CAMELOT: Design and performance verification of the detector concept and localization capability

Masanori Ohno, Norbert Werner, András Pál, Jakub Řípa, Gabór Galgóczi, Norbert Tarcai, Zsolt Várhegyi, Yasushi Fukazawa, Tsunefumi Mizuno, Hiromitsu Takahashi, Koji Tanaka, Nagomi Uchida, Kento Torigoe, Kazuhiro Nakazawa, Teruaki Enoto, Hirokazu Odaka, Yuto Ichinohe, Z. Frei, László Kiss

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


A fleet of nanosatellites using precise timing synchronization provided by the Global Positioning System is a new concept for monitoring the gamma-ray sky that can achieve both all-sky coverage and good localization accuracy. We are proposing this new concept for the mission CubeSats Applied for MEasuring and LOcalising Transients (CAMELOT). The differences in photon arrival times at each satellite are to be used for source localization. Detectors with good photon statistics and the development of a localization algorithm capable of handling a large number of satellites are both essential for this mission. Large, thin CsI scintillator plates are the current candidates for the detectors because of their high light yields. It is challenging to maximize the light-collection efficiency and to understand the position dependence of such thin plates. We have found a multi-channel readout that uses the coincidence technique to be very effective in increasing the light output while keeping a similar noise level to that of a single channel readout. Based on such a detector design, we have developed a localization algorithm for this mission and have found that we can achieve a localization accuracy better than 20 arc minutes and a rate of about 10 short gamma-ray bursts per year.

Original languageEnglish
Title of host publicationSpace Telescopes and Instrumentation 2018
Subtitle of host publicationUltraviolet to Gamma Ray
EditorsShouleh Nikzad, Jan-Willem A. Den Herder, Kazuhiro Nakazawa
ISBN (Print)9781510619517
Publication statusPublished - Jan 1 2018
EventSpace Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray - Austin, United States
Duration: Jun 10 2018Jun 15 2018


OtherSpace Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray
CountryUnited States



  • gamma-ray bursts
  • localization
  • nanosatellites
  • scintillators

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Ohno, M., Werner, N., Pál, A., Řípa, J., Galgóczi, G., Tarcai, N., Várhegyi, Z., Fukazawa, Y., Mizuno, T., Takahashi, H., Tanaka, K., Uchida, N., Torigoe, K., Nakazawa, K., Enoto, T., Odaka, H., Ichinohe, Y., Frei, Z., & Kiss, L. (2018). CAMELOT: Design and performance verification of the detector concept and localization capability. In S. Nikzad, J-W. A. Den Herder, & K. Nakazawa (Eds.), Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray (Vol. 10699). [1069964] SPIE.