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1. X-ray Polarimetry of the accreting pulsar 1A~0535+262 in the supercritical state with PolarLight

Author

Long, Xiangyun, Feng, Hua, Li, Hong, Kong, Ling-Da, Heyl, Jeremy, Ji, Long, Tao, Lian, Muleri, Fabio, Wu, Qiong, Zhu, Jiahuan, Huang, Jiahui, Minuti, Massimo, Jiang, Weichun, Citraro, Saverio, Nasimi, Hikmat, Yu, Jiandong, Jin, Ge, Zeng, Ming, An, Peng, Baldini, Luca, Bellazzini, Ronaldo, Brez, Alessandro, Latronico, Luca, Sgrò, Carmelo, Spandre, Gloria, Pinchera, Michele, Soffitta, Paolo, and Costa, Enrico

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The X-ray pulsar 1A 0535+262 exhibited a giant outburst in 2020, offering us a unique opportunity for X-ray polarimetry of an accreting pulsar in the supercritical state. Measurement with PolarLight yielded a non-detection in 3-8 keV; the 99% upper limit of the polarization fraction (PF) is found to be 0.34 averaged over spin phases, or 0.51 based on the rotating vector model. No useful constraint can be placed with phase resolved polarimetry. These upper limits are lower than a previous theoretical prediction of 0.6-0.8, but consistent with those found in other accreting pulsars, like Her X-1, Cen X-3, 4U 1626-67, and GRO J1008-57, which were in the subcritical state, or at least not confidently in the supercritical state, during the polarization measurements. Our results suggest that the relatively low PF seen in accreting pulsars cannot be attributed to the source not being in the supercritical state, but could be a general feature., Comment: accepted for publication in ApJ

Published
2023
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2. Calibration of the IXPE focal plane X-ray polarimeters to polarized radiation

Author

Di Marco, Alessandro, Fabiani, Sergio, La Monaca, Fabio, Muleri, Fabio, Rankin, John, Soffitta, Paolo, Xie, Fei, Amici, Fabrizio, attinà, Primo, Bachetti, Matteo, Baldini, Luca, Barbanera, Mattia, Baumgartner, Wayne, Bellazzini, Ronaldo, Borotto, Fabio, Brez, Alessandro, Brienza, Daniele, Caporale, Ciro, Cardelli, Claudia, Carpentiero, Rita, Castellano, Simone, Castronuovo, Marco, Cavalli, Luca, Cavazzuti, Elisabetta, Ceccanti, Marco, Centrone, Mauro, Citraro, Saverio, Costa, Enrico, D'Alba, Elisa, D'Amico, Fabio, Del Monte, Ettore, Di Cosimo, Sergio, Di Lalla, Niccolò, Di Persio, Giuseppe, Donnarumma, Immacolata, Evangelista, Yuri, Ferrazzoli, Riccardo, Latronico, Luca, Lefevre, Carlo, Loffredo, Pasqualino, Lorenzi, Paolo, Lucchesi, Leonardo, Magazzù, Carlo, Magazzù, Guido, Maldera, Simone, Manfreda, Alberto, Mangraviti, Elio, Marengo, Marco, Matt, Giorgio, Mereu, Paolo, Minuti, Massimo, Morbidini, Alfredo, Mosti, Federico, Nasimi, Hikmat, Negri, Barbara, Nuti, Alessio, O'Dell, Stephen L., Orsini, Leonardo, Perri, Matteo, Pesce-Rollins, Melissa, Piazzolla, Raffaele, Pieraccini, Stefano, Pilia, Maura, Pinchera, Michele, Profeti, Alessandro, Puccetti, Simonetta, Ramsey, Brian D., Ratheesh, Ajay, Rubini, Alda, Santoli, Francesco, Sarra, Paolo, Scalise, Emanuele, Sciortino, Andrea, Sgrò, Carmelo, Spandre, Gloria, Tardiola, Marcello, Tennant, Allyn F., Tobia, Antonino, Trois, Alessio, Vimercati, Marco, Weisskopf, Martin C., Zanetti, Davide, and Zanetti, Francesco

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

IXPE (Imaging X-ray Polarimetry Explorer) is a NASA Small Explorer mission -- in partnership with the Italian Space Agency (ASI) -- dedicated to X-ray polarimetry in the 2--8 keV energy band. The IXPE telescope comprises three grazing incidence mirror modules coupled to three detector units hosting each one a Gas Pixel Detector (GPD), a gas detector that allows measuring the polarization degree by using the photoelectric effect. A wide and accurate ground calibration was carried out on the IXPE Detector Units (DUs) at INAF-IAPS, in Italy, where a dedicated facility was set-up at this aim. In this paper, we present the results obtained from this calibration campaign to study the IXPE focal plane detector response to polarized radiation. In particular, we report on the modulation factor, which is the main parameter to estimate the sensitivity of a polarimeter., Comment: Accepted for publication on The Astronomical Journal

Published
2022
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3. A significant detection of X-ray Polarization in Sco X-1 with PolarLight and constraints on the corona geometry

Author

Long, Xiangyun, Feng, Hua, Li, Hong, Zhu, Jiahuan, Wu, Qiong, Huang, Jiahui, Minuti, Massimo, Jiang, Weichun, Yang, Dongxin, Citraro, Saverio, Nasimi, Hikmat, Yu, Jiandong, Jin, Ge, Zeng, Ming, An, Peng, Jiang, Jiachen, Costa, Enrico, Baldini, Luca, Bellazzini, Ronaldo, Brez, Alessandro, Latronico, Luca, Sgro, Carmelo, Spandre, Gloria, Pinchera, Michele, Muleri, Fabio, and Soffitta, Paolo

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

We report the detection of X-ray polarization in the neutron star low mass X-ray binary Scorpius (Sco) X-1 with PolarLight. The result is energy dependent, with a non-detection in 3-4 keV but a 4$\sigma$ detection in 4-8 keV; it is also flux dependent in the 4-8 keV band, with a non-detection when the source displays low fluxes but a 5$\sigma$ detection during high fluxes, in which case we obtain a polarization fraction of $0.043 \pm 0.008$ and a polarization angle of $52.6^\circ \pm 5.4^\circ$. This confirms a previous marginal detection with OSO-8 in the 1970s, and marks Sco X-1 the second astrophysical source with a significant polarization measurement in the keV band. The measured polarization angle is in line with the jet orientation of the source on the sky plane ($54^\circ$), which is supposedly the symmetric axis of the system. Combining previous spectral analysis, our measurements suggest that an optically thin corona is located in the transition layer under the highest accretion rates, and disfavor the extended accretion disk corona model., Comment: Submitted to AAS journals. We are grateful to some experts for useful comments

Published
2021
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4. The Imaging X-Ray Polarimetry Explorer (IXPE): Pre-Launch

Author

Weisskopf, Martin C., Soffitta, Paolo, Baldini, Luca, Ramsey, Brian D., O'Dell, Stephen L., Romani, Roger W., Matt, Giorgio, Deininger, William D., Baumgartner, Wayne H., Bellazzini, Ronaldo, Costa, Enrico, Kolodziejczak, Jeffery J., Latronico, Luca, Marshall, Herman L., Muleri, Fabio, Bongiorno, Stephen D., Tennant, Allyn, Bucciantini, Niccolo, Dovciak, Michal, Marin, Frederic, Marscher, Alan, Poutanen, Juri, Slane, Pat, Turolla, Roberto, Kalinowski, William, Di Marco, Alessandro, Fabiani, Sergio, Minuti, Massimo, La Monaca, Fabio, Pinchera, Michele, Rankin, John, Sgro', Carmelo, Trois, Alessio, Xie, Fei, Alexander, Cheryl, Allen, D. Zachery, Amici, Fabrizio, Andersen, Jason, Antonelli, Angelo, Antoniak, Spencer, Attina', Primo, Barbanera, Mattia, Bachetti, Matteo, Baggett, Randy M., Bladt, Jeff, Brez, Alessandro, Bonino, Raffaella, Boree, Christopher, Borotto, Fabio, Breeding, Shawn, Brienza, Daniele, Bygott, H. Kyle, Caporale, Ciro, Cardelli, Claudia, Carpentiero, Rita, Castellano, Simone, Castronuovo, Marco, Cavalli, Luca, Cavazzuti, Elisabetta, Ceccanti, Marco, Centrone, Mauro, Citraro, Saverio, Amico, Fabio D', D'Alba, Elisa, Di Gesu, Laura, Del Monte, Ettore, Dietz, Kurtis L., Di Lalla, Niccolo', Di Persio, Giuseppe, Dolan, David, Donnarumma, Immacolata, Evangelista, Yuri, Ferrant, Kevin, Ferrazzoli, Riccardo, Ferrie, MacKenzie, Footdale, Joseph, Forsyth, Brent, Foster, Michelle, Garelick, Benjamin, Gunji, Shuichi, Gurnee, Eli, Head, Michael, Hibbard, Grant, Johnson, Samantha, Kelly, Erik, Kilaru, Kiranmayee, Lefevre, Carlo, Roy, Shelley Le, Loffredo, Pasqualino, Lorenzi, Paolo, Lucchesi, Leonardo, Maddox, Tyler, Magazzu, Guido, Maldera, Simone, Manfreda, Alberto, Mangraviti, Elio, Marengo, Marco, Marrocchesi, Alessandra, Massaro, Francesco, Mauger, David, McCracken, Jeffrey, McEachen, Michael, Mize, Rondal, Mereu, Paolo, Mitchell, Scott, Mitsuishi, Ikuyuki, Morbidini, Alfredo, Mosti, Federico, Nasimi, Hikmat, Negri, Barbara, Negro, Michela, Nguyen, Toan, Nitschke, Isaac, Nuti, Alessio, Onizuka, Mitch, Oppedisano, Chiara, Orsini, Leonardo, Osborne, Darren, Pacheco, Richard, Paggi, Alessandro, Painter, Will, Pavelitz, Steven D., Pentz, Christina, Piazzolla, Raffaele, Perri, Matteo, Pesce-Rollins, Melissa, Peterson, Colin, Pilia, Maura, Profeti, Alessandro, Puccetti, Simonetta, Ranganathan, Jaganathan, Ratheesh, Ajay, Reedy, Lee, Root, Noah, Rubini, Alda, Ruswick, Stephanie, Sanchez, Javier, Sarra, Paolo, Santoli, Francesco, Scalise, Emanuele, Sciortino, Andrea, Schroeder, Christopher, Seek, Tim, Sosdian, Kalie, Spandre, Gloria, Speegle, Chet O., Tamagawa, Toru, Tardiola, Marcello, Tobia, Antonino, Thomas, Nicholas E., Valerie, Robert, Vimercati, Marco, Walden, Amy L., Weddendorf, Bruce, Wedmore, Jeffrey, Welch, David, Zanetti, Davide, and Zanetti, Francesco

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Scheduled to launch in late 2021, the Imaging X-ray Polarimetry Explorer (IXPE) is a NASA Small Explorer Mission in collaboration with the Italian Space Agency (ASI). The mission will open a new window of investigation - imaging X-ray polarimetry. The observatory features 3 identical telescopes each consisting of a mirror module assembly with a polarization-sensitive imaging X-ray detector at the focus. A coilable boom, deployed on orbit, provides the necessary 4-m focal length. The observatory utilizes a 3-axis-stabilized spacecraft which provides services such as power, attitude determination and control, commanding, and telemetry to the ground. During its 2-year baseline mission, IXPE will conduct precise polarimetry for samples of multiple categories of X-ray sources, with follow-on observations of selected targets.

