CircleAnnulusSkyRegion

class regions.CircleAnnulusSkyRegion(center, inner_radius, outer_radius, meta=None, visual=None)

Bases: SkyRegion

A circular annulus in sky coordinates.

Parameters:

centerSkyCoord

The position of the center of the annulus.

inner_radiusQuantity

The inner radius of the annulus in angular units.

outer_radiusQuantity

The outer radius of the annulus in angular units.

metaRegionMeta or dict, optional

A dictionary that stores the meta attributes of the region.

visualRegionVisual or dict, optional

A dictionary that stores the visual meta attributes of the region.

Attributes Summary

center	The center position as a astropy.coordinates.SkyCoord.
inner_radius	The inner radius as a astropy.units.Quantity angle.
meta	The meta attributes as a RegionMeta
outer_radius	The outer radius as a astropy.units.Quantity angle.
visual	The visual attributes as a RegionVisual.

Methods Summary

to_pixel(wcs)

Return the equivalent region defined in pixel coordinates.

Attributes Documentation

center

The center position as a astropy.coordinates.SkyCoord.

inner_radius

The inner radius as a astropy.units.Quantity angle.

meta

The meta attributes as a RegionMeta

outer_radius

The outer radius as a astropy.units.Quantity angle.

visual

The visual attributes as a RegionVisual.

Methods Documentation

to_pixel(wcs)

Return the equivalent region defined in pixel coordinates.

Parameters:

wcsWCS

The world coordinate system transformation to use to convert between sky and pixel coordinates.

Returns:

pixel_regionPixelRegion

A pixel region.