Novel design for an all sky low energy gamma-ray observatory (ALLEGRO)

M. P. Ulmer*, D. D. Dixon, G. Pendleton, Wm A. Wheaton, S. M. Matz, J. Finley, W. R. Purcell, R. Nyquist, J. Jonaitis

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


We present a novel concept for a MIDEX satellite mission that allows all sky coverage for gamma-ray bursts and hard X-ray transients. The Multiscale Alternating Shadow Collimator (MASC) alone allows for arc minute positioning of 1 second bursts 3 times weaker than the BATSE sensitivity. Our scientific objectives include the ability: (a) to detect and monitor thousands of gamma-ray bursts (GRBs) and hard X-ray sources with sensitivity 3-10 times better than BATSE; (b) to solve the gamma-ray burst mystery; (c) to use gamma-ray bursts as probes of cosmological star formation and to measure cosmological parameters; (d) to understand the physics of the high energy radiation from AGNs and BLAZARs; (e) to study the physics of matter in the extreme around black holes and neutron stars; (f) to determine the pulsar birth rate and physical characteristics. The mission concept, MASC concept, and simulations are presented.

Original languageEnglish (US)
Pages (from-to)530-538
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1999
EventProceedings of the 1999 EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy X - Denver, CO, USA
Duration: Jul 21 1999Jul 23 1999

ASJC Scopus subject areas

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


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