Discovery of linear asymptotic behaviour at micro-Kelvin resolution in a modulated Rayleigh–Bénard chamber

Putten, Maurice H. P. M. van; Putten, Anton F P. van

doi:10.1098/rspa.2007.1894

Cited by 4 publications

(1 citation statement)

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“…Foster 1995). Our task was distributed over various personal computers using a cloud operating system originally developed for remote sensing (van Putten, & van Putten 2007); any other software for distributed computing on multi-core systems (e.g. Mighell 2012;Singh et al 2013) will serve the same purpose, to realize essentially optimal sensitivity by exploiting a diversity in modern supercomputing configurations.…”

Section: Discussionmentioning

confidence: 99%

Directed searches for broadband extended gravitational-wave emission in nearby energetic core-collapse supernovae

Van Putten

2016

Preprint

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Core-collapse supernovae are factories of neutron stars and stellar mass black holes. Type Ib/c supernovae stand out as potentially originating in relatively compact stellar binaries and their branching ratio of about 1% into long gamma-ray bursts. The most energetic events probably derive from central engines harboring rapidly rotating black holes, wherein accretion of fall-back matter down to the Inner Most Stable Circular Orbit (ISCO) offers a window to broadband extended gravitational-wave emission (BEGE). To search for BEGE, we introduce a butterfly filter in time-frequency space by Time Sliced Matched Filtering. To analyze long epochs of data, we propose using coarse grained searches followed by high resolution searches on events of interest. We illustrate our proposed coarse grained search on two weeks of LIGO S6 data prior to SN 2010br (z = 0.002339) using a bank of up to 64 thousand templates of one second duration covering a broad range in chirp frequencies and bandwidth. Correlating events with signal-to-noise ratios > 6 from the LIGO L1 and H1 detectors each reduces to a few events of interest. Lacking any further properties reflecting a common excitation by broadband gravitational radiation, we disregarded these as spurious. This new pipeline may be used to systematically search for long duration chirps in nearby corecollapse supernovae from robotic optical transient surveys using embarrassingly parallel computing.

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Section: Discussionmentioning

confidence: 99%