Recent content by auou

Perhaps not a 'democracy' an sich, but people are allowed to ask questions in contrast to a dictatorship. And isn't it the duty of peers to analyze critically? Otherwise anyone can just publish and claim whatever they want. If it's not 'democracy' than what is the correct word for this...

That's how democracy works, people get to ask questions. The duty of the opposition is to oppose. :wink:

Well if Redshift is relevant how much did the GW redshifted over time and loose energy? For Galaxies moving away we can keep track about what's going on, the Hubble constant, but a GW is just one short single pulse. Sure, we can know if it comes from one side or the other, 1 dimensional, but...

No, it's not perfect. A flag has many 'points' that serve as a reference to define direction etc. LIGO and Virgo combined only 3.

Imagine having a flag to define where the wind comes from, now start waving that flag around, and things become a lot more complicated.

Of course it has got nothing to do with the CMB itself, but the CMB acts like a reference frame. The detectors could be moving away or running into the GW, or be hit from the side, skewing the signal. So it all depends on running into the wave at a particular time of day (orientation), a few...

That one detector runs into the wave head on and the other sideways.

Yes, but we are also moving at 627 km/s relative to the CMB. So how much would the signal be skewed?

Again they show just a very small sample, and have probably used templates to get the match for the withened strain, the peaks in the SRN are still very different. I'd like to see what a 30 sec. stretch looks like. Also how fast is the Earth moving (turning) in relation to the signal and how...

There's a new signal detected now along with VIRGO in Italy: https://dcc.ligo.org/LIGO-P170814/public/main It keeps on being a bit weird, in the SRN graphs they look very different and in the Whitened Strain* they suddenly look the same. *The whitening emphasizes different frequency bands for...

Ok, one last thing that kept hanging in my mind was this comment in the Quantamagazine article about the raw data: And this related to your comment on the seismic sensors that filter out the vibrations of a drill: Does this mean that some signals like that of the drill nearby aren't in the...

'10% scaling of the amplitude of the templates'

OK. I guess the article is a bit misleading when they write: 'a jackhammer going off in the town near one detector won’t show up as noise in the other'. It gave me the impression that the drill showed up at least in the noise of that one detector. So there are 2 (or more) separate levels of...

Question here is were/how to draw the line? First you mention that the other signals are not strong enough, but it turns out other (strong) signals are not accepted.

The article claimed the same thing: BTW the signal of 'a jackhammer going off' should at least have the same 'signal strength' if not stronger. I speak of personal experience :smile: they have been doing construction works in my street the past few weeks and at times I could feel my apartment...