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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/32114
Title: A Weighted Analysis to Improve the X-Ray Polarization Sensitivity of the Imaging X-ray Polarimetry Explorer
Authors: DI MARCO, ALESSANDRO
COSTA, ENRICO 
MULERI, FABIO 
SOFFITTA, PAOLO 
FABIANI, Sergio 
LA MONACA, Fabio 
RANKIN, JOHN 
XIE, FEI 
BACHETTI, Matteo 
Baldini, Luca
Baumgartner, Wayne
Bellazzini, Ronaldo
Brez, Alessandro
Castellano, Simone
DEL MONTE, Ettore 
Di Lalla, Niccolò
FERRAZZOLI, RICCARDO 
Latronico, Luca
Maldera, Simone
Manfreda, Alberto
O'Dell, Stephen L.
PERRI, Matteo 
Pesce-Rollins, Melissa
Puccetti, Simonetta
Ramsey, Brian D.
RATHEESH, AJAY 
Sgrò, Carmelo
Spandre, Gloria
Tennant, Allyn F.
TOBIA, ANTONINO 
TROIS, ALESSIO 
Weisskopf, Martin C.
Issue Date: 2022
Journal: THE ASTRONOMICAL JOURNAL 
Number: 163
Issue: 4
First Page: 170
Abstract: Imaging X-ray Polarimetry Explorer (IXPE) is a Small Explorer mission that was launched at the end of 2021 to measure the polarization of X-ray emission from tens of astronomical sources. Its focal-plane detectors are based on the Gas Pixel Detector, which measures the polarization by imaging photoelectron tracks in a gas mixture and reconstructing their initial directions. The quality of the single track, and then the capability of correctly determining the original direction of the photoelectron, depends on many factors, e.g., whether the photoelectron is emitted at low or high inclination with respect to the collection plane or the occurrence of a large Coulomb scattering close to the generation point. The reconstruction algorithm used by IXPE to obtain the photoelectron emission direction also calculates several properties of the shape of the tracks that characterize the process. In this paper we compare several such properties and identify the best one to weight each track on the basis of the reconstruction accuracy. We demonstrate that significant improvement in sensitivity can be achieved with this approach and for this reason it will be the baseline for IXPE data analysis.
URI: http://hdl.handle.net/20.500.12386/32114
URL: https://api.elsevier.com/content/abstract/scopus_id/85126711185
https://iopscience.iop.org/article/10.3847/1538-3881/ac51c9
ISSN: 0004-6256
DOI: 10.3847/1538-3881/ac51c9
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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