Published
2021

5. The Instrument of the Imaging X-ray Polarimetry Explorer

Author

Soffitta, Paolo, Baldini, Luca, Bellazzini, Ronaldo, Costa, Enrico, Latronico, Luca, Muleri, Fabio, Del Monte, Ettore, Fabiani, Sergio, Minuti, Massimo, Pinchera, Michele, Sgrò, Carmelo, Spandre, Gloria, Trois, Alessio, Amici, Fabrizio, Andersson, Hans, Attinà, Primo, Bachetti, Matteo, Barbanera, Mattia, Borotto, Fabio, Brez, Alessandro, Brienza, Daniele, Caporale, Ciro, Cardelli, Claudia, Carpentiero, Rita, Castellano, Simone, Castronuovo, Marco, Cavalli, Luca, Cavazzuti, Elisabetta, Ceccanti, Marco, Centrone, Mauro, Ciprini, Stefano, Citraro, Saverio, Amico, Fabio D', Alba, Elisa D', Di Cosimo, Sergio, Di Lalla, Niccolò, Di Marco, Alessandro, Di Persio, Giuseppe, Donnarumma, Immacolata, Evangelista, Yuri, Ferrazzoli, Riccardo, Hayato, Asami, Kitaguchi, Takao, La Monaca, Fabio, Lefevre, Carlo, Loffredo, Pasqualino, Lorenzi, Paolo, Lucchesi, Leonardo, Magazzu, Carlo, Maldera, Simone, Manfreda, Alberto, Mangraviti, Elio, Marengo, Marco, Matt, Giorgio, Mereu, Paolo, Morbidini, Alfredo, Mosti, Federico, Nakano, Toshio, Nasimi, Hikmat, Negri, Barbara, Nenonen, Seppo, Nuti, Alessio, Orsini, Leonardo, Perri, Matteo, Rollins, Melissa Pesce, Piazzolla, Raffaele, Pilia, Maura, Profeti, Alessandro, Puccetti, Simonetta, Rankin, John, Ratheesh, Ajay, Rubini, Alda, Santoli, Francesco, Sarra, Paolo, Scalise, Emanuele, Sciortino, Andrea, Tamagawa, Toru, Tardiola, Marcello, Tobia, Antonino, Vimercati, Marco, and Xie, Fei

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

While X-ray Spectroscopy, Timing and Imaging have improved verymuch since 1962, when the first astronomical non-solar source was discovered, especially with the launch of Newton/X-ray Multi-Mirror Mission, Rossi/X-ray Timing Explorer and Chandra/Advanced X-ray Astrophysics Facility, the progress of X-ray polarimetry has been meager. This is in part due to the lack of sensitive polarization detectors, in part due to the fate of approved missions and in part because the celestial X-ray sources appeared less polarized than expected. Only one positive measurement has been available until now. Indeed the eight Orbiting Solar Observatory measured the polarization of the Crab nebula in the 70s. The advent of techniques of microelectronics allowed for designing a detector based on the photoelectric effect in gas in an energy range where the optics are efficient in focusing X-rays. Herewe describe the Instrument, which is the major contribution of the Italian collaboration to the SmallExplorer mission called IXPE, the Imaging X-ray Polarimetry Explorer, which will be flown in late 2021. The instrument, is composed of three Detector Units, based on this technique, and a Detector Service Unit. Three Mirror Modules provided by Marshall Space Flight Center focus X-rays onto the detectors. In the following we will show the technological choices, their scientific motivation and the results from the calibration of the Instrument. IXPE will perform imaging, timing and energy resolved polarimetry in the 2-8 keV energy band opening this window of X-ray astronomy to tens of celestial sources of almost all classes., Comment: 25 pages, 12 figures, 5 tables (accepted for publication in Astronomical Journal)

Published
2021
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6. X-ray polarimetry of the Crab nebula with PolarLight: polarization recovery after the glitch and a secular position angle variation

Author

Long, Xiangyun, Feng, Hua, Li, Hong, Zhu, Jiahuan, Wu, Qiong, Huang, Jiahui, Minuti, Massimo, Jiang, Weichun, Wang, Weihua, Xu, Renxin, Costa, Enrico, Yang, Dongxin, Citraro, Saverio, Nasimi, Hikmat, Yu, Jiandong, Jin, Ge, Zeng, Ming, An, Peng, Baldini, Luca, Bellazzini, Ronaldo, Brez, Alessandro, Latronico, Luca, Sgro, Carmelo, Spandre, Gloria, Pinchera, Michele, Muleri, Fabio, and Soffitta, Paolo

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

We report follow-up observations of the Crab nebula with the PolarLight X-ray polarimeter, which revealed a possible variation in polarization associated with a pulsar glitch in 2019. The new observations confirm that the polarization has recovered roughly 100 days after the glitch. With the new observations, we find that the polarization angle (PA) measured with PolarLight from the total nebular emission has a difference of 18.0 +- 4.6 (deg) from that measured 42 years ago with OSO-8, indicating a secular evolution of polarization with either the Crab nebula or pulsar. The long-term variation in PA could be a result of multiple glitches in the history, magnetic reconnection or movement of synchrotron emitting structures in the nebula, or secular evolution of the pulsar magnetic geometry., Comment: ApJ Letters to appear

Published
2021
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7. Discrimination of background events in the PolarLight X-ray polarimeter

Author

Zhu, Jiahuan, Li, Hong, Feng, Hua, Huang, Jiahui, Long, Xiangyun, Wu, Qiong, Jiang, Weichun, Minuti, Massimo, Citraro, Saverio, Nasimi, Hikmat, Yang, Dongxin, Yu, Jiandong, Jin, Ge, Zeng, Ming, An, Peng, Baldini, Luca, Bellazzini, Ronaldo, Brez, Alessandro, Latronico, Luca, Sgro, Carmelo, Spandre, Gloria, Pinchera, Michele, Muleri, Fabio, Soffitta, Paolo, and Costa, Enrico

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

PolarLight is a space-borne X-ray polarimeter that measures the X-ray polarization via electron tracking in an ionization chamber. It is a collimated instrument and thus suffers from the background on the whole detector plane. The majority of background events are induced by high energy charged particles and show ionization morphologies distinct from those produced by X-rays of interest. Comparing on-source and off-source observations, we find that the two datasets display different distributions on image properties. The boundaries between the source and background distributions are obtained and can be used for background discrimination. Such a means can remove over 70% of the background events measured with PolarLight. This approaches the theoretical upper limit of the background fraction that is removable and justifies its effectiveness. For observations with the Crab nebula, the background contamination decreases from 25% to 8% after discrimination, indicative of a polarimetric sensitivity of around 0.2 Crab for PolarLight. This work also provides insights into future X-ray polarimetric telescopes., Comment: accepted for publication in Research in Astronomy and Astrophysics

Published
2021
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8. Modeling the in-orbit background of PolarLight

Author

Huang, Jiahui, Feng, Hua, Li, Hong, Long, Xiangyun, Yang, Dongxin, Zeng, Weihe, Wu, Qiong, Jiang, Weichun, Minuti, Massimo, Costa, Enrico, Muleri, Fabio, Citraro, Saverio, Nasimi, Hikmat, Yu, Jiandong, Jin, Ge, Zeng, Zhi, Zeng, Ming, An, Peng, Baldini, Luca, Bellazzini, Ronaldo, Brez, Alessandro, Latronico, Luca, Sgro, Carmelo, Spandre, Gloria, Pinchera, Michele, and Soffitta, Paolo

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

PolarLight is a gas pixel X-ray polarimeter mounted on a CubeSat, which was launched into a Sun-synchronous orbit in October 2018. We build a mass model of the whole CubeSat with the Geant4 toolkit to simulate the background induced by the cosmic X-ray background (CXB) and high energy charged particles in the orbit. The simulated energy spectra and morphologies of event images both suggest that the measured background with PolarLight is dominated by high energy electrons, with a minor contribution from protons and the CXB. The simulation reveals that, in the energy range of 2-8 keV, there are roughly 28% of the background events are caused by energy deposit from a secondary electron with an energy of a few keV, in a physical process identical to the detection of X-rays. Thus, this fraction of background cannot be discriminated from X-ray events. The background distribution is uneven on the detector plane, with an enhancement near the edges. The edge effect is because high energy electrons tend to produce long tracks, which are discarded by the readout electronics unless they have partial energy deposits near the edges. The internal background rate is expected to be around 6 x 10^-3 counts/s/cm2 in 2-8 keV if an effective particle discrimination algorithm can be applied. This indicates that the internal background should be negligible for future focusing X-ray polarimeters with a focal size in the order of mm., Comment: accepted for publication in ApJ

Published
2021
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9. Re-detection and a Possible Time Variation of Soft X-ray Polarisation from the Crab

Author

Feng, Hua, Li, Hong, Long, Xiangyun, Bellazzini, Ronaldo, Costa, Enrico, Wu, Qiong, Huang, Jiahui, Jiang, Weichun, Minuti, Massimo, Wang, Weihua, Xu, Renxin, Yang, Dongxin, Baldini, Luca, Citraro, Saverio, Nasimi, Hikmat, Soffitta, Paolo, Muleri, Fabio, Jung, Aera, Yu, Jiandong, Jin, Ge, Zeng, Ming, An, Peng, Brez, Alessandro, Latronico, Luca, Sgro, Carmelo, Spandre, Gloria, and Pinchera, Michele

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The Crab nebula is so far the only celestial object with a statistically significant detection in soft x-ray polarimetry, a window that has not been explored in astronomy since the 1970s. However, soft x-ray polarimetry is expected to be a sensitive probe of magnetic fields in high energy astrophysical objects including rotation-powered pulsars and pulsar wind nebulae. Here we report the re-detection of soft x-ray polarisation after 40 years from the Crab nebula and pulsar with PolarLight, a miniature polarimeter utilising a novel technique onboard a CubeSat. The polarisation fraction of the Crab in the on-pulse phases was observed to decrease after a glitch of the Crab pulsar on July 23, 2019, while that of the pure nebular emission remained constant within uncertainty. The phenomenon may have lasted about 100 days. If the association between the glitch and polarisation change can be confirmed with future observations, it will place strong constraints on the physical mechanism of the high energy emission and glitch of pulsars., Comment: Authors' version of an article published in Nature Astronomy on 11 May 2020. Link to the paper: https://www.nature.com/articles/s41550-020-1088-1

