The IXPE View of GRB 221009A

The IXPE View of GRB 221009A
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DOI：
10.3847/2041-8213/acba17
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发表时间：
2023-01
期刊：
The Astrophysical Journal Letters
影响因子：
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通讯作者：
M. Negro;N. Di Lalla;N. Omodei;P. Veres;S. Silvestri;A. Manfreda;E. Burns;L. Baldini;E. Costa;S. Ehlert;J. Kennea;I. Liodakis;H. Marshall;S. Mereghetti;R. Middei;F. Muleri;S. O’Dell;O. Roberts;R. Romani;C. Sgro’;Masanobu Terashima;A. Tiengo;Domenico Viscolo;A. Di Marco;F. La Monaca;L. Latronico;G. Matt;M. Perri;S. Puccetti;J. Poutanen;A. Ratheesh;D. Rogantini;P. Slane;P. Soffitta;E. Lindfors;K. Nilsson;Anni Kasikov;A. Marscher;F. Tavecchio;N. Cibrario;S. Gunji;C. Malacaria;A. Paggi;Yi-Jung Yang;S. Zane;M. Weisskopf;I. Agudo;L. A. Antonelli;M. Bachetti;W. Baumgartner;R. Bellazzini;S. Bianchi;S. Bongiorno;R. Bonino;A. Brez;N. Bucciantini;F. Capitanio;S. Castellano;E. Cavazzuti;Chien-Ting Chen;S. Ciprini;A. De Rosa;E. Del Monte;L. Di Gesu;I. Donnarumma;V. Doroshenko;M. Dovc̆iak;T. Enoto;Y. Evangelista;S. Fabiani;R. Ferrazzoli;Javier A. García;K. Hayashida;J. Heyl;W. Iwakiri;S. Jorstad;P. Kaaret;V. Karas;F. Kislat;T. Kitaguchi;J. Kolodziejczak;H. Krawczynski;S. Maldera;Frédéric Marin;A. Marinucci;I. Mitsuishi;T. Mizuno;C. Ng;C. Oppedisano;A. Papitto;G. Pavlov;A. L. Peirson;M. Pesce-Rollins;P. Petrucci;M. Pilia;A. Possenti;B. Ramsey;J. Rankin;G. Spandre;D. Swartz;T. Tamagawa;R. Taverna;Y. Tawara;A. Tennant;N. Thomas;F. Tombesi;A. Trois;S. Tsygankov;R. Turolla;J. Vink;K. Wu;F. Xie
M. Negro;N. Di Lalla;N. Omodei;P. Veres;S. Silvestri;A. Manfreda;E. Burns;L. Baldini;E. Costa;S. Ehlert;J. Kennea;I. Liodakis;H. Marshall;S. Mereghetti;R. Middei;F. Muleri;S. O’Dell;O. Roberts;R. Romani;C. Sgro’;Masanobu Terashima;A. Tiengo;Domenico Viscolo;A. Di Marco;F. La Monaca;L. Latronico;G. Matt;M. Perri;S. Puccetti;J. Poutanen;A. Ratheesh;D. Rogantini;P. Slane;P. Soffitta;E. Lindfors;K. Nilsson;Anni Kasikov;A. Marscher;F. Tavecchio;N. Cibrario;S. Gunji;C. Malacaria;A. Paggi;Yi-Jung Yang;S. Zane;M. Weisskopf;I. Agudo;L. A. Antonelli;M. Bachetti;W. Baumgartner;R. Bellazzini;S. Bianchi;S. Bongiorno;R. Bonino;A. Brez;N. Bucciantini;F. Capitanio;S. Castellano;E. Cavazzuti;Chien-Ting Chen;S. Ciprini;A. De Rosa;E. Del Monte;L. Di Gesu;I. Donnarumma;V. Doroshenko;M. Dovc̆iak;T. Enoto;Y. Evangelista;S. Fabiani;R. Ferrazzoli;Javier A. García;K. Hayashida;J. Heyl;W. Iwakiri;S. Jorstad;P. Kaaret;V. Karas;F. Kislat;T. Kitaguchi;J. Kolodziejczak;H. Krawczynski;S. Maldera;Frédéric Marin;A. Marinucci;I. Mitsuishi;T. Mizuno;C. Ng;C. Oppedisano;A. Papitto;G. Pavlov;A. L. Peirson;M. Pesce-Rollins;P. Petrucci;M. Pilia;A. Possenti;B. Ramsey;J. Rankin;G. Spandre;D. Swartz;T. Tamagawa;R. Taverna;Y. Tawara;A. Tennant;N. Thomas;F. Tombesi;A. Trois;S. Tsygankov;R. Turolla;J. Vink;K. Wu;F. Xie
中科院分区：
其他
文献类型：
--
作者：
