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欧几里得. NISP信号估计器的性质与性能

Euclid. Properties and performance of the NISP signal estimator

Alma Mater Studiorum Università di Bologna(博洛尼亚大学);INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna(博洛尼亚国家天体物理研究所天文与空间科学观测站);Université Claude Bernard Lyon 1(里昂第一大学);CNRS/IN2P3, IP2I Lyon(法国国家科学研究中心/法国国家核子与粒子物理研究所,里昂粒子与宇宙学物理研究所);INFN-Bologna(博洛尼亚意大利国家核物理研究所);Université Paris-Saclay(巴黎萨克雷大学);Institut d’astrophysique spatiale(太空天体物理研究所);ESAC/ESA(欧洲空间应用中心/欧洲空间局);INAF-Osservatorio Astronomico di Brera(布雷拉天文台)
Euclid Collaboration, F. Cogato, B. Kubik, R. Barbier, S. Conseil, E. Medinaceli, Y. Copin, E. Franceschi, L. Valenziano, N. Aghanim, B. Altieri, S. Andreon, N.… 展开作者

Euclid Collaboration, F. Cogato, B. Kubik, R. Barbier, S. Conseil, E. Medinaceli, Y. Copin, E. Franceschi, L. Valenziano, N. Aghanim, B. Altieri, S. Andreon, N. Auricchio, C. Baccigalupi, M. Baldi, A. Balestra, S. Bardelli, P. Battaglia, A. Biviano, E. Branchini, M. Brescia, J. Brinchmann, S. Camera, G. Cañas-Herrera, V. Capobianco, C. Carbone, J. Carretero, S. Casas, M. Castellano, G. Castignani, S. Cavuoti, A. Cimatti, C. Colodro-Conde, G. Congedo, C. J. Conselice, L. Conversi, L. Corcione, A. Costille, F. Courbin, H. M. Courtois, R. da Silva, H. Degaudenzi, G. De Lucia, H. Dole, F. Dubath, X. Dupac, S. Dusini, A. Ealet, S. Escoffier, M. Farina, R. Farinelli, F. Faustini, S. Ferriol, F. Finelli, N. Fourmanoit, M. Frailis, M. Fumana, S. Galeotta, K. George, W. Gillard, B. Gillis, C. Giocoli, J. Gracia-Carpio, A. Grazian, F. Grupp, S. V. H. Haugan, W. Holmes, F. Hormuth, A. Hornstrup, P. Hudelot, K. Jahnke, M. Jhabvala, E. Keihänen, S. Kermiche, A. Kiessling, R. Kohley, M. Kümmel, M. Kunz, H. Kurki-Suonio, A. M. C. Le Brun, S. Ligori, P. B. Lilje, V. Lindholm, I. Lloro, G. Mainetti, D. Maino, E. Maiorano, O. Mansutti, S. Marcin, O. Marggraf, M. Martinelli, N. Martinet, F. Marulli, R. J. Massey, S. Mei, Y. Mellier, M. Meneghetti, E. Merlin, G. Meylan, A. Mora, M. Moresco, L. Moscardini, C. Neissner, S. -M. Niemi, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, W. J. Percival, V. Pettorino, S. Pires, G. Polenta, M. Poncet, L. A. Popa, F. Raison, A. Renzi, J. Rhodes, G. Riccio, E. Romelli, M. Roncarelli, C. Rosset, E. Rossetti, R. Saglia, Z. Sakr, A. G. Sánchez, D. Sapone, B. Sartoris, M. Schirmer, P. Schneider, M. Scodeggio, A. Secroun, G. Seidel, S. Serrano, P. Simon, C. Sirignano, G. Sirri, L. Stanco, J. Steinwagner, P. Tallada-Crespí, D. Tavagnacco, A. N. Taylor, I. Tereno, S. Toft, R. Toledo-Moreo, F. Torradeflot, I. Tutusaus, J. Valiviita, T. Vassallo, A. Veropalumbo, Y. Wang, J. Weller, A. Zacchei, F. M. Zerbi, E. Zucca, M. Ballardini, M. Bolzonella, E. Bozzo, C. Burigana, R. Cabanac, M. Calabrese, A. Cappi, T. Castro, J. A. Escartin Vigo, G. Fabbian, L. Gabarra, J. García-Bellido, V. Gautard, S. Hemmati, J. Macias-Perez, R. Maoli, J. Martín-Fleitas, N. Mauri, R. B. Metcalf, P. Monaco, A. Pezzotta, M. Pöntinen, I. Risso, V. Scottez, M. Sereno, M. Tenti, M. Tucci, M. Viel, M. Wiesmann, Y. Akrami, G. Alguero, I. T. Andika, G. Angora, S. Anselmi, M. Archidiacono, F. Atrio-Barandela, L. Bazzanini, D. Bertacca, M. Bethermin, F. Beutler, A. Blanchard, L. Blot, M. Bonici, S. Borgani, M. L. Brown, S. Bruton, A. Calabro, B. Camacho Quevedo, F. Caro, C. S. Carvalho, Y. Charles, A. R. Cooray, O. Cucciati, S. Davini, F. De Paolis, G. Desprez, A. Díaz-Sánchez, S. Di Domizio, J. M. Diego, V. Duret, M. Y. Elkhashab, A. Enia, Y. Fang, A. G. Ferrari, A. Finoguenov, A. Fontana, A. Franco, K. Ganga, T. Gasparetto, E. Gaztanaga, F. Giacomini, F. Gianotti, G. Gozaliasl, A. Gruppuso, M. Guidi, C. M. Gutierrez, A. Hall, H. Hildebrandt, J. Hjorth, J. J. E. Kajava, Y. Kang, V. Kansal, D. Karagiannis, K. Kiiveri, J. Kim, C. C. Kirkpatrick, S. Kruk, M. Lattanzi, L. Legrand, F. Lepori, G. Leroy, G. F. Lesci, J. Lesgourgues, T. I. Liaudat, M. Magliocchetti, A. Manjón-García, F. Mannucci, C. J. A. P. Martins, L. Maurin, M. Miluzio, A. Montoro, C. Moretti, G. Morgante, S. Nadathur, K. Naidoo, P. Natoli, A. Navarro-Alsina, S. Nesseris, L. Pagano, E. Palazzi, D. Paoletti, F. Passalacqua, K. Paterson, L. Patrizii, A. Pisani, D. Potter, G. W. Pratt, S. Quai, M. Radovich, W. Roster, S. Sacquegna, M. Sahlén, D. B. Sanders, E. Sarpa, A. Schneider, D. Sciotti, E. Sellentin, L. C. Smith, K. Tanidis, F. Tarsitano, G. Testera, R. Teyssier, S. Tosi, A. Troja, A. Venhola, D. Vergani, G. Verza, P. Vielzeuf, S. Vinciguerra, N. A. Walton, A. H. Wright

