The KAGRA is set on one of the most seismic active areas of the world. My paper, publisher website https://www.mdpi.com/1099-4300/22/3/301 <https://www.mdpi.com/1099-4300/22/3/301?fbclid=IwAR2S_myA9UnjeeSXVZ3LD8irTWWl8WaAWWSv3BOViCFxf1UJy1QrjK7Hfo8> and arxiv https://arxiv.org/abs/2007.01106 <https://arxiv.org/abs/2007.01106?fbclid=IwAR2WAy5nyakMZWnbxhmDqsh_Zehaj3062JwQDE-Vbw8qMp_dwPNiITjH92w> , requires a LIGO or LISA capable of detecting changes in metric with BMS symmetries. I read a report on how LIGO detectors are being deformed slightly in permanent ways. This could be a manifestation of BMS charge, but also instrument responses. With space based LISA this will be detectable.
LC On Sunday, November 1, 2020 at 3:26:23 AM UTC-6 [email protected] wrote: > On Wednesday Ligo/Virgo released a more detailed analysis of the first > half of its third observational run which went from April 1 2019 to > October 1 2019 which added 39 additional gravitational wave events bringing > the total number seen up to 50. The list includes the most powerful Black > Hole merger ever seen, the most distant, the largest Black Hole ever > detected by gravitational waves, 2 neutron star collisions, and something > it was either the most massive Neutron Star ever detected or the least > massive Black Hole ever detected. With all the improvements and the help of > Virgo in Italy they were finding on average one and a half events per week. > The second part of the run which went from October 2019 to March 2020 > hasn't yet had a similar statistical analysis. > > LIGO Had to be shut down prematurely in March because of the pandemic, > it's not clear when they will be able to resume operations. It's a pity > they could've have gone on a little longer because about a month after > they shut down the new KAGRA Gravitational wave detector in Japan came > online, there could have been 4 widely spaced detectors running at the > same time. Although slightly smaller than LIGO (3 km arms rather than 4) > KAGRA has several features that LIGO doesn't have, It is deep underground > which reduces seismic noise by a factor of 100, and it's mirrors are > cryogenically cooled to 20 degrees Kelvin further reducing errors. > > Compact Binary Coalescences Observed by LIGO and Virgo During the First > Half of the Third Observing Run <https://dcc.ligo.org/P2000061/public> > > John K Clark > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/67a39396-df67-4f53-856a-38925472baf4n%40googlegroups.com.
