How to use Image object ?

Warning

Drafting documentation

Image structure

Illustration of an image

Getting started

Attributes of the ‘Image’ object

Attribut

What is it?

Image.file_name

The name of the file in .FITS format.

Image.primary_header

The primary header of .FITS data.

Image.data_header

The header associated with data science.

Image.data

The image, values stored in a 2D array.

Image.errs

Errors associated with science data, stored in a 2D array.

Image.size

Image dimensions (nx, ny).

Image.px_area

Area of spatial pixels, in arcsec^2.

Image.units

The unit of image values, by default these values are surface brightnesses given in MJy/sr.

Methods of the ‘Image’ object

Method

What does it do?

Image.info()

Prints data-related information stored in headers.

Image.plot()

Displays the image in a matplotlib figure.

Image.get_px_coords()

Converts R.A. Dec. coordinates in degrees to pixel coordinates.

Image.get_world_coords()

Converts pixel coordinates to R.A. Dec. coordinates in degrees.

Image.crop()

Extract part of the image (i.e. a zoom).

Image.rotate()

Apply a rotation using WCS.

Image.convolve()

Convolves the image from a PSF FWHM.

Image.extract_intensity_profile()

Extracts an intensity profile from the image.