The LOFT Burst Alert System and its Burst On-board Trigger

Stephane Schanne, Diego Götz, Herve Le Provost, Frederic Château, Enrico Bozzo, Søren Brandt

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


The ESA M3 candidate mission LOFT (Large Observatory For x-ray Timing) has been designed to study strong gravitational fields by observing compact objects, such as black-hole binaries or neutron-star systems and supermassive black-holes, based on the temporal analysis of photons collected by the primary instrument LAD (Large Area Detector), sensitive to X-rays from 2 to 50 keV, offering a very large effective area (>10 m 2 ), but a small field of view ({\o}{\pi} sr), the WFM actually detects all types of transient sources, including Gamma-Ray Bursts (GRBs), which are of primary interest for a world-wide observers community. However, observing the quickly decaying GRB afterglows with ground-based telescopes needs the rapid knowledge of their precise localization. The task of the Loft Burst Alert System (LBAS) is therefore to detect in near- real-time GRBs (about 120 detections expected per year) and other transient sources, and to deliver their localization in less than 30 seconds to the observers, via a VHF antenna network. Real-time full resolution data download to ground being impossible, the real-time data processing is performed onboard by the LBOT (LOFT Burst On-board Trigger system). In this article we present the LBAS and its components, the LBOT and the associated ground-segment.
Original languageEnglish
Title of host publicationSpace Telescopes and Instrumentation 2014 : Ultraviolet to Gamma Ray
EditorsTadayuki Takahashi, Jan-Willem A. der Herder, Mark Bautz
Number of pages8
PublisherSPIE - International Society for Optical Engineering
Publication date2014
Article number 914469
ISBN (Electronic)9780819496126
Publication statusPublished - 2014
EventSpace Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray - Palais des congrès de Montréal, Montréal, Canada
Duration: 22 Jun 201426 Jun 2014
Conference number: 9144


ConferenceSpace Telescopes and Instrumentation 2014
LocationPalais des congrès de Montréal
SeriesProceedings of S P I E - International Society for Optical Engineering


  • LOFT
  • Wide field monitor (WFM)
  • Gamma-ray
  • Trigger
  • Real-time detection and localization
  • Burst alert system

Fingerprint Dive into the research topics of 'The LOFT Burst Alert System and its Burst On-board Trigger'. Together they form a unique fingerprint.

Cite this