Standard
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, Chi-Yung; 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.
в:
Astronomy and Astrophysics, Том 689, A119, 01.09.2024.
Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Harvard
Kouch, PM, Liodakis, I, Middei, R, Kim, DE, Tavecchio, F, Marscher, AP, Marshall, HL, Ehlert, SR, Di Gesu, L
, Jorstad, SG, Agudo, I, Madejski, GM, Romani, RW, Errando, M, Lindfors, E, Nilsson, K, Toppari, E, Potter, SB, Imazawa, R, Sasada, M, Fukazawa, Y, Kawabata, KS, Uemura, M, Mizuno, T, Nakaoka, T, Akitaya, H, McCall, C, Jermak, HE, Steele, IA, Myserlis, I, Gurwell, M, Keating, GK, Rao, R, Kang, S, Lee, S-S, Kim, S-H, Cheong, WY, Jeong, H-W, Angelakis, E, Kraus, A, Aceituno, FJ, Bonnoli, G, Casanova, V, Escudero, J, Agís-González, B, Husillos, C, Morcuende, D, Otero-Santos, J, Sota, A, Bachev, R, Antonelli, LA, Bachetti, M, Baldini, L, Baumgartner, WH, Bellazzini, R, Bianchi, S, Bongiorno, SD, Bonino, R, Brez, A, Bucciantini, N, Capitanio, F, Castellano, S, Cavazzuti, E, Chen, C-T, Ciprini, S, Costa, E, De Rosa, A, Del Monte, E, Di Lalla, N, Di Marco, A, Donnarumma, I, Doroshenko, V, Dovčiak, M, Enoto, T, Evangelista, Y, Fabiani, S, Ferrazzoli, R, Garcia, JA, Gunji, S, Hayashida, K, Heyl, J, Iwakiri, W, Kaaret, P, Karas, V, Kislat, F, Kitaguchi, T, Kolodziejczak, JJ, Krawczynski, H, La Monaca, F, Latronico, L, Maldera, S, Manfreda, A, Marin, F, Marinucci, A, Massaro, F, Matt, G, Mitsuishi, I, Muleri, F, Negro, M, Ng, C-Y, O'Dell, SL, Omodei, N, Oppedisano, C, Papitto, A, Pavlov, GG, Peirson, AL, Perri, M, Pesce-Rollins, M, Petrucci, P-O, Pilia, M, Possenti, A, Poutanen, J, Puccetti, S, Ramsey, BD, Rankin, J, Ratheesh, A, Roberts, OJ, Sgrò, C, Slane, P, Soffitta, P, Spandre, G, Swartz, DA, Tamagawa, T, Taverna, R, Tawara, Y, Tennant, AF, Thomas, NE, Tombesi, F, Trois, A, Tsygankov, SS, Turolla, R, Vink, J, Weisskopf, MC, Wu, K, Xie, F & Zane, S 2024, '
IXPE observation of PKS 2155–304 reveals the most highly polarized blazar',
Astronomy and Astrophysics, Том. 689, A119.
https://doi.org/10.1051/0004-6361/202449166APA
Kouch, P. M., Liodakis, I., Middei, R., Kim, D. E., Tavecchio, F., Marscher, A. P., Marshall, H. L., Ehlert, S. R., Di Gesu, L.
, Jorstad, S. G., Agudo, I., Madejski, G. M., Romani, R. W., Errando, M., Lindfors, E., Nilsson, K., Toppari, E., Potter, S. B., Imazawa, R., ... Zane, S. (2024).
IXPE observation of PKS 2155–304 reveals the most highly polarized blazar.
Astronomy and Astrophysics,
689, [A119].
https://doi.org/10.1051/0004-6361/202449166Vancouver
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, Chi-Yung ; 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. /
IXPE observation of PKS 2155–304 reveals the most highly polarized blazar. в:
Astronomy and Astrophysics. 2024 ; Том 689.
