Crab (unit)
A Crab is a standard astrophotometrical unit for measurement of the intensity of Astrophysical X-ray sources. One Crab is defined as the intensity of the Crab Nebula at the corresponding X-ray photon energy. The Crab Nebula, and the Crab Pulsar within it, is an intense space X-ray source. It is used as a standard candle in the calibration procedure of X-ray instruments in space. However, because of the Crab Nebula's variable intensity at different X-ray energies, conversion of the Crab to another units depends on the X-ray energy range of interest.
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Crab (unit)
A Crab is a standard astrophotometrical unit for measurement of the intensity of Astrophysical X-ray sources. One Crab is defined as the intensity of the Crab Nebula at the corresponding X-ray photon energy. The Crab Nebula, and the Crab Pulsar within it, is an intense space X-ray source. It is used as a standard candle in the calibration procedure of X-ray instruments in space. However, because of the Crab Nebula's variable intensity at different X-ray energies, conversion of the Crab to another units depends on the X-ray energy range of interest.
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A Crab is a standard astrophot ...... imes used instead of the Crab.
@en
Le crabe est une unité astroph ...... µCrab), sont parfois utilisés.
@fr
Поток Крабовидной туманности — ...... рта рентгеновской астрономии).
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Wikipage page ID
30,549,271
Wikipage revision ID
677,887,055
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A Crab is a standard astrophot ...... -ray energy range of interest.
@en
Le crabe est une unité astroph ...... µCrab), sont parfois utilisés.
@fr
Поток Крабовидной туманности — ...... ет варьироваться на несколько
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Crab (unit)
@en
Crabe (unité)
@fr
Поток Крабовидной туманности
@ru