An important milestone was just achieved during the recent GWDAW 2002 meeting in Kyoto, Japan. After almost a year of discussion between the LIGO Laboratory, the LIGO Scientific Collaboration (LSC) and the Japanese gravitational wave detection project, the TAMA300, an attachment to the LIGO-TAMA Memorandum of Understanding (MOU) was signed that officially commences a collaboration on joint analysis of data taken simultaneously by the two organizations.
The initial effort will focus on joint analysis of a 9-plus
hour segment of coincident data taken during LIGO's
runs in August-September 2002.
This data set constitutes a testbed for prototyping joint
analysis approaches. Plans are also being made to run
simultaneously during the upcoming two-month-long LIGO S2
and TAMA DT8 runs in February-April 2003.
The initial searches to be conducted in collaboration
will target unmodeled signals from bursts or transient
sources (explosive gravitational wave signals from sources
unexpected or unpredicted, a particularly challenging signal
to hunt), and chirps from binary inspiral coalescences (the
much sought collisions of neutron stars or black holes that
spiral into one another as their orbits decay with the emission
of gravitational waves). At the present time, TAMA and
are also defining an MOU to enable data from the two groups to be
analyzed together. LIGO concluded an earlier agreement with GEO
and data taken together is now being jointly analyzed. The
upcoming S2/DT8 runs will incorporate data from a total of
five interferometers arrayed around the globe: three from LIGO,
plus the GEO600, and the TAMA300. The commitment among these
interferometer groups to work in collaboration assures that
the laser interferometers now in operation will utilize their
sensitivities in the most optimal manner.
Updated on 05.06.2003
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