BibTeX
@article{817e8d50be5f4dbf8fe43e91c6eeb884,
title = "IXPE observation of PKS 2155–304 reveals the most highly polarized blazar",
abstract = "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 (T1) of the IXPE pointing, the source exhibited the highest X-ray polarization degree detected for an HSP blazar thus far, (30.7 ± 2.0)%; this dropped to (15.3 ± 2.1)% during the second half (T2). The X-ray polarization angle remained stable during the IXPE pointing at 129.4° ±1.8° and 125.4° ±3.9° during T1 and T2, respectively. Meanwhile, the optical polarization degree remained stable during the IXPE pointing, with average host-galaxy-corrected values of (4.3 ± 0.7)% and (3.8 ± 0.9)% during the T1 and T2, respectively. During the IXPE pointing, the optical polarization angle changed achromatically from ∼140° to ∼90° and back to ∼130°. Despite several attempts, we only detected (99.7% conf.) the radio polarization once (during T2, at 225.5 GHz): with degree (1.7 ± 0.4)% and angle 112.5° ±5.5°. 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 (∼135°), similarly to all of the MW polarization angles. Moreover, the X-ray-to-optical polarization degree ratios of ∼7 and ∼4 during T1 and T2, 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.",
keywords = "magnetic fields, polarization, relativistic processes, BL Lacertae objects: individual: HSP, galaxies: jets, Astrophysics - High Energy Astrophysical Phenomena",
author = "Kouch, {Pouya M.} and Ioannis Liodakis and Riccardo Middei and Kim, {Dawoon E.} and Fabrizio Tavecchio and Marscher, {Alan P.} and Marshall, {Herman L.} and Ehlert, {Steven R.} and {Di Gesu}, Laura and Jorstad, {Svetlana G.} and Iv{\'a}n Agudo and Madejski, {Grzegorz M.} and Romani, {Roger W.} and Manel Errando and Elina Lindfors and Kari Nilsson and Ella Toppari and Potter, {Stephen B.} and Ryo Imazawa and Mahito Sasada and Yasushi Fukazawa and Kawabata, {Koji S.} and Makoto Uemura and Tsunefumi Mizuno and Tatsuya Nakaoka and Hiroshi Akitaya and Callum McCall and Jermak, {Helen E.} and Steele, {Iain A.} and Ioannis Myserlis and Mark Gurwell and Keating, {Garrett K.} and Ramprasad Rao and Sincheol Kang and Sang-Sung Lee and Sang-Hyun Kim and Cheong, {Whee Yeon} and Hyeon-Woo Jeong and Emmanouil Angelakis and Alexander Kraus and Aceituno, {Francisco Jos{\'e}} and Giacomo Bonnoli and V{\'i}ctor Casanova and Juan Escudero and Beatriz Ag{\'i}s-Gonz{\'a}lez and C{\'e}sar Husillos and Daniel Morcuende and Jorge Otero-Santos and Alfredo Sota and Rumen Bachev and Antonelli, {Lucio Angelo} and Matteo Bachetti and Luca Baldini and Baumgartner, {Wayne H.} and Ronaldo Bellazzini and Stefano Bianchi and Bongiorno, {Stephen D.} and Raffaella Bonino and Alessandro Brez and Niccol{\`o} Bucciantini and Fiamma Capitanio and Simone Castellano and Elisabetta Cavazzuti and Chien-Ting Chen and Stefano Ciprini and Enrico Costa and {De Rosa}, Alessandra and {Del Monte}, Ettore and {Di Lalla}, Niccol{\`o} and {Di Marco}, Alessandro and Immacolata Donnarumma and Victor Doroshenko and Michal Dov{\v c}iak and Teruaki Enoto and Yuri Evangelista and Sergio Fabiani and Riccardo Ferrazzoli and Garcia, {Javier A.} and Shuichi Gunji and Kiyoshi Hayashida and Jeremy Heyl and Wataru Iwakiri and Philip Kaaret and Vladimir Karas and Fabian Kislat and Takao Kitaguchi and Kolodziejczak, {Jeffery J.} and Henric Krawczynski and {La Monaca}, Fabio and Luca Latronico and Simone Maldera and Alberto Manfreda and Fr{\'e}d{\'e}ric Marin and Andrea Marinucci and Francesco Massaro and Giorgio Matt and Ikuyuki Mitsuishi and Fabio Muleri and Michela Negro and Chi-Yung Ng and O'Dell, {Stephen L.} and Nicola Omodei and Chiara Oppedisano and Alessandro Papitto and Pavlov, {George G.} and Peirson, {Abel Lawrence} and Matteo Perri and Melissa Pesce-Rollins and Pierre-Olivier Petrucci and Maura Pilia and Andrea Possenti and Juri Poutanen and Simonetta Puccetti and Ramsey, {Brian D.} and John Rankin and Ajay Ratheesh and Roberts, {Oliver J.} and Carmelo Sgr{\`o} and Patrick Slane and Paolo Soffitta and Gloria Spandre and Swartz, {Douglas A.} and Toru Tamagawa and Roberto Taverna and Yuzuru Tawara and Tennant, {Allyn F.} and Thomas, {Nicholas E.} and Francesco Tombesi and Alessio Trois and Tsygankov, {Sergey S.} and Roberto Turolla and Jacco Vink and Weisskopf, {Martin C.} and Kinwah Wu and Fei Xie and Silvia Zane",
year = "2024",
month = sep,
day = "1",
doi = "10.1051/0004-6361/202449166",
language = "English",
volume = "689",
journal = "ASTRONOMY & ASTROPHYSICS",
issn = "0004-6361",
publisher = "EDP Sciences",
}
RIS
TY - JOUR
T1 - IXPE observation of PKS 2155–304 reveals the most highly polarized blazar
AU - Kouch, Pouya M.
