liger_iris_sim.utils.topology

Functions

iris_ifu_coord_to_spatial(yd, xd, scale, size)

Convert IFU spaxel coordinates to spatial coordinates.

iris_imager_detector_coord_to_spatial(xd, ...)

Convert imager detector coordinates to spatial coordinates.

iris_imager_spatial_coord_to_imager(xs, ys, ...)

Convert IRIS spatial coordinates to imager coordinates.

sky_coord_to_detector(ra, dec, scale, size)

Convert sky coordinates (RA, Dec) to detector coordinates.
liger_iris_sim.utils.topology.iris_ifu_coord_to_spatial(yd: float, xd: float, scale: float, size: tuple[int, int]) → tuple[float, float][source]

Convert IFU spaxel coordinates to spatial coordinates.

Parameters:

  • yd (float) – Y coordinate in spaxels.

  • xd (float) – X coordinate in spaxels.

  • scale (float) – Plate scale in mas.

  • size (tuple[int, int]) – Size of the detector in pixels.

liger_iris_sim.utils.topology.iris_imager_detector_coord_to_spatial(xd: float, yd: float, scale: float) → tuple[float, float][source]

Convert imager detector coordinates to spatial coordinates.

Parameters:

  • xd (float) – X coordinate in pixels.

  • yd (float) – Y coordinate in pixels.

  • scale (float) – Plate scale in arcsec.

Returns:

Spatial coordinates (xs, ys).

Return type:

(float, float)

liger_iris_sim.utils.topology.iris_imager_spatial_coord_to_imager(xs: float, ys: float, scale: float) → tuple[float, float][source]

Convert IRIS spatial coordinates to imager coordinates.

Parameters:

  • xs (float) – X coordinate in arcsec relative to on-axis.

  • ys (float) – Y coordinate in arcsec relative to on-axis.

  • scale (float) – Plate scale in arcsec.

Returns:

Detector coordinates (x_pixel, y_pixel).

Return type:

(float, float)

liger_iris_sim.utils.topology.sky_coord_to_detector(ra: float, dec: float, scale: float, size: tuple[int, int], ra0: float = 0, dec0: float = 0) → tuple[float, float][source]

Convert sky coordinates (RA, Dec) to detector coordinates.

Parameters:

  • ra (float) – Right ascension or offset from center in deg.

  • dec (float) – Declication or offset from center in deg.

  • scale (float) – Plate scale in arcsec.

  • size (tuple[int, int]) – Size of the detector in pixels.

  • ra0 (float) – Reference RA in degrees. Defaults to 0 (RA is already offset).

  • dec0 (float) – Reference Dec in degrees. Defaults to 0 (Dec is already offset).

Returns:

Detector coordinates (x_pixel, y_pixel).

Return type:

(float, float)