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# Ｘ線天文学の歴史と概要
<!-- Put the link to this slide here so people can follow -->
slide: https://hackmd.io/@tenoto/S1Xgs1HNw
author: 榎戸輝揚 (理化学研究所) twitter: [teru_enoto](https://twitter.com/teru_enoto) :satellite::star:
course: [高エネルギー宇宙物理学概論のメインページ](https://hackmd.io/@tenoto/HkNgkbHGv)
---
## 有効面積 (Effective Area)
- Ｘ線光子を集めることのできる能力を示す
- 幾何学的面積と検出効率の積
---
## 空間分解能 (Angular resolution)
- 電波天文学では回折限界に到達しており、ミラーを大きくすることが有利になる。
- Ｘ線天文学では回折限界に到達しておらず、鏡の表面精度や集光性能で空間分解能が決まる。
---
## バックグラウンド
---
## 宇宙Ｘ線背景放射 (Cosmic X-ray Background, CXB)
- $6\times 10^{-15}$ ergs/s/cm2/arcmin2 (2-10 keV)
---
## 分割
<div id="left">
<br>
<iframe src="https://papers.nips.cc/paper/5346-sequence-to-sequence-learning-with-neural-networks.pdf" width="100%" frameBorder="0"></iframe>
</div>
<div id="right">
<br>
- a
- hogehoge
- aaa
- ...
</div>
---
## test
- test
---
## Ｘ線天文衛星の歴史
```mermaid
gantt
dateFormat YYYY-MM-DD
axisFormat %Y
title History of X-ray satellites
section US/NASA
Uhuru: done, 1970-12-12, 1973-03-31
Einstein: done, 1978-11-13, 1981-04-17
RXTE: done, 1995-12-30, 2012-01-05
Chandra: active, 1999-07-23, 2020-12-31
Swift: active, 2004-12-20, 2020-12-31
NuSTAR: active, 2012-06-13, 2020-12-31
NICER: active, 2017-06-03, 2020-12-31
section Japan/JAXA
Hakucho: done, 1979-02-21, 1985-04-15
Tenma: done, 1983-02-20, 1988-12-17
Ginga: done, 1987-02-05, 1991-11-01
ASCA: done, 1993-02-20, 2001-03-02
Suzaku: done, 2005-07-10, 2015-06-01
MAXI: active, 2009-08-13, 2020-12-31
Hitomi: done, 2016-02-17, 2016-04-28
section Europe/ESA
Arial 5: done, 1974-10-15, 1980-03-14
EXOSAT: done, 1983-05-26, 1986-05-05
ROSAT: done, 1990-04-01, 1999-02-12
BeppoSAX: done, 1996-04-30, 2002-04-30
XMM-Newton: active, 1999-12-10, 2020-12-31
INTEGRAL: active, 2002-10-17, 2020-12-31
eROSITA: active, 2019-07-13, 2020-12-31
section Russia
ART-XC: active, 2019-07-13, 2020-12-31
Kvant-1: done, 1987-03-31, 2001-03-23
Granat: done, 1989-12-01, 1999-05-25
section India/ISRO
Astrosat: active, 2015-09-28, 2020-12-31
section China/CAS
HMXT: active, 2017-06-15, 2020-12-31
```
<br>
- 主要機関のＸ線衛星や装置の運用期間（打ち上げ日と運用終了日）。灰色の箱は運用を終了したミッションで、青色の箱は運用中のミッションである。
---
## Chandra Ｘ線望遠鏡
<div id="left">
(from [3. Chandra Beauty Shot](https://chandra.harvard.edu/resources/illustrations/craftIllustrations.html#craft3))
</div>
<div id="right">
- 高い空間分解能を誇る宇宙Ｘ線望遠鏡
- hogehoge
- aaa
- ...
</div>
---
---
## 分割
- このようにスライドを分割することは可能ですが，分割方法を事前にcssで定義する必要があります．
<div id="left">
<br>
### left
<iframe src="https://papers.nips.cc/paper/5346-sequence-to-sequence-learning-with-neural-networks.pdf" height="600px" width="100%" frameBorder="0"></iframe>
</div>
<div id="right">
<br>
### right
- a
- hogehoge
- aaa
- ...
</div>
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