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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Accesso online: | https://arxiv.org/abs/2406.01693 |
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| author | Kouch, Pouya M. Liodakis, Ioannis Middei, Riccardo Kim, Dawoon E. Tavecchio, Fabrizio Marscher, Alan P. Marshall, Herman L. Ehlert, Steven R. Di Gesu, Laura Jorstad, Svetlana G. Agudo, Iván Madejski, Grzegorz M. Romani, Roger W. Errando, Manel Lindfors, Elina Nilsson, Kari Toppari, Ella Potter, Stephen B. Imazawa, Ryo Sasada, Mahito Fukazawa, Yasushi Kawabata, Koji S. Uemura, Makoto Mizuno, Tsunefumi Nakaoka, Tatsuya Akitaya, Hiroshi McCall, Callum Jermak, Helen E. Steele, Iain A. Myserlis, Ioannis Gurwell, Mark Keating, Garrett K. Rao, Ramprasad Kang, Sincheol Lee, Sang-Sung Kim, Sang-Hyun Cheong, Whee Yeon Jeong, Hyeon-Woo Angelakis, Emmanouil Kraus, Alexander Aceituno, Francisco José Bonnoli, Giacomo Casanova, Víctor Escudero, Juan Agís-González, Beatriz Husillos, César Morcuende, Daniel Otero-Santos, Jorge Sota, Alfredo Bachev, Rumen Antonelli, Lucio Angelo Bachetti, Matteo Baldini, Luca Baumgartner, Wayne H. Bellazzini, Ronaldo Bianchi, Stefano Bongiorno, Stephen D. Bonino, Raffaella Brez, Alessandro Bucciantini, Niccolò Capitanio, Fiamma Castellano, Simone Cavazzuti, Elisabetta Chen, Chien-Ting Ciprini, Stefano Costa, Enrico De Rosa, Alessandra Del Monte, Ettore Di Lalla, Niccolò Di Marco, Alessandro Donnarumma, Immacolata Doroshenko, Victor Dovčiak, Michal Enoto, Teruaki Evangelista, Yuri Fabiani, Sergio Ferrazzoli, Riccardo Garcia, Javier A. Gunji, Shuichi Hayashida, Kiyoshi Heyl, Jeremy Iwakiri, Wataru Kaaret, Philip Karas, Vladimir Kislat, Fabian Kitaguchi, Takao Kolodziejczak, Jeffery J. Krawczynski, Henric La Monaca, Fabio Latronico, Luca Maldera, Simone Manfreda, Alberto Marin, Frédéric Marinucci, Andrea Massaro, Francesco Matt, Giorgio Mitsuishi, Ikuyuki Muleri, Fabio Negro, Michela Ng, C. -Y. O'Dell, Stephen L. Omodei, Nicola Oppedisano, Chiara Papitto, Alessandro Pavlov, George G. Peirson, Abel Lawrence Perri, Matteo Pesce-Rollins, Melissa Petrucci, Pierre-Olivier Pilia, Maura Possenti, Andrea Poutanen, Juri Puccetti, Simonetta Ramsey, Brian D. Rankin, John Ratheesh, Ajay Roberts, Oliver J. Sgrò, Carmelo Slane, Patrick Soffitta, Paolo Spandre, Gloria Swartz, Douglas A. Tamagawa, Toru Taverna, Roberto Tawara, Yuzuru Tennant, Allyn F. Thomas, Nicholas E. Tombesi, Francesco Trois, Alessio Tsygankov, Sergey S. Turolla, Roberto Vink, Jacco Weisskopf, Martin C. Wu, Kinwah Xie, Fei Zane, Silvia |
| author_facet | Kouch, Pouya M. Liodakis, Ioannis Middei, Riccardo Kim, Dawoon E. Tavecchio, Fabrizio Marscher, Alan P. Marshall, Herman L. Ehlert, Steven R. Di Gesu, Laura Jorstad, Svetlana G. Agudo, Iván Madejski, Grzegorz M. Romani, Roger W. Errando, Manel Lindfors, Elina Nilsson, Kari Toppari, Ella Potter, Stephen B. Imazawa, Ryo Sasada, Mahito Fukazawa, Yasushi Kawabata, Koji S. Uemura, Makoto Mizuno, Tsunefumi Nakaoka, Tatsuya Akitaya, Hiroshi McCall, Callum Jermak, Helen E. Steele, Iain A. Myserlis, Ioannis Gurwell, Mark Keating, Garrett K. Rao, Ramprasad Kang, Sincheol Lee, Sang-Sung Kim, Sang-Hyun Cheong, Whee Yeon Jeong, Hyeon-Woo Angelakis, Emmanouil Kraus, Alexander Aceituno, Francisco José Bonnoli, Giacomo Casanova, Víctor Escudero, Juan Agís-González, Beatriz Husillos, César Morcuende, Daniel Otero-Santos, Jorge Sota, Alfredo Bachev, Rumen Antonelli, Lucio Angelo Bachetti, Matteo Baldini, Luca Baumgartner, Wayne H. Bellazzini, Ronaldo Bianchi, Stefano Bongiorno, Stephen D. Bonino, Raffaella Brez, Alessandro Bucciantini, Niccolò Capitanio, Fiamma Castellano, Simone Cavazzuti, Elisabetta Chen, Chien-Ting Ciprini, Stefano Costa, Enrico De Rosa, Alessandra Del Monte, Ettore Di Lalla, Niccolò Di Marco, Alessandro Donnarumma, Immacolata