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HEIDI: An Automated Process for the Identification and Extraction of Photometric Light Curves from Astronomical Images

机译:HEIDI:一种自动识别和提取方法   来自天文图像的光度光曲线

摘要

The production of photometric light curves from astronomical images is a verytime-consuming task. Larger data sets improve the resolution of the lightcurve, however, the time requirement scales with data volume. The data analysisis often made more difficult by factors such as a lack of suitable calibrationsources and the need to correct for variations in observing conditions from oneimage to another. Often these variations are unpredictable and corrections arebased on experience and intuition. The High Efficiency Image Detection & Identification (HEIDI) pipelinesoftware rapidly processes sets of astronomical images. HEIDI automaticallyselects multiple sources for calibrating the images using an algorithm thatprovides a reliable means of correcting for variations between images in a timeseries. The algorithm takes into account that some sources may intrinsicallyvary on short time scales and excludes these from being used as calibrationsources. HEIDI processes a set of images from an entire night of observation,analyses the variations in brightness of the target objects and produces alight curve all in a matter of minutes. HEIDI has been tested on three different time series of asteroid 939 Isbergaand has produced consistent high quality photometric light curves in a fractionof the usual processing time. The software can also be used for other transientsources, e.g. gamma-ray burst optical afterglows. HEIDI is implemented in Python and processes time series astronomical imageswith minimal user interaction. HEIDI processes up to 1000 images per run in thestandard configuration. This limit can be easily increased. HEIDI is nottelescope-dependent and will process images even in the case that no telescopespecifications are provided. HEIDI has been tested on various Linux . HEIDI isvery portable and extremely versatile with minimal hardware requirements.
机译:从天文图像生成光度学光曲线是一项非常耗时的任务。较大的数据集可提高光曲线的分辨率,但是时间要求随数据量的增长而变化。数据分析通常由于诸如缺乏合适的校准源以及需要校正从一个图像到另一个图像的观察条件的变化等因素而变得更加困难。通常,这些变化是不可预测的,更正是基于经验和直觉的。高效图像检测和识别(HEIDI)管道软件可快速处理天文图像集。 HEIDI使用一种算法来自动选择多个源来校准图像,该算法提供了一种校正时间序列中图像之间变化的可靠方法。该算法考虑到某些信号源可能会在短时间范围内发生固有变化,并将这些信号源用作校准源。 HEIDI会在一整夜的观察过程中处理一组图像,分析目标物体的亮度变化,并在几分钟内产生一条光曲线。 HEIDI已在939 Isberga小行星的三个不同时间序列上进行了测试,并在通常的处理时间的一小部分内产生了一致的高质量光度学光曲线。该软件还可以用于其他瞬态源,例如伽马射线爆射的光学余辉。 HEIDI用Python实现,并以最少的用户交互处理时间序列天文图像。在标准配置下,HEIDI每次运行最多可处理1000张图像。此限制可以轻松增加。 HEIDI不依赖于望远镜,即使没有提供望远镜规格,HEIDI也会处理图像。 HEIDI已在各种Linux上进行了测试。 HEIDI非常轻便,功能强大,具有最低的硬件要求。

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