Aims: The precise determination of the stellar effective temperature of solar type stars is of extreme importance for Astrophysics. We present an effective temperature calibration for FGK dwarf stars using line equivalent width ratios of spectral absorption lines. Method: The ratios of spectral line equivalent width can be very sensitive to effective temperature variations for a well chosen combination of lines. We use the automatic code ARES to measure the equivalent width of several spectral lines, and use these to calibrate with the precise effective temperature derived from spectroscopy presented in a previous work. Results: We present the effective temperature calibration for 433 line equivalent width ratios built from 171 spectral lines of different chemical elements. We also make available a free code that uses this calibration and that can be used as an extension to ARES for the fast and automatic estimation of spectroscopic effective temperature of solar type stars.
Photometric Redshift Calibration with Self Organising Maps
精确的测光红移校准是从宇宙剪切调查的所有宇宙学约束的鲁棒性的核心。对KiDS的分析重新加权了来自所有重叠光谱调查的训练样本，以提供直接的红移校准。使用自组织映射（SOM），我们证明了这种光谱编译是足够完整的KiDS，代表$99\%$的有效的二维宇宙剪切样本。我们使用SOM来定义一个$100\%$代表“金”宇宙剪切样本，每个层析箱。使用模拟模拟KiDS和光谱训练集，我们估计的不确定性的SOM红移校准，并发现光度噪声，样本方差，光谱选择效应（包括红移和幅度不完整性）诱导合并的最大散射的红移分布重建（$Δ\langle z \rangle=\langle z \rangle_{\rm est}-\langle z \rangle_{\rm true}$）的偏差$σ_{Δ\langle z \rangle} \leq 0.006$在所有的层析箱。我们表明，SOM校准是无偏的情况下，无噪声测光和完全代表性的光谱数据集，从理论上预期。在我们的模拟数据中包括光度噪声和光谱选择效应引入了最大偏差$Δ\langle z \rangle =0.013\pm0.006$，或$97.5\%$置信度下的$Δ\langle z \rangle \leq 0.025$，一旦质量标志已应用于SOM。这里提出的方法是一个显着的改进，以前采用的直接红移校准实施KiDS，由于其诊断和质量保证能力。在未来的宇宙剪切研究中…
Systematic Uncertainties in the Spectroscopic Measurements of Neutron-Star Masses and Radii from Thermonuclear X-ray Bursts. III. Absolute Flux Calibration
A General Framework for Radial Velocity Calibration in Low-Resolution Spectroscopic Surveys: Correcting Wavelength-Dependent and Global Systematics with Application to LAMOST DR9
Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University（北京师范大学天文与前沿科学研究院）；School of Physics and Astronomy, Beijing Normal University（北京师范大学物理与天文学院）；Yunnan University（云南大学）
The Panchromatic High-Resolution Spectroscopic Survey of Local Group Star Clusters - I. General Data Reduction Procedures for the VLT/X-shooter UVB and VIS arm
In-situ wavelength calibration without a calibration target: use of Fraunhofer lines after landing on planetary surface
准确的波长校准对于定性和定量光谱测量至关重要。许多用于行星探测的光谱仪都配备了机载校准源。然而，这种校准源并不总是可用的，因为行星着陆器任务通常在尺寸和质量上有很大的限制。在这项研究中，我们提出并验证了一种波长校准方法，利用太阳夫琅和费线在反射光谱中观察到的。结果表明，在0-4000 cm ~（-1）范围内，该方法的测量精度优于0.6cm ~（-1），对橄榄石中镁元素丰度的测量精度优于2%。
Featureless stars: Flux Calibration for Extremely Large Telescopes
Durham University（杜伦大学）；Florida State University（佛罗里达州立大学）；Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室）；Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo（东京大学宇宙物理与数学研究所（ Kavli 研究所））；University of California at Santa Cruz（加州大学圣克鲁兹分校）；University of California Observatories, Lick Observatory（加州大学天文台，利克天文台）；National Astronomical Observatory of Japan（日本国立天文台）
Extracting redshifts from 2D slitless spectroscopic images using deep learning for the CSST galaxy survey
National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；Science Center for China Space Station Telescope, National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台中国空间站望远镜科学中心）；University of Chinese Academy of Sciences（中国科学院大学）
The SPHEREx Instrument: Calibration, testing and performance measurements of the NIR spectroscopic surveyor from the laboratory to in-orbit commissioning
California Institute of Technology（加州理工学院）；Jet Propulsion Laboratory, California Institute of Technology（加州理工学院喷气推进实验室）；Rochester Institute of Technology（罗切斯特理工学院）
