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Thread: Gravitational Wave Rumors Rumble Social Media

  1. #211
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    1. Detect another big BH merger
    2. Get Nobel prize
    3. ????
    4. Profit!

  2. #212
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    Quote Originally Posted by Don Alexander View Post
    1. Detect another big BH merger
    2. Get Nobel prize
    3. ????
    4. Profit!
    Given that the Nobel Prize includes a pretty substantial monetary award, I'm not sure that the third unknown step is really necessary in this particular case.
    Conserve energy. Commute with the Hamiltonian.

  3. #213
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    You just wait. :P

  4. #214
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    Space.com: Gravitational-Wave Announcement Coming on Oct. 16: What Could It Be?

    It seems very possible that the announcement will be one of four things:

    • LIGO has detected another pair of merging black holes (the least likely possibility, based on Weiss' comments).
    • It has detected gravitational waves coming from something other than black holes (most likely neutron stars).
    • Scientists have pinpointed the source of one of those previously detected black-hole collisions by identifying an associated light signal.
    • LIGO has found two merging neutron stars and also identified their source location.
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    Skepticism enables us to distinguish fancy from fact, to test our speculations. --Carl Sagan

  5. #215
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    Quote Originally Posted by Grey View Post
    Given that the Nobel Prize includes a pretty substantial monetary award, I'm not sure that the third unknown step is really necessary in this particular case.
    What a Nobel prize does not have is any form of attachment. No way to wear it.

  6. #216
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    I'll place a wager that the big news is merging neutron stars in NGC 4993, with initial discovery by LIGO and then a counterpart identified in the electromagnetic spectrum.

  7. #217
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    Quote Originally Posted by Don Alexander View Post
    I assume these are outside LIGO's observable frequency range, which is why we need eLISA?
    SMBH mergers: way higher frequency.

    This is a helpful diagram I just rediscovered for the speed of gravitational waves thread: Caltech: Gravitational Wave Spectrum. It shows the difference between LISA sensitivity and LIGO, and likely event types. Text there estimates SMBH binaries at 1/year, optimistically.
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    Skepticism enables us to distinguish fancy from fact, to test our speculations. --Carl Sagan

  8. #218
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    You mean lower frequency: milliHertz.

  9. #219
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    Monday, 2017 October 16, 2:00 pm UTC, 10:00 am EDT, 7:00 am PDT.

    Science Alert: There's Another Big Gravitational Wave Announcement on The Way

    Representatives from 70 other observatories around the world will be at the event, and simultaneous briefings will also be taking place in London and Munich.

    There will be two separate panel discussions at the main event, too. The first panel consists of directors and spokespersons from LIGO, Virgo and NASA.

    The second panel includes people like David Sand, Nial Tanvir, Eleonora Troja and Andy Howell, who have all performed research into supernovas, and Marcelle Soares-Santos, who is pioneering the Dark Energy Survey's search for an optical counterpart to gravitational wave events.
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    Skepticism enables us to distinguish fancy from fact, to test our speculations. --Carl Sagan

  10. #220
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    Quote Originally Posted by Don Alexander View Post
    You mean lower frequency: milliHertz.
    Yep. I was reading wavelength and writing frequency. Sorry.
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    Skepticism enables us to distinguish fancy from fact, to test our speculations. --Carl Sagan

  11. #221
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    I knew Nial was going to be there, but Nora too!

    Haha, this is so cool! I know these people personally.

    Looking forward to the press conference!

  12. #222
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    Rumor rumble over, until the next. It was a neutron-star merger, August 17, detected by 70 observatories, on all continents, throughout the electromagnetic spectrum. Within seconds.

    See topic LIGO/VIRGO: Neutron star coalescence
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    Skepticism enables us to distinguish fancy from fact, to test our speculations. --Carl Sagan

  13. #223
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    Wait, WTF, there is one single post one this??????????????

    I thought there would be pages of discussion already...

    Anyway, now I have at least 37 papers to read. :|

  14. #224
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    Quote Originally Posted by Don Alexander View Post
    Wait, WTF, there is one single post one this??????????????

    I thought there would be pages of discussion already...

    Anyway, now I have at least 37 papers to read. :|
    No, 01101001 linked to entire thread on it.
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  15. #225
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    This is absolutely fantastic news and exceeds all expectations as far as I'm concerned!

