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The Mario Schenberg (Gravitational Wave Detector, or Brazilian Graviton Project[1] or Graviton) is a spherical, resonant-mass, gravitational wave detector formerly run by the Physics Institute of the University of Sao Paulo, named after Mário Schenberg. Similar to the Dutch-run MiniGrail, the 1.15 ton, 65 cm diameter spherical test mass is suspended in a cryogenic vacuum enclosure, kept at 20 mK; and the sensors (transducers) for this detector/antenna are developed at the National Institute for Space Research (INPE), in Sao José dos Campos, Brazil.[2][3] As of 2016, the antenna has not detected any gravitational waves, and development of the antenna continues. It has been decided that the antenna will be transferred from the University of Sao Paulo to INPE. [4]
References

Aguiar; et al. (October 2002). "The status of the Brazilian spherical detector". Class. Quantum Grav. 19 (1949): 1949–1953. Bibcode:2002CQGra..19.1949A. doi:10.1088/0264-9381/19/7/397.
Aguiar; et al. (April 2005). "The Brazilian gravitational wave detector Mario Schenberg: progress and plans". Class. Quantum Grav. 22 (10): S209–S214. Bibcode:2005CQGra..22S.209A. CiteSeerX 10.1.1.497.325. doi:10.1088/0264-9381/22/10/011.
Aguiar; et al. (May 2008). "The Schenberg spherical gravitational wave detector: the first commissioning runs". Class. Quantum Grav. 25 (11): 114042. Bibcode:2008CQGra..25k4042A. doi:10.1088/0264-9381/25/11/114042.
Aguiar; et al. (October 2016). "The Mario Schenberg Gravitational Wave Antenna". Brazilian Journal of Physics. 46 (5): 596–603. doi:10.1007/s13538-016-0436-1.

vte

Gravitational-wave astronomy

Gravitational wave Gravitational-wave observatory

Detectors
Resonant mass
antennas
Active

NAUTILUS (IGEC) AURIGA (IGEC) MiniGRAIL Mario Schenberg

Past

EXPLORER (IGEC) ALLEGRO (IGEC) NIOBE (IGEC) Stanford gravitational wave detector ALTAIR GEOGRAV AGATA Weber bar

Proposed

TOBA

Past proposals

GRAIL (downsized to MiniGRAIL) TIGA SFERA Graviton (downsized to Mario Schenberg)

Ground-based
Interferometers
Active

AIGO (ACIGA) CLIO Fermilab holometer GEO600 Advanced LIGO (LIGO Scientific Collaboration) KAGRA Advanced Virgo (European Gravitational Observatory)

Past

TAMA 300 TAMA 20, later known as LISM TENKO-100 Caltech 40m interferometer

Planned

INDIGO (LIGO-India)

Proposed

Cosmic Explorer Einstein Telescope

Past proposals

AIGO (LIGO-Australia)

Space-based
interferometers
Planned

LISA

Proposed

Big Bang Observer DECIGO TianQin

Pulsar timing arrays

EPTA IPTA NANOGrav PPTA

Data analysis

Einstein@Home PyCBC Zooniverse: Gravity Spy

Observations
Events

List of observations First observation (GW150914) GW151012 GW151226 GW170104 GW170608 GW170729 GW170809 GW170814 GW170817 (first neutron star merger) GW170818 GW170823 GW190412 GW190521 (first-ever light from bh-bh merger) GW190814 (first-ever "mass gap" collision)

Methods

Direct detection
Laser interferometers Resonant mass detectors Proposed: Atom interferometers Indirect detection
B-modes of CMB Pulsar timing array Binary pulsar

Theory

General relativity Tests of general relativity Metric theories Graviton

Effects / properties

Polarization Spin-flip Redshift Travel with speed of light h strain Chirp signal (chirp mass) Carried energy

Types / sources

Stochastic
Cosmic inflation-quantum fluctuation Phase transition Binary inspiral
Supermassive black holes Stellar black holes Neutron stars EMRI Continuous
Rotating neutron star Burst
Supernova or from unknown sources Hypothesis
Colliding cosmic string and other unknown sources

Physics Encyclopedia

World

Index

Hellenica World - Scientific Library

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