Planck 2013 结果。IV. 低频仪器波束与窗函数
宇宙学与河外天体物理
2015-06-15 v2 天体物理仪器与方法
摘要
本文介绍了 Planck 低频仪器（LFI）在轨波束、波束窗函数及相关不确定性的表征。了解波束轮廓对于确定从观测到的天空各向异性功率谱到实际天空各向异性功率谱的传递函数是必要的。主波束畸变会影响波束窗函数，使高多重极处的各向异性功率谱重构复杂化，而旁瓣则影响低和中等多重极。LFI 主波束的在轨评估依赖于木星观测期间进行的测量。通过叠加多次木星凌日的数据，在 30 和 44 GHz 处主波束轮廓被测量至 -20 dB，在 70 GHz 处至 -25 dB。每个 LFI 频带的主波束立体角确定精度优于 0.2%。Planck 发射前的光学模型经过适当调整，可独立于任何噪声效应来表征主波束。这种方法提供了一个光学模型，其波束在主波束区域完全复现测量结果，同时也允许描述低于木星测量本身所能达到的功率水平的波束。模拟波束与测量波束在每个 LFI 频带的一致性优于 1%。模拟波束用于计算有效波束的窗函数。窗函数的误差预算估计自主波束和旁瓣贡献，并考虑了辐射计频带形状。有效波束窗函数的总不确定性为：在 处，30 和 44 GHz 分别为 2% 和 1.2%；在 处，70 GHz 为 0.7%。
引用
@article{arxiv.1303.5065,
title = {Planck 2013 results. IV. Low Frequency Instrument beams and window functions},
author = {Planck Collaboration and N. Aghanim and C. Armitage-Caplan and M. Arnaud and M. Ashdown and F. Atrio-Barandela and J. Aumont and C. Baccigalupi and A. J. Banday and R. B. Barreiro and E. Battaner and K. Benabed and A. Benoît and A. Benoit-Lévy and J. -P. Bernard and M. Bersanelli and P. Bielewicz and J. Bobin and J. J. Bock and A. Bonaldi and J. R. Bond and J. Borrill and F. R. Bouchet and M. Bridges and M. Bucher and C. Burigana and R. C. Butler and J. -F. Cardoso and A. Catalano and A. Chamballu and L. -Y Chiang and P. R. Christensen and S. Church and S. Colombi and L. P. L. Colombo and B. P. Crill and A. Curto and F. Cuttaia and L. Danese and R. D. Davies and R. J. Davis and P. de Bernardis and A. de Rosa and G. de Zotti and J. Delabrouille and C. Dickinson and J. M. Diego and H. Dole and S. Donzelli and O. Doré and M. Douspis and X. Dupac and G. Efstathiou and T. A. Enßlin and H. K. Eriksen and F. Finelli and O. Forni and M. Frailis and E. Franceschi and T. C. Gaier and S. Galeotta and K. Ganga and M. Giard and Y. Giraud-Héraud and J. González-Nuevo and K. M. Górski and S. Gratton and A. Gregorio and A. Gruppuso and F. K. Hansen and D. Hanson and D. Harrison and S. Henrot-Versillé and C. Hernández-Monteagudo and D. Herranz and S. R. Hildebrandt and E. Hivon and M. Hobson and W. A. Holmes and A. Hornstrup and W. Hovest and K. M. Huffenberger and A. H. Jaffe and T. R. Jaffe and J. Jewell and W. C. Jones and M. Juvela and P. Kangaslahti and E. Keihänen and R. Keskitalo and K. Kiiveri and T. S. Kisner and J. Knoche and L. Knox and M. Kunz and H. Kurki-Suonio and G. Lagache and A. Lähteenmäki and J. -M. Lamarre and A. Lasenby and R. J. Laureijs and C. R. Lawrence and J. P. Leahy and R. Leonardi and J. Lesgourgues and M. Liguori and P. B. Lilje and M. Linden-Vørnle and V. Lindholm and M. López-Caniego and P. M. Lubin and J. F. Macías-Pérez and D. Maino and N. Mandolesi and M. Maris and D. J. Marshall and P. G. Martin and E. Martínez-González and S. Masi and M. Massardi and S. Matarrese and F. Matthai and P. Mazzotta and P. R. Meinhold and A. Melchiorri and L. Mendes and A. Mennella and M. Migliaccio and S. Mitra and A. Moneti and L. Montier and G. Morgante and D. Mortlock and A. Moss and D. Munshi and P. Naselsky and P. Natoli and C. B. Netterfield and H. U. Nørgaard-Nielsen and D. Novikov and I. Novikov and I. J. O'Dwyer and S. Osborne and F. Paci and L. Pagano and D. Paoletti and B. Partridge and F. Pasian and G. Patanchon and O. Perdereau and L. Perotto and F. Perrotta and E. Pierpaoli and D. Pietrobon and S. Plaszczynski and P. Platania and E. Pointecouteau and G. Polenta and N. Ponthieu and L. Popa and T. Poutanen and G. W. Pratt and G. Prézeau and S. Prunet and J. -L. Puget and J. P. Rachen and R. Rebolo and M. Reinecke and M. Remazeilles and S. Ricciardi and T. Riller and G. Rocha and C. Rosset and G. Roudier and J. A. Rubiño-Martín and B. Rusholme and M. Sandri and D. Santos and D. Scott and M. D. Seiffert and E. P. S. Shellard and L. D. Spencer and J. -L. Starck and V. Stolyarov and R. Stompor and F. Sureau and D. Sutton and A. -S. Suur-Uski and J. -F. Sygnet and J. A. Tauber and D. Tavagnacco and L. Terenzi and L. Toffolatti and M. Tomasi and M. Tristram and M. Tucci and J. Tuovinen and M. Türler and G. Umana and L. Valenziano and J. Valiviita and B. Van Tent and J. Varis and P. Vielva and F. Villa and N. Vittorio and L. A. Wade and B. D. Wandelt and A. Zacchei and A. Zonca},
journal= {arXiv preprint arXiv:1303.5065},
year = {2015}
}