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MSX Observations of Diffuse UV Emission in Orion
We have observed intense diffuse radiation in the UV (1400 Å -2600 Å) from three fields around M42 in Orion. Intensities of20000 photons cm-2 sr-1 s-1 Å-1 were observed to the east and westof M42 with 8000 photons cm-2 sr-1 s-1 Å-1 south of the nebula.Enhanced emission, perhaps associated with a nearby complex of molecularclouds observed in CO, was detected in one of the fields. The IRAS 1000μm emission in that region is highly correlated with the UV intensitywith a UV-IR ratio of 40 photons cm-2 sr-1 s-1 Å-1 (MJy sr-1)-1.In the other two fields there was no structure in the diffuse emissionnor was there any correlation with the IRAS emission.
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Osservazione e dati astrometrici
| Costellazione: | Giraffa |
| Ascensione retta: | 05h36m50.76s |
| Declinazione: | +71°03'36.3" |
| Magnitudine apparente: | 8.528 |
| Distanza: | 314.465 parsec |
| Moto proprio RA: | -17.4 |
| Moto proprio Dec: | -38.5 |
| B-T magnitude: | 8.83 |
| V-T magnitude: | 8.553 |
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