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BREAKTHROUGH DETECTS REPEATING FAST RADIO BURSTS COMING FROM DISTANT GALAXY

Discussion in 'Education & Research' started by sangos, Aug 31, 2017.

  1. sangos

    sangos Lt. Colonel ELITE MEMBER

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    The Karl G. Jansky Very Large Array, located in central New Mexico. Credit: NRAO
    Astronomy, Extraterrestrial, Radio Astronomy
    [​IMG] Article written: 30 Aug , 2017by Matt Williams


    In July of 2015, Russian billionaire Yuri Milner announced the creation of Breakthrough Listen, a decade-long project that would conduct the largest survey to date for signs of extra-terrestrial communications (ETI). As part of his non-profit organization, Breakthrough Initiatives, this survey would rely on the latest in instrumentation and software to observe the 1,000,000 closest stars and 100 closest galaxies.

    Using the Green Bank Radio Telescope in West Virginia, the Listenscience team at UC Berkeley has been observing distant stars for over a year now. And less than a week ago, they observed 15 Fast Radio Bursts (FRBs) coming from a dwarf galaxy located three billion light-years away. According to a study that described their findings, this was the first time that repeating FRBs have been seen coming from this source at these frequencies.

    The team’s study, titled “FRB 121102: Detection at 4 – 8 GHz band with Breakthrough Listen backend at Green Bank“, was recently published in The Astronomers Telegraph. Led by Dr. Vishal Gajjar – a postdoctoral researcher at the University of California, Berkeley – the team conducted a detailed survey of FRB 121102. This repeating FRB source is located in a dwarf galaxy in Auriga constellation, some 3 billion light-years from Earth.

    [​IMG]
    The NSF’s Arecibo Observatory, which is located in Puerto Rico, is the world largest radio telescope. Credit: NAIC

    To clarify, FRBs are brief, bright pulses of radio waves that are periodically detected coming from distant galaxies. This strange astronomical phenomena was first detected in 2007 by Duncan Lorimer and David Narkovic using the Parkes Telescope in Australia. To honor their discovery, FRBs are sometimes referred to as “Lorimer Bursts”. Many FRB sources have been confirmed since then, some of which were found repeating.

    The source known as FRB 121101 was discovered back on November 2nd, 2012, by astronomers using the Arecibo radio telescope. At the time, it was the first FRB to be discovered; and by 2015, it became the first FRB to be seen repeating. This effectively ruled out the possibility that repeating FRBs were caused by catastrophic events, which had previously been theorized.

    And in 2016, FRB 121102 was the first FRB to have its location pinpointed to such a degree that its host galaxy could be identified. As such, the Listen science team at UC Berkeley was sure to add FRB 121102 to their list of targets. And in the early hours of Saturday, August 26th, Dr. Vishal Gajjar – a postdoctoral researcher at UC Berkeley – observed FRB 121102 using the Green Bank Radio Telescope (GBRT) in West Virginia.

    Using the Digital Backend instrument on the GBRT, Dr. Gajjar and the Listen team observed FRB 121102 for five hours. From this, they accumulating 400 terabytes of data in the entire 4 to 8 GHz frequency band which they then analyzed for signs of short pulses over a broad range of frequencies. What they found was evidence of 15 new pulses coming from FRB 121102, which confirmed that it was in a newly active state.

    [​IMG]
    The Green Bank Telescope, located in West Virginia. Credit: NRAO

    In addition, their observations revealed that the brightest of these 15 emissions occurred at around 7 GHz. This was higher than any repeating FRBs seen to date, which indicated for the first time that they can occur at frequencies higher than previously thought. Last, but not least, the high-resolution data the Listen team collected is expected to yield valuable insights into FRBs for years to come.

    This was made possible thanks to the Digital Backend instrument on the GBRT, which is able to record several GHz of bandwidth simultaneously and split the information into billions of individuals channels. This enables scientists to study the proprieties and the frequency spectrum of FRBs with greater precision, and should lead to new theories about the causes of these radio emissions.

    So even if these particular signals should prove to not be extra-terrestrial in origin, Listen is still pushing the boundaries of what is possible with radio astronomy. And given that Breakthrough Listen is less than two years into its proposed ten-year survey, we can expect many more sources to be observed and studied in the coming years. If there’s evidence of ETI to be found, we’re sure to find out about it sooner or later!

    And be sure to check out this video of the Green Bank Telescope and the surveys it allows for, courtesy of Berkeley SETI:


    Further Reading: Breakthrough Initiatives

    https://www.universetoday.com/13700...ting-fast-radio-bursts-coming-distant-galaxy/

     
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  2. Grevion

    Grevion Professional Think Troll IDF NewBie

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    Alliens do exist!
    Duh :dude:
     
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  3. zebra7

    zebra7 Captain FULL MEMBER

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    Then why Digging your OWN Grave, by inviting the Gallactical forces to Invade Earth.
     
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  4. zebra7

    zebra7 Captain FULL MEMBER

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    Sure, and I believe completely that the life came to the earth in the form of the DNA from the meteors, rather than B.S Electric Sparks trigger it.
     
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  5. randomradio

    randomradio Colonel REGISTERED

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    Random radio, people. You never know when you get hit by one. :D
     
  6. sangos

    sangos Lt. Colonel ELITE MEMBER

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    Breakthrough is a Passive listening project. They are not sending messages to aliens.
    Btw if galactic forces do come we are not sure if they will kill/eat us. Anyway no worries since there is no sign of them so far(the distances are toooooo humongous for travel)
     
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  7. Angel Eyes

    Angel Eyes 2nd Lieutant FULL MEMBER

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    By the time these signals reached us , that civilization may have died....
     
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  8. Golden_Rule

    Golden_Rule Lieutenant FULL MEMBER

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    How do the scientist estimate the source of a radio signal to be 3 billion light years away and not 30 billion LY or 0.3 billion LY away?
     
  9. Pash

    Pash FULL MEMBER

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    100% agreeded.

    These signals will be travelling from millions of years. If these civilizations some how survived, they will be totally different.
     
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  10. Vyom

    Vyom Captain IDF NewBie

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    The apparent red shift in their wavelengths... vs that of the Cosmic microwave background radiation...
     
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  11. sangos

    sangos Lt. Colonel ELITE MEMBER

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    The source has been pinpointed to a known dwarf galaxy(smaller than ours) @3 billion LYs. Dr Gujjar collected enough data so they are absolutely sure of the source of these repeating signals. Earlier FRBs did not repeat(maybe 1?).

    3 billion years old. Hyper advanced aliens cannot be ruled out. The only known source of such radio bursts are pulsars. Here the transmitter power required far exceeds any known pulsar.
     
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  12. SR-91

    SR-91 2nd Lieutant FULL MEMBER

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    More than 20 species have visited earth for centuries. clues are all around us however, Most are peaceful.

    We know for sure, where ever there's water, there's life. Closest to earth is Moon and Indian Chandrayan found water on it.

    We would be NAIVE to think we are alone in this UNIVERSE.
     
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