Published
2020
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10. In-orbit Operation and Performance of the CubeSat Soft X-ray Polarimeter PolarLight

Author

Li, Hong, Long, Xiangyun, Feng, Hua, Wu, Qiong, Huang, Jiahui, Jiang, Weichun, Minuti, Massimo, Yang, Dongxin, Citraro, Saverio, Nasimi, Hikmat, Yu, Jiandong, Jin, Ge, Zeng, Ming, An, Peng, Baldini, Luca, Bellazzini, Ronaldo, Brez, Alessandro, Latronico, Luca, Sgro, Carmelo, Spandre, Gloria, Pinchera, Michele, Muleri, Fabio, Soffitta, Paolo, and Costa, Enrico

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

PolarLight is a compact soft X-ray polarimeter onboard a CubeSat, which was launched into a low-Earth orbit on October 29, 2018. In March 2019, PolarLight started full operation, and since then, regular observations with the Crab nebula, Sco X-1, and background regions have been conducted. Here we report the operation, calibration, and performance of PolarLight in the orbit. Based on these, we discuss how one can run a low-cost, shared CubeSat for space astronomy, and how CubeSats can play a role in modern space astronomy for technical demonstration, science observations, and student training., Comment: accepted for publication in Advances in Space Research

Published
2020
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11. PolarLight: a CubeSat X-ray Polarimeter based on the Gas Pixel Detector

Author

Feng, Hua, Jiang, Weichun, Minuti, Massimo, Wu, Qiong, Jung, Aera, Yang, Dongxin, Citraro, Saverio, Nasimi, Hikmat, Yu, Jiandong, Jin, Ge, Huang, Jiahui, Zeng, Ming, An, Peng, Baldini, Luca, Bellazzini, Ronaldo, Brez, Alessandro, Latronico, Luca, Sgrò, Carmelo, Spandre, Gloria, Pinchera, Michele, Muleri, Fabio, Soffitta, Paolo, and Costa, Enrico

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

The gas pixel detector (GPD) is designed and developed for high-sensitivity astronomical X-ray polarimetry, which is a new window about to open in a few years. Due to the small mass, low power, and compact geometry of the GPD, we propose a CubeSat mission Polarimeter Light (PolarLight) to demonstrate and test the technology directly in space. There is no optics but a collimator to constrain the field of view to 2.3 degrees. Filled with pure dimethyl ether (DME) at 0.8 atm and sealed by a beryllium window of 100 micron thick, with a sensitive area of about 1.4 mm by 1.4 mm, PolarLight allows us to observe the brightest X-ray sources on the sky, with a count rate of, e.g., ~0.2 counts/s from the Crab nebula. The PolarLight is 1U in size and mounted in a 6U CubeSat, which was launched into a low Earth Sun-synchronous orbit on October 29, 2018, and is currently under test. More launches with improved designs are planned in 2019. These tests will help increase the technology readiness for future missions such as the enhanced X-ray Timing and Polarimetry (eXTP), better understand the orbital background, and may help constrain the physics with observations of the brightest objects., Comment: Accepted for publication in Experimental Astronomy

Published
2019
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12. The Imaging X-Ray Polarimetry Explorer (IXPE): Technical Overview II

Author

O'Dell, Stephen L, Attin, Primo, Baldini, Luca, Barbanera, Mattia, Baumgartner, Wayne H, Bellazzini, Ronaldo, Bladt, Jeff, Bongiorno, Stephen D, Brez, Alessandro, Cavazzuti, Elisabetta, Citraro, Saverio, Costa, Enrico, Deininger, William D, Del Monte, Ettore, Dietz, Kurtis L, Di Lalla, Niccolò, Donnarumma, Immacolata, Elsner, Ronald F, Fabiani, Sergio, Ferrazzoli, Riccardo, Guy, Larry, Kalinowski, William, Kaspi, Victoria M, Kelley, Anthony R, Kolodziejczak, Jeffery J, Latronico, Luca, Lefevre, Carlo, Lucchesi, Leonardo, Manfreda, Alberto, Marshall, Herman L, Masciarelli, James, Matt, Giorgio, Minuti, Massimo, Muleri, Fabio, Nasimi, Hikmat, Nuti, Alessio, Orsini, Leonardo, Osborne, Darren, Perri, Matteo, Pesce-Rollins, Melissa, Peterson, Colin, Pinchera, Michele, Puccetti, Simonetta, Ramsey, Brian D, Ratheesh, Ajay, Romani, Roger W, Santoli, Francesco, Sciortino, Andrea, Sgr, Carmelo, Smith, Brian T, Spandre, Gloria, Soffitta, Paolo, Tennant, Allyn F, Tobia, Antonino, Trois, Alessio, Wedmore, Jeffrey, Weisskopf, Martin C, Xie, Fei, Zanetti, Francesco, Alexander, Cheryl, Allen, D. Zachery, Amici, Fabrizio, Antoniak, Spencer, Bonino, Raffaella, Borotto, Fabio, Breeding, Shawn, Brienza, Daniele, Bygott, H. Kyle, Caporale, Ciro, Cardelli, Claudia, Ceccanti, Marco, Centrone, Mauro, Di Persio, Giuseppe, Evangelista, Yuri, Ferrie, MacKenzie, Footdale, Joseph, Forsyth, Brent, Foster, Michelle, Gunji, Shuichi, Gurnee, Eli, Hibbard, Grant, Johnson, Sandra, Kelly, Eric, Kilaru, Kiranmayee, La Monaca, Fabio, Le Roy, Shelley, Loffredo, Pasqualino, Magazzu, Guido, Marengo, Marco, Marrocchesi, Alessandra, Massaro, Francesco, McCracken, Jeffrey, McEachen, Michael, Mereu, Paolo, Mitchell, Scott, Mitsuishi, Ikuyuki, Morbidini, Alfredo, Mosti, Federico, Negro, Michela, Oppedisano, Chiara, Pacheco, Richard, Paggi, Alessandro, Pavelitz, Steven D, Pentz, Christina, Piazzolla, Raffaele, Porter, Brad, Profeti, Alessandro, Ranganathan, Jaganathan, Rankin, John, Root, Noah, Rubini, Alda, Ruswick, Stephanie, Sanchez, Javier, Scalise, Emanuele, Schindhelm, Sarah, Speegle, Chet O, Tamagawa, Toru, Tardiola, Marcello, Walden, Amy L, Weddendorf, Bruce, and Welch, David

Subjects
Spacecraft Design, Testing And Performance
Abstract

The Imaging X-ray Polarimetry Explorer (IXPE) will add polarization to the properties (time, energy, and position) observed in x-ray astronomy. A NASA Astrophysics Small Explorer (SMEX) in partnership with the Italian Space Agency (ASI), IXPE will measure the 2–8-keV polarization of a few dozen sources during the first 2 years following its 2021 launch. The IXPE Observatory includes three identical x-ray telescopes, each comprising a 4-m-focal-length (grazingincidence) mirror module assembly (MMA) and a polarization-sensitive (imaging) detector unit (DU), separated by a deployable optical bench. The Observatory’s Spacecraft provides typical subsystems (mechanical, structural, thermal, power, electrical, telecommunications, etc.), an attitude determination and control subsystem for 3-axis stabilized pointing, and a command and data handling subsystem communicating with the science instrument and the Spacecraft subsystems.

Published
2019
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13. The Imaging X-ray Polarimetry Explorer (IXPE): Technical Overview

Author

O'Dell, Stephen L, Baldini, Luca, Bellazzini, Ronaldo, Costa, Enrico, Elsner, Ronald F, Kaspi, Victoria M, Kolodziejczak, Jeffery J, Latronico, Luca, Marshall, Herman L, Matt, Giorgio, Muleri, Fabio, Ramsey, Brian D, Romani, Roger W, Soffitta, Paolo, Tennant, Allyn F, Weisskopf, Martin C, Allen, D. Zachery, Amici, Fabrizio, Antonelli, L. Angelo, Antoniak, Spencer, Attina, Primo, Bachetti, Matteo, Barbanera, Mattia, Baumgartner, Wayne H, Bladt, Jeff, Bongiorno, Stephen D, Borotto, Fabio, Brez, Alessandro, Brooks, Thomas, Bussinger, Scott, Bygott, H. Kyle, Cavazzuti, Elisabetta, Ceccanti, Marco, Citraro, Saverio, Deininger, William D, Monte, Ettore Del, Dietz, Kurtis L, Lalla, Niccolò Di, Persio, Giuseppe Di, Donnarumma, Immacolata, Erickson, Jennifer, Evangelista, Yuri, Fabiani, Sergio, Ferrazzoli, Riccardo, Foster, Michelle, Giusti, Manuela, Gunji, Shuichi, Guy, Larry, Johnson, Sandra, Kalinowski, William, Kelley, Anthony R, Kilaru, Kiranmayee, Lefevre, Carlo, Maldera, Simone, Manfreda, Alberto, Marengo, Marco, Masciarelli, James, McEachen, Mike, Mereu, Paolo, Minuti, Massimo, Mitchell, Mark A, Mitchell, Scott, Mitsuishi, Ikuyuki, Morbidini, Alfredo, Mosti, Federico, Nasimi, Hikmat, Negri, Barbara, Orsini, Leonardo, Osborne, Darren, Pavelitz, Steven D, Pentz, Christina, Perri, Matteo, Pesce-Rollins, Melissa, Peterson, Colin, Piazzolla, Raffaele, Pieraccini, Stefano, Pilia, Maura, Pinchera, Michele, Puccetti, Simonetta, Ranganathan, Jaganathan, Read, Tim, Rubini, Alda, Santoli, Francesco, Sarra, Paolo, Schindhelm, Sarah, Sciortino, Andrea, Seckar, Chris, Sgr, Carmelo, Smith, Brian T, Spandre, Gloria, Speegle, Chet O, Tamagawa, Toru, Tardiola, Marcello, Tobia, Antonino, Tortosa, Alessia, Trois, Alessio, Weddendorf, Bruce, Wedmore, Jeff, and Zanetti, Davide

Subjects
Astronomy
Abstract

The Imaging X-ray Polarimetry Explorer (IXPE) will expand the information space for study of cosmic sources, by adding linear polarization to the properties (time, energy, and position) observed in x-ray astronomy. Selected in 2017 January as a NASA Astrophysics Small Explorer (SMEX) mission, IXPE will be launched into an equatorial orbit in 2021. The IXPE mission will provide scientifically meaningful measurements of the x-ray polarization of a few dozen sources in the 2-8 keV band, including polarization maps of several x-ray-bright extended sources and phase-resolved polarimetry of many bright pulsating x-ray sources.

