Search Menu
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information
Search Scholarly Publications

Title: Multifrequency studies of the peculiar quasar 4C + 21.35 during the 2010 flaring activity

Abstract

The discovery of rapidly variable Very High Energy (VHE; E > 100 GeV) γ-ray emission from 4C +21.35 (PKS 1222+216) by MAGIC on 2010 June 17, triggered by the high activity detected by the Fermi Large Area Telescope (LAT) in high energy (HE; E > 100 MeV) γ-rays, poses intriguing questions on the location of the γ-ray emitting region in this flat spectrum radio quasar. Here, we present multifrequency data of 4C +21.35 collected from centimeter to VHE during 2010 to investigate the properties of this source and discuss a possible emission model. Additionally, the first hint of detection at VHE was observed by MAGIC on 2010 May 3, soon after a γ-ray flare detected by Fermi-LAT that peaked on April 29. The same emission mechanism may therefore be responsible for both the HE and VHE emission during the 2010 flaring episodes. Two optical peaks were detected on 2010 April 20 and June 30, close in time but not simultaneous with the two γ-ray peaks, while no clear connection was observed between the X-ray and γ-ray emission. Furthermore, an increasing flux density was observed in radio and mm bands from the beginning of 2009, in accordance with the increasing γ-raymore » activity observed by Fermi-LAT, and peaking on 2011 January 27 in the mm regime (230 GHz). We also model the spectral energy distributions (SEDs) of 4C +21.35 for the two periods of the VHE detection and a quiescent state, using a one-zone model with the emission coming from a very compact region outside the broad line region. The three SEDs can be fit with a combination of synchrotron self-Compton and external Compton emission of seed photons from a dust torus, changing only the electron distribution parameters between the epochs. The fit of the optical/UV part of the spectrum for 2010 April 29 seems to favor an inner disk radius of« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ORCiD logo; ; ORCiD logo; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ORCiD logo; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ORCiD logo; ; ; ; ; ; ; ORCiD logo; ; ; ; ; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org.:
USDOE; MEXT; JAXA; K.A. Wallenberg Foundation; Swedish Research Council (SRC); CPAN; Academy of Finland; German Research Foundation (DFG); MNiSzW; National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); Ministry of Economic Affairs and Digital Transformation of Spain (MINECO); RFBR; Shota Rustaveli National Science Foundation; Generalitat Valenciana
Contributing Org.:
Fermi LAT Collaboration; the MAGIC Collaboration
OSTI Identifier:
1356524
Grant/Contract Number:  
AC02-76SF00515; 745/N-HESS-MAGIC/2010/0; 11-Fermi11-0019; NNX08AW31G; NNX11A043G; AST-0808050; AST-1109911; NNX08AW56G; NNX09AU10G; NNX12AO93G; 12-02-00452; 12-02-3119; 127740
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal
Additional Journal Information:
Journal Volume: 786; Journal Issue: 2; Journal ID: ISSN 0004-637X
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; galaxies: active; gamma rays: general; quasars: general; quasars: individual (4C+21.35); radiation mechanisms: non-thermal

