IXPE and Multiwavelength Observations of Blazar PG 1553+113 Reveal an Orphan Optical Polarization Swing
The lower-energy peak of the spectral energy distribution of blazars has commonly been ascribed to synchrotron radiation from relativistic particles in the jets. Despite the consensus regarding jet emission processes, the particle acceleration mechanism is still debated. Here, we present the first X...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/2041-8213/acec3e |
| _version_ | 1797694383681699840 |
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| author | Riccardo Middei Matteo Perri Simonetta Puccetti Ioannis Liodakis Laura Di Gesu Alan P. Marscher Nicole Rodriguez Cavero Fabrizio Tavecchio Immacolata Donnarumma Marco Laurenti Svetlana G. Jorstad Iván Agudo Herman L. Marshall Luigi Pacciani Dawoon E. Kim Francisco José Aceituno Giacomo Bonnoli Víctor Casanova Beatriz Agís-González Alfredo Sota Carolina Casadio Juan Escudero Ioannis Myserlis Albrecht Sievers Pouya M. Kouch Elina Lindfors Mark Gurwell Garrett K. Keating Ramprasad Rao Sincheol Kang Sang-Sung Lee Sang-Hyun Kim Whee Yeon Cheong Hyeon-Woo Jeong Emmanouil Angelakis Alexander Kraus Lucio A. Antonelli Matteo Bachetti Luca Baldini Wayne H. Baumgartner Ronaldo Bellazzini Stefano Bianchi Stephen D. Bongiorno Raffaella Bonino Alessandro Brez Niccolò Bucciantini Fiamma Capitanio Simone Castellano Elisabetta Cavazzuti Chien-Ting Chen Stefano Ciprini Enrico Costa Alessandra De Rosa Ettore Del Monte Niccolò Di Lalla Alessandro Di Marco Victor Doroshenko Michal Dovčiak Steven R. Ehlert Teruaki Enoto Yuri Evangelista Sergio Fabiani Riccardo Ferrazzoli Javier A. García Shuichi Gunji Kiyoshi Hayashida Jeremy Heyl Wataru Iwakiri Philip Kaaret Vladimir Karas Fabian Kislat Takao Kitaguchi Jeffery J. Kolodziejczak Henric Krawczynski Fabio La Monaca Luca Latronico Simone Maldera Alberto Manfreda Frédéric Marin Andrea Marinucci Francesco Massaro Giorgio Matt Ikuyuki Mitsuishi Tsunefumi Mizuno Fabio Muleri Michela Negro Chi-Yung Ng Stephen L. O’Dell Nicola Omodei Chiara Oppedisano Alessandro Papitto George G. Pavlov Abel L. Peirson Melissa Pesce-Rollins Pierre-Olivier Petrucci Maura Pilia Andrea Possenti Juri Poutanen Brian D. Ramsey John Rankin Ajay Ratheesh Oliver J. Roberts Roger W. Romani Carmelo Sgrò Patrick Slane Paolo Soffitta Gloria Spandre Douglas A. Swartz Toru Tamagawa Roberto Taverna Yuzuru Tawara Allyn F. Tennant Nicholas E. Thomas Francesco Tombesi Alessio Trois Sergey S. Tsygankov Roberto Turolla Jacco Vink Martin C. Weisskopf Kinwah Wu Fei Xie Silvia Zane |
| author_facet | Riccardo Middei Matteo Perri Simonetta Puccetti Ioannis Liodakis Laura Di Gesu Alan P. Marscher Nicole Rodriguez Cavero Fabrizio Tavecchio Immacolata Donnarumma Marco Laurenti Svetlana G. Jorstad Iván Agudo Herman L. Marshall Luigi Pacciani Dawoon E. Kim Francisco José Aceituno Giacomo Bonnoli Víctor Casanova Beatriz Agís-González Alfredo Sota Carolina Casadio Juan Escudero Ioannis Myserlis Albrecht Sievers Pouya M. Kouch Elina Lindfors Mark Gurwell Garrett K. Keating Ramprasad Rao Sincheol Kang Sang-Sung Lee Sang-Hyun Kim Whee Yeon Cheong Hyeon-Woo Jeong Emmanouil Angelakis Alexander Kraus Lucio A. Antonelli Matteo Bachetti Luca Baldini Wayne H. Baumgartner Ronaldo Bellazzini Stefano Bianchi Stephen D. Bongiorno Raffaella Bonino Alessandro Brez Niccolò Bucciantini Fiamma Capitanio Simone Castellano Elisabetta Cavazzuti Chien-Ting Chen Stefano Ciprini Enrico Costa Alessandra De Rosa Ettore Del Monte Niccolò Di Lalla Alessandro Di Marco Victor Doroshenko Michal Dovčiak Steven R. Ehlert Teruaki Enoto Yuri Evangelista Sergio Fabiani Riccardo Ferrazzoli Javier A. García Shuichi Gunji Kiyoshi Hayashida Jeremy Heyl Wataru Iwakiri Philip Kaaret Vladimir Karas Fabian Kislat Takao Kitaguchi Jeffery J. Kolodziejczak Henric Krawczynski Fabio