Published
2018

14. X-Ray Polarimetry of the Accreting Pulsar 1A 0535+262 in the Supercritical State with PolarLight.

Author

Long, Xiangyun, Feng, Hua, Li, Hong, Kong, Ling-Da, Heyl, Jeremy, Ji, Long, Tao, Lian, Muleri, Fabio, Wu, Qiong, Zhu, Jiahuan, Huang, Jiahui, Minuti, Massimo, Jiang, Weichun, Citraro, Saverio, Nasimi, Hikmat, Yu, Jiandong, Jin, Ge, Zeng, Ming, An, Peng, and Baldini, Luca

Subjects
PULSARS, X-rays, POLARIMETRY
Abstract

The X-ray pulsar 1A 0535+262 exhibited a giant outburst in 2020, offering us a unique opportunity for X-ray polarimetry of an accreting pulsar in the supercritical state. Measurement with PolarLight yielded a nondetection in 3–8 keV; the 99% upper limit of the polarization fraction (PF) is found to be 0.34 averaged over spin phases, or 0.51 based on the rotating vector model. No useful constraint can be placed with phase-resolved polarimetry. These upper limits are lower than a previous theoretical prediction of 0.6–0.8, but consistent with those found in other accreting pulsars, like Her X-1, Cen X-3, 4U 1626−67, and GRO J1008−57, which were in the subcritical state, or at least not confidently in the supercritical state, during the polarization measurements. Our results suggest that the relatively low PF seen in accreting pulsars cannot be attributed to the source not being in the supercritical state, but could be a general feature. [ABSTRACT FROM AUTHOR]

Published
2023
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15. Calibration of the IXPE Focal Plane X-Ray Polarimeters to Polarized Radiation

Author

Di Marco, Alessandro, primary, Fabiani, Sergio, additional, La Monaca, Fabio, additional, Muleri, Fabio, additional, Rankin, John, additional, Soffitta, Paolo, additional, Xie, Fei, additional, Amici, Fabrizio, additional, attinà, Primo, additional, Bachetti, Matteo, additional, Baldini, Luca, additional, Barbanera, Mattia, additional, Baumgartner, Wayne, additional, Bellazzini, Ronaldo, additional, Borotto, Fabio, additional, Brez, Alessandro, additional, Brienza, Daniele, additional, Caporale, Ciro, additional, Cardelli, Claudia, additional, Carpentiero, Rita, additional, Castellano, Simone, additional, Castronuovo, Marco, additional, Cavalli, Luca, additional, Cavazzuti, Elisabetta, additional, Ceccanti, Marco, additional, Centrone, Mauro, additional, Citraro, Saverio, additional, Costa, Enrico, additional, D’Alba, Elisa, additional, D’Amico, Fabio, additional, Del Monte, Ettore, additional, Di Cosimo, Sergio, additional, Di Lalla, Niccolò, additional, Di Persio, Giuseppe, additional, Donnarumma, Immacolata, additional, Evangelista, Yuri, additional, Ferrazzoli, Riccardo, additional, Latronico, Luca, additional, Lefevre, Carlo, additional, Loffredo, Pasqualino, additional, Lorenzi, Paolo, additional, Lucchesi, Leonardo, additional, Magazzù, Carlo, additional, Magazzù, Guido, additional, Maldera, Simone, additional, Manfreda, Alberto, additional, Mangraviti, Elio, additional, Marengo, Marco, additional, Matt, Giorgio, additional, Mereu, Paolo, additional, Minuti, Massimo, additional, Morbidini, Alfredo, additional, Mosti, Federico, additional, Nasimi, Hikmat, additional, Negri, Barbara, additional, Nuti, Alessio, additional, O’Dell, Stephen L., additional, Orsini, Leonardo, additional, Perri, Matteo, additional, Pesce-Rollins, Melissa, additional, Piazzolla, Raffaele, additional, Pieraccini, Stefano, additional, Pilia, Maura, additional, Pinchera, Michele, additional, Profeti, Alessandro, additional, Puccetti, Simonetta, additional, Ramsey, Brian D., additional, Ratheesh, Ajay, additional, Rubini, Alda, additional, Santoli, Francesco, additional, Sarra, Paolo, additional, Scalise, Emanuele, additional, Sciortino, Andrea, additional, Sgrò, Carmelo, additional, Spandre, Gloria, additional, Tardiola, Marcello, additional, Tennant, Allyn F., additional, Tobia, Antonino, additional, Trois, Alessio, additional, Vimercati, Marco, additional, Weisskopf, Martin C., additional, Zanetti, Davide, additional, and Zanetti, Francesco, additional

Published
2022
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16. Imaging X-ray Polarimetry Explorer: prelaunch

Author

Weisskopf, Martin C., primary, Soffitta, Paolo, additional, Baldini, Luca, additional, Ramsey, Brian D., additional, O’Dell, Stephen L., additional, Romani, Roger W., additional, Matt, Giorgio, additional, Deininger, William D., additional, Baumgartner, Wayne H., additional, Bellazzini, Ronaldo, additional, Costa, Enrico, additional, Kolodziejczak, Jeffery J., additional, Latronico, Luca, additional, Marshall, Herman L., additional, Muleri, Fabio, additional, Bongiorno, Stephen D., additional, Tennant, Allyn, additional, Bucciantini, Niccolo, additional, Dovciak, Michal, additional, Marin, Frederic, additional, Marscher, Alan, additional, Poutanen, Juri, additional, Slane, Pat, additional, Turolla, Roberto, additional, Kalinowski, William, additional, Di Marco, Alessandro, additional, Fabiani, Sergio, additional, Minuti, Massimo, additional, La Monaca, Fabio, additional, Pinchera, Michele, additional, Rankin, John, additional, Sgro’, Carmelo, additional, Trois, Alessio, additional, Xie, Fei, additional, Alexander, Cheryl, additional, Allen, D. Zachery, additional, Amici, Fabrizio, additional, Andersen, Jason, additional, Antonelli, Angelo, additional, Antoniak, Spencer, additional, Attinà, Primo, additional, Barbanera, Mattia, additional, Bachetti, Matteo, additional, Baggett, Randy M., additional, Bladt, Jeff, additional, Brez, Alessandro, additional, Bonino, Raffaella, additional, Boree, Christopher, additional, Borotto, Fabio, additional, Breeding, Shawn, additional, Brienza, Daniele, additional, Bygott, H. Kyle, additional, Caporale, Ciro, additional, Cardelli, Claudia, additional, Carpentiero, Rita, additional, Castellano, Simone, additional, Castronuovo, Marco, additional, Cavalli, Luca, additional, Cavazzuti, Elisabetta, additional, Ceccanti, Marco, additional, Centrone, Mauro, additional, Citraro, Saverio, additional, D’Amico, Fabio, additional, D’Alba, Elisa, additional, Di Gesu, Laura, additional, Del Monte, Ettore, additional, Dietz, Kurtis L., additional, Di Lalla, Niccolo’, additional, Persio, Giuseppe Di, additional, Dolan, David, additional, Donnarumma, Immacolata, additional, Evangelista, Yuri, additional, Ferrant, Kevin, additional, Ferrazzoli, Riccardo, additional, Ferrie, MacKenzie, additional, Footdale, Joseph, additional, Forsyth, Brent, additional, Foster, Michelle, additional, Garelick, Benjamin, additional, Gunji, Shuichi, additional, Gurnee, Eli, additional, Head, Michael, additional, Hibbard, Grant, additional, Johnson, Samantha, additional, Kelly, Erik, additional, Kilaru, Kiranmayee, additional, Lefevre, Carlo, additional, Roy, Shelley Le, additional, Loffredo, Pasqualino, additional, Lorenzi, Paolo, additional, Lucchesi, Leonardo, additional, Maddox, Tyler, additional, Magazzu, Guido, additional, Maldera, Simone, additional, Manfreda, Alberto, additional, Mangraviti, Elio, additional, Marengo, Marco, additional, Marrocchesi, Alessandra, additional, Massaro, Francesco, additional, Mauger, David, additional, McCracken, Jeffrey, additional, McEachen, Michael, additional, Mize, Rondal, additional, Mereu, Paolo, additional, Mitchell, Scott, additional, Mitsuishi, Ikuyuki, additional, Morbidini, Alfredo, additional, Mosti, Federico, additional, Nasimi, Hikmat, additional, Negri, Barbara, additional, Negro, Michela, additional, Nguyen, Toan, additional, Nitschke, Isaac, additional, Nuti, Alessio, additional, Onizuka, Mitch, additional, Oppedisano, Chiara, additional, Orsini, Leonardo, additional, Osborne, Darren, additional, Pacheco, Richard, additional, Paggi, Alessandro, additional, Painter, Will, additional, Pavelitz, Steven D., additional, Pentz, Christina, additional, Piazzolla, Raffaele, additional, Perri, Matteo, additional, Pesce-Rollins, Melissa, additional, Peterson, Colin, additional, Pilia, Maura, additional, Profeti, Alessandro, additional, Puccetti, Simonetta, additional, Ranganathan, Jaganathan, additional, Ratheesh, Ajay, additional, Reedy, Lee, additional, Root, Noah, additional, Rubini, Alda, additional, Ruswick, Stephanie, additional, Sanchez, Javier, additional, Sarra, Paolo, additional, Santoli, Francesco, additional, Scalise, Emanuele, additional, Sciortino, Andrea, additional, Schroeder, Christopher, additional, Seek, Tim, additional, Sosdian, Kalie, additional, Spandre, Gloria, additional, Speegle, Chet O., additional, Tamagawa, Toru, additional, Tardiola, Marcello, additional, Tobia, Antonino, additional, Thomas, Nicholas E., additional, Valerie, Robert, additional, Vimercati, Marco, additional, Walden, Amy L., additional, Weddendorf, Bruce, additional, Wedmore, Jeffrey, additional, Welch, David, additional, Zanetti, Davide, additional, and Zanetti, Francesco, additional

Published
2022
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17. A Significant Detection of X-ray Polarization in Sco X-1 with PolarLight and Constraints on the Corona Geometry

Author

Long, Xiangyun, primary, Feng, Hua, additional, Li, Hong, additional, Zhu, Jiahuan, additional, Wu, Qiong, additional, Huang, Jiahui, additional, Minuti, Massimo, additional, Jiang, Weichun, additional, Yang, Dongxin, additional, Citraro, Saverio, additional, Nasimi, Hikmat, additional, Yu, Jiandong, additional, Jin, Ge, additional, Zeng, Ming, additional, An, Peng, additional, Jiang, Jiachen, additional, Costa, Enrico, additional, Baldini, Luca, additional, Bellazzini, Ronaldo, additional, Brez, Alessandro, additional, Latronico, Luca, additional, Sgrò, Carmelo, additional, Spandre, Gloria, additional, Pinchera, Michele, additional, Muleri, Fabio, additional, and Soffitta, Paolo, additional