Citation Formats

Ackermann, M., Ajello, M., Allafort, A., Antolini, E., Barbiellini, G., Bastieri, D., Bellazzini, R., Bissaldi, E., Bonamente, E., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cavazzuti, E., Cecchi, C., Chaves, R. G., Chekhtman, A., Chiang, J., Chiaro, G., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cutini, S., D'Ammando, F., de Palma, F., Dermer, C. D., do Couto e Silva, E., Donato, D., Drell, P. S., Favuzzi, C., Finke, J., Focke, W. B., Franckowiak, A., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Giglietto, N., Giordano, F., Giroletti, M., Godfrey, G., Grenier, I. A., Guiriec, S., Hayashida, M., Hewitt, J. W., Horan, D., Hughes, R. E., Iafrate, G., Johnson, A. S., Knödlseder, J., Kuss, M., Lande, J., Larsson, S., Latronico, L., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mayer, M., Mazziotta, M. N., McEnery, J. E., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nemmen, R., Nuss, E., Ohsugi, T., Orienti, M., Orlando, E., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Porter, T. A., Rainò, S., Razzano, M., Reimer, A., Reimer, O., Sanchez, D. A., Schulz, A., Sgrò, C., Siskind, E. J., Spandre, G., Spinelli, P., Stawarz, Ł., Takahashi, H., Takahashi, T., Thayer, J. G., Thayer, J. B., Thompson, D. J., Tinivella, M., Torres, D. F., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Werner, M., Winer, B. L., Wood, D. L., Wood, K. S., Aleksić, J., Ansoldi, S., Antonelli, L. A., Antoranz, P., Babic, A., Bangale, P., de Almeida, U. Barres, Barrio, J. A., González, J. Becerra, Bednarek, W., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carmona, E., Carosi, A., Carreto Fidalgo, D., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., 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., Einecke, S., Eisenacher, D., Elsaesser, D., Farina, E., Ferenc, D., Fonseca, M. V., Font, L., Frantzen, K., Fruck, C., García López, R. J., Garczarczyk, M., Garrido Terrats, D., Gaug, M., Giavitto, G., Godinović, N., González Muñoz, A., Gozzini, S. R., Hadasch, D., Herrero, A., Hildebrand, D., Hose, J., Hrupec, D., Idec, W., Kadenius, V., Kellermann, H., Knoetig, M. L., Kodani, K., Konno, Y., Krause, J., Kubo, H., Kushida, J., La Barbera, A., Lelas, D., 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., Mazin, D., Menzel, U., Meucci, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Munar-Adrover, P., Nakajima, D., Niedzwiecki, A., Nishijima, K., Nilsson, K., Nowak, N., Orito, R., Overkemping, A., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Paredes-Fortuny, X., Partini, S., Persic, M., Prada, F., Prada Moroni, P. G., Prandini, E., Preziuso, S., Puljak, I., Reinthal, R., Rhode, W., Ribó, M., Rico, J., Garcia, J. Rodriguez, Rügamer, S., Saggion, A., Saito, T., Saito, K., Salvati, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shore, S. N., Sillanpää, A., Sitarek, J., Snidaric, I., Sobczynska, D., Spanier, F., Stamatescu, V., Stamerra, A., Steinbring, T., Storz, J., Sun, S., Surić, T., Takalo, L., Takami, H., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Thaele, J., Tibolla, O., Toyama, T., Treves, A., Vogler, P., Wagner, R. M., Zandanel, F., Zanin, R., Aller, M. F., Angelakis, E., Blinov, D. A., Djorgovski, S. G., Drake, A. J., Efimova, N. V., Gurwell, M. A., Homan, D. C., Jordan, B., Kopatskaya, E. N., Kovalev, Y. Y., Kurtanidze, O. M., Lähteenmäki, A., Larionov, V. M., Lister, M. L., Nieppola, E., Nikolashvili, M. G., Ros, E., Savolainen, T., Sigua, L. A., and Tornikoski, M. Multifrequency studies of the peculiar quasar 4C + 21.35 during the 2010 flaring activity. United States: N. p., 2014. Web. doi:10.1088/0004-637x/786/2/157.
Copy to clipboard
Ackermann, M., Ajello, M., Allafort, A., Antolini, E., Barbiellini, G., Bastieri, D., Bellazzini, R., Bissaldi, E., Bonamente, E., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cavazzuti, E., Cecchi, C., Chaves, R. G., Chekhtman, A., Chiang, J., Chiaro, G., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cutini, S., D'Ammando, F., de Palma, F., Dermer, C. D., do Couto e Silva, E., Donato, D., Drell, P. S., Favuzzi, C., Finke, J., Focke, W. B., Franckowiak, A., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Giglietto, N., Giordano, F., Giroletti, M., Godfrey, G., Grenier, I. A., Guiriec, S., Hayashida, M., Hewitt, J. W., Horan, D., Hughes, R. E., Iafrate, G., Johnson, A. S., Knödlseder, J., Kuss, M., Lande, J., Larsson, S., Latronico, L., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mayer, M., Mazziotta, M. N., McEnery, J. E., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nemmen, R., Nuss, E., Ohsugi, T., Orienti, M., Orlando, E., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Porter, T. A., Rainò, S., Razzano, M., Reimer, A., Reimer, O., Sanchez, D. A., Schulz, A., Sgrò, C., Siskind, E. J., Spandre, G., Spinelli, P., Stawarz, Ł., Takahashi, H., Takahashi, T., Thayer, J. G., Thayer, J. B., Thompson, D. J., Tinivella, M., Torres, D. F., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Werner, M., Winer, B. L., Wood, D. L., Wood, K. S., Aleksić, J., Ansoldi, S., Antonelli, L. A., Antoranz, P., Babic, A., Bangale, P., de