lsst.pipe.tasks gdffeac4cd3+e4d909b13f
|
Functions | |
toIndex (nside, ra, dec) | |
toRaDec (nside, index) | |
eq2xyz (ra, dec) | |
eq2xyzVec (ra, dec) | |
convert_spherical (ra, dec) | |
convert_spherical_array (array) | |
query_disc (nside, ra, dec, max_rad, min_rad=0) | |
Utilities for interfacing with hpgeom. Originally implemented in http://github.com/LSSTDESC/dia_pipe and then translated to hpgeom.
lsst.pipe.tasks.associationUtils.convert_spherical | ( | ra, | |
dec | |||
) |
Convert from ra,dec to spherical coordinates. Used in query_disc. Parameters ---------- ra : `float` RA in radians. dec : `float` Declination in radians
Definition at line 124 of file associationUtils.py.
lsst.pipe.tasks.associationUtils.convert_spherical_array | ( | array | ) |
Convert from and a array ra,dec to spherical coordinates. Used in query_disc Parameters ---------- array : `numpy.ndarray`, (N, 2) (N, 2) Array of RA, DEC values. Returns ------- vecs : `numpy.ndarray`, (N, 3) Vectors on the unit sphere
Definition at line 141 of file associationUtils.py.
lsst.pipe.tasks.associationUtils.eq2xyz | ( | ra, | |
dec | |||
) |
Convert from equatorial ra,dec in degrees to x,y,z on unit sphere. Parameters ---------- ra : `float` RA in degrees. dec : `float` Declination in degrees Returns ------- xyz : `numpy.ndarray`, (3,) Float xyz positions on the unit sphere.
Definition at line 72 of file associationUtils.py.
lsst.pipe.tasks.associationUtils.eq2xyzVec | ( | ra, | |
dec | |||
) |
Convert equatorial ra,dec in degrees to x,y,z on the unit sphere parameters Vectorized version of ``eq2xyz`` Parameters ---------- ra : array_like, (N,) Array of RA in degrees. dec : array_like, (N,) Declination in degrees Returns ------- vec : `numpy.ndarray`, (N,3) Array of unitsphere 3-vectors.
Definition at line 96 of file associationUtils.py.
lsst.pipe.tasks.associationUtils.query_disc | ( | nside, | |
ra, | |||
dec, | |||
max_rad, | |||
min_rad = 0 |
|||
) |
Get the list of healpix indices within max_rad, min_rad given in radians around ra,dec given in degrees Parameters ---------- nside : `int` Resolution of the healpixels to search/return. ra : `float` RA in degrees. dec : `float` Declination in degrees max_rad : `float` Max distance in radians to search nearby healpixels. min_rad : `float`, optional Minimum distance in radians to search healpixels. Default = 0.
Definition at line 161 of file associationUtils.py.
lsst.pipe.tasks.associationUtils.toIndex | ( | nside, | |
ra, | |||
dec | |||
) |
Return healpix index given ra, dec in degrees Parameters ---------- nside : `int` Power of 2 nside healpix resolution. ra : `float` RA in degrees. dec : `float` Declination in degrees Returns ------- index : `int` Unique healpix pixel ID containing point RA, DEC at resolution nside.
Definition at line 33 of file associationUtils.py.
lsst.pipe.tasks.associationUtils.toRaDec | ( | nside, | |
index | |||
) |
Convert from healpix index to ra,dec in degrees Parameters ---------- nside : `int` Resolution of healpixel "grid". index : `int` Index of the healpix pixel we want to find the location of. Returns ------- pos : `numpy.ndarray`, (2,) RA and DEC of healpix pixel location in degrees.
Definition at line 53 of file associationUtils.py.