Record-breaking Gamma Ray Burst detected.

[walterpthefirst]

https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html

 

As Cerenkov I've posed a question at Physics Forums about the possibility of neutrinos from the core-collapse being detectable here on Earth.

 

https://www.physicsforums.com/threads/gamma-ray-burst-grb221009a.1046479/

 

Let's see what happens.

 

 

Thank you,

 

Walter.

[☆ pantheory ☆]

As Cerenkov I've posed a question at Physics Forums about the possibility of neutrinos from the core-collapse being detectable here on Earth.

1 hour ago, walterpthefirst said:

https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html

 

As Cerenkov I've posed a question at Physics Forums about the possibility of neutrinos from the core-collapse being detectable here on Earth.

 

https://www.physicsforums.com/threads/gamma-ray-burst-grb221009a.1046479/

 

Let's see what happens.

 

 

Thank you,

 

Walter.

 

"As Cerenkov I've posed a question at Physics Forums about the possibility of neutrinos from the core-collapse being detectable here on Earth."

 

Yes, you're right. You would be able to see a bevy of neutrinos if the event were close enough. Unlike EM radiation, neutrinos are very difficult to observe or detect when such an event spreads out. Neutrinos can be as difficult to detect as gravity waves.  They are believed to occur in the domain of colliding stellar black holes and/or neutron stars. Special equipment would have to be built to detect such distant events. Their domain of study is astronomy, generally not cosmology. 

[walterpthefirst]

Cerenkov said:

 

is it reasonable to expect neutrino detections from GRB221009A?

 

Vanadium 50 replied...

 

No. GRB221009A is 10-15,000 times further away. That means the neutrino rate is 100's of millions of times smaller. In 1987A we saw a few dozen neutrinos.

So no,

[walterpthefirst]

Cerenkov said:

Is it the inverse square law that makes neutrino detection so difficult at great distances?

 

Astronuc replied...

That's part of the challenge, in addition to the low probability of interaction. As V50 indicated the flux falls off as 1/d2, where d is the distance from source to observer. SN 1987A was 168,000 ly distant, as compared to 2.4 billion ly for GRB221009A. It is an interesting/amusing statement regarding the 'proximity' to earth: "This event, because of its relative proximity to Earth, . . . "

Reference: https://www.physicsforums.com/threads/gamma-ray-burst-grb221009a.1046479/#post-6811845