RadioAstron gravitational redshift experiment: status update

D.A. Litvinov; U. Bach; N. Bartel; K.G. Belousov; M. Bietenholz; A.V. Biriukov; G Cimo; D. A. Duev; L. I. Gurvits; A.V. Gusev; R Haas; V.L. Kauts; B.Z. Kanevsky; A.V. Kovalenko; G Kronschnabl; V.V. Kulagin; Maria Lindqvist; G Molera Calves; A. Neidhardt; C. Plotz; S. V. Pogrebenko; N.K. Porayko; V.N. Rudenko; K. V. Sokolovsky; A.I. Smirnov; V.A. Stepanyants; J. Yang; M.V. Zakhvatkin

RadioAstron gravitational redshift experiment: status update

D.A. Litvinov, U. Bach, N. Bartel, K.G. Belousov, M. Bietenholz, A.V. Biriukov, G Cimo, D. A. Duev, L. I. Gurvits, A.V. Gusev, R Haas, V.L. Kauts, B.Z. Kanevsky, A.V. Kovalenko, G Kronschnabl, V.V. Kulagin, Maria Lindqvist, G Molera Calves, A. Neidhardt, C. PlotzS. V. Pogrebenko, N.K. Porayko, V.N. Rudenko, K. V. Sokolovsky, A.I. Smirnov, V.A. Stepanyants, J. Yang, M.V. Zakhvatkin

Astrodynamics & Space Missions

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Abstract

A test of a cornerstone of general relativity, the gravitational redshift effect, is currently being conducted with the RadioAstron spacecraft, which is on a highly eccentric orbit around Earth. Using ground radio telescopes to record the spacecraft signal, synchronized to its ultra-stable on-board H-maser, we can probe the varying flow of time on board with unprecedented accuracy. The observations performed so far, currently being analyzed, have already allowed us to measure the effect with a relative accuracy of 4 × 10−4 . We expect to reach 2.5×10−5 with additional observations in 2016, an improvement of almost a magnitude over the 40-year old result of the GP-A mission.

Original language	English
Title of host publication	Proceedings of the Fourteenth Marcel Grossman Meeting on General Relativity
Editors	M. Bianchi, R.T. Jantzen, R. Ruffini
Number of pages	5
Publication status	Published - 20 Mar 2016
Event	14th Marcel Grossmann Meeting - Rome, Italy Duration: 12 Jul 2015 → 18 Jul 2015 Conference number: 14 http://www.icra.it/mg/mg14/proceedings.htm

Conference

Conference	14th Marcel Grossmann Meeting
Abbreviated title	MG14
Country/Territory	Italy
City	Rome
Period	12/07/15 → 18/07/15
Internet address	http://www.icra.it/mg/mg14/proceedings.htm

Keywords

galaxies: active
galaxies: jets
quasars: individual (3C273)
radio continuum: galaxies
techniques: interferometric

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Litvinov, D. A., Bach, U., Bartel, N., Belousov, K. G., Bietenholz, M., Biriukov, A. V., Cimo, G., Duev, D. A., Gurvits, L. I., Gusev, A. V., Haas, R., Kauts, V. L., Kanevsky, B. Z., Kovalenko, A. V., Kronschnabl, G., Kulagin, V. V., Lindqvist, M., Molera Calves, G., Neidhardt, A., ... Zakhvatkin, M. V. (2016). RadioAstron gravitational redshift experiment: status update. In M. Bianchi, R. T. Jantzen, & R. Ruffini (Eds.), Proceedings of the Fourteenth Marcel Grossman Meeting on General Relativity

@inproceedings{f1e2875d388e4caba4c4fc4c9cd36b40,

title = "RadioAstron gravitational redshift experiment: status update",

abstract = "A test of a cornerstone of general relativity, the gravitational redshift effect, is currently being conducted with the RadioAstron spacecraft, which is on a highly eccentric orbit around Earth. Using ground radio telescopes to record the spacecraft signal, synchronized to its ultra-stable on-board H-maser, we can probe the varying flow of time on board with unprecedented accuracy. The observations performed so far, currently being analyzed, have already allowed us to measure the effect with a relative accuracy of 4 × 10−4 . We expect to reach 2.5×10−5 with additional observations in 2016, an improvement of almost a magnitude over the 40-year old result of the GP-A mission.",

keywords = "galaxies: active, galaxies: jets, quasars: individual (3C273), radio continuum: galaxies, techniques: interferometric",