Almeida, U. Barres, Barrio, J. A., González, J. Becerra, Bednarek, W., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carmona, E., Carosi, A., Carreto Fidalgo, D., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., 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., Einecke, S., Eisenacher, D., Elsaesser, D., Farina, E., Ferenc, D., Fonseca, M. V., Font, L., Frantzen, K., Fruck, C., García López, R. J., Garczarczyk, M., Garrido Terrats, D., Gaug, M., Giavitto, G., Godinović, N., González Muñoz, A., Gozzini, S. R., Hadasch, D., Herrero, A., Hildebrand, D., Hose, J., Hrupec, D., Idec, W., Kadenius, V., Kellermann, H., Knoetig, M. L., Kodani, K., Konno, Y., Krause, J., Kubo, H., Kushida, J., La Barbera, A., Lelas, D., 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., Mazin, D., Menzel, U., Meucci, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Munar-Adrover, P., Nakajima, D., Niedzwiecki, A., Nishijima, K., Nilsson, K., Nowak, N., Orito, R., Overkemping, A., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Paredes-Fortuny, X., Partini, S., Persic, M., Prada, F., Prada Moroni, P. G., Prandini, E., Preziuso, S., Puljak, I., Reinthal, R., Rhode, W., Ribó, M., Rico, J., Garcia, J. Rodriguez, Rügamer, S., Saggion, A., Saito, T., Saito, K., Salvati, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shore, S. N., Sillanpää, A., Sitarek, J., Snidaric, I., Sobczynska, D., Spanier, F., Stamatescu, V., Stamerra, A., Steinbring, T., Storz, J., Sun, S., Surić, T., Takalo, L., Takami, H., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Thaele, J., Tibolla, O., Toyama, T., Treves, A., Vogler, P., Wagner, R. M., Zandanel, F., Zanin, R., Aller, M. F., Angelakis, E., Blinov, D. A., Djorgovski, S. G., Drake, A. J., Efimova, N. V., Gurwell, M. A., Homan, D. C., Jordan, B., Kopatskaya, E. N., Kovalev, Y. Y., Kurtanidze, O. M., Lähteenmäki, A., Larionov, V. M., Lister, M. L., Nieppola, E., Nikolashvili, M. G., Ros, E., Savolainen, T., Sigua, L. A., & Tornikoski, M. Multifrequency studies of the peculiar quasar 4C + 21.35 during the 2010 flaring activity. United States. https://doi.org/10.1088/0004-637x/786/2/157
Copy to clipboard
Ackermann, M., Ajello, M., Allafort, A., Antolini, E., Barbiellini, G., Bastieri, D., Bellazzini, R., Bissaldi, E., Bonamente, E., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cavazzuti, E., Cecchi, C., Chaves, R. G., Chekhtman, A., Chiang, J., Chiaro, G., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cutini, S., D'Ammando, F., de Palma, F., Dermer, C. D., do Couto e Silva, E., Donato, D., Drell, P. S., Favuzzi, C., Finke, J., Focke, W. B., Franckowiak, A., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Giglietto, N., Giordano, F., Giroletti, M., Godfrey, G., Grenier, I. A., Guiriec, S., Hayashida, M., Hewitt, J. W., Horan, D., Hughes, R. E., Iafrate, G., Johnson, A. S., Knödlseder, J., Kuss, M., Lande, J., Larsson, S., Latronico, L., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mayer, M., Mazziotta, M. N., McEnery, J. E., Michelson, P. F., Mizuno, T., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nemmen, R., Nuss, E., Ohsugi, T., Orienti, M., Orlando, E., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Porter, T. A., Rainò, S., Razzano, M., Reimer, A., Reimer, O., Sanchez, D. A., Schulz, A., Sgrò, C., Siskind, E. J., Spandre, G., Spinelli, P., Stawarz, Ł., Takahashi, H., Takahashi, T., Thayer, J. G., Thayer, J. B., Thompson, D. J., Tinivella, M., Torres, D. F., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Werner, M., Winer, B. L., Wood, D. L., Wood, K. S., Aleksić, J., Ansoldi, S., Antonelli, L. A., Antoranz, P., Babic, A., Bangale, P., de Almeida, U. Barres, Barrio, J. A., González, J. Becerra, Bednarek, W., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carmona, E., Carosi, A., Carreto Fidalgo, D., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., 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., Einecke, S., Eisenacher, D., Elsaesser, D., Farina, E., Ferenc, D., Fonseca, M. V., Font, L., Frantzen, K., Fruck, C., García