La Monaca Luca Latronico Simone Maldera Alberto Manfreda Frédéric Marin Andrea Marinucci Francesco Massaro Giorgio Matt Ikuyuki Mitsuishi Tsunefumi Mizuno Fabio Muleri Michela Negro Chi-Yung Ng Stephen L. O’Dell Nicola Omodei Chiara Oppedisano Alessandro Papitto George G. Pavlov Abel L. Peirson Melissa Pesce-Rollins Pierre-Olivier Petrucci Maura Pilia Andrea Possenti Juri Poutanen Brian D. Ramsey John Rankin Ajay Ratheesh Oliver J. Roberts Roger W. Romani Carmelo Sgrò Patrick Slane Paolo Soffitta Gloria Spandre Douglas A. Swartz Toru Tamagawa Roberto Taverna Yuzuru Tawara Allyn F. Tennant Nicholas E. Thomas Francesco Tombesi Alessio Trois Sergey S. Tsygankov Roberto Turolla Jacco Vink Martin C. Weisskopf Kinwah Wu Fei Xie Silvia Zane |
| author_sort | Riccardo Middei |
| collection | DOAJ |
| description | The lower-energy peak of the spectral energy distribution of blazars has commonly been ascribed to synchrotron radiation from relativistic particles in the jets. Despite the consensus regarding jet emission processes, the particle acceleration mechanism is still debated. Here, we present the first X-ray polarization observations of PG 1553+113, a high-synchrotron-peak blazar observed by the Imaging X-ray Polarimetry Explorer (IXPE). We detect an X-ray polarization degree of (10 ± 2)% along an electric-vector position angle of ψ _X = 86° ± 8°. At the same time, the radio and optical polarization degrees are lower by a factor of ∼3. During our IXPE pointing, we observed the first orphan optical polarization swing of the IXPE era, as the optical angle of PG 1553+113 underwent a smooth monotonic rotation by about 125°, with a rate of ∼17° day ^–1 . We do not find evidence of a similar rotation in either radio or X-rays, which suggests that the X-ray and optically emitting regions are separate or, at most, partially cospatial. Our spectropolarimetric results provide further evidence that the steady-state X-ray emission in blazars originates in a shock-accelerated and energy-stratified electron population. |
| first_indexed | 2024-03-12T02:57:06Z |
| format | Article |
| id | doaj.art-696b6d49eaa046fa83e14129305b503d |
| institution | Directory Open Access Journal |
| issn | 2041-8205 |
| language | English |
| last_indexed | 2024-03-12T02:57:06Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Letters |
| spelling | doaj.art-696b6d49eaa046fa83e14129305b503d2023-09-03T15:13:20ZengIOP PublishingThe Astrophysical Journal Letters2041-82052023-01-019532L2810.3847/2041-8213/acec3eIXPE and Multiwavelength Observations of Blazar PG 1553+113 Reveal an Orphan Optical Polarization SwingRiccardo Middei0https://orcid.org/0000-0001-9815-9092Matteo Perri1https://orcid.org/0000-0003-3613-4409Simonetta Puccetti2Ioannis Liodakis3https://orcid.org/0000-0001-9200-4006Laura Di Gesu4Alan P. Marscher5https://orcid.org/0000-0001-7396-3332Nicole Rodriguez Cavero6https://orcid.org/0000-0001-5256-0278Fabrizio Tavecchio7https://orcid.org/0000-0003-0256-0995Immacolata Donnarumma8https://orcid.org/0000-0002-4700-4549Marco Laurenti9https://orcid.org/0000-0001-5762-6360Svetlana G. Jorstad10https://orcid.org/0000-0001-6158-1708Iván Agudo11https://orcid.org/0000-0002-3777-6182Herman L. Marshall12https://orcid.org/0000-0002-6492-1293Luigi Pacciani13https://orcid.org/0000-0001-6897-5996Dawoon E. Kim14https://orcid.org/0000-0001-5717-3736Francisco José Aceituno15Giacomo Bonnoli16https://orcid.org/0000-0003-2464-9077Víctor Casanova17Beatriz Agís-González18https://orcid.org/0000-0001-7702-8931Alfredo Sota19Carolina Casadio20https://orcid.org/0000-0003-1117-2863Juan Escudero21https://orcid.org/0000-0002-4131-655XIoannis Myserlis22https://orcid.org/0000-0003-3025-9497Albrecht Sievers23Pouya M. Kouch24https://orcid.org/0000-0002-9328-2750Elina Lindfors25Mark Gurwell26https://orcid.org/0000-0003-0685-3621Garrett