First Hard X-Ray Imaging Results by Solar Orbiter STIX.
First Hard X-Ray Imaging Results by Solar Orbiter STIX.
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DOI：
10.1007/s11207-022-02029-x
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发表时间：
2022
期刊：
影响因子：
2.8
通讯作者：
Krucker, Sam
中科院分区：
文献类型：
--
作者：
Massa, Paolo;Battaglia, Andrea F.;Volpara, Anna;Collier, Hannah;Hurford, Gordon J.;Kuhar, Matej;Perracchione, Emma;Garbarino, Sara;Massone, Anna Maria;Benvenuto, Federico;Schuller, Frederic;Warmuth, Alexander;Dickson, Ewan C. M.;Xiao, Hualin;Maloney, Shane A.;Ryan, Daniel F.;Piana, Michele;Krucker, Sam
用于成像x射线的光谱仪/望远镜（STIX）是太阳轨道飞行器上的六个遥感仪器之一。该望远镜采用间接成像技术，测量30个可见度，即太阳耀斑x射线源的角度傅里叶分量。因此，STIX的成像问题包括仪器测量数据的傅里叶反演。在这项工作中，我们表明30个STIX次准直器中有24个的可见性振幅和相位校准达到了科学数据开发的满意水平，并且一套成像方法能够提供来自太阳轨道器的太阳耀斑的第一张硬x射线图像。采用四种基于可见性的图像重建方法和一种基于计数的方法，对2021年5月发生在C4和M4之间的6个GOES级别事件的校准STIX观测结果进行了应用。所得到的重建结果与用于拟合STIX可见度振幅的优化算法所提供的重建结果进行了比较。我们发现，这五种成像方法产生的结果在形态上与太阳动力天文台（SDO/AIA）上的大气成像组件提供的紫外波长结果一致。重建源的值和参数在两种方法之间具有可比性，从而证实了它们的鲁棒性。
The Spectrometer/Telescope for Imaging X-rays (STIX) is one of six remote sensing instruments on-board Solar Orbiter. The telescope applies an indirect imaging technique that uses the measurement of 30 visibilities, i.e., angular Fourier components of the solar flare X-ray source. Hence, the imaging problem for STIX consists of the Fourier inversion of the data measured by the instrument. In this work, we show that the visibility amplitude and phase calibration of 24 out of 30 STIX sub-collimators has reached a satisfactory level for scientific data exploitation and that a set of imaging methods is able to provide the first hard X-ray images of solar flares from Solar Orbiter. Four visibility-based image reconstruction methods and one count-based are applied to calibrated STIX observations of six events with GOES class between C4 and M4 that occurred in May 2021. The resulting reconstructions are compared to those provided by an optimization algorithm used for fitting the amplitudes of STIX visibilities. We show that the five imaging methods produce results morphologically consistent with the ones provided by the Atmospheric Imaging Assembly on board the Solar Dynamic Observatory (SDO/AIA) in UV wavelengths. The values and the parameters of the reconstructed sources are comparable between methods, thus confirming their robustness.
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影响因子：
4.9
作者：
Dennis, Brian R.;Pernak, Rick L.
通讯作者：
Pernak, Rick L.
影响因子：
6.5
作者：
Massa, Paolo;Perracchione, Emma;Krucker, Sam
通讯作者：
Krucker, Sam
影响因子：
4.9
作者：
Massa, Paolo;Schwartz, Richard;Benvenuto, Federico
通讯作者：
Benvenuto, Federico
DOI：
10.1016/j.nima.2014.11.021
发表时间：
2015-07-01
影响因子：
1.4
作者：
Meuris, A.;Limousin, O.;Commichau, V.
通讯作者：
Commichau, V.
影响因子：
4.9
作者：
Sciacchitano, Federica;Sorrentino, Alberto;Piana, Michele
通讯作者：
Piana, Michele