An IXPE-Led X-ray Spectro-Polarimetric Campaign on the Soft State of Cygnus X-1: X-ray Polarimetric Evidence for Strong Gravitational Lensing

Autor: Steiner, James F., Nathan, Edward, Hu, Kun, Krawczynski, Henric, Dovciak, Michal, Veledina, Alexandra, Muleri, Fabio, Svoboda, Jiri, Alabarta, Kevin, Parra, Maxime, Bhargava, Yash, Matt, Giorgio, Poutanen, Juri, Petrucci, Pierre-Olivier, Tennant, Allyn F., Baglio, M. Cristina, Baldini, Luca, Barnier, Samuel, Bhattacharyya, Sudip, Bianchi, Stefano, Brigitte, Maimouna, Cabezas, Mauricio, Cangemi, Floriane, Capitanio, Fiamma, Casey, Jacob, Cavero, Nicole Rodriguez, Castellano, Simone, Cavazzuti, Elisabetta, Chun, Sohee, Churazov, Eugene, Costa, Enrico, Di Lalla, Niccolo, Di Marco, Alessandro, Egron, Elise, Ewing, Melissa, Fabiani, Sergio, Garcia, Javier A., Green, David A., Grinberg, Victoria, Hadrava, Petr, Ingram, Adam, Kaaret, Philip, Kislat, Fabian, Kitaguchi, Takao, Kravtsov, Vadim, Kubatova, Brankica, La Monaca, Fabio, Latronico, Luca, Loktev, Vladislav, Malacaria, Christian, Marin, Frederic, Marinucci, Andrea, Maryeva, Olga, Mastroserio, Guglielmo, Mizuno, Tsunefumi, Negro, Michela, Omodei, Nicola, Podgorny, Jakub, Rankin, John, Ratheesh, Ajay, Rhodes, Lauren, Russell, David M., Slechta, Miroslav, Soffitta, Paolo, Spooner, Sean, Suleimanov, Valery, Tombesi, Francesco, Trushkin, Sergei A., Weisskopf, Martin C., Zane, Silvia, Zdziarski, Andrzej A., Zhang, Sixuan, Zhang, Wenda, Zhou, Menglei, Agudo, Ivan, Antonelli, Lucio A., Bachetti, Matteo, Baumgartner, Wayne H., Bellazzini, Ronaldo, Bongiorno, Stephen D., Bonino, Raffaella, Brez, Alessandro, Bucciantini, Niccolo, Chen, Chien-Ting, Ciprini, Stefano, De Rosa, Alessandra, Del Monte, Ettore, Di Gesu, Laura, Donnarumma, Immacolata, Doroshenko, Victor, Ehlert, Steven R., Enoto, Teruaki, Evangelista, Yuri, Ferrazzoli, Riccardo, Gunji, Shuichi, Hayashida, Kiyoshi, Heyl, Jeremy, Iwakiri, Wataru, Jorstad, Svetlana G., Karas, Vladimir, Kolodziejczak, Jeffery J., Liodakis, Ioannis, Maldera, Simone, Manfreda, Alberto, Marscher, Alan P., Marshall, Herman L., Massaro, Francesco, Mitsuishi, Ikuyuki, Ng, Chi-Yung, O'Dell, Stephen L., Oppedisano, Chiara, Papitto, Alessandro, Pavlov, George G., Peirson, Abel L., Perri, Matteo, Pesce-Rollins, Melissa, Pilia, Maura, Possenti, Andrea, Puccetti, Simonetta, Ramsey, Brian D., Roberts, Oliver J., Romani, Roger W., Sgro, Carmelo, Slane, Patrick, Spandre, Gloria, Swartz, Douglas A., Tamagawa, Toru, Tavecchio, Fabrizio, Taverna, Roberto, Tawara, Yuzuru, Thomas, Nicholas E., Trois, Alessio, Tsygankov, Sergey S., Turolla, Roberto, Vink, Jacco, Wu, Kinwah, Xie, Fei

We present the first X-ray spectropolarimetric results for Cygnus X-1 in its soft state from a campaign of five IXPE observations conducted during 2023 May-June. Companion multiwavelength data during the campaign are likewise shown. The 2-8 keV X-ray

Externí odkaz: http://arxiv.org/abs/2406.12014

Dramatic Drop in the X-Ray Polarization of Swift J1727.8$-$1613 in the Soft Spectral State