Published
2022
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18. Discrimination of background events in the PolarLight X-ray polarimeter

Author

Zhu, Jiahuan, primary, Li, Hong, additional, Feng, Hua, additional, Huang, Jiahui, additional, Long, Xiangyun, additional, Wu, Qiong, additional, Jiang, Weichun, additional, Minuti, Massimo, additional, Citraro, Saverio, additional, Nasimi, Hikmat, additional, Yang, Dongxin, additional, Yu, Jiandong, additional, Jin, Ge, additional, Zeng, Ming, additional, An, Peng, additional, Baldini, Luca, additional, Bellazzini, Ronaldo, additional, Brez, Alessandro, additional, Latronico, Luca, additional, Sgrò, Carmelo, additional, Spandre, Gloria, additional, Pinchera, Michele, additional, Muleri, Fabio, additional, Soffitta, Paolo, additional, and Costa, Enrico, additional

Published
2021
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19. The Instrument of the Imaging X-Ray Polarimetry Explorer

Author

Soffitta, Paolo, primary, Baldini, Luca, additional, Bellazzini, Ronaldo, additional, Costa, Enrico, additional, Latronico, Luca, additional, Muleri, Fabio, additional, Del Monte, Ettore, additional, Fabiani, Sergio, additional, Minuti, Massimo, additional, Pinchera, Michele, additional, Sgro’, Carmelo, additional, Spandre, Gloria, additional, Trois, Alessio, additional, Amici, Fabrizio, additional, Andersson, Hans, additional, Attina’, Primo, additional, Bachetti, Matteo, additional, Barbanera, Mattia, additional, Borotto, Fabio, additional, Brez, Alessandro, additional, Brienza, Daniele, additional, Caporale, Ciro, additional, Cardelli, Claudia, additional, Carpentiero, Rita, additional, Castellano, Simone, additional, Castronuovo, Marco, additional, Cavalli, Luca, additional, Cavazzuti, Elisabetta, additional, Ceccanti, Marco, additional, Centrone, Mauro, additional, Ciprini, Stefano, additional, Citraro, Saverio, additional, D’Amico, Fabio, additional, D’Alba, Elisa, additional, Di Cosimo, Sergio, additional, Di Lalla, Niccolo’, additional, Di Marco, Alessandro, additional, Di Persio, Giuseppe, additional, Donnarumma, Immacolata, additional, Evangelista, Yuri, additional, Ferrazzoli, Riccardo, additional, Hayato, Asami, additional, Kitaguchi, Takao, additional, La Monaca, Fabio, additional, Lefevre, Carlo, additional, Loffredo, Pasqualino, additional, Lorenzi, Paolo, additional, Lucchesi, Leonardo, additional, Magazzu, Carlo, additional, Maldera, Simone, additional, Manfreda, Alberto, additional, Mangraviti, Elio, additional, Marengo, Marco, additional, Matt, Giorgio, additional, Mereu, Paolo, additional, Morbidini, Alfredo, additional, Mosti, Federico, additional, Nakano, Toshio, additional, Nasimi, Hikmat, additional, Negri, Barbara, additional, Nenonen, Seppo, additional, Nuti, Alessio, additional, Orsini, Leonardo, additional, Perri, Matteo, additional, Pesce-Rollins, Melissa, additional, Piazzolla, Raffaele, additional, Pilia, Maura, additional, Profeti, Alessandro, additional, Puccetti, Simonetta, additional, Rankin, John, additional, Ratheesh, Ajay, additional, Rubini, Alda, additional, Santoli, Francesco, additional, Sarra, Paolo, additional, Scalise, Emanuele, additional, Sciortino, Andrea, additional, Tamagawa, Toru, additional, Tardiola, Marcello, additional, Tobia, Antonino, additional, Vimercati, Marco, additional, and Xie, Fei, additional

Published
2021
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20. The Imaging X-Ray Polarimetry Explorer (IXPE): technical overview IV

Author

Ramsey, Brian D., primary, Attina, Primo, additional, Baldini, Luca, additional, Barbanera, Mattia, additional, Baumgartner, Wayne H., additional, Bellazzini, Ronaldo, additional, Bladt, Jeff, additional, Bongiorno, Stephen D., additional, brez, alessandro, additional, Castellano, Simone, additional, Carpentiero, Rita, additional, Castronuovo, Marco, additional, Cavalli, Luca, additional, Cavazutti, Elisabetta, additional, D'Amico, Fabio, additional, Citraro, Saverio, additional, Costa, Enrico, additional, Deininger, William D., additional, D'Alba, Elisa, additional, Delmonte, Ettore, additional, Dietz, Kurtis L., additional, Di Lalla, Niccolo, additional, Di Marco, Alessandro, additional, Di Persio, Giusseppe, additional, Donnarumma, Immacolata, additional, Fabiani, Sergio, additional, Ferrazzoli, Riccardo, additional, Footdale, Joseph, additional, Head, Michael, additional, Kalinowski, William, additional, Kolodziejczak, Jeffery J., additional, Latronico, Luca, additional, Lefevre, Carlo, additional, Lorenzi, Paolo, additional, Lucchesi, Leonardo, additional, Maldera, Simone, additional, Manfreda, Alberto, additional, Mangravati, Elio, additional, Marshall, Herman L., additional, Matt, Giorgio, additional, Minuti, Massimo, additional, Mize, Rondal, additional, Muleri, Fabio, additional, Nasimi, Hikmat, additional, Negri, Barbara, additional, Nuti, Alessio, additional, O'Dell, Stephen, additional, Orsini, Leonardo, additional, Osborne, Darren, additional, Pentz, Christina, additional, Pilia, Maura, additional, Perri, Matteo, additional, Pesce-Rollins, Melissa, additional, Peterson, Colin, additional, Pinchera, Michele, additional, Puccetti, Simonetta, additional, Rankin, John, additional, Ratheesh, Ajay, additional, Romani, Roger W., additional, Sarra, Paolo, additional, Santoli, Francesco, additional, Sciortino, Andrea, additional, Schroeder, Christopher, additional, Sgro, Carmelo, additional, Soffitta, Paolo, additional, Spandre, Gloria, additional, Tennant, Allyn F., additional, Tobia, Antonino, additional, Thomas, Nicholas E., additional, Trois, Alessio, additional, Vimercati, Marco, additional, Wedmore, Jeffery, additional, Weisskopf, Martin C., additional, Xie, Fei, additional, Zanetti, Francesco, additional, Alexander, Cheryl, additional, Allen, D.Zachery, additional, Amici, Fabrizio, additional, Andersen, Jason, additional, Antonelli, Angelo, additional, Antoniak, Spencer, additional, Bachetti, Matteo, additional, Baggett, Randy M., additional, Bonino, Rafaella, additional, Boree, Christopher, additional, Borotto, Fabio, additional, Breeding, Shawn, additional, Brienza, Daniele, additional, Byggott, H.Kyle, additional, Caporale, Ciro, additional, Cardelli, Claudia, additional, Ceccanti, Marco, additional, Centrone, Mauro, additional, Dolan, David, additional, Evangelista, Yuri, additional, Ferrant, Kevin, additional, Ferrie, MacKenzie, additional, Forsyth, Brent, additional, Foster, Michelle, additional, Garelick, Benjamin, additional, Gunji, Shuichi, additional, Gurnee, Eli, additional, Hibbard, Grant, additional, Johnson, Samantha, additional, Kelly, Eric, additional, Kilaru, Kiranmayee, additional, La Monaca, Fabio, additional, Le Roy, Shelley, additional, Lofredo, Pasqualino, additional, Maddox, Tyler, additional, Magazzu, Guido, additional, Marengo, Marco, additional, Marrocchesi, Alessandra, additional, Massaro, Francesco., additional, Mauger, David, additional, McCracken, Jeffrey, additional, McEachen, Michael, additional, Mereu, Paolo, additional, Mitchell, Scott, additional, Mitsuishi, Ikuyuki, additional, Morbidini, Alfredo, additional, Mosti, Federico, additional, Nguyen, Toan, additional, Negro, Michela, additional, Nitschke, Isaac, additional, Onizuka, Mitch, additional, Oppedisano, Chiara, additional, Pacheco, Richard, additional, Paggi, Alessandro, additional, Painter, Will, additional, Pavelitz, Steven D., additional, Piazzolla, Raffaele, additional, Profeti, Alessandro, additional, Ranganathan, Jaganathan, additional, Reedy, Lee, additional, Root, Noah, additional, Rubini, Alda, additional, Ruswick, Stephanie, additional, Sanchez, Javier, additional, Scalise, Emanuele, additional, Seek, Tim, additional, Sosdian, Kalie, additional, Speegle, Chet O., additional, Tamagawa, Toru, additional, Tardiola, Marcello, additional, Valerie, Robert, additional, Walden, Amy L., additional, Weddendorf, Bruce, additional, and Welch, David, additional

Published
2021
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21. X-Ray Polarimetry of the Crab Nebula with PolarLight: Polarization Recovery after the Glitch and a Secular Position Angle Variation

Author

Long, Xiangyun, primary, Feng, Hua, additional, Li, Hong, additional, Zhu, Jiahuan, additional, Wu, Qiong, additional, Huang, Jiahui, additional, Minuti, Massimo, additional, Jiang, Weichun, additional, Wang, Weihua, additional, Xu, Renxin, additional, Costa, Enrico, additional, Yang, Dongxin, additional, Citraro, Saverio, additional, Nasimi, Hikmat, additional, Yu, Jiandong, additional, Jin, Ge, additional, Zeng, Ming, additional, An, Peng, additional, Baldini, Luca, additional, Bellazzini, Ronaldo, additional, Brez, Alessandro, additional, Latronico, Luca, additional, Sgrò, Carmelo, additional, Spandre, Gloria, additional, Pinchera, Michele, additional, Muleri, Fabio, additional, and Soffitta, Paolo, additional

Published
2021
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22. Modeling the in-orbit Background of PolarLight

Author

Huang, Jiahui, primary, Feng, Hua, additional, Li, Hong, additional, Long, Xiangyun, additional, Yang, Dongxin, additional, Zeng, Weihe, additional, Wu, Qiong, additional, Jiang, Weichun, additional, Minuti, Massimo, additional, Costa, Enrico, additional, Muleri, Fabio, additional, Citraro, Saverio, additional, Nasimi, Hikmat, additional, Yu, Jiandong, additional, Jin, Ge, additional, Zeng, Zhi, additional, Zeng, Ming, additional, An, Peng, additional, Baldini, Luca, additional, Bellazzini, Ronaldo, additional, Brez, Alessandro, additional, Latronico, Luca, additional, Sgrò, Carmelo, additional, Spandre, Gloria, additional, Pinchera, Michele, additional, and Soffitta, Paolo, additional

