Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Joanne E. Hill"'
Autor:
Wataru Iwakiri, Kevin Black, Teruaki Enoto, Toru Tamagawa, Yuanhui Zhou, A. Hayato, Marina Tsutsumi, Takao Kitaguchi, Tomoshi Takeda, Keith Jahoda, Miho Okubo, Yuto Yoshida, Keisuke Uchiyama, Joanne E. Hill
Publikováno v:
Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray.
We present the first application of a time projection chamber polarimeter to measure high energy X-ray polarization above 10 keV. The polarimeter is designed based on the PRAXyS soft X-ray polarimeter. The sealed gas is changed to a gas mixture of 60
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85e6d18f7926f62602045a2ab896debf
https://doi.org/10.1117/12.2561313
https://doi.org/10.1117/12.2561313
Autor:
Joanne E. Hill, Bonnie Pang
Publikováno v:
Sport, Education and Society. 23:773-785
Social media are influential sociocultural forces that construct and transmit information about gender, health and bodies to young people in the digital age. In health and physical activity, Chines...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00a19c35fd3d41d0eefabd68b5875cb4
https://doi.org/10.1080/13573322.2018.1489226
https://doi.org/10.1080/13573322.2018.1489226
Autor:
Tsunefumi Mizuno, Yasushi Fukazawa, Takao Kitaguchi, Philip Kaaret, Asami Hayato, Kevin Black, Toshio Nakano, Ross McCurdy, Wataru Iwakiri, Toru Tamagawa, Joanne E. Hill, Teruaki Enoto, Keith Jahoda
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 880:188-193
We present a data processing algorithm for angular reconstruction and event selection applied to 2-D photoelectron track images from X-ray polarimeters. The method reconstructs the initial emission angle of a photoelectron from the initial portion of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b8999f7bfb463298ceba7c505cc410c
https://doi.org/10.1016/j.nima.2017.10.070
https://doi.org/10.1016/j.nima.2017.10.070
Autor:
Tsunefumi Mizuno, Teruaki Enoto, Takao Kitaguchi, Joanne E. Hill, Kevin Black, Wataru Iwakiri, Asami Hayato, Toru Tamagawa, Philip Kaaret
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 942:162389
This paper presents a data processing algorithm with machine learning for polarization extraction and event selection applied to photoelectron track images taken with X-ray polarimeters. The method uses a convolutional neural network (CNN) classifica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26070514421e42fa78cf288a75a891b1
https://doi.org/10.1016/j.nima.2019.162389
https://doi.org/10.1016/j.nima.2019.162389
Autor:
Chryssa Kouveliotou, Timothy R. Kallman, Craig B. Markwardt, Robert Petre, Jeremy D. Schnittman, Yang Soong, Takashi Okajima, Tod E. Strohmayer, Yuzuru Tawara, P. Kaaret, Joanne E. Hill, J. Kevin Black, Keith Jahoda, Toru Tamagawa, Lorella Angelini, Theodore Jaeger
Publikováno v:
SPIE Proceedings.
The Polarimeter for Relativistic Astrophysical X-ray Sources (PRAXyS) is one of three Small Explorer (SMEX) missions selected by NASA for Phase A study, with a launch date in 2020. The PRAXyS Observatory exploits grazing incidence X-ray mirrors and T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de486ec4885f2b74223273f9620efa70
https://doi.org/10.1117/12.2234220
https://doi.org/10.1117/12.2234220
Autor:
Drew M. Miles, Wataru Iwakiri, L. Olsen, Ross McCurdy, David S. Nolan, S. J. Mosely, P. Kaaret, Toru Tamagawa, Joanne E. Hill, Leroy Sparr, Megu Kubota, Yang Soong, J. K. Black, Takao Kitaguchi, Keith Jahoda, Takashi Okajima
Publikováno v:
SPIE Proceedings.
The Polarimeter for Relativistic Astrophysical X-ray Sources (PRAXyS) is one of three Small Explorer (SMEX) missions selected by NASA for Phase A study. The PRAXyS observatory carries an X-ray Polarimeter Instrument (XPI) capable of measuring the lin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a06fba655bbb99a207b53c2b820c46e
https://doi.org/10.1117/12.2233322
https://doi.org/10.1117/12.2233322
Publikováno v:
SPIE Proceedings.
A fundamental challenge in a spaceborne application of a gas-based Time Projection Chamber (TPC) for observation of X-ray polarization is handling the large amount of data collected. The TPC polarimeter described uses the APV-25 Application Specific
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac8f7697d095d14a9b1e450a69fa9e2a
https://doi.org/10.1117/12.2222800
https://doi.org/10.1117/12.2222800
Autor:
J. Kevin Black, Joanne E. Hill, Michael Hosack, Albert Y. Shih, Keith Jahoda, Brian R. Dennis, Christian E. Urba, A. Gordon Emslie, P. Deines-Jones
Publikováno v:
Experimental Astronomy. 32:101-125
We describe the design of a balloon-borne Imaging X-ray Polarimeter for Solar flares (IX PS). This novel instrument, a Time Projection Chamber (TPC) for photoelectric polarimetry, will be capable of measuring polarization at the few percent level in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f8d978cb0f8c6deec8e7fc6ed28ffe0
https://doi.org/10.1007/s10686-011-9254-1
https://doi.org/10.1007/s10686-011-9254-1
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 581:755-760
The micropattern time projection chamber (TPC) offers a novel method of imaging the tracks of photoelectrons as a means of X-ray polarimetry with the potential to simultaneously achieve large modulation factors and high quantum efficiency. Measuremen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72ccb95a99fbe60264e2caf79b32fc2d
https://doi.org/10.1016/j.nima.2007.08.144
https://doi.org/10.1016/j.nima.2007.08.144
Autor:
A. P. Beardmore, Bing Zhang, Shiho Kobayashi, V. La Parola, F. E. Marshall, David N. Burrows, M. Capalbi, J. P. Osborne, P. T. O'Brien, M. R. Goad, Olivier Godet, Joanne E. Hill, K. L. Page, Alan A. Wells
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 374:1473-1478
We describe observations of GRB 050422, a Swift-discovered gamma-ray burst. The prompt gamma-ray emission had a T90 duration of 59 s and was multipeaked, with the main peak occurring at T + 53 s. Swift was able to follow the X-ray afterglow within 10
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::246b41ac8e73eacaf40f836a144c236a
https://doi.org/10.1111/j.1365-2966.2006.11249.x
https://doi.org/10.1111/j.1365-2966.2006.11249.x