Doroshenko, Victor Dovčiak, Michal Enoto, Teruaki Evangelista, Yuri Fabiani, Sergio Ferrazzoli, Riccardo Garcia, Javier A. Gunji, Shuichi Hayashida, Kiyoshi Heyl, Jeremy Iwakiri, Wataru Kaaret, Philip Karas, Vladimir Kislat, Fabian Kitaguchi, Takao Kolodziejczak, Jeffery J. Krawczynski, Henric La Monaca, Fabio Latronico, Luca Maldera, Simone Manfreda, Alberto Marin, Frédéric Marinucci, Andrea Massaro, Francesco Matt, Giorgio Mitsuishi, Ikuyuki Muleri, Fabio Negro, Michela Ng, C. -Y. O'Dell, Stephen L. Omodei, Nicola Oppedisano, Chiara Papitto, Alessandro Pavlov, George G. Peirson, Abel Lawrence Perri, Matteo Pesce-Rollins, Melissa Petrucci, Pierre-Olivier Pilia, Maura Possenti, Andrea Poutanen, Juri Puccetti, Simonetta Ramsey, Brian D. Rankin, John Ratheesh, Ajay Roberts, Oliver J. Sgrò, Carmelo Slane, Patrick Soffitta, Paolo Spandre, Gloria Swartz, Douglas A. Tamagawa, Toru Taverna, Roberto Tawara, Yuzuru Tennant, Allyn F. Thomas, Nicholas E. Tombesi, Francesco Trois, Alessio Tsygankov, Sergey S. Turolla, Roberto Vink, Jacco Weisskopf, Martin C. Wu, Kinwah Xie, Fei Zane, Silvia |
| contents | We report the X-ray polarization properties of the high-synchrotron-peaked (HSP) blazar PKS 2155$-$304 based on observations with the Imaging X-ray Polarimetry Explorer (IXPE). We observed the source between Oct 27 and Nov 7, 2023. We also conducted an extensive contemporaneous multiwavelength (MW) campaign. We find that during the first half ($T_1$) of the IXPE pointing, the source exhibited the highest X-ray polarization degree detected for an HSP blazar thus far, (30.7$\pm$2.0)%, which dropped to (15.3$\pm$2.1)% during the second half ($T_2$). The X-ray polarization angle remained stable during the IXPE pointing at 129.4$^\circ$$\pm$1.8$^\circ$ and 125.4$^\circ$$\pm$3.9$^\circ$ during $T_1$ and $T_2$, respectively. Meanwhile, the optical polarization degree remained stable during the IXPE pointing, with average host-galaxy-corrected values of (4.3$\pm$0.7)% and (3.8$\pm$0.9)% during the $T_1$ and $T_2$, respectively. During the IXPE pointing, the optical polarization angle changed achromatically from $\sim$140$^\circ$ to $\sim$90$^\circ$ and back to $\sim$130$^\circ$. Despite several attempts, we only detected (99.7% conf.) the radio polarization once (during $T_2$, at 225.5 GHz): with degree (1.7$\pm$0.4)% and angle 112.5$^\circ$$\pm$5.5$^\circ$. The direction of the broad pc-scale jet is rather ambiguous and has been found to point to the east and south at different epochs; however, on larger scales (> 1.5 pc) the jet points toward the southeast ($\sim$135$^\circ$), similar to all of the MW polarization angles. Moreover, the X-ray to optical polarization degree ratios of $\sim$7 and $\sim$4 during $T_1$ and $T_2$, respectively, are similar to previous IXPE results for several HSP blazars. These findings, combined with the lack of correlation of temporal variability between the MW polarization properties, agree with an energy-stratified shock-acceleration scenario in HSP blazars. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_01693 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | IXPE observation of PKS 2155-304 reveals the most highly polarized blazar Kouch, Pouya M. Liodakis, Ioannis Middei, Riccardo Kim, Dawoon E. Tavecchio, Fabrizio Marscher, Alan P. Marshall, Herman L. Ehlert, Steven R. Di Gesu, Laura Jorstad, Svetlana G. Agudo, Iván Madejski, Grzegorz M. Romani, Roger W. Errando, Manel Lindfors, Elina Nilsson, Kari Toppari, Ella Potter, Stephen B. Imazawa, Ryo Sasada, Mahito Fukazawa, Yasushi Kawabata, Koji S. Uemura, Makoto Mizuno, Tsunefumi Nakaoka, Tatsuya Akitaya, Hiroshi McCall, Callum Jermak, Helen E. Steele, Iain A. Myserlis, Ioannis Gurwell, Mark Keating, Garrett K. Rao, Ramprasad Kang, Sincheol Lee, Sang-Sung Kim, Sang-Hyun Cheong, Whee Yeon