AU - Liodakis, Ioannis
AU - Middei, Riccardo
AU - Kim, Dawoon E.
AU - Tavecchio, Fabrizio
AU - Marscher, Alan P.
AU - Marshall, Herman L.
AU - Ehlert, Steven R.
AU - Di Gesu, Laura
AU - Jorstad, Svetlana G.
AU - Agudo, Iván
AU - Madejski, Grzegorz M.
AU - Romani, Roger W.
AU - Errando, Manel
AU - Lindfors, Elina
AU - Nilsson, Kari
AU - Toppari, Ella
AU - Potter, Stephen B.
AU - Imazawa, Ryo
AU - Sasada, Mahito
AU - Fukazawa, Yasushi
AU - Kawabata, Koji S.
AU - Uemura, Makoto
AU - Mizuno, Tsunefumi
AU - Nakaoka, Tatsuya
AU - Akitaya, Hiroshi
AU - McCall, Callum
AU - Jermak, Helen E.
AU - Steele, Iain A.
AU - Myserlis, Ioannis
AU - Gurwell, Mark
AU - Keating, Garrett K.
AU - Rao, Ramprasad
AU - Kang, Sincheol
AU - Lee, Sang-Sung
AU - Kim, Sang-Hyun
AU - Cheong, Whee Yeon
AU - Jeong, Hyeon-Woo
AU - Angelakis, Emmanouil
AU - Kraus, Alexander
AU - Aceituno, Francisco José
AU - Bonnoli, Giacomo
AU - Casanova, Víctor
AU - Escudero, Juan
AU - Agís-González, Beatriz
AU - Husillos, César
AU - Morcuende, Daniel
AU - Otero-Santos, Jorge
AU - Sota, Alfredo
AU - Bachev, Rumen
AU - Antonelli, Lucio Angelo
AU - Bachetti, Matteo
AU - Baldini, Luca
AU - Baumgartner, Wayne H.
AU - Bellazzini, Ronaldo
AU - Bianchi, Stefano
AU - Bongiorno, Stephen D.
AU - Bonino, Raffaella
AU - Brez, Alessandro
AU - Bucciantini, Niccolò
AU - Capitanio, Fiamma
AU - Castellano, Simone
AU - Cavazzuti, Elisabetta
AU - Chen, Chien-Ting
AU - Ciprini, Stefano
AU - Costa, Enrico
AU - De Rosa, Alessandra
AU - Del Monte, Ettore
AU - Di Lalla, Niccolò
AU - Di Marco, Alessandro
AU - Donnarumma, Immacolata
AU - Doroshenko, Victor
AU - Dovčiak, Michal
AU - Enoto, Teruaki
AU - Evangelista, Yuri
AU - Fabiani, Sergio
AU - Ferrazzoli, Riccardo
AU - Garcia, Javier A.
AU - Gunji, Shuichi
AU - Hayashida, Kiyoshi
AU - Heyl, Jeremy
AU - Iwakiri, Wataru
AU - Kaaret, Philip
AU - Karas, Vladimir
AU - Kislat, Fabian
AU - Kitaguchi, Takao
AU - Kolodziejczak, Jeffery J.