K. Keating27https://orcid.org/0000-0002-3490-146XRamprasad Rao28Sincheol Kang29https://orcid.org/0000-0002-0112-4836Sang-Sung Lee30https://orcid.org/0000-0002-6269-594XSang-Hyun Kim31https://orcid.org/0000-0001-7556-8504Whee Yeon Cheong32https://orcid.org/0009-0002-1871-5824Hyeon-Woo Jeong33https://orcid.org/0009-0005-7629-8450Emmanouil Angelakis34Alexander Kraus35https://orcid.org/0000-0002-4184-9372Lucio A. Antonelli36https://orcid.org/0000-0002-5037-9034Matteo Bachetti37https://orcid.org/0000-0002-4576-9337Luca Baldini38https://orcid.org/0000-0002-9785-7726Wayne H. Baumgartner39https://orcid.org/0000-0002-5106-0463Ronaldo Bellazzini40https://orcid.org/0000-0002-2469-7063Stefano Bianchi41https://orcid.org/0000-0002-4622-4240Stephen D. Bongiorno42https://orcid.org/0000-0002-0901-2097Raffaella Bonino43https://orcid.org/0000-0002-4264-1215Alessandro Brez44https://orcid.org/0000-0002-9460-1821Niccolò Bucciantini45https://orcid.org/0000-0002-8848-1392Fiamma Capitanio46https://orcid.org/0000-0002-6384-3027Simone Castellano47https://orcid.org/0000-0003-1111-4292Elisabetta Cavazzuti48https://orcid.org/0000-0001-7150-9638Chien-Ting Chen49https://orcid.org/0000-0002-4945-5079Stefano Ciprini50https://orcid.org/0000-0002-0712-2479Enrico Costa51https://orcid.org/0000-0003-4925-8523Alessandra De Rosa52https://orcid.org/0000-0001-5668-6863Ettore Del Monte53https://orcid.org/0000-0002-3013-6334Niccolò Di Lalla54https://orcid.org/0000-0002-7574-1298Alessandro Di Marco55https://orcid.org/0000-0003-0331-3259Victor Doroshenko56https://orcid.org/0000-0001-8162-1105Michal Dovčiak57https://orcid.org/0000-0003-0079-1239Steven R. Ehlert58https://orcid.org/0000-0003-4420-2838Teruaki Enoto59https://orcid.org/0000-0003-1244-3100Yuri Evangelista60https://orcid.org/0000-0001-6096-6710Sergio Fabiani61https://orcid.org/0000-0003-1533-0283Riccardo Ferrazzoli62https://orcid.org/0000-0003-1074-8605Javier A. García63https://orcid.org/0000-0003-3828-2448Shuichi Gunji64https://orcid.org/0000-0002-5881-2445Kiyoshi Hayashida65Jeremy Heyl66https://orcid.org/0000-0001-9739-367XWataru Iwakiri67https://orcid.org/0000-0002-0207-9010Philip Kaaret68https://orcid.org/0000-0002-3638-0637Vladimir Karas69https://orcid.org/0000-0002-5760-0459Fabian Kislat70https://orcid.org/0000-0001-7477-0380Takao Kitaguchi71Jeffery J. Kolodziejczak72https://orcid.org/0000-0002-0110-6136Henric Krawczynski73https://orcid.org/0000-0002-1084-6507Fabio La Monaca74https://orcid.org/0000-0001-8916-4156Luca Latronico75https://orcid.org/0000-0002-0984-1856Simone Maldera76https://orcid.org/0000-0002-0698-4421Alberto Manfreda77https://orcid.org/0000-0002-0998-4953Frédéric Marin78https://orcid.org/0000-0003-4952-0835Andrea Marinucci79https://orcid.org/0000-0002-2055-4946Francesco Massaro80https://orcid.org/0000-0002-1704-9850Giorgio Matt81https://orcid.org/0000-0002-2152-0916Ikuyuki Mitsuishi82Tsunefumi Mizuno83https://orcid.org/0000-0001-7263-0296Fabio Muleri84https://orcid.org/0000-0003-3331-3794Michela Negro85https://orcid.org/0000-0002-6548-5622Chi-Yung Ng86https://orcid.org/0000-0002-5847-2612Stephen L. O’Dell87https://orcid.org/0000-0002-1868-8056Nicola Omodei88https://orcid.org/0000-0002-5448-7577Chiara Oppedisano89https://orcid.org/0000-0001-6194-4601Alessandro Papitto90https://orcid.org/0000-0001-6289-7413George G. Pavlov91https://orcid.org/0000-0002-7481-5259Abel L. Peirson92https://orcid.org/0000-0001-6292-1911Melissa Pesce-Rollins93https://orcid.org/0000-0003-1790-8018Pierre-Olivier Petrucci94https://orcid.org/0000-0001-6061-3480Maura Pilia95https://orcid.org/0000-0001-7397-8091Andrea Possenti96https://orcid.org/0000-0001-5902-3731Juri Poutanen97https://orcid.org/0000-0002-0983-0049Brian D. Ramsey98https://orcid.org/0000-0003-1548-1524John Rankin99https://orcid.org/0000-0002-9774-0560Ajay Ratheesh100https://orcid.org/0000-0003-0411-4243Oliver