Change search
ReferencesLink to record
Permanent link

Direct link
The PoGOLite Star Tracker System
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
2009 (English)In: 2008 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (2008 NSS/MIC), 2009, 765-767 p.Conference paper (Refereed)
Abstract [en]

PoGOLite is a balloon-borne experiment which will study polarised soft gamma-ray emission from astrophysical targets in the 25keV - 80keV energy range by applying well-type phoswich detector technology [1]. Polarised gamma-rays are expected from a wide variety of sources including rotation-powered pulsars, accreting black holes and neutron stars, and jet-dominated active galaxies. Polarization measurements provide a powerful probe of the gamma-ray emission mechanism and the distribution of magnetic and radiation fields around the source. The polarization is determined using Compton scattering and photoelectric absorption in an array of 217 plastic scintillators. The PoGOLite polarimeter has a field of view of 2.4 degrees x 2.4 degrees and must be kept aligned to objects of interest on the sky within 5% of the FOV to secure a minimum detectable polarization MDP=10% for a 200 mCrab source. This alignment can be obtained by mean of different attitude sensors: a DGPS (Differential Global Positioning System), two star trackers and gyroscopes. The most accurate sensor is the star tracker which is the focus of this paper. Preliminary studies [2] and calibration have been made which pave the way to an autonomous star tracking device which together with the other attitude control devices will reconstruct the pointing solution.

Place, publisher, year, edition, pages
2009. 765-767 p.
Keyword [en]
Active - galaxies, Attitude sensors, Balloon-borne experiment, Black holes, Energy ranges, Field of views, Gamma-ray emission, Neutron stars, Phoswich detector, Photoelectric absorption, Plastic scintillator, Polarization measurements, Positioning system, Radiation field, Star tracker, Star tracking, Compton scattering, Flight dynamics, Galaxies, Polarization, Scintillation counters, Sensors, Stars
National Category
Subatomic Physics
URN: urn:nbn:se:kth:diva-30733DOI: 10.1109/NSSMIC.2008.4774604ISI: 000268656000009ScopusID: 2-s2.0-67649222534ISBN: 978-1-4244-2714-7OAI: diva2:401987
IEEE Nuclear Science Symposium/Medical Imaging Conference, Dresden, GERMANY, OCT 19-25, 2008
QC 20110304Available from: 2011-03-04 Created: 2011-03-04 Last updated: 2011-03-04Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Marini Bettolo, Cecilia
By organisation
Particle and Astroparticle Physics
Subatomic Physics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 24 hits
ReferencesLink to record
Permanent link

Direct link