hipscatalog_gen.healpix.densmap.ipix_for_depth

ipix_for_depth(ra_deg, dec_deg, depth)

Return HEALPix NESTED pixel indices for a given depth (order).

Ensures the return type is always a 1D numpy.ndarray[int64], even if Healpy would otherwise return a scalar for scalar inputs.

Parameters:

• ra_deg (ndarray) – Right ascension in degrees.

• dec_deg (ndarray) – Declination in degrees.

• depth (int) – HEALPix order (depth).

Returns:

Numpy array (1D) with NESTED pixel indices (dtype=int64).

Return type:

ndarray[tuple[Any, …], dtype[int64]]