J. Roberts101https://orcid.org/0000-0002-7150-9061Roger W. Romani102https://orcid.org/0000-0001-6711-3286Carmelo Sgrò103https://orcid.org/0000-0001-5676-6214Patrick Slane104https://orcid.org/0000-0002-6986-6756Paolo Soffitta105https://orcid.org/0000-0002-7781-4104Gloria Spandre106https://orcid.org/0000-0003-0802-3453Douglas A. Swartz107https://orcid.org/0000-0002-2954-4461Toru Tamagawa108https://orcid.org/0000-0002-8801-6263Roberto Taverna109https://orcid.org/0000-0002-1768-618XYuzuru Tawara110Allyn F. Tennant111https://orcid.org/0000-0002-9443-6774Nicholas E. Thomas112https://orcid.org/0000-0003-0411-4606Francesco Tombesi113https://orcid.org/0000-0002-6562-8654Alessio Trois114https://orcid.org/0000-0002-3180-6002Sergey S. Tsygankov115https://orcid.org/0000-0002-9679-0793Roberto Turolla116https://orcid.org/0000-0003-3977-8760Jacco Vink117https://orcid.org/0000-0002-4708-4219Martin C. Weisskopf118https://orcid.org/0000-0002-5270-4240Kinwah Wu119https://orcid.org/0000-0002-7568-8765Fei Xie120https://orcid.org/0000-0002-0105-5826Silvia Zane121https://orcid.org/0000-0001-5326-880XSpace Science Data Center , Agenzia Spaziale Italiana, Via del Politecnico snc, I-00133 Roma, Italy ; riccardo.middei@ssdc.asi.it; INAF Osservatorio Astronomico di Roma , Via Frascati 33, I-00078 Monte Porzio Catone (RM), ItalySpace Science Data Center , Agenzia Spaziale Italiana, Via del Politecnico snc, I-00133 Roma, Italy ; riccardo.middei@ssdc.asi.it; INAF Osservatorio Astronomico di Roma , Via Frascati 33, I-00078 Monte Porzio Catone (RM), ItalySpace Science Data Center , Agenzia Spaziale Italiana, Via del Politecnico snc, I-00133 Roma, Italy ; riccardo.middei@ssdc.asi.itFinnish Centre for Astronomy with ESO, University of Turku , FI-20014 Turky, FinlandASI—Agenzia Spaziale Italiana , Via del Politecnico snc, I-00133 Roma, ItalyInstitute for Astrophysical Research, Boston University , 725 Commonwealth Avenue, Boston, MA 02215, USAPhysics Department, McDonnell Center for the Space Sciences, and Center for Quantum Leaps, Washington University in St. Louis , St. Louis, MO 63130, USAINAF Osservatorio Astronomico di Brera , Via E. Bianchi 46, I-23807 Merate (LC), ItalyASI—Agenzia Spaziale Italiana , Via del Politecnico snc, I-00133 Roma, ItalyINFN—Sezione di Roma “Tor Vergata,” Via della Ricerca Scientifica 1, I-00133 Roma, Italy; Space Science Data Center , SSDC, ASI, Via del Politecnico snc, I-00133 Roma, ItalyInstitute for Astrophysical Research, Boston University , 725 Commonwealth Avenue, Boston, MA 02215, USA; Saint Petersburg State University , 7/9 Universitetskaya nab., St. Petersburg 199034 RussiaInstituto de Astrofísica de Andalucía , IAA-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainMIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USAINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, Italy; Dipartimento di Fisica, Università degli Studi di Roma “La Sapienza,” Piazzale Aldo Moro 5, I-00185 Roma, Italy; Dipartimento di Fisica, Università degli Studi di Roma “Tor Vergata,” Via della Ricerca Scientifica 1, I-00133 Roma, ItalyInstituto de Astrofísica de Andalucía , IAA-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainINAF Osservatorio Astronomico di Brera , Via E. Bianchi 46, I-23807 Merate (LC), Italy; Instituto de Astrofísica de Andalucía , IAA-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainInstituto de Astrofísica de Andalucía , IAA-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainInstituto de Astrofísica de Andalucía , IAA-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainInstituto de Astrofísica de Andalucía , IAA-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainInstitute of Astrophysics , Foundation for Research and Technology—Hellas, Voutes, 7110 Heraklion, Greece; Department of Physics, University of Crete , 70013 Heraklion, GreeceInstituto