Infrared and optical evidence for a dust cloud behind supernova 1987A

@article{Felten1989InfraredAO,
  title={Infrared and optical evidence for a dust cloud behind supernova 1987A},
  author={James Edgar Felten and Eli Dwek},
  journal={Nature},
  year={1989},
  volume={339},
  pages={123-125}
}
THE 8–13-μm flux from supernova 1987A has increased substantially1 since around May 1988 (∼ 450 days after the explosion), and the 8–13-μm source has been resolvable1, having a full width at half maximum of ∼1.5" in September 1988. This is attributed1 to re-radiation by an asymmetric circumstellar dust cloud, located mainly behind the supernova at a distance of ∼200 light days. This cloud may be related to the gas shell inferred from ultraviolet lines2,3. Here we extend the calculations of… 

Far-infrared observations of thermal dust emission from supernova 1987A

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The mid-infrared emission (at wavelengths near 10 μm) from SN1987A, which had been fading steadily since reaching a peak about 120 days after outburst, began to increase again on about day 4501. This

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