15 October 1997 New astrophysics mission for a low-energy gamma-ray burst observatory (LEGO)
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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.
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Tumay O. Tumer, Tumay O. Tumer, Kevin C. Hurley, Kevin C. Hurley, Hakki Ogelman, Hakki Ogelman, Robert J. Paulos, Robert J. Paulos, Richard Charles Puetter, Richard Charles Puetter, Eric J. Beuville, Eric J. Beuville, Dieter H. Hartmann, Dieter H. Hartmann, Bradley Schaefer, Bradley Schaefer, Jeff Preble, Jeff Preble, Richard E. Rothschild, Richard E. Rothschild, Mark H. Finger, Mark H. Finger, Lorenzo Fabris, Lorenzo Fabris, Terrence J. O'Neill, Terrence J. O'Neill, Mark Jennings, Mark Jennings, Amos Yahil, Amos Yahil, } "New astrophysics mission for a low-energy gamma-ray burst observatory (LEGO)", Proc. SPIE 3114, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII, (15 October 1997); doi: 10.1117/12.283801; https://doi.org/10.1117/12.283801


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