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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Absolute Photometric Calibration of the Infrared Camera (IRC) aboard AKARI
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Absolute Photometric Calibration of the Infrared Camera (IRC) aboard AKARI

机译：AKARI上的红外摄像机（IRC）的绝对光度校准

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摘要

The absolute photometric calibration of imaging observations with the Infrared Camera (IRC) aboard the AKARIsatellite was performed by monitoring the same stars regularly and by observing a set of standard stars. By our moni-toring observations, we confirmed that all channels of the IRC were stable to within 4% and that their sensitivitieswere constant until the liquid helium was exhausted. Using the data of these repeated observations, we evaluatedthe intrinsic errors as a function of the brightnesses of objects and found that the errors increase rapidly towardfainter objects. We also checked the consistency between short and long exposure times, and confirmed that the datasampling had been executed as designed. Finally, by comparing the estimated in-band flux densities and the observeddata values of standard stars, we obtained conversion factors to the absolute flux densities of all the band/exposureconfigurations. Their absolute uncertainties are estimated to be less than 6%.
机译：通过定期监视同一颗恒星并观察一组标准恒星，可以对AKARI卫星上的红外摄像机（IRC）进行成像观测进行绝对光度校准。通过我们的监测观察，我们确认了IRC的所有通道都稳定在4％以内，并且在液氦耗尽之前，它们的灵敏度一直保持不变。使用这些重复观测的数据，我们评估了固有误差与物体亮度的函数关系，发现误差朝着较弱的物体迅速增加。我们还检查了长时间曝光时间之间的一致性，并确认数据采样已按设计执行。最后，通过比较估计的带内通量密度和标准星的观测数据值，我们获得了所有带/曝光配置的绝对通量密度的转换因子。他们的绝对不确定性估计小于6％。

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