras/stv220

The Likelihood Analysis of EGRET Data
journal, April 1996

  • Mattox, J. R.; Bertsch, D. L.; Chiang, J.
  • The Astrophysical Journal, Vol. 461
  • DOI: 10.1086/177068

Reconnection-driven plasmoids in blazars: fast flares on a slow envelope
journal, February 2013

  • Giannios, Dimitrios
  • Monthly Notices of the Royal Astronomical Society, Vol. 431, Issue 1
  • DOI: 10.1093/mnras/stt167

Correlation between the TeV and X-ray emission in high-energy peaked BL Lac objects
journal, March 2005

X‐Ray Observations of BL Lacertae during the 1997 Outburst and Association with Quasar‐like Characteristics
journal, August 1999

  • Madejski, Greg M.; Sikora, Marek; Jaffe, Tess
  • The Astrophysical Journal, Vol. 521, Issue 1
  • DOI: 10.1086/307524

Design and operation of FACT – the first G-APD Cherenkov telescope
journal, June 2013

The Fermi blazar sequence
journal, April 2017

  • Ghisellini, G.; Righi, C.; Costamante, L.
  • Monthly Notices of the Royal Astronomical Society, Vol. 469, Issue 1
  • DOI: 10.1093/mnras/stx806

A method for the estimation of the significance of cross-correlations in unevenly sampled red-noise time series
journal, September 2014

  • Max-Moerbeck, W.; Richards, J. L.; Hovatta, T.
  • Monthly Notices of the Royal Astronomical Society, Vol. 445, Issue 1
  • DOI: 10.1093/mnras/stu1707

On the correlation between the X-ray and gamma-ray emission in TeV blazars
journal, February 2010

Mrk 421 active state in 2008: the MAGIC view, simultaneous multi-wavelength observations and SSC model constrained
journal, June 2012

Progress in unveiling extreme particle acceleration in persistent astrophysical jets
journal, January 2020

An intermittent extreme BL Lac: MWL study of 1ES 2344+514 in an enhanced state
journal, June 2020

  • Acciari, MAGIC Collaboration: V. A.; Ansoldi, S.; Antonelli, L. A.
  • Monthly Notices of the Royal Astronomical Society, Vol. 496, Issue 3
  • DOI: 10.1093/mnras/staa1702

WEBT and XMM-Newton observations of 3C 454.3 during the post-outburst phase: Detection of the little and big blue bumps
journal, August 2007

Fractional Variability—A Tool to Study Blazar Variability
journal, May 2019

Measuring the broad-band power spectra of active galactic nuclei with RXTE
journal, May 2002

Correlated Long-Term Optical and X-Ray Variations in NGC 5548
journal, February 2003

  • Uttley, Philip; Edelson, Rick; McHardy, Ian M.
  • The Astrophysical Journal, Vol. 584, Issue 2
  • DOI: 10.1086/373887

THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION
journal, May 2009

[ITAL]BeppoSAX[/ITAL] Observations of Unprecedented Synchrotron Activity in the BL Lacertae Object Markarian 501
journal, January 1998

  • Pian, Elena; Vacanti, Giuseppe; Tagliaferri, Gianpiero
  • The Astrophysical Journal, Vol. 492, Issue 1
  • DOI: 10.1086/311083

Extremely rapid bursts of TeV photons from the active galaxy Markarian 421
journal, September 1996

  • Gaidos, J. A.; Akerlof, C. W.; Biller, S.
  • Nature, Vol. 383, Issue 6598
  • DOI: 10.1038/383319a0

Multiwavelength observations of Mrk 501 in 2008
journal, December 2014

Evolution of the Synchrotron Spectrum in Markarian 421 during the 1998 Campaign
journal, February 2004

  • Tanihata, Chiharu; Kataoka, Jun; Takahashi, Tadayuki
  • The Astrophysical Journal, Vol. 601, Issue 2
  • DOI: 10.1086/380779

The 2009 multiwavelength campaign on Mrk 421: Variability and correlation studies
journal, April 2015

A hadronic origin for ultra-high-frequency-peaked BL Lac objects
journal, February 2015

  • Cerruti, M.; Zech, A.; Boisson, C.
  • Monthly Notices of the Royal Astronomical Society, Vol. 448, Issue 1
  • DOI: 10.1093/mnras/stu2691

Very Long Baseline polarimetry and the γ -ray connection in Markarian 421 during the broadband campaign in 2011
journal, November 2014

CALIBRATION OF THE NuSTAR HIGH-ENERGY FOCUSING X-RAY TELESCOPE
journal, September 2015

