THE BOSS Lyα FOREST SAMPLE FROM SDSS DATA RELEASE 9
THE BOSS Lyα FOREST SAMPLE FROM SDSS DATA RELEASE 9
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SDSS 数据发布 9 中的 BOSS Lyα 森林样本
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
B. Weaver
中科院分区：
文献类型：
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作者：
K. Lee;S. Bailey;L. Bartsch;W. Carithers;K. Dawson;D. Kirkby;B. Lundgren;D. Margala;N. Palanque;M. Pieri;D. Schlegel;D. Weinberg;C. Yéche;E. Aubourg;J. Bautista;D. Bizyaev;M. Blomqvist;A. Bolton;A. Borde;H. Brewington;N. Busca;R. Croft;T. Delubac;G. Ebelke;D. Eisenstein;A. Font;J. Ge;J. Hamilton;J. Hennawi;S. Ho;K. Honscheid;J. Le Goff;E. Malanushenko;V. Malanushenko;J. Miralda;A. Myers;P. Noterdaeme;D. Oravetz;K. Pan;I. Pâris;P. Petitjean;J. Rich;E. Rollinde;N. Ross;G. Rossi;D. Schneider;A. Simmons;S. Snedden;A. Slosar;D. Spergel;N. Suzuki;M. Viel;B. Weaver
我们给出了来自SDSS数据发布9的Boss Lyman-α(Lyα)森林样本，包括54,468个类星体光谱，其中zqso>；2.15适用于Lyα森林分析。这个数据集探测星际介质，在3275°2的区域内吸收红移2.0<；zα<；5.7，包含大约20 h−3 GPC3的共转体积。对于每个频谱，我们都包括了几个旨在帮助进行Lyα森林分析的产品：改进的天空掩模，用于标记数据可能不可靠的像素；对管道中的已知偏差进行修正；估计噪声；对衰减的Lyα系统的核心进行掩模；对其机翼进行修正；以及对未吸收的连续体的估计，以便可以将观测到的通量转换为分数透射率。利用与静止框架Lyα(λ>的类星体光谱相匹配的主分量导出连续体，将其外推到森林区域，并用线性函数进行归一化以适应Lyα森林平均通量的预期演变。估计的连续体误差为≲5%RMS。我们还讨论了由不确定的分光光度和通量校准中的伪影引起的可能的系统学；提供了对后者的全局校正。我们的样本为用户分析BOSS Lyα森林数据中的集群提供了一个方便的起点，并且它提供了一个基准数据集，可用于比较Lyα森林中不同重子声振荡分析的结果。完整的数据集可从SDSS-III DR9网站获得。
We present the BOSS Lyman-α (Lyα) Forest Sample from SDSS Data Release 9, comprising 54,468 quasar spectra with zqso > 2.15 suitable for Lyα forest analysis. This data set probes the intergalactic medium with absorption redshifts 2.0 < zα < 5.7 over an area of 3275 deg2, and encompasses an approximate comoving volume of 20 h−3 Gpc3. With each spectrum, we have included several products designed to aid in Lyα forest analysis: improved sky masks that flag pixels where data may be unreliable, corrections for known biases in the pipeline estimated noise, masks for the cores of damped Lyα systems and corrections for their wings, and estimates of the unabsorbed continua so that the observed flux can be converted to a fractional transmission. The continua are derived using a principal component fit to the quasar spectrum redward of rest-frame Lyα (λ > 1216 Å), extrapolated into the forest region and normalized by a linear function to fit the expected evolution of the Lyα forest mean flux. The estimated continuum errors are ≲ 5% rms. We also discuss possible systematics arising from uncertain spectrophotometry and artifacts in the flux calibration; global corrections for the latter are provided. Our sample provides a convenient starting point for users to analyze clustering in BOSS Lyα forest data, and it provides a fiducial data set that can be used to compare results from different analyses of baryon acoustic oscillations in the Lyα forest. The full data set is available from the SDSS-III DR9 Web site.
影响因子：
8.7
作者：
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者：
Wright, E. L.