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arXiv 1302.3620astro-ph.IM
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光纤摄谱仪天空连续谱的精确相减

Accurate Sky Continuum Subtraction with Fibre-fed Spectrographs

Yanbin Yang, Myriam Rodrigues, Mathieu Puech, Hector Flores, Frederic Royer, Karen Disseau, Thiago Gonçalves, François Hammer, Michele Cirasuolo, Chris Evans, G… 展开作者

Yanbin Yang, Myriam Rodrigues, Mathieu Puech, Hector Flores, Frederic Royer, Karen Disseau, Thiago Gonçalves, François Hammer, Michele Cirasuolo, Chris Evans, Gianluca Li Causi, Roberto Maiolino, Claudio Melo

摘要:

光纤摄谱仪现在的吞吐量相当于狭缝摄谱仪。然而,可以达到的天空相减精度通常被认为是与光纤使用相关的主要问题之一。利用FLAMES-GIRAFFE的技术时间观测,测试了两种观测技术,即双凝视和交叉波束切换,并对两种情况下所达到的天空相减精度进行了量化。结果表明,采用交叉波束切换方式,天空相减精度可达0.6%。这是非常令人鼓舞的关于检测非常微弱的来源与未来的光纤光谱仪,如VLT/MOONS或E-ELT/MOSAIC。

英文摘要:

Fibre-fed spectrographs now have throughputs equivalent to slit spectrographs. However, the sky subtraction accuracy that can be reached has often been pinpointed as one of the major issues associated with the use of fibres. Using technical time observations with FLAMES-GIRAFFE, two observing techniques, namely dual staring and cross beam-switching, were tested and the resulting sky subtraction accuracy reached in both cases was quantified. Results indicate that an accuracy of 0.6% on sky subtraction can be reached, provided that the cross beam-switching mode is used. This is very encouraging with regard to the detection of very faint sources with future fibre-fed spectrographs, such as VLT/MOONS or E-ELT/MOSAIC.

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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