GETTING LUCKY WITH ADAPTIVE OPTICS: FAST ADAPTIVE OPTICS IMAGE SELECTION IN THE VISIBLE WITH A LARGE TELESCOPE

GETTING LUCKY WITH ADAPTIVE OPTICS: FAST ADAPTIVE OPTICS IMAGE SELECTION IN THE VISIBLE WITH A LARGE TELESCOPE
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幸运的是自适应光学:使用大型望远镜在可见光中快速自适应光学图像选择

DOI:
10.1088/0004-637x/692/1/924
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发表时间:
2009
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
Law N
Law N
中科院分区:
--
文献类型:
--
作者:
Law N

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我们描述了一种新的仪器的结果,它结合了幸运成像和自适应光学(AO),在5米望远镜上进行了第一次常规的直接衍射限制成像。通过Palomar AO系统后面的快速图像选择和对准,我们在典型的视觉条件范围内获得了700 nm处5%-20%的Strehl比率,当选择10%的输入帧时,Strehl比率的中位数约为12%。在波长约700 nm处,该系统获得了衍射限为35 mS的半高宽(FWHM)。在950 nm处,输出斯特雷尔比高达36%,而在500 nm处,半高宽分辨率仅为42 mA,具有较低的斯特雷尔比,但分辨率比主流视场提高了∼20倍。为了获得更宽的视场,我们还使用了多颗幸运成像导航星,其配置类似于地面的声光系统。用8颗导星,但采样不足的数据,我们在I波段的30“×30”视场内获得了300 mA的分辨率。
We describe the results from a new instrument which combines Lucky Imaging and adaptive optics (AO) to give the first routine direct diffraction-limited imaging in the visible on a 5 m telescope. With fast image selection and alignment behind the Palomar AO system we obtained Strehl ratios of 5%–20% at 700 nm in a typical range of seeing conditions, with a median Strehl of approximately 12% when 10% of the input frames are selected. At wavelengths around 700 nm the system gave diffraction-limited 35 mas full width at half-maxima (FWHMs). At 950 nm the output Strehl ratio was as high as 36% and at 500 nm the FWHM resolution was as small as 42 mas, with a low Strehl ratio but with resolution improved by a factor of∼ 20 compared to the prevailing seeing. To obtain wider fields we also used multiple Lucky Imaging guide stars in a configuration similar to a ground layer AO system. With eight guide stars but very undersampled data we obtained 300 mas resolution across a 30''× 30''field of view in the i'band.
DOI: 10.1051/0004-6361:20020477
发表时间: 2002-05-01
影响因子: 6.5
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影响因子: 3.7
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