M. Negro;N. Di Lalla;N. Omodei;P. Veres;S. Silvestri;A. Manfreda;E. Burns;L. Baldini;E. Costa;S. Ehlert;J. Kennea;I. Liodakis;H. Marshall;S. Mereghetti;R. Middei;F. Muleri;S. O’Dell;O. Roberts;R. Romani;C. Sgro’;Masanobu Terashima;A. Tiengo;Domenico Viscolo;A. Di Marco;F. La Monaca;L. Latronico;G. Matt;M. Perri;S. Puccetti;J. Poutanen;A. Ratheesh;D. Rogantini;P. Slane;P. Soffitta;E. Lindfors;K. Nilsson;Anni Kasikov;A. Marscher;F. Tavecchio;N. Cibrario;S. Gunji;C. Malacaria;A. Paggi;Yi-Jung Yang;S. Zane;M. Weisskopf;I. Agudo;L. A. Antonelli;M. Bachetti;W. Baumgartner;R. Bellazzini;S. Bianchi;S. Bongiorno;R. Bonino;A. Brez;N. Bucciantini;F. Capitanio;S. Castellano;E. Cavazzuti;Chien-Ting Chen;S. Ciprini;A. De Rosa;E. Del Monte;L. Di Gesu;I. Donnarumma;V. Doroshenko;M. Dovc̆iak;T. Enoto;Y. Evangelista;S. Fabiani;R. Ferrazzoli;Javier A. García;K. Hayashida;J. Heyl;W. Iwakiri;S. Jorstad;P. Kaaret;V. Karas;F. Kislat;T. Kitaguchi;J. Kolodziejczak;H. Krawczynski;S. Maldera;Frédéric Marin;A. Marinucci;I. Mitsuishi;T. Mizuno;C. Ng;C. Oppedisano;A. Papitto;G. Pavlov;A. L. Peirson;M. Pesce-Rollins;P. Petrucci;M. Pilia;A. Possenti;B. Ramsey;J. Rankin;G. Spandre;D. Swartz;T. Tamagawa;R. Taverna;Y. Tawara;A. Tennant;N. Thomas;F. Tombesi;A. Trois;S. Tsygankov;R. Turolla;J. Vink;K. Wu;F. Xie

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我们给出了伽马射线221009A的IXPE观测结果，其中包括软X射线能带内瞬发和余辉发射的线偏振度上限。伽马射线暴221009A是一次异常明亮的伽马射线暴(GRB)，于2022年10月9日穿过银河系的尘埃到达地球。10月11日，成像X射线偏振探测器(IXPE)指向伽玛暴221009A，首次观测到伽玛暴余辉的2-8keV X射线偏振。在99%的置信度水平下，我们将余辉发射的偏振度上限定为13.8%。这一结果提供了对GRB的喷射开放角度和视角的限制，或者可替换地，对发射区的其他属性的限制。此外，IXPE捕获了尘埃散射光子的晕环，这些光子是伽玛暴快速发射的回声。瞬时偏振度的99%置信度上限取决于背景模型假设，其范围在∼55%到∼82%之间。这一单一的IXPE指向既提供了对伽玛射线暴余辉X射线偏振的首次评估，也提供了对瞬发和余辉阶段的首次伽玛暴偏振观测。
We present the IXPE observation of GRB 221009A, which includes upper limits on the linear polarization degree of both prompt and afterglow emission in the soft X-ray energy band. GRB 221009A is an exceptionally bright gamma-ray burst (GRB) that reached Earth on 2022 October 9 after traveling through the dust of the Milky Way. The Imaging X-ray Polarimetry Explorer (IXPE) pointed at GRB 221009A on October 11 to observe, for the first time, the 2–8 keV X-ray polarization of a GRB afterglow. We set an upper limit to the polarization degree of the afterglow emission of 13.8% at a 99% confidence level. This result provides constraints on the jet opening angle and the viewing angle of the GRB, or alternatively, other properties of the emission region. Additionally, IXPE captured halo-rings of dust-scattered photons that are echoes of the GRB prompt emission. The 99% confidence level upper limit to the prompt polarization degree depends on the background model assumption, and it ranges between ∼55% and ∼82%. This single IXPE pointing provides both the first assessment of X-ray polarization of a GRB afterglow and the first GRB study with polarization observations of both the prompt and afterglow phases.