Published
2021
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23. Outcomes of the IXPE instrument calibration

Author

Fabiani, Sergio, primary, Muleri, Fabio, additional, Di Marco, Alessandro, additional, La Monaca, Fabio, additional, Rankin, John, additional, Soffitta, Paolo, additional, Amici, Fabrizio, additional, Attina, Primo, additional, Baldini, Luca, additional, Barbanera, Mattia, additional, Brienza, Daniele, additional, Castellano, Simone, additional, Citraro, Saverio, additional, Costa, Enrico, additional, Evangelista, Yuri, additional, Del Monte, Ettore, additional, Di Cosimo, Sergio, additional, Di Persio, Giuseppe, additional, Ferrazzoli, Riccardo, additional, Lefevre, Carlo, additional, Loffredo, Pasqualino, additional, Lucchesi, Leonardo, additional, Manfreda, Alberto, additional, Tobia, Antonino, additional, Morbidini, Alfredo, additional, Minuti, Massimo, additional, Nasimi, Hikmat, additional, Nuti, Alessio, additional, Piazzolla, Raffaele, additional, Orsini, Leonardo, additional, Ratheesh, Ajay, additional, Pinchera, Michele, additional, Rubini, Alda, additional, Santoli, Francesco, additional, Scalise, Emanuele, additional, Sgrò, Carmelo, additional, Trois, Alessio, additional, and Xie, Fei, additional

Published
2021
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24. In-orbit operation and performance of the CubeSat Soft X-ray polarimeter PolarLight

Author

Li, Hong, primary, Long, Xiangyun, additional, Feng, Hua, additional, Wu, Qiong, additional, Huang, Jiahui, additional, Jiang, Weichun, additional, Minuti, Massimo, additional, Yang, Dongxin, additional, Citraro, Saverio, additional, Nasimi, Hikmat, additional, Yu, Jiandong, additional, Jin, Ge, additional, Zeng, Ming, additional, An, Peng, additional, Baldini, Luca, additional, Bellazzini, Ronaldo, additional, Brez, Alessandro, additional, Latronico, Luca, additional, Sgrò, Carmelo, additional, Spandre, Gloria, additional, Pinchera, Michele, additional, Muleri, Fabio, additional, Soffitta, Paolo, additional, and Costa, Enrico, additional

Published
2021
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25. The Imaging X-ray Polarimetry Explorer (IXPE): technical overview III

Author

Soffitta, Paolo, primary, Attina', Primo, additional, Baldini, Luca, additional, Barbanera, Mattia, additional, Baumgartner, Wayne H., additional, Bellazzini, Ronaldo, additional, Bladt, Jeff, additional, Bongiorno, Stephen D., additional, Brez, Alessandro, additional, Castellano, Simone, additional, Carpentiero, Rita, additional, Castronuovo, Marco, additional, Cavalli, Luca, additional, Cavazzuti, Elisabetta, additional, D' Amico, Fabio, additional, Citraro, Saverio, additional, Costa, Enrico, additional, Deininger, William D., additional, D' Alba, ELisa, additional, Del Monte, Ettore, additional, Diets, Kutis L., additional, Di Lalla, Niccolo', additional, Di Marco, Alessandro, additional, Di Persio, Guseppe, additional, Donnarumma, Immacolata, additional, Elsner, Ronald F., additional, Fabiani, Sergio, additional, Ferrazzoli, Riccardo, additional, Guy, Larry, additional, Kalinowski, William, additional, Kolodziejczak, Jeffery, additional, Latronico, Luca, additional, Lefevre, Carlo, additional, Lorenzi, Paolo, additional, Lucchesi, Leonardo, additional, Maldera, Simone, additional, Manfreda, Alberto, additional, Mangraviti, Elio, additional, Marshall, Herman L., additional, Masciarelli, James, additional, Matt, Giorgio, additional, Minuti, Massimo, additional, Muleri, Fabio, additional, Nasimi, Hikmat, additional, Negri, Barbara, additional, Nuti, Alessio, additional, Orsini, Leonardo, additional, Osborne, Darren, additional, Pilia, Maura, additional, Perri, Matteo, additional, Pesce-Rollins, Melissa, additional, Peterson, Colin, additional, Pinchera, Michele, additional, Puccetti, Simonetta, additional, Ramsey, Brian, additional, Ratheesh, Ajay, additional, Romani, Roger W., additional, Sarra, Paolo, additional, Santoli, Francesco, additional, Sciortino, Andrea, additional, Sgro', Carmelo, additional, Smith, Brian T., additional, Spandre, Gloria, additional, Tennant, Allyn F., additional, Tobia, Antonino, additional, Trois, Alessio, additional, Vimercati, Marco, additional, Wedmnore, Jeffrey, additional, Weisskopf, Martin C., additional, Xie, Fei, additional, Zanetti, Francesco, additional, Alexander, Cheryl, additional, Allen, D. Zachery, additional, Amici, Fabrizio, additional, Antonelli, L. Angelo, additional, Antoniak, Spencer, additional, Bachetti, Matteo, additional, Bonino, Raffaella, additional, Borotto, Fabio, additional, Breeding, Shawn, additional, Brienza, Daniele, additional, Bygott, H. Kyle, additional, Cardelli, Claudia, additional, Ceccanti, Marco, additional, Centrone, Mauro, additional, Evangelista, Yuri, additional, Ferrie, MacKenzie, additional, Forsyth, Brent, additional, Foster, Michele, additional, Gurnee, Eli, additional, Hibbard, Grant, additional, Johnson, Sandra R., additional, Kelly, Erik, additional, Kilaru, Kiranmayee, additional, La Monaca, Fabio, additional, Le Roy, Shelley, additional, Loffredo, Pasqualino, additional, Magazzu', Guido, additional, Marengo, Marco, additional, Marrocchesi, Alessandra, additional, Massaro, Francesco, additional, Morbidini, Alfredo, additional, McCracken, Jeffrey, additional, McEachen, Michael, additional, Mereu, Paolo, additional, Mitchell, Scott, additional, Mitsuishi, Ikuyuki, additional, Mosti, Federico, additional, Nigro, Michela, additional, Oppedisano, Chiara, additional, Pacheco, Richard, additional, Paggi, alessandro, additional, Pavelitz, Steven D., additional, Pentz, Cristina, additional, Piazzolla, Raffaele, additional, Porter, Brad, additional, Profeti, Alessandro, additional, Ranganathan, Jaganathan, additional, Rankin, John, additional, Root, Noah, additional, Rubini, Alda, additional, Ruswick, Stephanie, additional, Sanchez, Javier, additional, Scalise, Emanuele, additional, Schindhelm, Sara, additional, Speegle, Chet O., additional, Tamagawa, Toru, additional, Tardiola, Marcello, additional, Walden, Amy L., additional, Weddendorf, Bruce, additional, Welch, David, additional, Head, Michael, additional, Gray, Stuart, additional, Mize, Rondal, additional, O'Dell, Stephen L., additional, Schroeder, Christopher, additional, Thomas, Nicholas E., additional, Bagget, Randy M., additional, Dolan, David, additional, Ferrant, Kevin, additional, Footdale, Joseph, additional, Garelick, Benjamin, additional, Johnson, Samantha, additional, and Seek, Timothy, additional

Published
2020
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27. Author Correction: Re-detection and a possible time variation of soft X-ray polarization from the Crab

Author

Feng, Hua, primary, Li, Hong, additional, Long, Xiangyun, additional, Bellazzini, Ronaldo, additional, Costa, Enrico, additional, Wu, Qiong, additional, Huang, Jiahui, additional, Jiang, Weichun, additional, Minuti, Massimo, additional, Wang, Weihua, additional, Xu, Renxin, additional, Yang, Dongxin, additional, Baldini, Luca, additional, Citraro, Saverio, additional, Nasimi, Hikmat, additional, Soffitta, Paolo, additional, Muleri, Fabio, additional, Jung, Aera, additional, Yu, Jiandong, additional, Jin, Ge, additional, Zeng, Ming, additional, An, Peng, additional, Brez, Alessandro, additional, Latronico, Luca, additional, Sgro, Carmelo, additional, Spandre, Gloria, additional, and Pinchera, Michele, additional

Published
2020
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28. Re-detection and a possible time variation of soft X-ray polarization from the Crab

Author

Feng, Hua, primary, Li, Hong, additional, Long, Xiangyun, additional, Bellazzini, Ronaldo, additional, Costa, Enrico, additional, Wu, Qiong, additional, Huang, Jiahui, additional, Jiang, Weichun, additional, Minuti, Massimo, additional, Wang, Weihua, additional, Xu, Renxin, additional, Yang, Dongxin, additional, Baldini, Luca, additional, Citraro, Saverio, additional, Nasimi, Hikmat, additional, Soffitta, Paolo, additional, Muleri, Fabio, additional, Jung, Aera, additional, Yu, Jiandong, additional, Jin, Ge, additional, Zeng, Ming, additional, An, Peng, additional, Brez, Alessandro, additional, Latronico, Luca, additional, Sgro, Carmelo, additional, Spandre, Gloria, additional, and Pinchera, Michele, additional

Published
2020
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30. The Imaging X-Ray Polarimetry Explorer (IXPE): technical overview II