Jeong, Hyeon-Woo Angelakis, Emmanouil Kraus, Alexander Aceituno, Francisco José Bonnoli, Giacomo Casanova, Víctor Escudero, Juan Agís-González, Beatriz Husillos, César Morcuende, Daniel Otero-Santos, Jorge Sota, Alfredo Bachev, Rumen Antonelli, Lucio Angelo Bachetti, Matteo Baldini, Luca Baumgartner, Wayne H. Bellazzini, Ronaldo Bianchi, Stefano Bongiorno, Stephen D. Bonino, Raffaella Brez, Alessandro Bucciantini, Niccolò Capitanio, Fiamma Castellano, Simone Cavazzuti, Elisabetta Chen, Chien-Ting Ciprini, Stefano Costa, Enrico De Rosa, Alessandra Del Monte, Ettore Di Lalla, Niccolò Di Marco, Alessandro Donnarumma, Immacolata Doroshenko, Victor Dovčiak, Michal Enoto, Teruaki Evangelista, Yuri Fabiani, Sergio Ferrazzoli, Riccardo Garcia, Javier A. Gunji, Shuichi Hayashida, Kiyoshi Heyl, Jeremy Iwakiri, Wataru Kaaret, Philip Karas, Vladimir Kislat, Fabian Kitaguchi, Takao Kolodziejczak, Jeffery J. Krawczynski, Henric La Monaca, Fabio Latronico, Luca Maldera, Simone Manfreda, Alberto Marin, Frédéric Marinucci, Andrea Massaro, Francesco Matt, Giorgio Mitsuishi, Ikuyuki Muleri, Fabio Negro, Michela Ng, C. -Y. O'Dell, Stephen L. Omodei, Nicola Oppedisano, Chiara Papitto, Alessandro Pavlov, George G. Peirson, Abel Lawrence Perri, Matteo Pesce-Rollins, Melissa Petrucci, Pierre-Olivier Pilia, Maura Possenti, Andrea Poutanen, Juri Puccetti, Simonetta Ramsey, Brian D. Rankin, John Ratheesh, Ajay Roberts, Oliver J. Sgrò, Carmelo Slane, Patrick Soffitta, Paolo Spandre, Gloria Swartz, Douglas A. Tamagawa, Toru Taverna, Roberto Tawara, Yuzuru Tennant, Allyn F. Thomas, Nicholas E. Tombesi, Francesco Trois, Alessio Tsygankov, Sergey S. Turolla, Roberto Vink, Jacco Weisskopf, Martin C. Wu, Kinwah Xie, Fei Zane, Silvia High Energy Astrophysical Phenomena We report the X-ray polarization properties of the high-synchrotron-peaked (HSP) blazar PKS 2155$-$304 based on observations with the Imaging X-ray Polarimetry Explorer (IXPE). We observed the source between Oct 27 and Nov 7, 2023. We also conducted an extensive contemporaneous multiwavelength (MW) campaign. We find that during the first half ($T_1$) of the IXPE pointing, the source exhibited the highest X-ray polarization degree detected for an HSP blazar thus far, (30.7$\pm$2.0)%, which dropped to (15.3$\pm$2.1)% during the second half ($T_2$). The X-ray polarization angle remained stable during the IXPE pointing at 129.4$^\circ$$\pm$1.8$^\circ$ and 125.4$^\circ$$\pm$3.9$^\circ$ during $T_1$ and $T_2$, respectively. Meanwhile, the optical polarization degree remained stable during the IXPE pointing, with average host-galaxy-corrected values of (4.3$\pm$0.7)% and (3.8$\pm$0.9)% during the $T_1$ and $T_2$, respectively. During the IXPE pointing, the optical polarization angle changed achromatically from $\sim$140$^\circ$ to $\sim$90$^\circ$ and back to $\sim$130$^\circ$. Despite several attempts, we only detected (99.7% conf.) the radio polarization once (during $T_2$, at 225.5 GHz): with degree (1.7$\pm$0.4)% and angle 112.5$^\circ$$\pm$5.5$^\circ$. The direction of the broad pc-scale jet is rather ambiguous and has been found to point to the east and south at different epochs; however, on larger scales (> 1.5 pc) the jet points toward the southeast ($\sim$135$^\circ$), similar to all of the MW polarization angles. Moreover, the X-ray to optical polarization degree ratios of $\sim$7 and $\sim$4 during $T_1$ and $T_2$, respectively, are similar to previous IXPE results for several HSP blazars. These findings, combined with the lack of correlation of temporal variability between the MW polarization properties, agree with an energy-stratified shock-acceleration scenario in HSP blazars. |
| title | IXPE observation of PKS 2155-304 reveals the most highly polarized blazar |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2406.01693 |