  • Madsen, Kristin K.; Harrison, Fiona A.; Markwardt, Craig B.
  • The Astrophysical Journal Supplement Series, Vol. 220, Issue 1
  • DOI: 10.1088/0067-0049/220/1/8

Relativistic jets shine through shocks or magnetic reconnection?
journal, April 2015

  • Sironi, Lorenzo; Petropoulou, Maria; Giannios, Dimitrios
  • Monthly Notices of the Royal Astronomical Society, Vol. 450, Issue 1
  • DOI: 10.1093/mnras/stv641

Unveiling the X-ray/TeV engine in Mkn 421
journal, November 2006

Rapid X‐Ray Variability of the BL Lacertae Object PKS 2155−304
journal, December 1999

  • Zhang, Y. H.; Celotti, A.; Treves, A.
  • The Astrophysical Journal, Vol. 527, Issue 2
  • DOI: 10.1086/308116

Multiwavelength Observations of Markarian 421 in 2001 March: An Unprecedented View on the X‐Ray/TeV Correlated Variability
journal, April 2008

  • Fossati, G.; Buckley, J. H.; Bond, I. H.
  • The Astrophysical Journal, Vol. 677, Issue 2
  • DOI: 10.1086/527311

Multiwavelength Observations of Strong Flares from the TeV Blazar 1ES 1959+650
journal, January 2004

  • Krawczynski, H.; Hughes, S. B.; Horan, D.
  • The Astrophysical Journal, Vol. 601, Issue 1
  • DOI: 10.1086/380393

Time-Dependent Models for Blazar Emission with the Second-Order Fermi Acceleration
journal, December 2013

  • Asano, Katsuaki; Takahara, Fumio; Kusunose, Masaaki
  • The Astrophysical Journal, Vol. 780, Issue 1
  • DOI: 10.1088/0004-637X/780/1/64

A proton synchrotron blazar model for flaring in Markarian 501
journal, March 2001

Multiband variability studies and novel broadband SED modeling of Mrk 501 in 2009
journal, July 2017

A Sample of Low‐Redshift BL Lacertae Objects. II. EVN and MERLIN Data and Multiwavelength Analysis
journal, August 2006

  • Giroletti, M.; Giovannini, G.; Taylor, G. B.
  • The Astrophysical Journal, Vol. 646, Issue 2
  • DOI: 10.1086/504971

Performance of the MAGIC telescopes under moonlight
journal, September 2017

The GASP-WEBT monitoring of 3C 454.3 during the 2008 optical-to-radio and γ-ray outburst
journal, August 2009

Unraveling the Complex Behavior of Mrk 421 with Simultaneous X-Ray and VHE Observations during an Extreme Flaring Activity in 2013 April
journal, June 2020

  • Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.
  • The Astrophysical Journal Supplement Series, Vol. 248, Issue 2
  • DOI: 10.3847/1538-4365/ab89b5

BLAZARS IN THE FERMI ERA: THE OVRO 40 m TELESCOPE MONITORING PROGRAM
journal, May 2011

  • Richards, Joseph L.; Max-Moerbeck, Walter; Pavlidou, Vasiliki
  • The Astrophysical Journal Supplement Series, Vol. 194, Issue 2
  • DOI: 10.1088/0067-0049/194/2/29

THE FERMI LARGE AREA TELESCOPE ON ORBIT: EVENT CLASSIFICATION, INSTRUMENT RESPONSE FUNCTIONS, AND CALIBRATION
journal, October 2012

  • Ackermann, M.; Ajello, M.; Albert, A.
  • The Astrophysical Journal Supplement Series, Vol. 203, Issue 1
  • DOI: 10.1088/0067-0049/203/1/4

IACHEC CROSS-CALIBRATION OF CHANDRA , NuSTAR , SWIFT , SUZAKU , XMM-NEWTON WITH 3C 273 AND PKS 2155-304
journal, December 2016

  • Madsen, Kristin K.; Beardmore, Andrew P.; Forster, Karl
  • The Astronomical Journal, Vol. 153, Issue 1
  • DOI: 10.3847/1538-3881/153/1/2

Superorbital variability of X-ray and radio emission of Cyg X-1 - II. Dependence of the orbital modulation and spectral hardness on the superorbital phase
journal, September 2008

  • Poutanen, Juri; Zdziarski, Andrzej A.; Ibragimov, Askar
  • Monthly Notices of the Royal Astronomical Society, Vol. 389, Issue 3
  • DOI: 10.1111/j.1365-2966.2008.13666.x

Multifrequency monitoring of the blazar 0716+714 during the GASP-WEBT-AGILE campaign of 2007
journal, February 2008

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