López, R. J., Garczarczyk, M., Garrido Terrats, D., Gaug, M., Giavitto, G., Godinović, N., González Muñoz, A., Gozzini, S. R., Hadasch, D., Herrero, A., Hildebrand, D., Hose, J., Hrupec, D., Idec, W., Kadenius, V., Kellermann, H., Knoetig, M. L., Kodani, K., Konno, Y., Krause, J., Kubo, H., Kushida, J., La Barbera, A., Lelas, D., 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., Mazin, D., Menzel, U., Meucci, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Munar-Adrover, P., Nakajima, D., Niedzwiecki, A., Nishijima, K., Nilsson, K., Nowak, N., Orito, R., Overkemping, A., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Paredes-Fortuny, X., Partini, S., Persic, M., Prada, F., Prada Moroni, P. G., Prandini, E., Preziuso, S., Puljak, I., Reinthal, R., Rhode, W., Ribó, M., Rico, J., Garcia, J. Rodriguez, Rügamer, S., Saggion, A., Saito, T., Saito, K., Salvati, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shore, S. N., Sillanpää, A., Sitarek, J., Snidaric, I., Sobczynska, D., Spanier, F., Stamatescu, V., Stamerra, A., Steinbring, T., Storz, J., Sun, S., Surić, T., Takalo, L., Takami, H., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Thaele, J., Tibolla, O., Toyama, T., Treves, A., Vogler, P., Wagner, R. M., Zandanel, F., Zanin, R., Aller, M. F., Angelakis, E., Blinov, D. A., Djorgovski, S. G., Drake, A. J., Efimova, N. V., Gurwell, M. A., Homan, D. C., Jordan, B., Kopatskaya, E. N., Kovalev, Y. Y., Kurtanidze, O. M., Lähteenmäki, A., Larionov, V. M., Lister, M. L., Nieppola, E., Nikolashvili, M. G., Ros, E., Savolainen, T., Sigua, L. A., and Tornikoski, M. Fri . "Multifrequency studies of the peculiar quasar 4C + 21.35 during the 2010 flaring activity". United States. https://doi.org/10.1088/0004-637x/786/2/157. https://www.osti.gov/servlets/purl/1356524.
Copy to clipboard
@article{osti_1356524,
title = {Multifrequency studies of the peculiar quasar 4C + 21.35 during the 2010 flaring activity},
author = {Ackermann, M. and Ajello, M. and Allafort, A. and Antolini, E. and Barbiellini, G. and Bastieri, D. and Bellazzini, R. and Bissaldi, E. and Bonamente, E. and Bregeon, J. and Brigida, M. and Bruel, P. and Buehler, R. and Buson, S. and Caliandro, G. A. and Cameron, R. A. and Caraveo, P. A. and Cavazzuti, E. and Cecchi, C. and Chaves, R. G. and Chekhtman, A. and Chiang, J. and Chiaro, G. and Ciprini, S. and Claus, R. and Cohen-Tanugi, J. and Conrad, J. and Cutini, S. and D'Ammando, F. and de Palma, F. and Dermer, C. D. and do Couto e Silva, E. and Donato, D. and Drell, P. S. and Favuzzi, C. and Finke, J. and Focke, W. B. and Franckowiak, A. and Fukazawa, Y. and Fusco, P. and Gargano, F. and Gasparrini, D. and Gehrels, N. and Giglietto, N. and Giordano, F. and Giroletti, M. and Godfrey, G. and Grenier, I. A. and Guiriec, S. and Hayashida, M. and Hewitt, J. W. and Horan, D. and Hughes, R. E. and Iafrate, G. and Johnson, A. S. and Knödlseder, J. and Kuss, M. and Lande, J. and Larsson, S. and Latronico, L. and Longo, F. and Loparco, F. and Lovellette, M. N. and Lubrano, P. and Mayer, M. and Mazziotta, M. N. and McEnery, J. E. and Michelson, P. F. and Mizuno, T. and Monzani, M. E. and Morselli, A. and Moskalenko, I. V. and Murgia, S. and Nemmen, R. and Nuss, E. and Ohsugi, T. and Orienti, M. and Orlando, E. and Perkins, J. S. and Pesce-Rollins, M. and Piron, F. and Pivato, G. and Porter, T. A. and Rainò, S. and Razzano, M. and Reimer, A. and Reimer, O. and Sanchez, D. A. and Schulz, A. and Sgrò, C. and Siskind, E. J. and Spandre, G. and Spinelli, P. and Stawarz, Ł. and Takahashi, H. and Takahashi, T. and Thayer, J. G. and Thayer, J. B. and Thompson, D. J. and Tinivella, M. and Torres, D. F. and Tosti, G. and Troja, E. and Usher, T. L. and Vandenbroucke, J. and Vasileiou, V. and Vianello, G. and Vitale, V. and Werner, M. and Winer, B. L. and Wood, D. L. and Wood, K. S. and Aleksić, J. and Ansoldi, S. and Antonelli, L. A. and Antoranz, P. and Babic, A. and Bangale, P. and de Almeida, U. Barres and Barrio, J. A. and González, J. Becerra and Bednarek, W. and Berger, K. and Bernardini, E. and Biland, A. and Blanch, O. and Bock, R. K. and Bonnefoy, S. and Bonnoli, G. and Borracci, F. and Bretz, T. and Carmona, E. and Carosi, A. and Carreto Fidalgo, D. and Colin, P. and Colombo, E. and Contreras, J. L. and Cortina, J. and Covino, S. and Da Vela, P. and Dazzi, F. and De Angelis, A. and De Caneva, G. and De Lotto, B. and Delgado Mendez, C. and Doert, M. and Domínguez, A. and Dominis Prester, D. and Dorner, D. and Doro, M. and Einecke, S. and Eisenacher, D. and Elsaesser, D. and Farina, E. and