Fast Radio Bursts

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Message 2026619 - Posted: 6 Jan 2020, 23:20:23 UTC

Mysterious repeating fast radio burst traced to nearby galaxy
https://www.cnn.com/2020/01/06/world/repeating-fast-radio-burst-source-scn/index.html

(CNN)Astronomers have traced the signal of an enigmatic repeating fast radio burst for only the second time -- and it's in a spiral galaxy similar to our own, not so far away.

Fast radio bursts, or FRBs, are millisecond-long bursts of radio waves in space. Individual radio bursts emit once and don't repeat. Repeating fast radio bursts are known to send out short energetic radio waves multiple times.
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Message 2031905 - Posted: 10 Feb 2020, 23:29:15 UTC - in response to Message 2026619.  

https://www.foxnews.com/science/mysterious-signal-deep-space-repeating-16-day-cycle
Mysterious signal from deep space is repeating in 16-day cycle

Fast radio bursts (FRBs) are perhaps the most mysterious anomaly in space, with many having unknown origins. According to a new study, an FRB has been spotted coming from a galaxy 500 million light-years from Earth and it's repeating every 16 days.

And no one knows why.

Known as FRB 180916.J0158+65, this FRB sends out radio wave bursts for a period of four days, stops for a period of 12 days, then repeats itself. The initial 28 patterns were first observed between September 2018 and October 2019, according to a pre-published study. "We conclude that this is the first detected periodicity of any kind in an FRB source," the researchers wrote in the study.
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Message 2037891 - Posted: 14 Mar 2020, 18:11:06 UTC - in response to Message 2031905.  

Something interesting about the newly discovered repeating Fast Radio Burst with a fairly consistent 16 day cycle -- FRB180916. When the pulses from the CHIME radio telescope are graphed, the pulse width peaks at 0.9, and 3.6, milliseconds The latter peak is a multiple of the first one, for: 0.9 x 4= 3.6

Further, the peak flux of the signals bunches up, when graphed, at relative values around 0.45, 0.9, and 1.3. The latter two are multiples of the first. For: 0.45 x 2 = 0.9, and 0.45 x 3= 1.35 .

More data will, of course, be needed before it 's altogether clear that these relationships hold true, and if so, what they may mean, but it looks interesting already.
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Message 2047864 - Posted: 2 May 2020, 5:28:15 UTC - in response to Message 2037891.  

https://futurism.com/scientists-fast-radio-bursts-milky-way
Scientists Detect Powerful Radio Burst Coming From Our Own Galaxy

Astronomers have detected the first-ever fast radio burst (FRB) originating in our own galaxy, ScienceAlert reports.

“Something like this has never been seen before,” Caltech astronomer Shrinivas Kulkarni told ScienceAlert.

The signal, a millisecond-wave bursts of radio waves, was traced back to a Milky Way magnetar, a type of neutron star with an extremely strong magnetic field. The magnetar suddenly lit up, sending out a gargantuan millisecond-long burst of bright radio waves, picked up by astronomers on April 28.
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Message 2047893 - Posted: 2 May 2020, 16:14:36 UTC
Last modified: 2 May 2020, 16:23:07 UTC

The connection of magnetars, neutron stars with unusually strong magnetic fields, to Fast Radio Bursts, had already been theorized. This seems to be the first observational evidence that this could be their source.

The newly detected source of an apparent FRB is SGR 1935+2154, which is 30,000 light years distant. It is located in the constellation Vulpecula. It also emitted x-rays and gamma rays at the same time. This is not characteristic of FRBs in general. It was realized, though, that if SGR 1935+2154 were as distant as the other apparent sources of FRBs, these other radiations would probably not have been detected.

A good deal more confirmatory evidence will need to be collected to support the magnetar sourcing of FRBs, but on the face of it, the resemblance of the radio burst from this source in our galaxy to other FRBs apparently looks quite strong.

Please find a link, below, to another article, with further information on this discovery:

https://www.sciencealert.com/a-galactic-magnetar-just-spat-out-something-shockingly-like-a-fast-radio-burst
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Message 2048379 - Posted: 7 May 2020, 1:52:17 UTC

A new article on the recently discovered apparent FRB source in magnetar SGR 1935+2145 includes an interesting time vs. frequency chart of the emissions. It extends from about 400 to 800 MegaHertz.
Some of the strongest emissions seem to bunch up at nearly regular frequency intervals of 40 MHz, giver or take a little. I wonder what could be causing that. Does it suggest anything to anybody?