de Astrofísica de Andalucía , IAA-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainInstitut de Radioastronomie Millimétrique , Avenida Divina Pastora, 7, Local 20, E-18012 Granada, Spain; Max-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121 Bonn, GermanyInstitut de Radioastronomie Millimétrique , Avenida Divina Pastora, 7, Local 20, E-18012 Granada, SpainFinnish Centre for Astronomy with ESO, University of Turku , FI-20014 Turky, Finland; Department of Physics and Astronomy, University of Turku , FI-20014 Turku, FinlandFinnish Centre for Astronomy with ESO, University of Turku , FI-20014 Turky, FinlandCenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138 USACenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138 USACenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138 USAKorea Astronomy and Space Science Institute , 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Republic of KoreaKorea Astronomy and Space Science Institute , 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Republic of Korea; University of Science and Technology , Korea, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of KoreaKorea Astronomy and Space Science Institute , 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Republic of Korea; University of Science and Technology , Korea, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of KoreaKorea Astronomy and Space Science Institute , 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Republic of Korea; University of Science and Technology , Korea, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of KoreaKorea Astronomy and Space Science Institute , 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Republic of Korea; University of Science and Technology , Korea, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of KoreaSection of Astrophysics, Astronomy & Mechanics, Department of Physics, National and Kapodistrian University of Athens , Panepistimiopolis Zografos 15784, GreeceMax-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121 Bonn, GermanySpace Science Data Center , Agenzia Spaziale Italiana, Via del Politecnico snc, I-00133 Roma, Italy ; riccardo.middei@ssdc.asi.it; INAF Osservatorio Astronomico di Roma , Via Frascati 33, I-00040 Monte Porzio Catone (RM), ItalyINAF Osservatorio Astronomico di Cagliari , Via della Scienza 5, I-09047 Selargius (CA), ItalyIstituto Nazionale di Fisica Nucleare , Sezione di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, Italy; Dipartimento di Fisica, Università di Pisa , Largo B. Pontecorvo 3, I-56127 Pisa, ItalyNASA Marshall Space Flight Center , Huntsville, AL 35812, USAIstituto Nazionale di Fisica Nucleare , Sezione di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, ItalyDipartimento di Matematica e Fisica, Università degli Studi Roma Tre , Via della Vasca Navale 84, I-00146 Roma, ItalyNASA Marshall Space Flight Center , Huntsville, AL 35812, USAIstituto Nazionale di Fisica Nucleare , Sezione di Torino, Via Pietro Giuria 1, I-10125 Torino, Italy; Dipartimento di Fisica, Università degli Studi di Torino , Via Pietro Giuria 1, I-10125 Torino, ItalyIstituto Nazionale di Fisica Nucleare , Sezione di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, ItalyINAF Osservatorio Astrofisico di Arcetri , Largo Enrico Fermi 5, I-50125 Firenze, Italy; Dipartimento di Fisica e Astronomia, Università degli Studi di Firenze , Via Sansone 1, I-50019 Sesto Fiorentino (FI), Italy; Istituto Nazionale di Fisica Nucleare , Sezione di Firenze, Via Sansone 1, I-50019 Sesto Fiorentino (FI), ItalyINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyIstituto Nazionale di Fisica Nucleare , Sezione di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, ItalyAgenzia Spaziale Italiana , Via del Politecnico snc, I-00133 Roma, ItalyScience and Technology