Ferenc, D. and Fonseca, M. V. and Font, L. and Frantzen, K. and Fruck, C. and García López, R. J. and Garczarczyk, M. and Garrido Terrats, D. and Gaug, M. and Giavitto, G. and Godinović, N. and González Muñoz, A. and Gozzini, S. R. and Hadasch, D. and Herrero, A. and Hildebrand, D. and Hose, J. and Hrupec, D. and Idec, W. and Kadenius, V. and Kellermann, H. and Knoetig, M. L. and Kodani, K. and Konno, Y. and Krause, J. and Kubo, H. and Kushida, J. and La Barbera, A. and Lelas, D. and Lewandowska, N. and Lindfors, E. and Lombardi, S. and López, M. and López-Coto, R. and López-Oramas, A. and Lorenz, E. and Lozano, I. and Makariev, M. and Mallot, K. and Maneva, G. and Mankuzhiyil, N. and Mannheim, K. and Maraschi, L. and Marcote, B. and Mariotti, M. and Martínez, M. and Mazin, D. and Menzel, U. and Meucci, M. and Miranda, J. M. and Mirzoyan, R. and Moralejo, A. and Munar-Adrover, P. and Nakajima, D. and Niedzwiecki, A. and Nishijima, K. and Nilsson, K. and Nowak, N. and Orito, R. and Overkemping, A. and Paiano, S. and Palatiello, M. and Paneque, D. and Paoletti, R. and Paredes, J. M. and Paredes-Fortuny, X. and Partini, S. and Persic, M. and Prada, F. and Prada Moroni, P. G. and Prandini, E. and Preziuso, S. and Puljak, I. and Reinthal, R. and Rhode, W. and Ribó, M. and Rico, J. and Garcia, J. Rodriguez and Rügamer, S. and Saggion, A. and Saito, T. and Saito, K. and Salvati, M. and Satalecka, K. and Scalzotto, V. and Scapin, V. and Schultz, C. and Schweizer, T. and Shore, S. N. and Sillanpää, A. and Sitarek, J. and Snidaric, I. and Sobczynska, D. and Spanier, F. and Stamatescu, V. and Stamerra, A. and Steinbring, T. and Storz, J. and Sun, S. and Surić, T. and Takalo, L. and Takami, H. and Tavecchio, F. and Temnikov, P. and Terzić, T. and Tescaro, D. and Teshima, M. and Thaele, J. and Tibolla, O. and Toyama, T. and Treves, A. and Vogler, P. and Wagner, R. M. and Zandanel, F. and Zanin, R. and Aller, M. F. and Angelakis, E. and Blinov, D. A. and Djorgovski, S. G. and Drake, A. J. and Efimova, N. V. and Gurwell, M. A. and Homan, D. C. and Jordan, B. and Kopatskaya, E. N. and Kovalev, Y. Y. and Kurtanidze, O. M. and Lähteenmäki, A. and Larionov, V. M. and Lister, M. L. and Nieppola, E. and Nikolashvili, M. G. and Ros, E. and Savolainen, T. and Sigua, L. A. and Tornikoski, M.},
abstractNote = {The discovery of rapidly variable Very High Energy (VHE; E > 100 GeV) γ-ray emission from 4C +21.35 (PKS 1222+216) by MAGIC on 2010 June 17, triggered by the high activity detected by the Fermi Large Area Telescope (LAT) in high energy (HE; E > 100 MeV) γ-rays, poses intriguing questions on the location of the γ-ray emitting region in this flat spectrum radio quasar. Here, we present multifrequency data of 4C +21.35 collected from centimeter to VHE during 2010 to investigate the properties of this source and discuss a possible emission model. Additionally, the first hint of detection at VHE was observed by MAGIC on 2010 May 3, soon after a γ-ray flare detected by Fermi-LAT that peaked on April 29. The same emission mechanism may therefore be responsible for both the HE and VHE emission during the 2010 flaring episodes. Two optical peaks were detected on 2010 April 20 and June 30, close in time but not simultaneous with the two γ-ray peaks, while no clear connection was observed between the X-ray and γ-ray emission. Furthermore, an increasing flux density was observed in radio and mm bands from the beginning of 2009, in accordance with the increasing γ-ray activity observed by Fermi-LAT, and peaking on 2011 January 27 in the mm regime (230 GHz). We also model the spectral energy distributions (SEDs) of 4C +21.35 for the two periods of the VHE detection and a quiescent state, using a one-zone model with the emission coming from a very compact region outside the broad line region. The three SEDs can be fit with a combination of synchrotron self-Compton and external Compton emission of seed photons from a dust torus, changing only the electron distribution parameters between the epochs. The fit of the optical/UV part of the spectrum for 2010 April 29 seems to favor an inner disk radius of},
doi = {10.1088/0004-637x/786/2/157},
journal = {The Astrophysical Journal},
number = 2,
volume = 786,
place = {United States},
year = {Fri Apr 25 00:00:00 EDT 2014},
month = {Fri Apr 25 00:00:00 EDT 2014}
}
Copy to clipboard
Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1088/0004-637x/786/2/157
Copyright Statement
Other availability
Search WorldCat Search WorldCat to find libraries that may hold this journal
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

