lib.catalog.utils.sky_to_cartesian

lib.catalog.utils.sky_to_cartesian(dist, ra, dec, degree=True, dtype=None)

Transform distance, RA, Dec into cartesian coordinates.

Parameters

• dist (array) – Distance.

• ra (array) – Right Ascension.

• dec (array) – Declination.

• degree (default=True) – Whether RA, Dec are in degree (True) or radian (False).

• dtype (numpy.dtype, default=None) – numpy.dtype for returned array.

Returns

position – position in cartesian coordinates; of shape (len(dist),3).

Return type

array