Gamma-Ray Burst Polarimeter aboard IKAROS

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3509271· OSTI ID:21439590

Murakami, T; Yonetoku, D; Sakashita, T; Morihara, Y; Kikuchi, Y ^[1]; Gunji, S; Tokairin, N ^[2]; Mihara, T ^[3]

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1. Kanazawa University, Kanazawa, Ishikawa 920-1192 (Japan)
2. Yamagata University, Kojirokawa, Yamagata 990-8560 (Japan)
3. RIKEN, Wako, Saitama 351-0198 (Japan)

A GRB polarimeter was launched by H-IIA on 21 May in 2010 at JAXA Tanegashima Space Center. A GRB polarization is the best key to understand mechanism of GRB prompt emissions and also to understand the geometry of magnetic fields. The standard GRB fireball models predict the synchrotron radiation of them, thus a high degree of polarization is expected, if the magnetic field-lines are coaligned. Previously, a few of the GRB polarization detections were reported. Although they used the Compton scattering method, but their measurements were non-coincidence mode. This made their reports were somewhat unclear. This time, our detector works fully in the coincidence mode to avoid the confusion. On 21 June, GAP is switched on and the first GRB was detected on 7 July but not yet well calibrated.

• OSTI ID: 21439590
• Journal Information: AIP Conference Proceedings, Vol. 1279, Issue 1; Conference: Conference on deciphering the ancient universe with gamma-ray bursts, Kyoto (Japan), 19-23 Apr 2010; Other Information: DOI: 10.1063/1.3509271; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTROPHYSICS
COMPTON EFFECT
COSMIC GAMMA BURSTS
FIREBALL MODEL
GAMMA ASTRONOMY
INTERSTELLAR MAGNETIC FIELDS
PHOTON EMISSION
POLARIMETERS
POLARIZATION
SYNCHROTRON RADIATION
ASTRONOMY
BASIC INTERACTIONS
BREMSSTRAHLUNG
COSMIC RADIATION
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
EMISSION
INTERACTIONS
IONIZING RADIATIONS
MAGNETIC FIELDS
MATHEMATICAL MODELS
PARTICLE MODELS
PHYSICS
PRIMARY COSMIC RADIATION
RADIATIONS
SCATTERING