Autor: Svoboda, Jiří, Dovčiak, Michal, Steiner, James F., Kaaret, Philip, Podgorný, Jakub, Poutanen, Juri, Veledina, Alexandra, Muleri, Fabio, Taverna, Roberto, Krawczynski, Henric, Brigitte, Maïmouna, Datta, Sudeb Ranjan, Bianchi, Stefano, Segura, Noel Castro, García, Javier A., Ingram, Adam, Matt, Giorgio, Muñoz-Darias, Teo, Nathan, Edward, Weisskopf, Martin C., Altamirano, Diego, Baldini, Luca, Bollemeijer, Niek, Capitanio, Fiamma, Egron, Elise, Emami, Razieh, Hu, Kun, Marra, Lorenzo, Mastroserio, Guglielmo, Negro, Michela, Petrucci, Pierre-Olivier, Ratheesh, Ajay, Cavero, Nicole Rodriguez, Soffitta, Paolo, Tombesi, Francesco, Yang, Yi-Jung, Zhang, Yuexin

Publikováno v: The Astrophysical Journal Letters, 2024, 966, L35

Black-hole X-ray binaries exhibit different spectral and timing properties in different accretion states. The X-ray outburst of a recently discovered and extraordinarily bright source, Swift$~$J1727.8$-$1613, has enabled the first investigation of ho

Externí odkaz: http://arxiv.org/abs/2403.04689

First X-ray polarization measurement confirms the low black-hole spin in LMC X-3

Autor: Svoboda, Jiří, Dovčiak, Michal, Steiner, James F., Muleri, Fabio, Ingram, Adam, Yilmaz, Anastasiya, Cavero, Nicole Rodriguez, Marra, Lorenzo, Poutanen, Juri, Veledina, Alexandra, Mojaver, Mehrnoosh Rahbardar, Bianchi, Stefano, Garcia, Javier, Kaaret, Philip, Krawczynski, Henric, Matt, Giorgio, Podgorný, Jakub, Weisskopf, Martin C., Kislat, Fabian, Petrucci, Pierre-Olivier, Brigitte, Maimouna, Bursa, Michal, Fabiani, Sergio, Hu, Kun, Chun, Sohee, Mastroserio, Guglielmo, Mikušincová, Romana, Ratheesh, Ajay, Romani, Roger W., Soffitta, Paolo, Ursini, Francesco, Zane, Silvia, Agudo, Iván, Antonelli, Lucio A., Bachetti, Matteo, Baldini, Luca, Baumgartner, Wayne H., Bellazzini, Ronaldo, Bongiorno, Stephen D., Bonino, Raffaella, Brez, Alessandro, Bucciantini, Niccolo, Capitanio, Fiamma, Castellano, Simone, Cavazzuti, Elisabetta, Chen, Chien-Ting, Ciprini, Stefano, Costa, Enrico, De Rosa, Alessandra, Del Monte, Ettore, Di Gesu, Laura, Di Lalla, Niccolo, Di Marco, Alessandro, Donnarumma, Immacolata, Doroshenko, Victor, Ehlert, Steven, Enoto, Teruaki, Evangelista, Yuri, Ferrazzoli, Riccardo, Gunji, Shuichi, Hayashida, Kiyoshi, Heyl, Jeremy, Iwakiri, Wataru, Jorstad, Svetlana G., Karas, Vladimír, Kitaguchi, Takao, Kolodziejczak, Jeffery, La Monaca, Fabio, Latronico, Luca, Liodakis, Ioannis, Maldera, Simone, Manfreda, Alberto, Marin, Frédéric, Marinucci, Andrea, Marscher, Alan P., Marshall, Herman L., Massaro, Francesco, Mitsuishi, Ikuyuki, Mizuno, Tsunefumi, Negro, Michela, Ng, C. -Y., O'Dell, Stephen L., Omodei, Nicola, Oppedisano, Chiara, Papitto, Alessandro, Pavlov, George, Peirson, Abel, Perri, Matteo, Pesce-Rollins, Melissa, Pilia, Maura, Possenti, Andrea, Puccetti, Simonetta, Ramsey, Brian D., Rankin, John, Roberts, Oliver, Sgro, Carmelo, Slane, Patrick, Spandre, Gloria, Swartz, Douglas A., Tamagawa, Toru, Tavecchio, Fabrizio, Taverna, Roberto, Tawara, Yuzuru, Tennant, Allyn F., Thomas, Nicholas E., Tombesi, Francesco, Trois, Alessio, Tsygankov, Sergey S., Turolla, Roberto, Vink, Jacco, Wu, Kinwah, Xie, Fei

