The \u201cFermi Sky Blog\u201d can be reached from the Fermi main web page [1], though I guess it doesn\u2019t hurt to note the direct link here [2].<\/p>\n
In the \u201cFermi LAT weekly report N. 138 \u2026 2011.January.24 – 2011.January.30\u201d, we find the following:\u00a0 \u201c3C 454.3 fairly bright for all the week, with daily flux between 2.5e-6 and 6.4e-6.\u201d\u00a0 This type of report has been a fairly common format in the Fermi Sky Blog, with flux levels often being very low, from sources so far away that it leaves one quite impressed with the technology and analysis methods whatever they may be.<\/p>\n
Noteworthy is that \u201cFluxes are in the unit of photons\/cm2<\/sup>\/s above 100 MeV. All errors are statistical only.\u201d\u00a0 Gravity is at 313 MeV and, as has been said many times before, the LAT seems designed to measure gravity as one of its main purposes.\u00a0 The designers would not have had to know how gravity works; they would only have had to know the typical frequency range of sources from past data and experience.<\/p>\n Steady sources said to be \u201cfairly bright for all the week\u201d are encouraging to see, because gravity at a given relative location and time period is normally a steady field.\u00a0 Most sources above 100 MeV are indeed steady, and let us be reminded that even the closest celestial body to the earth, the moon, is \u201can object with an absolutely known gamma-ray output\u201d [3], and a stunning image [4].<\/p>\n \u00a0<\/p>\n [1] http:\/\/fermi.gsfc.nasa.gov\/<\/a><\/p>\n [2] http:\/\/fermisky.blogspot.com\/<\/a><\/p>\n [3] https:\/\/www.fruechtetheory.com\/blog\/2007\/11\/14\/glast-calibration\/<\/a><\/p>\n