Simultaneous XMM-Chandra Observations of 3C273
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Crosscalibration with Chandra is important and best done on simultaneousobservations of objects with smooth continua as the whole of the detectorsare illuminated. The proposed work is part of the Chandra effort to understandthe significant buildup of ACIS contamination. Simultaneous observationswill help both us and them. They are planning two 30ks observations numbered4430 (ACISS+HETG) and 4431 (ACISS+LETG) in the Chandra longterm scheduleand have undertaken to make an effort to do them when visible by XMM, whichis not the case in the current rough plan. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]
与 Chandra 的交叉校准至关重要，且最佳实践是在整个探测器均被照亮的平滑连续物体的同时观测中完成。所提议的研究工作是 Chandra 项目理解 ACIS 污染显著累积的一部分。同时观测将有助于我们及他们。他们计划在 Chandra 长期计划中进行两次编号为 4430（ACISS+HETG）和 4431（ACISS+LETG）的 30ks 观测，并承诺在 XMM 可见时尽力完成，而当前粗略计划中并非如此。[截断！请参阅实际数据以获取全文 [截断！请参阅实际数据以获取全文]]
提供机构：
European Space Agency
