Abstract
We propose a new astrophysics space mission for a Low Energy Gamma-ray-burst Observatory (LEGO) that will fit the envelope of a small-explorer (SMEX) type mission. The LEGO instrument combines silicon pixel detectors with ultra-high energy resolution and a novel cost effective fine-pitch coded mask, to image the sky with sub-arcminute accuracy in the 0.3 - 30 keV range with a wide field-of-view. LEGO is well adapted to study hundreds of short transients such as gamma-ray bursts and soft gamma repeaters in the unexplored energy range below 5 keV. LEGO takes one of the next logical steps in GRB studies in the post-BeppoSAX era by attacking the astrophysics questions raised by recent discoveries of variable radio, optical, and x-ray counterparts to burst sources. In addition to monitoring the sky for gamma-ray bursts, LEGO would provide a first all-sky monitor in the 0.3-30 keV range. LEGO will be sensitive to all mCrab sources in the sky in a day and to 0.1 mCrab sources in a year, and thus, may provide daily light curves and sensitive spectral measurements on about 103 objects and yearly data on an order of magnitude more sources.
Original language | English |
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Pages (from-to) | 429-437 |
Number of pages | 9 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 3114 |
DOIs | |
State | Published - 1997 |
Externally published | Yes |
Event | Proceedings of the 1997 EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII - San Diego, CA, United States Duration: Jul 30 1997 → Aug 1 1997 |
Keywords
- All-sky monitor
- Coded aperture telescope
- Coded mask imaging
- Gamma Ray Bursts
- Silicon pixel detector
- X-ray detector