Observations
The direct measurement of the EBL is a difficult task mainly due to the contribution of zodiacal light that is orders of magnitude higher than the EBL. Different groups have claimed the detection of the EBL in the optical and near-infrared). However, these different analysis seem suspicious of being contaminated by zodiacal light. Recently, two independent groups using different technique have claimed the detection of the EBL in the optical with no contamination from zodiacal light.
There are also other techniques that set limits to the background. It is possible to set lower limits from deep galaxy surveys. On the other hand, VHE observations of extragalactic sources set upper limits to the EBL.
Read more about this topic: Extragalactic Background Light
Famous quotes containing the word observations:
“Jerry: She’s one of those third-year girls that gripe my liver.
Milo: Third-year girls?
Jerry: Yeah, you know, American college kids. They come over here to take their third year and lap up a little culture. They give me a swift pain.
Milo: Why?
Jerry: They’re officious and dull. They’re always making profound observations they’ve overheard.”
—Alan Jay Lerner (1918–1986)
“All observations point to the fact that the intellectual woman is masculinized; in her, warm, intuitive knowledge has yielded to cold unproductive thinking.”
—Helene Deutsch (1884–1982)
“I have never yet seen any plan which has not been mended by the observations of those who were much inferior in understanding to the person who took the lead in the business.”
—Edmund Burke (1729–1797)