Please find a link to the article, with chart, below:


https://earthsky.org/space/fast-radio-burst-detected-within-milky-way
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Message 2051376 - Posted: 8 Jun 2020, 3:16:32 UTC - in response to Message 2048379.  

Hi Michael!

Glad you like this subject. I found another article.

https://www.forbes.com/sites/jamiecartereurope/2020/06/07/mysterious-pattern-of-cosmic-radio-bursts-from-a-distant-galaxy-repeats-every-157-days-say-scientists/#ede36068db77

Mysterious Pattern Of ‘Cosmic Radio Bursts’ From A Distant Galaxy Repeats Every 157 Days, Say Scientists

One of the great mysteries of modern astronomy has been revealed after a five years-long observation found a repeating pattern in a radio signal coming from a small dwarf galaxy about three billion light-years from Earth.
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Message 2051402 - Posted: 8 Jun 2020, 12:03:59 UTC - in response to Message 2051376.  

Suggests an orbiting Neutron star or a magnetar. Though the period is interesting --we should be able to come up with a probable model of what causes this Phenomenon.
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Message 2051638 - Posted: 12 Jun 2020, 4:03:10 UTC - in response to Message 2051402.  
Last modified: 12 Jun 2020, 4:04:03 UTC

I posted last night? My post got deleted??

https://www.quantamagazine.org/a-surprise-discovery-shows-magnetars-create-fast-radio-bursts-20200611/

A Surprise Discovery Points to the Source of Fast Radio Bursts

On the morning of April 28, a newly built radio telescope was monitoring the quiet skies over British Columbia when it caught the flash that would change everything. One of the telescope’s duties was to search for fast radio bursts — millisecond-long blips that, until then, had always come from distant galaxies. No one knew for sure what could create such short explosions of radio waves, making fast radio bursts one of the most intriguing puzzles in astrophysics.
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Message 2052181 - Posted: 18 Jun 2020, 3:28:09 UTC - in response to Message 2051638.  

https://www.engadget.com/first-regular-rhythm-of-fast-radio-bursts-221810525.html


Astronomers find the first known regular pattern of fast radio bursts

Astronomers are having an easier time finding fast radio bursts as of late, and that now includes the first regular pattern for those bursts. A research team from MIT and elsewhere has discovered that something 500 million light-years away is routinely producing four days of seemingly random but frantic bursts, followed by 12 days of silence — something that happened consistently for 500 days of study.
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Message 2053258 - Posted: 13 Jul 2020, 23:40:41 UTC - in response to Message 2052181.  

story held for a week.

https://www.newsweek.com/circle-radio-waves-space-source-unknown-1516549
'Odd' Circles of Radio Waves Coming from Unknown Cosmic Source Discovered

Strange, never-before-seen circles of radio waves have been discovered in space. Researchers in Australia say what is producing the "odd radio circles"—or ORCs—is unknown.
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Message 2054397 - Posted: 31 Jul 2020, 2:27:15 UTC - in response to Message 2053258.  

??????

https://www.dailymail.co.uk/sciencetech/article-8577235/Dead-star-Milky-Way-emits-never-seen-burst-radiation.html

Source of a mysterious 'fast radio burst' in space is traced back to a dead star in the middle of the Milky Way

The source of a mysterious 'fast radio burst' in space has been traced back to a dead star in the middle of the Milky Way.

Fast radio bursts, or FRBs, are radio emissions that appear temporarily and randomly from space, ranging from a fraction of a millisecond to a few milliseconds.

The space telescope Integral, operated by the European Space Agency, traced the FRB to a highly magnetic dead star known as a magnetar, called SGR 1935+2154.

This particular magnetar was recently detected radiating a combination of X-rays and radio waves, astronomers at the ESA reveal.
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Message 2055802 - Posted: 25 Aug 2020, 1:23:36 UTC - in response to Message 2054397.  

https://interestingengineering.com/famous-radio-burst-is-awake-on-its-157-days-cycle
Famous Radio Burst Is Awake On Its 157-Days Cycle

One of the stunning mysteries of Space, as gripping as blackholes, Fast Radio Bursts are once again in contact with us. The famous signal revived recently, called FRB 121102, was first caught by the world's largest single radio telescope, Aperture Spherical Radio Telescope (FAST) in China back in 2012.
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Message 2060635 - Posted: 5 Nov 2020, 7:43:28 UTC - in response to Message 2055802.  

https://www.sciencealert.com/powerful-radio-signal-detected-in-our-galaxy-is-officially-a-fast-radio-burst
Powerful Radio Signal Detected in Our Galaxy Is Officially a Fast Radio Burst

The origin of powerful fast radio bursts (FRBs) - intense flashes of radio emission that only last a few milliseconds - has puzzled scientists since they were first detected a little over a decade ago.