Works referenced in this record:

Gamma-Ray Studies of Blazars: Synchro-Compton Analysis of flat Spectrum Radio Quasars
journal, February 2009

An Optical-Near-Infrared Outburst with no Accompanying γ-Rays in the Blazar pks 0208–512
journal, December 2012

Parsec‐Scale Blazar Monitoring: Proper Motions
journal, March 2001

  • Homan, Daniel C.; Ojha, Roopesh; Wardle, John F. C.
  • The Astrophysical Journal, Vol. 549, Issue 2
  • DOI: 10.1086/319466

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

SExtractor: Software for source extraction
journal, June 1996

  • Bertin, E.; Arnouts, S.
  • Astronomy and Astrophysics Supplement Series, Vol. 117, Issue 2
  • DOI: 10.1051/aas:1996164

Emission from hot dust in the Infrared Spectra of Gamma-Ray Bright Blazars
journal, April 2011

  • Malmrose, Michael P.; Marscher, Alan P.; Jorstad, Svetlana G.
  • The Astrophysical Journal, Vol. 732, Issue 2
  • DOI: 10.1088/0004-637X/732/2/116

FERMI LARGE AREA TELESCOPE DETECTION OF BRIGHT γ-RAY OUTBURSTS FROM THE PECULIAR QUASAR 4C +21.35
journal, April 2011

Variable Gamma-Ray Emission Induced by Ultra-High Energy Neutral Beams: Application to 4c +21.35
journal, August 2012

A Test of External Compton Models for Gamma‐Ray Active Galactic Nuclei
journal, July 2006

  • Fan, Zhonghui; Cao, Xinwu; Gu, Minfeng
  • The Astrophysical Journal, Vol. 646, Issue 1
  • DOI: 10.1086/504864

The evolution of radio-loud active galactic nuclei as a function of black hole spin: Evolution of radio-loud AGN
journal, May 2010

Mojave: Monitoring of jets in Active Galactic Nuclei with vlba Experiments. v. Multi-Epoch vlba Images
journal, February 2009

Very-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?
journal, June 2008

An X‐Ray Reprocessing Model of Disk Thermal Emission in Type 1 Seyfert Galaxies
journal, June 2002

  • Chiang, James
  • The Astrophysical Journal, Vol. 572, Issue 1
  • DOI: 10.1086/340193

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

An Exceptional Very High Energy Gamma-Ray Flare of PKS 2155-304
journal, July 2007

  • Aharonian, F.; Akhperjanian, A. G.; Bazer-Bachi, A. R.
  • The Astrophysical Journal, Vol. 664, Issue 2
  • DOI: 10.1086/520635

THE 70 MONTH SWIFT -BAT ALL-SKY HARD X-RAY SURVEY
journal, July 2013

  • Baumgartner, W. H.; Tueller, J.; Markwardt, C. B.
  • The Astrophysical Journal Supplement Series, Vol. 207, Issue 2
  • DOI: 10.1088/0067-0049/207/2/19

Optical nuclei of radio-loud AGN and the Fanaroff-Riley divide
journal, September 2004

Mojave. x. Parsec-Scale jet Orientation Variations and Superluminal Motion in Active Galactic Nuclei
journal, October 2013

Variation of the γγ opacity by the He ii Lyman continuum constrains the location of the γ-ray emission region in the blazar 3C 454.3: γ-ray emission of 3C 454.3
journal, August 2011

Disk Winds and Disk Emission Lines
journal, January 1997

  • Murray, N.; Chiang, J.
  • The Astrophysical Journal, Vol. 474, Issue 1
  • DOI: 10.1086/303443

Radiative properties of reconnection-powered minijets in blazars: Radiative properties of minijets
journal, February 2011

  • Nalewajko, Krzysztof; Giannios, Dimitrios; Begelman, Mitchell C.
  • Monthly Notices of the Royal Astronomical Society, Vol. 413, Issue 1
  • DOI: 10.1111/j.1365-2966.2010.18140.x

Spectroscopy of Broad-Line Blazars from 1lac
journal, March 2012

Reverberation Mapping and the Disk-Wind Model of the Broad-Line Region
journal, August 1996

  • Chiang, J.; Murray, N.
  • The Astrophysical Journal, Vol. 466
  • DOI: 10.1086/177543

On the origin of the γ -ray emission from the flaring blazar PKS 1222+216
journal, October 2011

A Catalog of Quasar Properties from Sloan Digital sky Survey data Release 7
journal, June 2011

  • Shen, Yue; Richards, Gordon T.; Strauss, Michael A.
  • The Astrophysical Journal Supplement Series, Vol. 194, Issue 2
  • DOI: 10.1088/0067-0049/194/2/45

Simultaneous Radio to (Sub-) mm-Monitoring of Variability and Spectral Shape Evolution of potential GLAST Blazars
conference, January 2007

  • Fuhrmann, L.; Zensus, J. A.; Krichbaum, T. P.
  • THE FIRST GLAST SYMPOSIUM, AIP Conference Proceedings
  • DOI: 10.1063/1.2757314

The inner jet of an active galactic nucleus as revealed by a radio-to-γ-ray outburst
journal, April 2008

  • Marscher, Alan P.; Jorstad, Svetlana G.; D’Arcangelo, Francesca D.
  • Nature, Vol. 452, Issue 7190
  • DOI: 10.1038/nature06895

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

Constraining Emission Models of Luminous Blazar Sources
journal, September 2009

Multitemperature Blackbody Spectrum of a Thin Accretion Disk around a Kerr Black Hole: Model Computations and Comparison with Observations
journal, April 2005

