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Дата изменения: Fri Apr 2 13:54:52 1999
Дата индексирования: Tue Oct 2 12:05:06 2012
Кодировка:
All-Moscow Seminar of Astrophysicists
(ASA)
The seminar is supported by the grant of Federal Programm "Integration"annotation of talk V.N.Rudenko, A.V.Gusev, V.K.Kravchuk, M.P.Vinogradov (SAI)
"Search for correlation of gravitational detector noise background with
astrophysical events accompanied by neutrino and gamma radiation"
A new approach in the gravitational wave experiment is considered.
In addition to the old method of searching for coincident reaction
of two separated gravitational antennae it is proposed to seek
perturbations of the gravitational detector noise background correlated
with astrophysical events such as neutrino and gamma ray bursts registered
by correspondent detectors. The reason of this approach lies in
understanding
that last stages of stellar evolution such as a binary coalescence,
supernova
explosion, collapse, traditionally considered as gravitational burst
sources,
should be accompanied also neutrino and very likely gamma radiation.
It means in general that a detection of neutrino or gamma ray bursts defines
time marks around which one might hope to find also gravitational detector
exitations. An advantage of this method consists first of all in a
remarkable
reduction of the observational time interval and second in a potentional
opportunity to accumulate week gravitational signals. A list of desirable
events at present can be provided by four world neutrino telescops and
cosmic CGRO and BepoSAX satellites. In this situation one has to formulate
an joint optimal data processing algorithm for gravitational detector output
with parallel records of neutrino and gamma ray observatories. A simple
searching for coincidences is insufficient due to an inevitable unknown
time deay between events of different nature but mainly due to a deficit of
gravitational and neutrino detector sensitivity. It has to be done according
to the optimal filtration theory taking into account available information
of noise and conceivable model of signal. A first version of such optimal
algorithm is presented in this report. Its efficiency is demonstrated in
reanalysis of the old data concerning the phenomenon of neutrino-gravity
correlation registered during of SN1987A explosion.