    Congratulations LIGO/VIRGO for a job better than well done!

    As an aside, I've been waging a battle (elsewhere) with an EU advocate for almost two years now about LIGO's detection capabilities and this just put a nail well-and-truly into his coffin. The individual is very anti-science vocal across the web, (he's an inagural Phil 'bannee') and is responsible for leading many, many science-curious folk astray.

    Well done LIGO .. very impressive!

  16. #226
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    Quote Originally Posted by StupendousMan View Post
    I'll place a wager that the big news is merging neutron stars in NGC 4993, with initial discovery by LIGO and then a counterpart identified in the electromagnetic spectrum.
    Cheers.
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  17. #227
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    Quote Originally Posted by Swift View Post
    No, 01101001 linked to entire thread on it.
    And that thread is LIGO/VIRGO: Neutron star coalescence

    Here's the press conference on Youtube, with two panels and Q&A, cleaned up a bit.
    ____________
    "Dumb all over, a little ugly on the side." -- Frank Zappa
    "Your right to hold an opinion is not being contested. Your expectation that it be taken seriously is." -- Jason Thompson
    "This is really very simple, but unfortunately it's very complicated." -- publius

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  18. #228
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    In 2020 we will have another location listening out for gravity waves.

    http://www.ecns.cn/m/cns-wire/2017/10-23/278071.shtml

    "A world-class observatory under construction at an altitude above 5,250 meters in Ngari Prefecture, Southwest China's Tibet Autonomous Region, will begin efforts to detect primary gravitational waves in 2020.

    Ngari is considered an ideal place for astronomers to gaze into the remote universe due to its thin air and clear skies. Chinese scientists will also undertake high-precision detection of cosmic rays in the program called the Ngari Plan."

    Sent from my SM-G900F using Tapatalk

  19. #229
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    Quote Originally Posted by selvaarchi View Post
    In 2020 we will have another location listening out for gravity waves....
    I understand that India is also building one.
    I hope that the new ones can have the same or better performance than the ALIGO in Louisiana. Getting clearer looks at the wave forms will tell us a lot.
    Forming opinions as we speak

  20. #230
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    I will bet 5 Internet Points that the new Chinese project in the Ngari area is an optical telescope designed to perform followup observations of gravitational wave sources detected by LIGO and VIRGO, rather than an actual detector of gravitational waves itself. The location makes sense for an optical telescope, and the cost and timescale also seem better suited to an optical telescope than something like LIGO.

    My guess is that a combination of translation issues and press release jargon has led to a mis-understanding.

  21. #231
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    I will bet you ten (!) Internet points that it is a submm telescope along the lines of BICEP2 and POLARBEAR, looking at the CMB for the elusive B-mode pola signal.

    Notice they say "primary gravitational waves". They likely mean primordial.

    Laser interferometers don't need to be put at 5 km altitude, and while that's nice for optical telescopes, it's not a must either. But submm needs extremely low prcipitable water vapor.

    Also, this:

    https://www.youtube.com/watch?v=LscrBf1CgnE

  22. #232
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    And another one, GW170608, the lightest BH-BH merger detected so far.

    This event, detected by the two NSF-supported LIGO detectors at 02:01:16 UTC on June 8, 2017 (or 10:01:16 pm on June 7th in US Eastern Daylight time), was actually the second binary black hole merger observed during LIGO’s second observation run since being upgraded in a program called Advanced LIGO, but its announcement was delayed due to the time required to understand two other discoveries: a LIGO-Virgo three-detector observation of gravitational waves from another binary black hole merger (GW170814) on August 14, and the first-ever detection of a binary neutron star merger (GW170817) in light and gravitational waves on August 17.
    Virgo was still in commissioning phase, and the paper says :
    The Advanced Virgo detector was, at the time of the
    event, in observation mode with a horizon distance for
    signals comparable to GW170608 of 60−70 Mpc. This
    was however during an early commissioning phase with
    still limited sensitivity, therefore Virgo data are not included
    in the analyses presented here.
    To me that at least suggests that it did detect it, and would therefor theoretically be the first three detector event, two months before GW170814.
    ____________
    "Dumb all over, a little ugly on the side." -- Frank Zappa
    "Your right to hold an opinion is not being contested. Your expectation that it be taken seriously is." -- Jason Thompson
    "This is really very simple, but unfortunately it's very complicated." -- publius

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