  • Li, Li‐Xin; Zimmerman, Erik R.; Narayan, Ramesh
  • The Astrophysical Journal Supplement Series, Vol. 157, Issue 2
  • DOI: 10.1086/428089

Comments on cross-correlation methodology in variability studies of active galactic nuclei
journal, July 1994

  • White, Russell J.; Peterson, Bradley M.
  • Publications of the Astronomical Society of the Pacific, Vol. 106
  • DOI: 10.1086/133456

Estimating Black Hole Masses in Active Galaxies Using the Hα Emission Line
journal, September 2005

  • Greene, Jenny E.; Ho, Luis C.
  • The Astrophysical Journal, Vol. 630, Issue 1
  • DOI: 10.1086/431897

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

The Connection between Jets, Accretion Disks, and Black Hole Mass in Blazars
journal, October 2004

  • Wang, Jian-Min; Luo, Bin; Ho, Luis C.
  • The Astrophysical Journal, Vol. 615, Issue 1
  • DOI: 10.1086/426060

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

Relativistic jets as X-ray and gamma-ray sources
journal, February 1981

GeV BREAKS IN BLAZARS AS A RESULT OF GAMMA-RAY ABSORPTION WITHIN THE BROAD-LINE REGION
journal, June 2010

H.E.S.S. discovery of VHE γ -rays from the quasar PKS 1510−089
journal, June 2013

The Burst Alert Telescope (BAT) on the SWIFT Midex Mission
journal, October 2005

  • Barthelmy, Scott D.; Barbier, Louis M.; Cummings, Jay R.
  • Space Science Reviews, Vol. 120, Issue 3-4
  • DOI: 10.1007/s11214-005-5096-3

Radio and γ-ray follow-up of the exceptionally high-activity state of PKS 1510−089 in 2011
journal, November 2012

  • Orienti, M.; Koyama, S.; D'Ammando, F.
  • Monthly Notices of the Royal Astronomical Society, Vol. 428, Issue 3
  • DOI: 10.1093/mnras/sts201

The optical spectrum of PKS 1222+216 and its black hole mass: The optical properties of PKS 1222+216
journal, June 2012

Reverberation Measurements for 17 Quasars and the Size‐Mass‐Luminosity Relations in Active Galactic Nuclei
journal, April 2000

  • Kaspi, Shai; Smith, Paul S.; Netzer, Hagai
  • The Astrophysical Journal, Vol. 533, Issue 2
  • DOI: 10.1086/308704

Energetic constraints on a rapid gamma-ray flare in PKS 1222+216: Energetics of a VHE flare in PKS 1222+216
journal, August 2012

  • Nalewajko, Krzysztof; Begelman, Mitchell C.; Cerutti, Benoît
  • Monthly Notices of the Royal Astronomical Society, Vol. 425, Issue 4
  • DOI: 10.1111/j.1365-2966.2012.21721.x

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

Electromagnetic extraction of energy from Kerr black holes
journal, July 1977

  • Blandford, R. D.; Znajek, R. L.
  • Monthly Notices of the Royal Astronomical Society, Vol. 179, Issue 3
  • DOI: 10.1093/mnras/179.3.433

First Results from the Catalina Real-Time Transient Survey
journal, April 2009

THE FIRST FERMI -LAT CATALOG OF SOURCES ABOVE 10 GeV
journal, November 2013

  • Ackermann, M.; Ajello, M.; Allafort, A.
  • The Astrophysical Journal Supplement Series, Vol. 209, Issue 2
  • DOI: 10.1088/0067-0049/209/2/34

Optical spectra of narrow emission line Palomar-Green galaxies
journal, December 1987

  • Osterbrock, Donald E.; Pogge, Richard W.
  • The Astrophysical Journal, Vol. 323
  • DOI: 10.1086/165810

AGN Dusty Tori. II. Observational Implications of Clumpiness
journal, September 2008

  • Nenkova, Maia; Sirocky, Matthew M.; Nikutta, Robert
  • The Astrophysical Journal, Vol. 685, Issue 1
  • DOI: 10.1086/590483

Magic Discovery of very high Energy Emission from the fsrq pks 1222+21
journal, February 2011

FLARE-LIKE VARIABILITY OF THE Mg II λ2800 EMISSION LINE IN THE γ-RAY BLAZAR 3C 454.3
journal, January 2013

  • León-Tavares, J.; Chavushyan, V.; Patiño-Álvarez, V.
  • The Astrophysical Journal, Vol. 763, Issue 2
  • DOI: 10.1088/2041-8205/763/2/L36

Analysis methods for results in gamma-ray astronomy
journal, September 1983

  • Li, T. -P.; Ma, Y. -Q.
  • The Astrophysical Journal, Vol. 272
  • DOI: 10.1086/161295

THE FIRST FERMI MULTIFREQUENCY CAMPAIGN ON BL LACERTAE: CHARACTERIZING THE LOW-ACTIVITY STATE OF THE EPONYMOUS BLAZAR
journal, March 2011