Institute, Universities Space Research Association , Huntsville, AL 35805, USASpace Science Data Center , Agenzia Spaziale Italiana, Via del Politecnico snc, I-00133 Roma, Italy ; riccardo.middei@ssdc.asi.it; Istituto Nazionale di Fisica Nucleare , Sezione di Roma “Tor Vergata”, Via della Ricerca Scientifica 1, I-00133 Roma, ItalyINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyDepartment of Physics and Kavli Institute for Particle Astrophysics and Cosmology, Stanford University , Stanford, CA 94305, USAINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyInstitut für Astronomie und Astrophysik, Universität Tübingen , Sand 1, D-72076 Tübingen, GermanyAstronomical Institute of the Czech Academy of Sciences , Boční II 1401/1, 14100 Praha 4, Czech RepublicNASA Marshall Space Flight Center , Huntsville, AL 35812, USARIKEN Cluster for Pioneering Research , 2-1 Hirosawa, Wako, Saitama 351-0198, JapanINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyCalifornia Institute of Technology , Pasadena, CA 91125, USAYamagata University , 1-4-12 Kojirakawa-machi, Yamagata-shi 990-8560, JapanOsaka University , 1-1 Yamadaoka, Suita, Osaka 565-0871, JapanUniversity of British Columbia , Vancouver, BC V6T 1Z4, CanadaInternational Center for Hadron Astrophysics, Chiba University , Chiba 263-8522, JapanNASA Marshall Space Flight Center , Huntsville, AL 35812, USAAstronomical Institute of the Czech Academy of Sciences , Boční II 1401/1, 14100 Praha 4, Czech RepublicDepartment of Physics and Astronomy and Space Science Center, University of New Hampshire , Durham, NH 03824, USARIKEN Cluster for Pioneering Research , 2-1 Hirosawa, Wako, Saitama 351-0198, JapanNASA Marshall Space Flight Center , Huntsville, AL 35812, USAPhysics Department and McDonnell Center for the Space Sciences, Washington University in St. Louis , St. Louis, MO 63130, USAINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyIstituto Nazionale di Fisica Nucleare , Sezione di Torino, Via Pietro Giuria 1, I-10125 Torino, ItalyIstituto Nazionale di Fisica Nucleare , Sezione di Torino, Via Pietro Giuria 1, I-10125 Torino, ItalyIstituto Nazionale di Fisica Nucleare , Sezione di Napoli, Strada Comunale Cinthia, I-80126 Napoli, ItalyUniversité de Strasbourg , CNRS, Observatoire Astronomique de Strasbourg, UMR 7550, F-67000 Strasbourg, FranceAgenzia Spaziale Italiana , Via del Politecnico snc, I-00133 Roma, ItalyIstituto Nazionale di Fisica Nucleare , Sezione di Torino, Via Pietro Giuria 1, I-10125 Torino, Italy; Dipartimento di Fisica, Università degli Studi di Torino , Via Pietro Giuria 1, I-10125 Torino, ItalyDipartimento di Matematica e Fisica, Università degli Studi Roma Tre , Via della Vasca Navale 84, I-00146 Roma, ItalyGraduate School of Science, Division of Particle and Astrophysical Science, Nagoya University , Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, JapanHiroshima Astrophysical Science Center, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, JapanINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyUniversity of Maryland , Baltimore County, Baltimore, MD 21250, USA; NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA; Center for Research and Exploration in Space Science and Technology , NASA/GSFC, Greenbelt, MD 20771, USADepartment of Physics, University of Hong Kong , Pokfulam, Hong KongNASA Marshall Space Flight Center , Huntsville, AL 35812, USADepartment of Physics and Kavli Institute for Particle Astrophysics and Cosmology, Stanford University , Stanford, CA 94305, USAIstituto Nazionale di Fisica Nucleare , Sezione di Torino, Via Pietro Giuria 1, I-10125 Torino, ItalyINAF Osservatorio Astronomico di Roma , Via Frascati 33, I-00040 Monte Porzio Catone (RM), ItalyDepartment of Astronomy and Astrophysics, Pennsylvania State University , University Park, PA 16801, USADepartment of Physics and