[arXiv:0810.0283] All-sky LIGO Search in the Early S5 Data

hoarfrost
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Topic 194004

Hello!

[arXiv:0810.0283] All-sky LIGO Search for Periodic Gravitational Waves in the Early S5 Data

Found link in one of russian reviews of astro-ph. Whether relation exist between this paper and Einstein@Home?

Mike Hewson
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[arXiv:0810.0283] All-sky LIGO Search in the Early S5 Data

Quote:

Hello!

[arXiv:0810.0283] All-sky LIGO Search for Periodic Gravitational Waves in the Early S5 Data

Found link in one of russian reviews of astro-ph. Whether relation exist between this paper and Einstein@Home?


Well, we're mentioned in the introduction, second paragraph, but in the sense of also doing stuff. I don't recognise the "Power Flux method" phrase, or "Hann windowed" and the templates also mention polarisation parameters that I've never seen mentioned here. The frequency [ 50 - 1100Hz ] and frequency derivative [ -5 to +5 x10^(-9) Hz s^(-1) ] ranges differ from what I've seen at E@H. It's evidently work done by the Continuous Wave group, which E@H works under, but it looks to be a processing effort independent of E@H. It doesn't look to be post-processing on E@H data either. Having said that there is a lot of similarity in approach. It's another "upper limit" report on the LIGO data. First mention I've seen of "strange quark" stars .... :-)

Cheers, Mike.

I have made this letter longer than usual because I lack the time to make it shorter. Blaise Pascal

Bikeman (Heinz-Bernd Eggenstein)
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Yeah, definitely not directly

Yeah, definitely not directly related to E@H. "Powerflux" is one of (at least) three "semi-coherent" algorithms used to search for periodic GW, the others are "Stackslide", and "Hough Transform", the latter is used for E@H with S5R3 and S5R4.

For the curious, this paper compares those algorithms: http://arxiv.org/abs/0708.3818v1 .

CU

Bikeman

Bikeman (Heinz-Bernd Eggenstein)
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RE: the others are

Message 87014 in response to message 87013

Quote:
the others are "Stackslide", and "Hough Transform", the latter is used for E@H with S5R3 and S5R4.

To be more precise, E@H S5R3&4 use the combination of the "F-statistics" and the "Hough Transform", multiple interferometer search method that is mentioned in the final section of the paper I linked in my message above.

CU
Bikeman

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