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B Current working GWs detectors

  1. Apr 14, 2017 #1
    The second LIGO observational run started last year and according to Wikipedia the germany and italy based GWs detectors Geo600 and Virgo are already operational, I would like to confirm whether as of now the 4 detectors(2 from LIGO,1 GEO and 1 VIRGO) are simultaneously fully operative.
    I would expect that if this is the case a much better precision in locating the sources of possible detections can be achieved than what was possible only with 2, but it is hard to know just by looking at the official pages if the 4 detector are currently in a joint observing run.
     
  2. jcsd
  3. Apr 15, 2017 #2

    mfb

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    2016 Award

    Staff: Mentor

    GEO is not sensitive enough to contribute notably (unless there is a really powerful signal), it is mainly used to test new technologies.

    The websites are notoriously outdated. Virgo tells us that they will start taking data in 2016.
    A recent letter from February 2017 expects "a few more months" of commissioning.
     
  4. Apr 15, 2017 #3
    Thanks for the info.
    According to wikipedia Geo peak sensitivity is 2×10^-22, like ten times less sensitive than advanced Ligo(and close to Virgo) but enough to detect nearer or stronger signals. According to the page it is also in the joint observing run 02 and it was in 01 although apparently it wasn't sensitive enough to detect GW151226. In the first GW detection it didn't have the detectors connected as it was in engineering mode.

    I'm not sure the Ligo-Virgo scientific collaboration policy of not frequently updating their websites is the best in a context of plummeting interest on GWs after the initial uproar. Oddly the letter linked seems to show some signs of unexplained distrust from the journal perceived by the collaboration.
     
  5. Apr 15, 2017 #4

    mfb

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    Not updating a website does not need an active decision - quite the opposite.
    Various collaborations just don't have someone taking care of the website. It is not of large scientific interest, as the colleagues rely more on other communication channels.
     
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