AI总结:

本文研究了欧几里得任务中NISP信号估计器的性质与性能,通过蒙特卡洛模拟和飞行数据测试,验证了其在近红外信号处理中的准确性和鲁棒性。

摘要:

欧几里得航天器位于太阳-地球系统的第二拉格朗日点,搭载了近红外光谱仪和光度计(NISP)仪器。NISP配备了16个基于汞镉碲的探测器阵列,用于获取近红外光度和光谱数据。为了满足航天器对计算资源和 telemetry 信道带宽的限制,近红外信号通过专用的软硬件架构在航天器上进行处理,以满足欧几里得数据质量的严格要求。一个定制的应用软件在NISP数据处理单元上运行,实现了NISP信号估计器:一种定制算法,能够提供准确的流量测量,并同时通过质量因子参数估计信号估计的质量。本文通过评估NISP仪器早期飞行操作期间的性能,研究NISP信号估计器的性质。首先,我们回顾了近红外信号推断所基于的假设,并通过蒙特卡洛模拟研究信号估计器的主要系统误差来源。然后,我们测试了NISP信号估计器的飞行性能。结果表明,对于99%的NISP像素阵列,系统偏差低于0.01 e/s,远低于估计信号的噪声预算。我们还推导了NISP信号估计器方差的解析表达式,证明了其有效性,特别是在协方差矩阵未预先计算的情况下。最后,我们提供了一个稳健的统计框架来解释QF参数,分析其对信号估计器偏差的依赖性,并展示其对NISP探测器中宇宙射线击中敏感性。我们的发现支持了关于NISP信号估计器的先前结果,并建议基于飞行数据与模拟之间的一致性进行主要修正。

英文摘要:

The Euclid spacecraft, located at the second Lagrangian point of the Sun-Earth system, hosts the Near-Infrared Spectrometer and Photometer (NISP) instrument. NISP is equipped with a mosaic of 16 HgCdTe-based detectors to acquire near-infrared photometric and spectroscopic data. To meet the spacecraft's constraints on computational resources and telemetry bandwidth, the near-infrared signal is processed onboard via a dedicated hardware-software architecture designed to fulfil the stringent Euclid's data-quality requirements. A custom application software, running on the two NISP data processing units, implements the NISP signal estimator: an ad-hoc algorithm which delivers accurate flux measurements and simultaneously estimates the quality of signal estimation through the quality factor parameter. This paper investigates the properties of the NISP signal estimator by evaluating its performance during the early flight operations of the NISP instrument. First, we revisit the assumptions on which the inference of the near-infrared signal is based and investigate the origin of the main systematics of the signal estimator through Monte Carlo simulations. Then, we test the flight performance of the NISP signal estimator. Results indicate a systematic bias lower than 0.01 e/s for 99% of the NISP pixel array, well within the noise budget of the estimated signal. We also derive an analytical expression for the variance of the NISP signal estimator, demonstrating its validity, particularly when the covariance matrix is not pre-computed. Finally, we provide a robust statistical framework to interpret the QF parameter, analyse its dependence on the signal estimator bias, and show its sensitivity to cosmic ray hits on NISP detectors. Our findings corroborate previous results on the NISP signal estimator and suggest a leading-order correction based on the agreement between flight data and simulations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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