Rapid variability in TeV blazars: the case of PKS 2155−304
journal, May 2008

The Swift Gamma‐Ray Burst Mission
journal, August 2004

  • Gehrels, N.; Chincarini, G.; Giommi, P.
  • The Astrophysical Journal, Vol. 611, Issue 2
  • DOI: 10.1086/422091

A theoretical unifying scheme for gamma-ray bright blazars
journal, December 1998

Fast TeV variability in blazars: jets in a jet
journal, May 2009

  • Giannios, Dimitrios; Uzdensky, Dmitri A.; Begelman, Mitchell C.
  • Monthly Notices of the Royal Astronomical Society: Letters, Vol. 395, Issue 1
  • DOI: 10.1111/j.1745-3933.2009.00635.x

Parameter estimation in astronomy through application of the likelihood ratio
journal, March 1979

Black-hole mass estimates for a homogeneous sample of bright flat-spectrum radio quasars
journal, December 2013

Long-term monitoring of PKS 0537−441 with Fermi–LAT and multiwavelength observations
journal, March 2013

  • D’Ammando, F.; Antolini, E.; Tosti, G.
  • Monthly Notices of the Royal Astronomical Society, Vol. 431, Issue 3
  • DOI: 10.1093/mnras/stt344

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

Accretion Disk Winds from Active Galactic Nuclei
journal, October 1995

  • Murray, N.; Chiang, J.; Grossman, S. A.
  • The Astrophysical Journal, Vol. 451
  • DOI: 10.1086/176238

1222+216 - A wide-angle-tailed quasar?
journal, May 1993

  • Saikia, D. J.; Witta, Paul J.; Muxlow, T. W. B.
  • The Astronomical Journal, Vol. 105
  • DOI: 10.1086/116544

On Pair Content and Variability of Subparsec Jets in Quasars
journal, May 2000

  • Sikora, M.; Madejski, G.
  • The Astrophysical Journal, Vol. 534, Issue 1
  • DOI: 10.1086/308756

Variable Very High Energy γ‐Ray Emission from Markarian 501
journal, November 2007

  • Albert, J.; Aliu, E.; Anderhub, H.
  • The Astrophysical Journal, Vol. 669, Issue 2
  • DOI: 10.1086/521382

Probing the Inner jet of the Quasar pks 1510–089 with Multi-Waveband Monitoring During Strong Gamma-Ray Activity
journal, February 2010

  • Marscher, Alan P.; Jorstad, Svetlana G.; Larionov, Valeri M.
  • The Astrophysical Journal, Vol. 710, Issue 2
  • DOI: 10.1088/2041-8205/710/2/L126

Performance of the MAGIC stereo system obtained with Crab Nebula data
journal, February 2012

Multiepoch Very Long Baseline Array Observations of EGRET‐detected Quasars and BL Lacertae Objects: Superluminal Motion of Gamma‐Ray Bright Blazars
journal, June 2001

  • Jorstad, Svetlana G.; Marscher, Alan P.; Mattox, John R.
  • The Astrophysical Journal Supplement Series, Vol. 134, Issue 2
  • DOI: 10.1086/320858

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

Evidence for an axion-like particle from PKS 1222 + 216 ?
journal, October 2012

MOJAVE: Monitoring of Jets in Active Galactic Nuclei with VLBA Experiments. III. Deep VLA Images at 1.4 GHz
journal, August 2007

  • Cooper, N. J.; Lister, M. L.; Kochanczyk, M. D.
  • The Astrophysical Journal Supplement Series, Vol. 171, Issue 2
  • DOI: 10.1086/518654
    Sort by:
    [ × clear filter / sort ]

    Works referencing / citing this record:

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

    The large gamma-ray flare of the flat-spectrum radio quasar PKS 0346−27
    journal, July 2019

    Jet kinematics of the quasar 4C+21.35 from observations with the KaVA very long baseline interferometry array
    journal, April 2019

    • Lee, Taeseok; Trippe, Sascha; Kino, Motoki
    • Monthly Notices of the Royal Astronomical Society, Vol. 486, Issue 2
    • DOI: 10.1093/mnras/stz970

    Kinematics of Parsec-scale Jets of Gamma-Ray Blazars at 43 GHz within the VLBA-BU-BLAZAR Program
    journal, September 2017

    • Jorstad, Svetlana G.; Marscher, Alan P.; Morozova, Daria A.
    • The Astrophysical Journal, Vol. 846, Issue 2
    • DOI: 10.3847/1538-4357/aa8407

    Blazar Sheath Illumination of the Outer Molecular Torus: A Resolution of the Seed Photon Problem for the Far-GeV Blazar Flares
    journal, January 2018

    • Breiding, Peter; Georganopoulos, Markos; Meyer, Eileen T.
    • The Astrophysical Journal, Vol. 853, Issue 1
    • DOI: 10.3847/1538-4357/aaa1ee

    Relativistic Jets in Active Galactic Nuclei and Microquasars
    journal, January 2017

      Sort by:
      [ × clear filter / sort ]

      Similar Records in DOE PAGES and OSTI.GOV collections: