StellarXu / hiviewer

This code is used to: Check and show the fits image, Overlap different images (or contours), Process the data cube preliminarily.

hiviewer （old name: Fits_Inspect_Overlap)

This code is used to: Inspect and show the fits image, Overlap different images (or contours), Process the data cube preliminarily.

Please read README and Fits_example.ipynb in doc directory.

Notes

• 此射电图像包的一个简要介绍在这里.

• 欢迎关注astroR2的zhihu.

Logs

• Newest version: v1.3 on 2023/01/01

• Updated on 2023/01/01

  • 增加pv图。修改了一些bug

• Updated on 2022/09/03

  • 更改包的名字为hiviewer,这个过程可能产生bug

• Updated on 2021/01/26

  • 修改了一点默认参数，谱线可以按pixel抽取

  • 修改了把nan补0的bug

  • moment 2 支持三种type

      'variance': M2
    
      'sigma'：sigma = np.sqrt(M2)
      
      'fwhm':fwhm = np.sqrt(8ln2)*sigma
    

  • tag v1.2

• Updated on 2021/01/10

  • 增加了三种reproject方法
    • Montage
    • Kapteyn
    • reproject
  • 增加了椭圆拟合一个星系，画沿长轴的cube截面
  • 更改了moudule结构，更合理

• ** IMPORTANT WARNING ** on 2020/12/11

  如果使用了reproject，重新投影，改变pixel的大小、分辨率，单位一定要慎重！

  确保单位是surface brightness，a unit of flux per area，比如Jy/beam,Jy/sr,W/m^2/sr等，而不是flux，比如mJy,Jy/pixel,W/m^2等。如果是flux，you will need to scale by a factor of (the new pixel area)/(the old pixel area)。

  具体说明：http://research.endlessfernweh.com/convolution-and-regridding/

• Kapteyn Package for Python 3 是一个功能更加齐全的包，download the file kapteyn-3.0.tar.gz。

  v1.1之后的版本我会把Kapteyn、reproject中的convolve_reproject功能替换出来，以免Montage的方法不好安装。他们同样不适用于flux。 on 2020/12/1