They are typically extragalactic, meaning they originate outside our galaxy, but on April 28 this year, multiple telescopes detected a bright FRB from the same area within our Milky Way.

Importantly, they were also able to pin down the source: galactic magnetar SGR 1935+2154.

Magnetars, young neutron stars that are the most magnetic objects in the universe, have long been prime suspects in the hunt for the source of these radio bursts.
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Message 2060753 - Posted: 6 Nov 2020, 13:47:27 UTC - in response to Message 2060635.  

Nailed it!. :^)

Excuse my enthusiasm... I'm most often wrong lol.
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Message 2060968 - Posted: 8 Nov 2020, 20:41:58 UTC

Unpredictable space radio bursts may stem from asteroids around magnetic stars
https://www.space.com/fast-radio-bursts-from-asteroid-magnetars

Scientists calculated that an object orbiting a pulsar — perhaps an asteroid — would carve a wake in the pulsar's wind. An electric current would circulate around this wake, and when the pulsar's wind crosses this wake, the researchers calculated, the resulting magnetic disturbances would generate a very narrow and extremely intense beam of radio waves.

The researchers noted that asteroids 0.6 to 6 miles wide (1 to 10 kilometers) orbiting their pulsars at one astronomical unit (AU) or closer would generate fast radio bursts of the intensities detected to date, especially if the pulsars had powerful magnetic fields. (One AU is the average distance between Earth and the sun, which is about 93 million miles or 150 million kilometers.) ... Asteroids zipping through a pulsar's highly magnetic, superfast winds would continuously generate intense radio beams. But astronomers on Earth would only see these beams as bursts, during the rare instances when the neutron stars, asteroids and telescopes on Earth happened to line up.
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Message 2061562 - Posted: 16 Nov 2020, 23:24:33 UTC - in response to Message 2060968.  

https://www.sciencealert.com/it-s-official-magnetar-sgr-1935-2154-is-a-fast-radio-burst-repeater
It's Official: The Fast Radio Burst Coming From Within Our Galaxy Is Repeating

The first object within the Milky Way galaxy caught emitting fast radio bursts is now officially a repeater.

In a new peer-reviewed paper, SGR 1935+2154 has been described spitting out two more powerful radio signals consistent with those seen from extragalactic sources.

?????
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Message 2077638 - Posted: 10 Jun 2021, 4:05:35 UTC - in response to Message 2061562.  

https://scitechdaily.com/chime-telescope-detects-more-than-500-mysterious-fast-radio-bursts-from-outer-space/
CHIME Telescope Detects More Than 500 Mysterious Fast Radio Bursts From Outer Space

To catch sight of a fast radio burst is to be extremely lucky in where and when you point your radio dish. Fast radio bursts, or FRBs, are oddly bright flashes of light, registering in the radio band of the electromagnetic spectrum, that blaze for a few milliseconds before vanishing without a trace.

These brief and mysterious beacons have been spotted in various and distant parts of the universe, as well as in our own galaxy. Their origins are unknown, and their appearance is unpredictable. Since the first was discovered in 2007, radio astronomers have only caught sight of around 140 bursts in their scopes.
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Message 2077646 - Posted: 10 Jun 2021, 11:59:21 UTC - in response to Message 2077638.  

As we have noted before--more detail should be given as to the content of the burst. I believe that these have been analyzed to some extent but the popular press and tabloids should be more forthcoming as to what is in these bursts. Modulation, stochastic analysis, periodicity--matching chirps etc. It should not be long before the phenomenon which creates these is put forward--just as we did for Quasars and the like. I trust that our finest experts in signal processing have had the chance to examine these emissions.
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Message 2077649 - Posted: 10 Jun 2021, 13:36:00 UTC - in response to Message 2077646.  
Last modified: 10 Jun 2021, 13:40:09 UTC

I agree, but note that it is probably beyond the understanding of the technical detail and translate it into something that Joe/Jane Public might understand.
Bob Smith
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