Kavli Institute for Particle Astrophysics and Cosmology, Stanford University , Stanford, CA 94305, USAIstituto Nazionale di Fisica Nucleare , Sezione di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, ItalyUniversité Grenoble Alpes , CNRS, IPAG, F-38000 Grenoble, FranceINAF Osservatorio Astronomico di Cagliari , Via della Scienza 5, I-09047 Selargius (CA), ItalyINAF Osservatorio Astronomico di Cagliari , Via della Scienza 5, I-09047 Selargius (CA), ItalyDepartment of Physics and Astronomy, University of Turku , FI-20014 Turku, FinlandNASA Marshall Space Flight Center , Huntsville, AL 35812, USAINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyScience and Technology Institute, Universities Space Research Association , Huntsville, AL 35805, USADepartment of Physics and Kavli Institute for Particle Astrophysics and Cosmology, Stanford University , Stanford, CA 94305, USAIstituto Nazionale di Fisica Nucleare , Sezione di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, ItalyCenter for Astrophysics, Harvard & Smithsonian , 60 Garden St, Cambridge, MA 02138, USAINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyIstituto Nazionale di Fisica Nucleare , Sezione di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, ItalyScience and Technology Institute, Universities Space Research Association , Huntsville, AL 35805, USARIKEN Cluster for Pioneering Research , 2-1 Hirosawa, Wako, Saitama 351-0198, JapanDipartimento di Fisica e Astronomia, Università degli Studi di Padova , Via Marzolo 8, I-35131 Padova, ItalyGraduate School of Science, Division of Particle and Astrophysical Science, Nagoya University , Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, JapanNASA Marshall Space Flight Center , Huntsville, AL 35812, USANASA Marshall Space Flight Center , Huntsville, AL 35812, USADipartimento di Fisica, Università degli Studi di Roma “Tor Vergata,” Via della Ricerca Scientifica 1, I-00133 Roma, Italy; Istituto Nazionale di Fisica Nucleare , Sezione di Roma “Tor Vergata”, Via della Ricerca Scientifica 1, I-00133 Roma, Italy; Department of Astronomy, University of Maryland , College Park, MD 20742, USAINAF Osservatorio Astronomico di Cagliari , Via della Scienza 5, I-09047 Selargius (CA), ItalyDepartment of Physics and Astronomy, University of Turku , FI-20014 Turku, FinlandDipartimento di Fisica e Astronomia, Università degli Studi di Padova , Via Marzolo 8, I-35131 Padova, Italy; Mullard Space Science Laboratory, University College London , Holmbury St Mary, Dorking, Surrey RH5 6NT, UKAnton Pannekoek Institute for Astronomy & GRAPPA, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The NetherlandsNASA Marshall Space Flight Center , Huntsville, AL 35812, USAMullard Space Science Laboratory, University College London , Holmbury St Mary, Dorking, Surrey RH5 6NT, UKINAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, Italy; Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University , Nanning 530004, People’s Republic of ChinaMullard Space Science Laboratory, University College London , Holmbury St Mary, Dorking, Surrey RH5 6NT, UKThe lower-energy peak of the spectral energy distribution of blazars has commonly been ascribed to synchrotron radiation from relativistic particles in the jets. Despite the consensus regarding jet emission processes, the particle acceleration mechanism is still debated. Here, we present the first X-ray polarization observations of PG 1553+113, a high-synchrotron-peak blazar observed by the Imaging X-ray Polarimetry Explorer (IXPE). We detect an X-ray polarization degree of (10 ± 2)% along an electric-vector position angle of ψ _X = 86° ± 8°. At the same time, the radio and optical polarization degrees are lower by a factor of ∼3. During our IXPE pointing, we observed the first orphan optical polarization swing of the IXPE era, as