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Methanol Masers

  1. Jan 13, 2009 #1

    I'm an MPhys Physics with Astro student, conducting my final year project in the field of radio astronomy (well, it's more like electronics at the moment - trying to fix a downconverter, but anyway...)

    My question: I'm interested in observing the 6.67GHz methanol maser emission. For a part of my project I think I need to know the "strength" of the methanol signal reaching Earth. (I need to be able to compare the gain of signal strength to the noise figure of my downconverter - I think this is where the problems may lie with my system!!)

    I have tried looking through various journals and websites. From what I can see, on average, the peak flux density for methanol masers varies between 200-5000 Jy.

    Admittedly, my electronics knowledge is poor, but I was wondering and have been trying to figure out, if this value is related in anyway?

    Many thanks for any help or advice anyone can give!
  2. jcsd
  3. Jan 13, 2009 #2


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    Welcome to PF, smithy! :smile:

    You ask: "I was wondering and have been trying to figure out, if this value is related in anyway?"

    I'm afraid I don't understand the question; related to (or with) what (I assume "this value" is "the peak flux density for methanol masers").

    Do you know what a jansky is?
  4. Jan 13, 2009 #3
    1 Jy = 1x10^(-26) W m^(-2) s

    As far as I'm aware, Jansky is a measure of energy radiation, named after the founder of radio astronomy.

    Yes, I'm just trying to see if anyone knows of a connection between peak flux density (in Jy) to the gain of the methanol signal (in dB) ? I can't seem to find any useful information on methanol signal strength anywhere (except given in Jy, but then I can't work out/find out any conversion factors).

    Thanks again!
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