Author

O'Dell, Stephen L., primary, Attinà, Primo, additional, Baldini, Luca, additional, Barbanera, Mattia, additional, Baumgartner, Wayne H., additional, Bellazzini, Ronaldo, additional, Bladt, Jeff, additional, Bongiorno, Stephen D., additional, Brez, Alessandro, additional, Cavazzuti, Elisabetta, additional, Citraro, Saverio, additional, Costa, Enrico, additional, Deininger, William D., additional, Del Monte, Ettore, additional, Dietz, Kurtis L., additional, Di Lalla, Niccolò, additional, Donnarumma, Immacolata, additional, Elsner, Ronald F., additional, Fabiani, Sergio, additional, Ferrazzoli, Riccardo, additional, Guy, Larry, additional, Kalinowski, William, additional, Kaspi, Victoria M., additional, Kelley, Anthony R., additional, Kolodziejczak, Jeffrey J., additional, Latronico, Luca, additional, Lefevre, Carlo, additional, Lucchesi, Leonardo, additional, Manfreda, Alberto, additional, Marshall, Herman L., additional, Masciarelli, James, additional, Matt, Giorgio, additional, Minuti, Massimo, additional, Muleri, Fabio, additional, Nasimi, Hikmat, additional, Nuti, Alessio, additional, Orsini, Leonardo, additional, Osborne, Darren, additional, Perri, Matteo, additional, Pesce-Rollins, Melissa, additional, Peterson, Colin, additional, Pinchera, Michele, additional, Puccetti, Simonetta, additional, Ramsey, Brian D., additional, Ratheesh, Ajay, additional, Romani, Roger W., additional, Santoli, Francesco, additional, Sciortino, Andrea, additional, Sgrò, Carmelo, additional, Smith, Brian T., additional, Spandre, Gloria, additional, Soffitta, Paolo, additional, Tennant, Allyn F., additional, Tobia, Antonino, additional, Trois, Alessio, additional, Wedmore, Jeffrey, additional, Weisskopf, Martin C., additional, Xie, Fei, additional, Zanetti, Francesco, additional, Alexander, Cheryl D., additional, Allen, D Z., additional, Amici, Fabrizio, additional, Antoniak, Spencer, additional, Bonino, Raffaella, additional, Borotto, Fabio, additional, Breeding, Shawn P., additional, Brienza, Daniele, additional, Bygott, H K., additional, Caporale, Ciro, additional, Cardelli, Claudia, additional, Ceccanti, Marco, additional, Centrone, Mauro, additional, Di Persio, Giuseppe, additional, Evangelista, Yuri, additional, Ferrie, MacKenzie, additional, Footdale, Joseph, additional, Forsyth, Brent, additional, Foster, Michelle, additional, Gunji, Shuichi, additional, Gurnee, Eli, additional, Hibbard, Grant, additional, Johnson, Sandra R., additional, Kelly, Eric, additional, Kilaru, Kiranmayee, additional, La Monaca, Fabio, additional, Le Roy, Shelley, additional, Loffredo, Pasqualino, additional, Magazzu, Guido, additional, Marengo, Marco, additional, Marrocchesi, Alessandra, additional, Massaro, Francesco, additional, McCracken, Jeff, additional, McEachen, Michael, additional, Mereu, Paolo, additional, Mitchell, Scott, additional, Mitsuishi, Ikuyuki, additional, Morbidini, Alfredo, additional, Mosti, Federico, additional, Negro, Michela, additional, Oppedisano, Chiara, additional, Pacheco, Richard, additional, Paggi, Alessandro, additional, Pavelitz, Steven D., additional, Pentz, Christina, additional, Piazzola, Raffaele, additional, Porter, Brad, additional, Profeti, Alessandro, additional, Ranganathan, Jaganathan, additional, Rankin, John, additional, Root, Noah, additional, Rubini, Alda, additional, Ruswick, Stephanie, additional, Sanchez, Javier, additional, Scalise, Emanuele, additional, Schindhelm, Sarah, additional, Speegle, Chet O., additional, Tamagawa, Toru, additional, Tardiola, Marcello, additional, Walden, Amy L., additional, Weddendorf, Bruce, additional, and Welch, David, additional

Published
2019
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31. PolarLight: a CubeSat X-ray polarimeter based on the gas pixel detector

Author

Feng, Hua, primary, Jiang, Weichun, additional, Minuti, Massimo, additional, Wu, Qiong, additional, Jung, Aera, additional, Yang, Dongxin, additional, Citraro, Saverio, additional, Nasimi, Hikmat, additional, Yu, Jiandong, additional, Jin, Ge, additional, Huang, Jiahui, additional, Zeng, Ming, additional, An, Peng, additional, Baldini, Luca, additional, Bellazzini, Ronaldo, additional, Brez, Alessandro, additional, Latronico, Luca, additional, Sgrò, Carmelo, additional, Spandre, Gloria, additional, Pinchera, Michele, additional, Muleri, Fabio, additional, Soffitta, Paolo, additional, and Costa, Enrico, additional

Published
2019
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32. The Imaging X-ray Polarimetry Explorer (IXPE): technical overview

Author

O'Dell, Stephen L., primary, Baldini, Luca, primary, Bellazzini, Ronaldo, primary, Costa, Enrico, primary, Elsner, Ronald F., primary, Kaspi, Victoria M., primary, Kolodziejczak, Jeffery J., primary, Latronico, Luca, primary, Marshall, Herman L., primary, Matt, Giorgio, primary, Mulieri, Fabio, primary, Ramsey, Brian D., primary, Romani, Roger W., primary, Soffitta, Paolo, primary, Tennant, Allyn F., primary, Weisskopf, Martin C., primary, Sgrò, Carmelo, primary, Pesce-Rollins, Melissa, primary, Manfreda, Alberto, primary, Di Lalla, Niccolò, primary, Tamagawa, Toru, primary, Barbanera, Mattia, primary, Ceccanti, Marco, primary, Citraro, Saverio, primary, Minuti, Massimo, primary, Nasimi, Hikmat, primary, Orsini, Leonardo, primary, Pinchera, Michele, primary, Zanetti, Davide, primary, Borotto, Fabio, primary, Maldera, Simone, primary, Marengo, Marco, primary, Mereu, Paolo, primary, Mosti, Federico, primary, Tardiola, Marcello, primary, Deininger, William D., primary, Kalinowski, William, primary, Bladt, Jeff, primary, Wedmore, Jeff, primary, Pentz, Christina, primary, Read, Tim, primary, Guy, Larry, primary, McEachen, Mike, primary, Peterson, Colin, primary, Osborne, Darren, primary, Masciarelli, James, primary, Mitchell, Scott, primary, Smith, Brian T., primary, Antoniak, Spencer, primary, Johnson, Sandra, primary, Bussinger, Scott, primary, Bygott, Kyle, primary, Allen, Zachary, primary, Erickson, Jennifer, primary, Schindhelm, Sarah, primary, Seckar, Chris, primary, Amici, Fabrizio, primary, Attina, Primo, primary, Bachetti, Matteo, primary, Del Monte, Ettore, primary, Di Persio, Giuseppe, primary, Evangelista, Yuri, primary, Fabiani, Sergio, primary, Ferrazzoli, Riccardo, primary, Giusti, Manuela, primary, Lefevre, Carlo, primary, Morbidini, Alfredo, primary, Perri, Matteo, primary, Piazzolla, Raffaele, primary, Pilia, Maura, primary, Rubini, Alda, primary, Santoli, Francesco, primary, Tobia, Antonino, primary, Tortosa, Alessia, primary, Trois, Alessio, primary, Negri, Barbara, primary, Cavazzuti, Elisabetta, primary, Donnarumma, Immacolata, primary, Puccetti, Simonetta, primary, Pieraccini, Stefano, primary, Sarra, Paolo, primary, Sciortino, Andrea, primary, Baumgartner, Wayne H., primary, Bongiorno, Stephen D., primary, Mitsuishi, Ikuyuki, primary, Gunji, Shuichi, primary, Kilaru, Kiranmayee, primary, Speegle, Chet O., primary, Pavelitz, Steven D., primary, Ranganathan, Jaganathan, primary, Weddendorf, Bruce, primary, Brooks, Thomas, primary, Mitchell, Mark A., primary, Kelley, Anthony R., primary, Dietz, Kurtis L., primary, and Foster, Michele, primary

Published
2018
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34. The Imaging X-Ray Polarimetry Explorer (IXPE): technical overview IV

Author

Siegmund, Oswald H., Ramsey, Brian D., Attina, Primo, Baldini, Luca, Barbanera, Mattia, Baumgartner, Wayne H., Bellazzini, Ronaldo, Bladt, Jeff, Bongiorno, Stephen D., Brez, Alessandro, Castellano, Simone, Carpentiero, Rita, Castronuovo, Marco, Cavalli, Luca, Cavazutti, Elisabetta, D'Amico, Fabio, Citraro, Saverio, Costa, Enrico, Deininger, William D., D'Alba, Elisa, Delmonte, Ettore, Dietz, Kurtis L., Di Lalla, Niccolo, Di Marco, Alessandro, Di Persio, Giusseppe, Donnarumma, Immacolata, Fabiani, Sergio, Ferrazzoli, Riccardo, Footdale, Joseph, Head, Michael, Kalinowski, William, Kolodziejczak, Jeffery J., Latronico, Luca, Lefevre, Carlo, Lorenzi, Paolo, Lucchesi, Leonardo, Maldera, Simone, Manfreda, Alberto, Mangravati, Elio, Marshall, Herman L., Matt, Giorgio, Minuti, Massimo, Mize, Rondal, Muleri, Fabio, Nasimi, Hikmat, Negri, Barbara, Nuti, Alessio, O'Dell, Stephen, Orsini, Leonardo, Osborne, Darren, Pentz, Christina, Pilia, Maura, Perri, Matteo, Pesce-Rollins, Melissa, Peterson, Colin, Pinchera, Michele, Puccetti, Simonetta, Rankin, John, Ratheesh, Ajay, Romani, Roger W., Sarra, Paolo, Santoli, Francesco, Sciortino, Andrea, Schroeder, Christopher, Sgro, Carmelo, Soffitta, Paolo, Spandre, Gloria, Tennant, Allyn, Tobia, Antonino, Thomas, Nicholas E., Trois, Alessio, Vimercati, Marco, Wedmore, Jeffery, Weisskopf, Martin C., Xie, Fei, Zanetti, Francesco, Alexander, Cheryl, Allen, D. Zachery, Amici, Fabrizio, Andersen, Jason, Antonelli, Angelo, Antoniak, Spencer, Bachetti, Matteo, Baggett, Randy M., Bonino, Rafaella, Boree, Christopher, Borotto, Fabio, Breeding, Shawn, Brienza, Daniele, Byggott, H. Kyle, Caporale, Ciro, Cardelli, Claudia, Ceccanti, Marco, Centrone, Mauro, Dolan, David, Evangelista, Yuri, Ferrant, Kevin, Ferrie, MacKenzie, Forsyth, Brent, Foster, Michelle, Garelick, Benjamin, Gunji, Shuichi, Gurnee, Eli, Hibbard, Grant, Johnson, Samantha, Kelly, Eric, Kilaru, Kiranmayee, La Monaca, Fabio, Le Roy, Shelley, Lofredo, Pasqualino, Maddox, Tyler, Magazzu, Guido, Marengo, Marco, Marrocchesi, Alessandra, Massaro, Francesco, Mauger, David, McCracken, Jeffrey, McEachen, Michael, Mereu, Paolo, Mitchell, Scott, Mitsuishi, Ikuyuki, Morbidini, Alfredo, Mosti, Federico, Nguyen, Toan, Negro, Michela, Nitschke, Isaac, Onizuka, Mitch, Oppedisano, Chiara, Pacheco, Richard, Paggi, Alessandro, Painter, Will, Pavelitz, Steven D., Piazzolla, Raffaele, Profeti, Alessandro, Ranganathan, Jaganathan, Reedy, Lee, Root, Noah, Rubini, Alda, Ruswick, Stephanie, Sanchez, Javier, Scalise, Emanuele, Seek, Tim, Sosdian, Kalie, Speegle, Chet O., Tamagawa, Toru, Tardiola, Marcello, Valerie, Robert, Walden, Amy L., Weddendorf, Bruce, and Welch, David

