Observation and Spectral Measurements of the Crab Nebula with Milagro
- Gonzalez, M. M.
- October 03, 2011.
- Physical Description:
- 1 electronic document
- Additional Creators:
- Falcone, A., Gordo, J. B., Aune, T., Goodman, J. A., Kolterman, B. E., Allen, B. T., Berley, D., Fleysher, R., Morgan, T., Benbow, W., Mincer, A. I., Nemethy, P., Hays, E., Abdo, A. A., Chen, C., McEnery, J. E., Huntemeyer, P. H., Fleysher, L., Dingus, B. L., Linnemann, J. T., Hoffman, C. M., Christopher, G. E., and DeYoung, T.
- Restrictions on Access:
- Unclassified, Unlimited, Publicly available. and Free-to-read Unrestricted online access
- The Crab Nebula was detected with the Milagro experiment at a statistical significance of 17 standard deviations over the lifetime of the experiment. The experiment was sensitive to approximately 100 GeV - 100 TeV gamma ray air showers by observing the particle footprint reaching the ground. The fraction of detectors recording signals from photons at the ground is a suitable proxy for the energy of the primary particle and has been used to measure the photon energy spectrum of the Crab Nebula between ~1 and ~100 TeV. The TeV emission is believed to be caused by inverse-Compton up-scattering scattering of ambient photons by an energetic electron population. The location of a Te V steepening or cutoff in the energy spectrum reveals important details about the underlying electron population. We describe the experiment and the technique for distinguishing gamma-ray events from the much more-abundant hadronic events. We describe the calculation of the significance of the excess from the Crab and how the energy spectrum is fit.
- NASA Technical Reports Server (NTRS) Collection.
- Document ID: 20120009481.
- Copyright, Distribution as joint owner in the copyright.
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