Sensitivity at end of S5

Dan G.
Dan G.
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Topic 193327

Does anyone know where I can find the ubiquitous LIGO sensitivity graph showing straing vs. frequency for LHO at each science run including S5 end?

Bikeman (Heinz-Bernd Eggenstein)
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Sensitivity at end of S5

Quote:
Does anyone know where I can find the ubiquitous LIGO sensitivity graph showing straing vs. frequency for LHO at each science run including S5 end?

Maybe here: http://www.ligo.caltech.edu/~jzweizig/distribution/LSC_Data/.

Is that what you are looking for?

CU
H-B

Dan G.
Dan G.
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Perfect! Yes, this is the one

Message 75456 in response to message 75455

Perfect! Yes, this is the one I was looking for. An thanks for the URL for sensitivities results. I didn't know about that page.

ALSO ... does anyone know why the units for strain on this graph are represented as: h per sqrt(Hz)? I've never seen that explained anywhere, but the sensitivity graph is always shown this way.

Thanks!

Bikeman (Heinz-Bernd Eggenstein)
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That's the unit of the

That's the unit of the root-sum-square strain amplitude .... which doesn't mean that much to me but given your background in physics this might ring a bell :-)

AFAIK this unit for sensitivity is more meaningful than the raw displacement as it this one allows to better compare a given waveform to the detectors sensitivity characteristics...but really someone with better physics skill should try to answer this.

Anybody?

CU
H-B

tullio
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RE: That's the unit of the

Message 75458 in response to message 75457

Quote:

That's the unit of the root-sum-square strain amplitude .... which doesn't mean that much to me but given your background in physics this might ring a bell :-)

AFAIK this unit for sensitivity is more meaningful than the raw displacement as it this one allows to better compare a given waveform to the detectors sensitivity characteristics...but really someone with better physics skill should try to answer this.

Anybody?

CU
H-B


Standard deviation?
Tullio

Odysseus
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RE: That's the unit of the

Message 75459 in response to message 75457

Quote:
That's the unit of the root-sum-square strain amplitude .... which doesn't mean that much to me but given your background in physics this might ring a bell :-)


It sounds analogous to the RMS (root-mean-square) method of measuring alternating currents, sounds, or other wave phenomena. Where a value oscillates (or wanders randomly) around zero, if you just take the mean of a set of measurements they tend to cancel out, telling you little about the amplitude (or range), but by first squaring them—or perhaps taking the absolute value—you get a better picture of the signal, so to speak.

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