Published
2021
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36. The Imaging X-Ray Polarimetry Explorer (IXPE): technical overview II

Author

Siegmund, Oswald H., O'Dell, Stephen L., Attinà, Primo, Baldini, Luca, Barbanera, Mattia, Baumgartner, Wayne H., Bellazzini, Ronaldo, Bladt, Jeff, Bongiorno, Stephen D., Brez, Alessandro, Cavazzuti, Elisabetta, Citraro, Saverio, Costa, Enrico, Deininger, William D., Del Monte, Ettore, Dietz, Kurtis L., Di Lalla, Niccolò, Donnarumma, Immacolata, Elsner, Ronald F., Fabiani, Sergio, Ferrazzoli, Riccardo, Guy, Larry, Kalinowski, William, Kaspi, Victoria M., Kelley, Anthony R., Kolodziejczak, Jeffrey J., Latronico, Luca, Lefevre, Carlo, Lucchesi, Leonardo, Manfreda, Alberto, Marshall, Herman L., Masciarelli, James, Matt, Giorgio, Minuti, Massimo, Muleri, Fabio, Nasimi, Hikmat, Nuti, Alessio, Orsini, Leonardo, Osborne, Darren, Perri, Matteo, Pesce-Rollins, Melissa, Peterson, Colin, Pinchera, Michele, Puccetti, Simonetta, Ramsey, Brian D., Ratheesh, Ajay, Romani, Roger W., Santoli, Francesco, Sciortino, Andrea, Sgrò, Carmelo, Smith, Brian T., Spandre, Gloria, Soffitta, Paolo, Tennant, Allyn F., Tobia, Antonino, Trois, Alessio, Wedmore, Jeffrey, Weisskopf, Martin C., Xie, Fei, Zanetti, Francesco, Alexander, Cheryl, Allen, D. Zachery, Amici, Fabrizio, Antoniak, Spencer, Bonino, Raffaella, Borotto, Fabio, Breeding, Shawn, Brienza, Daniele, Bygott, H. Kyle, Caporale, Ciro, Cardelli, Claudia, Ceccanti, Marco, Centrone, Mauro, Di Persio, Giuseppe, Evangelista, Yuri, Ferrie, MacKenzie, Footdale, Joseph, Forsyth, Brent, Foster, Michelle, Gunji, Shuichi, Gurnee, Eli, Hibbard, Grant, Johnson, Sandra, Kelly, Eric, Kilaru, Kiranmayee, La Monaca, Fabio, Le Roy, Shelley, Loffredo, Pasqualino, Magazzu, Guido, Marengo, Marco, Marrocchesi, Alessandra, Massaro, Francesco, McCracken, Jeffery, McEachen, Michael, Mereu, Paolo, Mitchell, Scott, Mitsuishi, Ikuyuki, Morbidini, Alfredo, Mosti, Federico, Negro, Michela, Oppedisano, Chiara, Pacheco, Richard, Paggi, Alessandro, Pavelitz, Steven D., Pentz, Christina, Piazzola, Raffaele, Porter, Brad, Profeti, Alessandro, Ranganathan, Jaganathan, Rankin, John, Root, Noah, Rubini, Alda, Ruswick, Stephanie, Sanchez, Javier, Scalise, Emanuele, Schindhelm, Sarah, Speegle, Chet O., Tamagawa, Toru, Tardiola, Marcello, Walden, Amy L., Weddendorf, Bruce, and Welch, David

Published
2019
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37. The ATLAS fast tracker processor design

Author

Volpi, Guido, primary, Adelman, Jahred, additional, Albicocco, Pietro, additional, Alison, John, additional, Ancu, Lucian Stefan, additional, Anderson, James, additional, Andari, Nansi, additional, Andreani, Alessandro, additional, Andreazza, Attilio, additional, Annovi, Alberto, additional, Antonelli, Mario, additional, Asbah, Needa, additional, Atkinson, Markus, additional, Baines, J., additional, Barberio, Elisabetta, additional, Beccherle, Roberto, additional, Beretta, Matteo, additional, Biesuz, Nicolo Vladi, additional, Blair, R.E., additional, BOGDAN, Mircea, additional, Boveia, Antonio, additional, Britzger, Daniel, additional, Bryant, Partick, additional, Burghgrave, Blake., additional, Calderini, Giovanni, additional, Camplani, Alessandra, additional, Cavaliere, Viviana, additional, Cavasinni, Vincenzo, additional, CHAKRABORTY, Dhiman, additional, Chang, Philip, additional, Cheng, Yangyang, additional, Citraro, Saverio, additional, Citterio, Mauro, additional, Crescioli, Francesco, additional, Dawe, Noel, additional, Dell'Orso, Mauro, additional, Donati, Simone, additional, Dondero, Paolo, additional, Drake, G., additional, Gadomski, Szymon, additional, Gatta, Mauro, additional, GENTSOS, Christos, additional, Giannetti, Paola, additional, Gkaitatzis, Stamatios, additional, Gramling, Johanna, additional, Howarth, James William, additional, Iizawa, Tomoya, additional, Ilic, Nikolina, additional, Jiang, Zihao, additional, Kaji, Toshiaki, additional, Kasten, Michael, additional, Kawaguchi, Yoshimasa, additional, Kim, Young Kee, additional, Kimura, Naoki, additional, Klimkovich, Tatsiana, additional, Kolb, Mathis, additional, Kordas, K., additional, Krizka, Karol, additional, Kubota, T., additional, Lanza, Agostino, additional, Li, Ho Ling, additional, Liberali, Valentino, additional, Lisovyi, Mikhaylo, additional, Liu, Lulu, additional, Love, Jeremy, additional, LUCIANO, Pierluigi, additional, Luongo, Carmela, additional, Magalotti, Daniel, additional, Maznas, Ioannis, additional, Meroni, Chiara, additional, Mitani, Takashi, additional, Nasimi, Hikmat, additional, Negri, Andrea, additional, Neroutsos, Panos, additional, Neubauer, Mark, additional, Nikolaidis, Spiridon, additional, Okumura, Y., additional, Pandini, Carlo, additional, Petridou, Chariclia, additional, Piendibene, Marco, additional, Proudfoot, James, additional, Rados, Petar Kevin, additional, Roda, Chiara, additional, Rossi, Enrico, additional, Sakurai, Yuki, additional, Sampsonidis, Dimitrios, additional, SAXON, James, additional, Schmitt, Stefan, additional, Schoening, Andre, additional, Shochet, Mel, additional, Shoijaii, Jafar, additional, Soltveit, Hans Kristian, additional, SOTIROPOULOU, Calliope-louisa, additional, Stabile, Alberto, additional, Swiatlowski, Maximilian J, additional, Tang, Fukun, additional, Taylor, Pierre Thor Elliot, additional, Testa, Marianna, additional, Tompkins, Lauren, additional, Vercesi, V., additional, Wang, Rui, additional, Watari, Ryutaro, additional, Zhang, Jianhong, additional, Zeng, Jian Cong, additional, Zou, Rui, additional, and Bertolucci, Federico, additional

Published
2015
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39. The Imaging X-ray Polarimetry Explorer (IXPE): technical overview III

Author

Soffitta, Paolo, Primo Attinà, Baldini, Luca, Barbanera, Mattia, Baumgartner, Wayne H., Bellazzini, Ronaldo, Bladt, Jeff, Bongiorno, Stephen D., Brez, Alessandro, Castellano, Simone, Carpentiero, Rita, Castronuovo, Marco, Cavalli, Luca, Cavazzuti, Elisabetta, D Amico, Fabio, Citraro, Saverio, Costa, Enrico, Deininger, William D., D Alba, Elisa, Del Monte, Ettore, Diets, Kutis L., Di Lalla, Niccolo, Di Marco, Alessandro, Di Persio, Guseppe, Donnarumma, Immacolata, Elsner, Ronald F., Fabiani, Sergio, Ferrazzoli, Riccardo, Guy, Larry, Kalinowski, William, Kolodziejczak, Jeffery, Latronico, Luca, Lefevre, Carlo, Lorenzi, Paolo, Lucchesi, Leonardo, Maldera, Simone, Manfreda, Alberto, Mangraviti, Elio, Marshall, Herman L., Masciarelli, James, Matt, Giorgio, Minuti, Massimo, Muleri, Fabio, Nasimi, Hikmat, Negri, Barbara, Nuti, Alessio, Orsini, Leonardo, Osborne, Darren, Pilia, Maura, Perri, Matteo, Pesce-Rollins, Melissa, Peterson, Colin, Pinchera, Michele, Puccetti, Simonetta, Ramsey, Brian, Ratheesh, Ajay, Romani, Roger W., Sarra, Paolo, Santoli, Francesco, Sciortino, Andrea, Sgro, Carmelo, Smith, Brian T., Spandre, Gloria, Tennant, Allyn F., Tobia, Antonino, Trois, Alessio, Vimercati, Marco, Wedmnore, Jeffrey, Weisskopf, Martin C., Xie, Fei, Zanetti, Francesco, Alexander, Cheryl, Allen, D. Zachery, Amici, Fabrizio, Antonelli, L. Angelo, Antoniak, Spencer, Bachetti, Matteo, Bonino, Raffaella, Borotto, Fabio, Breeding, Shawn, Brienza, Daniele, Bygott, H. Kyle, Cardelli, Claudia, Ceccanti, Marco, Centrone, Mauro, Evangelista, Yuri, Ferrie, Mackenzie, Forsyth, Brent, Foster, Michele, Gurnee, Eli, Hibbard, Grant, Johnson, Sandra R., Kelly, Erik, Kilaru, Kiranmayee, La Monaca, Fabio, Le Roy, Shelley, Loffredo, Pasqualino, Magazzu, Guido, Marengo, Marco, Marrocchesi, Alessandra, Massaro, Francesco, Morbidini, Alfredo, Mccracken, Jeffrey, Mceachen, Michael, Mereu, Paolo, Mitchell, Scott, Mitsuishi, Ikuyuki, Mosti, Federico, Nigro, Michela, Oppedisano, Chiara, Pacheco, Richard, Paggi, Alessandro, Pavelitz, Steven D., Pentz, Cristina, Piazzolla, Raffaele, Porter, Brad, Profeti, Alessandro, Ranganathan, Jaganathan, Rankin, John, Root, Noah, Rubini, Alda, Ruswick, Stephanie, Sanchez, Javier, Scalise, Emanuele, Schindhelm, Sara, Speegle, Chet O., Tamagawa, Toru, Tardiola, Marcello, Walden, Amy L., Weddendorf, Bruce, Welch, David, Head, Michael, Gray, Stuart, Mize, Rondal, O, Stephen L., Schroeder, Christopher, Thomas, Nicholas E., Bagget, Randy M., Dolan, David, Ferrant, Kevin, Footdale, Joseph, Garelick, Benjamin, Johnson, Samantha, and Seek, Timothy

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