AU - Krawczynski, Henric
AU - La Monaca, Fabio
AU - Latronico, Luca
AU - Maldera, Simone
AU - Manfreda, Alberto
AU - Marin, Frédéric
AU - Marinucci, Andrea
AU - Massaro, Francesco
AU - Matt, Giorgio
AU - Mitsuishi, Ikuyuki
AU - Muleri, Fabio
AU - Negro, Michela
AU - Ng, Chi-Yung
AU - O'Dell, Stephen L.
AU - Omodei, Nicola
AU - Oppedisano, Chiara
AU - Papitto, Alessandro
AU - Pavlov, George G.
AU - Peirson, Abel Lawrence
AU - Perri, Matteo
AU - Pesce-Rollins, Melissa
AU - Petrucci, Pierre-Olivier
AU - Pilia, Maura
AU - Possenti, Andrea
AU - Poutanen, Juri
AU - Puccetti, Simonetta
AU - Ramsey, Brian D.
AU - Rankin, John
AU - Ratheesh, Ajay
AU - Roberts, Oliver J.
AU - Sgrò, Carmelo
AU - Slane, Patrick
AU - Soffitta, Paolo
AU - Spandre, Gloria
AU - Swartz, Douglas A.
AU - Tamagawa, Toru
AU - Taverna, Roberto
AU - Tawara, Yuzuru
AU - Tennant, Allyn F.
AU - Thomas, Nicholas E.
AU - Tombesi, Francesco
AU - Trois, Alessio
AU - Tsygankov, Sergey S.
AU - Turolla, Roberto
AU - Vink, Jacco
AU - Weisskopf, Martin C.
AU - Wu, Kinwah
AU - Xie, Fei
AU - Zane, Silvia
PY - 2024/9/1
Y1 - 2024/9/1
N2 - 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 (T1) of the IXPE pointing, the source exhibited the highest X-ray polarization degree detected for an HSP blazar thus far, (30.7 ± 2.0)%; this dropped to (15.3 ± 2.1)% during the second half (T2). The X-ray polarization angle remained stable during the IXPE pointing at 129.4° ±1.8° and 125.4° ±3.9° during T1 and T2, respectively. Meanwhile, the optical polarization degree remained stable during the IXPE pointing, with average host-galaxy-corrected values of (4.3 ± 0.7)% and (3.8 ± 0.9)% during the T1 and T2, respectively. During the IXPE pointing, the optical polarization angle changed achromatically from ∼140° to ∼90° and back to ∼130°. Despite several attempts, we only detected (99.7% conf.) the radio polarization once (during T2, at 225.5 GHz): with degree (1.7 ± 0.4)% and angle 112.5° ±5.5°. 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 (∼135°), similarly to all of the MW polarization angles. Moreover, the X-ray-to-optical polarization degree ratios of ∼7 and ∼4 during T1 and T2, 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.
AB - 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 (T1) of the IXPE pointing, the source exhibited the highest X-ray polarization degree detected for an HSP blazar thus far, (30.7 ± 2.0)%; this dropped to (15.3 ± 2.1)% during the second half (T2). The X-ray polarization angle remained stable during the IXPE pointing at 129.4° ±1.8° and 125.4° ±3.9° during T1 and T2, respectively. Meanwhile, the optical polarization degree remained stable during the IXPE pointing, with average host-galaxy-corrected values of (4.3 ± 0.7)% and (3.8 ± 0.9)% during the T1 and T2, respectively. During the IXPE pointing, the optical polarization angle changed achromatically from ∼140° to ∼90° and back to ∼130°. Despite several attempts, we only detected (99.7% conf.) the radio polarization once (during T2, at 225.5 GHz): with degree (1.7 ± 0.4)% and angle 112.5° ±5.5°. 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 (∼135°), similarly to all of the MW polarization angles. Moreover, the X-ray-to-optical polarization degree ratios of ∼7 and ∼4 during T1 and T2, 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.
KW - magnetic fields
KW - polarization
KW - relativistic processes
KW - BL Lacertae objects: individual: HSP
KW - galaxies: jets
KW - Astrophysics - High Energy Astrophysical Phenomena
U2 - 10.1051/0004-6361/202449166
DO - 10.1051/0004-6361/202449166
M3 - Article
VL - 689
JO - ASTRONOMY & ASTROPHYSICS
JF - ASTRONOMY & ASTROPHYSICS
SN - 0004-6361
M1 - A119
ER -