author = "D.A. Litvinov and U. Bach and N. Bartel and K.G. Belousov and M. Bietenholz and A.V. Biriukov and G Cimo and Duev, {D. A.} and Gurvits, {L. I.} and A.V. Gusev and R Haas and V.L. Kauts and B.Z. Kanevsky and A.V. Kovalenko and G Kronschnabl and V.V. Kulagin and Maria Lindqvist and {Molera Calves}, G and A. Neidhardt and C. Plotz and Pogrebenko, {S. V.} and N.K. Porayko and V.N. Rudenko and Sokolovsky, {K. V.} and A.I. Smirnov and V.A. Stepanyants and J. Yang and M.V. Zakhvatkin",

year = "2016",

month = mar,

day = "20",

language = "English",

editor = "{ Bianchi}, M. and R.T. Jantzen and R. Ruffini",

booktitle = "Proceedings of the Fourteenth Marcel Grossman Meeting on General Relativity",

note = "14th Marcel Grossmann Meeting, MG14 ; Conference date: 12-07-2015 Through 18-07-2015",

url = "http://www.icra.it/mg/mg14/proceedings.htm",

}

Litvinov, DA, Bach, U, Bartel, N, Belousov, KG, Bietenholz, M, Biriukov, AV, Cimo, G, Duev, DA, Gurvits, LI, Gusev, AV, Haas, R, Kauts, VL, Kanevsky, BZ, Kovalenko, AV, Kronschnabl, G, Kulagin, VV, Lindqvist, M, Molera Calves, G, Neidhardt, A, Plotz, C, Pogrebenko, SV, Porayko, NK, Rudenko, VN, Sokolovsky, KV, Smirnov, AI, Stepanyants, VA, Yang, J & Zakhvatkin, MV 2016, RadioAstron gravitational redshift experiment: status update. in M Bianchi, RT Jantzen & R Ruffini (eds), Proceedings of the Fourteenth Marcel Grossman Meeting on General Relativity. 14th Marcel Grossmann Meeting, Rome, Italy, 12/07/15.

TY - GEN

T1 - RadioAstron gravitational redshift experiment

T2 - 14th Marcel Grossmann Meeting

AU - Litvinov, D.A.

AU - Bach, U.

AU - Bartel, N.

AU - Belousov, K.G.

AU - Bietenholz, M.

AU - Biriukov, A.V.

AU - Cimo, G

AU - Duev, D. A.

AU - Gurvits, L. I.

AU - Gusev, A.V.

AU - Haas, R

AU - Kauts, V.L.

AU - Kanevsky, B.Z.

AU - Kovalenko, A.V.

AU - Kronschnabl, G

AU - Kulagin, V.V.

AU - Lindqvist, Maria

AU - Molera Calves, G

AU - Neidhardt, A.

AU - Plotz, C.

AU - Pogrebenko, S. V.

AU - Porayko, N.K.

AU - Rudenko, V.N.

AU - Sokolovsky, K. V.

AU - Smirnov, A.I.

AU - Stepanyants, V.A.

AU - Yang, J.

AU - Zakhvatkin, M.V.

N1 - Conference code: 14

PY - 2016/3/20

Y1 - 2016/3/20

N2 - A test of a cornerstone of general relativity, the gravitational redshift effect, is currently being conducted with the RadioAstron spacecraft, which is on a highly eccentric orbit around Earth. Using ground radio telescopes to record the spacecraft signal, synchronized to its ultra-stable on-board H-maser, we can probe the varying flow of time on board with unprecedented accuracy. The observations performed so far, currently being analyzed, have already allowed us to measure the effect with a relative accuracy of 4 × 10−4 . We expect to reach 2.5×10−5 with additional observations in 2016, an improvement of almost a magnitude over the 40-year old result of the GP-A mission.

AB - A test of a cornerstone of general relativity, the gravitational redshift effect, is currently being conducted with the RadioAstron spacecraft, which is on a highly eccentric orbit around Earth. Using ground radio telescopes to record the spacecraft signal, synchronized to its ultra-stable on-board H-maser, we can probe the varying flow of time on board with unprecedented accuracy. The observations performed so far, currently being analyzed, have already allowed us to measure the effect with a relative accuracy of 4 × 10−4 . We expect to reach 2.5×10−5 with additional observations in 2016, an improvement of almost a magnitude over the 40-year old result of the GP-A mission.

KW - galaxies: active

KW - galaxies: jets

KW - quasars: individual (3C273)

KW - radio continuum: galaxies

KW - techniques: interferometric

UR - http://resolver.tudelft.nl/uuid:f1e2875d-388e-4cab-a4c4-fc4c9cd36b40

M3 - Conference contribution

BT - Proceedings of the Fourteenth Marcel Grossman Meeting on General Relativity

A2 - Bianchi, M.

A2 - Jantzen, R.T.

A2 - Ruffini, R.

Y2 - 12 July 2015 through 18 July 2015

ER -

RadioAstron gravitational redshift experiment: status update

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Conference

Keywords

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