Publikováno v: The Astrophysical Journal, 2024, 960, 3

X-ray polarization is a powerful tool to investigate the geometry of accreting material around black holes, allowing independent measurements of the black hole spin and orientation of the innermost parts of the accretion disk. We perform the X-ray sp

Externí odkaz: http://arxiv.org/abs/2309.10813

X-ray polarization properties of partially ionized equatorial obscurers around accreting compact objects

Autor: Podgorný, Jakub, Marin, Frédéric, Dovčiak, Michal

We present the expected X-ray polarization signal resulting from distant reprocessing material around black holes. Using a central isotropic power-law emission at the center of the simulated model, we add distant equatorial and axially symmetric medi

Externí odkaz: http://arxiv.org/abs/2306.07214

X-ray Polarization of the Black Hole X-ray Binary 4U 1630-47 Challenges Standard Thin Accretion Disk Scenario

Autor: Ratheesh, Ajay, Dovčiak, Michal, Krawczynski, Henric, Podgorný, Jakub, Marra, Lorenzo, Veledina, Alexandra, Suleimanov, Valery, Cavero, Nicole Rodriguez, Steiner, James, Svoboda, Jiri, Marinucci, Andrea, Bianchi, Stefano, Negro, Michela, Matt, Giorgio, Tombesi, Francesco, Poutanen, Juri, Ingram, Adam, Taverna, Roberto, West, Andrew, Karas, Vladimir, Ursini, Francesco, Soffitta, Paolo, Capitanio, Fiamma, Viscolo, Domenico, Manfreda, Alberto, Muleri, Fabio, Parra, Maxime, Beheshtipour, Banafsheh, Chun, Sohee, Cibrario, Niccolò, Di Lalla, Niccolò, Fabiani, Sergio, Hu, Kun, Kaaret, Philip, Loktev, Vladislav, Mikušincová, Romana, Mizuno, Tsunefumi, Omodei, Nicola, Petrucci, Pierre-Olivier, Puccetti, Simonetta, Rankin, John, Zane, Silvia, Zhang, Sixuan, Agudo, Iván, Antonelli, Lucio, Bachetti, Matteo, Baldini, Luca, Baumgartner, Wayne, Bellazzini, Ronaldo, Bongiorno, Stephen, Bonino, Raffaella, Brez, Alessandro, Bucciantini, Niccolò, Castellano, Simone, Cavazzuti, Elisabetta, Chen, Chien-Ting, Ciprini, Stefano, Costa, Enrico, De Rosa, Alessandra, Del Monte, Ettore, Di Gesu, Laura, Di Marco, Alessandro, Donnarumma, Immacolata, Doroshenko, Victor, Ehlert, Steven, Enoto, Teruaki, Evangelista, Yuri, Ferrazzoli, Riccardo, Garcia, Javier, Gunji, Shuichi, Hayashida, Kiyoshi, Heyl, Jeremy, Iwakiri, Wataru, Jorstad, Svetlana, Kislat, Fabian, Kitaguchi, Takao, Kolodziejczak, Jeffery, La Monaca, Fabio, Latronico, Luca, Liodakis, Ioannis, Maldera, Simone, Marin, Frédéric, Marscher, Alan, Marshall, Herman, Massaro, Francesco, Mitsuishi, Ikuyuki, Ng, C. -Y., O'Dell, Stephen, Oppedisano, Chiara, Papitto, Alessandro, Pavlov, George, Peirson, Abel, Perri, Matteo, Pesce-Rollins, Melissa, Pilia, Maura, Possenti, Andrea, Ramsey, Brian, Roberts, Oliver, Romani, Roger, Sgrò, Carmelo, Slane, Patrick, Spandre, Gloria, Swartz, Douglas, Tamagawa, Toru, Tavecchio, Fabrizio, Tawara, Yuzuru, Tennant, Allyn, Thomas, Nicholas, Trois, Alessio, Tsygankov, Sergey, Turolla, Roberto, Vink, Jacco, Weisskopf, Martin, Wu, Kinwah, Xie, Fei

Publikováno v: 2024 ApJ 964 77

Large energy-dependent X-ray polarization degree is detected by the Imaging X-ray Polarimetry Explorer ({IXPE}) in the high-soft emission state of the black hole X-ray binary 4U 1630--47. The highly significant detection (at $\approx50\sigma$ confide

Externí odkaz: http://arxiv.org/abs/2304.12752