UVES-POP恒星光谱库的重新标定
The recalibration of the UVES-POP stellar spectral library
摘要：
我们使用UVES管道的5.5.7版本和我们设计的算法重新减少了UVES-POP恒星光谱库中的所有光谱，该算法允许我们去除中阶梯光栅阶数拼接区域中的波纹。这些波纹是由平场相对于科学框架的偏移以及散射光的减影不足或过减引起的。我们还开发了一种方法来合并6 UVES光谱块划分的差距，在光谱覆盖范围内，通过使用合成恒星大气来预测段之间的通量差。最后，我们将库中430个光谱中的85%的通量校准质量提高到2%或更好。
英文摘要：
We have re-reduced all spectra from the UVES-POP stellar spectral library using the version 5.5.7 of the UVES pipeline and an algorithm we designed, which allows us to remove ripples in regions where echelle orders are stitched. These ripples are caused by the offset of a flat field with respect to a science frame and under- or oversubtraction of scattered light. We have also developed an approach to merge 6 UVES spectral chunks divided by gaps in the spectral coverage by using synthetic stellar atmospheres to predict the flux difference between the segments. At the end, we improved the flux calibration quality to 2% or better for 85% of 430 spectra in the library.
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