Gaia Data Release 1: On-orbit performance of the Gaia CCDs at L2

Research output: Contribution to journalArticle

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Gaia Data Release 1 : On-orbit performance of the Gaia CCDs at L2. / Crowley, C.; Kohley, R.; Hambly, N. C.; Davidson, M.; Abreu, A.; Van Leeuwen, F.; Fabricius, C.; Seabroke, G.; De Bruijne, J. H J; Short, A.; Lindegren, L.; Brown, A. G A; Sarri, G.; Gare, P.; Prusti, T.; Prod'homme, T.; Mora, A.; Martín-Fleitas, J.; Raison, F.; Lammers, U.; O'Mullane, W.; Jansen, F.

In: Astronomy and Astrophysics, Vol. 595, A6, 01.11.2016.

Research output: Contribution to journalArticle

Harvard

Crowley, C, Kohley, R, Hambly, NC, Davidson, M, Abreu, A, Van Leeuwen, F, Fabricius, C, Seabroke, G, De Bruijne, JHJ, Short, A, Lindegren, L, Brown, AGA, Sarri, G, Gare, P, Prusti, T, Prod'homme, T, Mora, A, Martín-Fleitas, J, Raison, F, Lammers, U, O'Mullane, W & Jansen, F 2016, 'Gaia Data Release 1: On-orbit performance of the Gaia CCDs at L2', Astronomy and Astrophysics, vol. 595, A6. https://doi.org/10.1051/0004-6361/201628990

APA

Crowley, C., Kohley, R., Hambly, N. C., Davidson, M., Abreu, A., Van Leeuwen, F., ... Jansen, F. (2016). Gaia Data Release 1: On-orbit performance of the Gaia CCDs at L2. Astronomy and Astrophysics, 595, [A6]. https://doi.org/10.1051/0004-6361/201628990

CBE

Crowley C, Kohley R, Hambly NC, Davidson M, Abreu A, Van Leeuwen F, Fabricius C, Seabroke G, De Bruijne JHJ, Short A, Lindegren L, Brown AGA, Sarri G, Gare P, Prusti T, Prod'homme T, Mora A, Martín-Fleitas J, Raison F, Lammers U, O'Mullane W, Jansen F. 2016. Gaia Data Release 1: On-orbit performance of the Gaia CCDs at L2. Astronomy and Astrophysics. 595. https://doi.org/10.1051/0004-6361/201628990

MLA

Vancouver

Crowley C, Kohley R, Hambly NC, Davidson M, Abreu A, Van Leeuwen F et al. Gaia Data Release 1: On-orbit performance of the Gaia CCDs at L2. Astronomy and Astrophysics. 2016 Nov 1;595. A6. https://doi.org/10.1051/0004-6361/201628990

Author

Crowley, C. ; Kohley, R. ; Hambly, N. C. ; Davidson, M. ; Abreu, A. ; Van Leeuwen, F. ; Fabricius, C. ; Seabroke, G. ; De Bruijne, J. H J ; Short, A. ; Lindegren, L. ; Brown, A. G A ; Sarri, G. ; Gare, P. ; Prusti, T. ; Prod'homme, T. ; Mora, A. ; Martín-Fleitas, J. ; Raison, F. ; Lammers, U. ; O'Mullane, W. ; Jansen, F. / Gaia Data Release 1 : On-orbit performance of the Gaia CCDs at L2. In: Astronomy and Astrophysics. 2016 ; Vol. 595.

RIS

TY - JOUR

T1 - Gaia Data Release 1

T2 - On-orbit performance of the Gaia CCDs at L2

AU - Crowley, C.

AU - Kohley, R.

AU - Hambly, N. C.

AU - Davidson, M.

AU - Abreu, A.

AU - Van Leeuwen, F.

AU - Fabricius, C.

AU - Seabroke, G.

AU - De Bruijne, J. H J

AU - Short, A.

AU - Lindegren, L.

AU - Brown, A. G A

AU - Sarri, G.

AU - Gare, P.

AU - Prusti, T.

AU - Prod'homme, T.

AU - Mora, A.

AU - Martín-Fleitas, J.

AU - Raison, F.

AU - Lammers, U.

AU - O'Mullane, W.

AU - Jansen, F.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - The European Space Agency's Gaia satellite was launched into orbit around L2 in December 2013 with a payload containing 106 large-format scientific CCDs. The primary goal of the mission is to repeatedly obtain high-precision astrometric and photometric measurements of one thousand million stars over the course of five years. The scientific value of the down-linked data, and the operation of the onboard autonomous detection chain, relies on the high performance of the detectors. As Gaia slowly rotates and scans the sky, the CCDs are continuously operated in a mode where the line clock rate and the satellite rotation spin-rate are in synchronisation. Nominal mission operations began in July 2014 and the first data release is being prepared for release at the end of Summer 2016. In this paper we present an overview of the focal plane, the detector system, and strategies for on-orbit performance monitoring of the system. This is followed by a presentation of the performance results based on analysis of data acquired during a two-year window beginning at payload switch-on. Results for parameters such as readout noise and electronic offset behaviour are presented and we pay particular attention to the effects of the L2 radiation environment on the devices. The radiation-induced degradation in the charge transfer efficiency (CTE) in the (parallel) scan direction is clearly diagnosed; however, an extrapolation shows that charge transfer inefficiency (CTI) effects at end of mission will be approximately an order of magnitude less than predicted pre-flight. It is shown that the CTI in the serial register (horizontal direction) is still dominated by the traps inherent to the manufacturing process and that the radiation-induced degradation so far is only a few per cent. We also present results on the tracking of ionising radiation damage and hot pixel evolution. Finally, we summarise some of the detector effects discovered on-orbit which are still being investigated.

AB - The European Space Agency's Gaia satellite was launched into orbit around L2 in December 2013 with a payload containing 106 large-format scientific CCDs. The primary goal of the mission is to repeatedly obtain high-precision astrometric and photometric measurements of one thousand million stars over the course of five years. The scientific value of the down-linked data, and the operation of the onboard autonomous detection chain, relies on the high performance of the detectors. As Gaia slowly rotates and scans the sky, the CCDs are continuously operated in a mode where the line clock rate and the satellite rotation spin-rate are in synchronisation. Nominal mission operations began in July 2014 and the first data release is being prepared for release at the end of Summer 2016. In this paper we present an overview of the focal plane, the detector system, and strategies for on-orbit performance monitoring of the system. This is followed by a presentation of the performance results based on analysis of data acquired during a two-year window beginning at payload switch-on. Results for parameters such as readout noise and electronic offset behaviour are presented and we pay particular attention to the effects of the L2 radiation environment on the devices. The radiation-induced degradation in the charge transfer efficiency (CTE) in the (parallel) scan direction is clearly diagnosed; however, an extrapolation shows that charge transfer inefficiency (CTI) effects at end of mission will be approximately an order of magnitude less than predicted pre-flight. It is shown that the CTI in the serial register (horizontal direction) is still dominated by the traps inherent to the manufacturing process and that the radiation-induced degradation so far is only a few per cent. We also present results on the tracking of ionising radiation damage and hot pixel evolution. Finally, we summarise some of the detector effects discovered on-orbit which are still being investigated.

KW - Astrometry

KW - Instrumentation: detectors

KW - Methods: data analysis

KW - Space vehicles: instruments

UR - http://www.scopus.com/inward/record.url?scp=84998673854&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201628990

DO - 10.1051/0004-6361/201628990

M3 - Article

VL - 595

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 1432-0746

M1 - A6

ER -