the optical angle of PG 1553+113 underwent a smooth monotonic rotation by about 125°, with a rate of ∼17° day ^–1 . We do not find evidence of a similar rotation in either radio or X-rays, which suggests that the X-ray and optically emitting regions are separate or, at most, partially cospatial. Our spectropolarimetric results provide further evidence that the steady-state X-ray emission in blazars originates in a shock-accelerated and energy-stratified electron population.https://doi.org/10.3847/2041-8213/acec3eBL Lacertae objectsSpectropolarimetryPolarimetryActive galactic nucleiJetsX-ray active galactic nuclei |
| spellingShingle | Riccardo Middei Matteo Perri Simonetta Puccetti Ioannis Liodakis Laura Di Gesu Alan P. Marscher Nicole Rodriguez Cavero Fabrizio Tavecchio Immacolata Donnarumma Marco Laurenti Svetlana G. Jorstad Iván Agudo Herman L. Marshall Luigi Pacciani Dawoon E. Kim Francisco José Aceituno Giacomo Bonnoli Víctor Casanova Beatriz Agís-González Alfredo Sota Carolina Casadio Juan Escudero Ioannis Myserlis Albrecht Sievers Pouya M. Kouch Elina Lindfors Mark Gurwell Garrett K. Keating Ramprasad Rao Sincheol Kang Sang-Sung Lee Sang-Hyun Kim Whee Yeon Cheong Hyeon-Woo Jeong Emmanouil Angelakis Alexander Kraus Lucio A. Antonelli Matteo Bachetti Luca Baldini Wayne H. Baumgartner Ronaldo Bellazzini Stefano Bianchi Stephen D. Bongiorno Raffaella Bonino Alessandro Brez Niccolò Bucciantini Fiamma Capitanio Simone Castellano Elisabetta Cavazzuti Chien-Ting Chen Stefano Ciprini Enrico Costa Alessandra De Rosa Ettore Del Monte Niccolò Di Lalla Alessandro Di Marco Victor Doroshenko Michal Dovčiak Steven R. Ehlert Teruaki Enoto Yuri Evangelista Sergio Fabiani Riccardo Ferrazzoli Javier A. García Shuichi Gunji Kiyoshi Hayashida Jeremy Heyl Wataru Iwakiri Philip Kaaret Vladimir Karas Fabian Kislat Takao Kitaguchi Jeffery J. Kolodziejczak Henric Krawczynski Fabio La Monaca Luca Latronico Simone Maldera Alberto Manfreda Frédéric Marin Andrea Marinucci Francesco Massaro Giorgio Matt Ikuyuki Mitsuishi Tsunefumi Mizuno Fabio Muleri Michela Negro Chi-Yung Ng Stephen L. O’Dell Nicola Omodei Chiara Oppedisano Alessandro Papitto George G. Pavlov Abel L. Peirson Melissa Pesce-Rollins Pierre-Olivier Petrucci Maura Pilia Andrea Possenti Juri Poutanen Brian D. Ramsey John Rankin Ajay Ratheesh Oliver J. Roberts Roger W. Romani Carmelo Sgrò Patrick Slane Paolo Soffitta Gloria Spandre Douglas A. Swartz Toru Tamagawa Roberto Taverna Yuzuru Tawara Allyn F. Tennant Nicholas E. Thomas Francesco Tombesi Alessio Trois Sergey S. Tsygankov Roberto Turolla Jacco Vink Martin C. Weisskopf Kinwah Wu Fei Xie Silvia Zane IXPE and Multiwavelength Observations of Blazar PG 1553+113 Reveal an Orphan Optical Polarization Swing The Astrophysical Journal Letters BL Lacertae objects Spectropolarimetry Polarimetry Active galactic nuclei Jets X-ray active galactic nuclei |
| title | IXPE and Multiwavelength Observations of Blazar PG 1553+113 Reveal an Orphan Optical Polarization Swing |
| title_full | IXPE and Multiwavelength Observations of Blazar PG 1553+113 Reveal an Orphan Optical Polarization Swing |
| title_fullStr | IXPE and Multiwavelength Observations of Blazar PG 1553+113 Reveal an Orphan Optical Polarization Swing |
| title_full_unstemmed | IXPE and Multiwavelength Observations of Blazar PG 1553+113 Reveal an Orphan Optical Polarization Swing |
| title_short | IXPE and Multiwavelength Observations of Blazar PG 1553+113 Reveal an Orphan Optical Polarization Swing |
| title_sort | ixpe and multiwavelength observations of blazar pg 1553 113 reveal an orphan optical polarization swing |
| topic | BL Lacertae objects Spectropolarimetry Polarimetry Active galactic nuclei Jets X-ray active galactic nuclei |
| url | https://doi.org/10.3847/2041-8213/acec3e |
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