mirror of
https://github.com/Richard-Sti/csiborgtools.git
synced 2024-12-23 06:38:01 +00:00
53a0629d90
* add recarray manipulations * add cart to radec * add behav so x can be a list * add import * create empty files * ignore plots file * add planck data * add read_mmain file * add cols_to_structured import * use cols_to_structured * add cols_to_structued * add read_mmain import * add reading planck * add mass conversion * add brute force separation calculation * update nb * rename & int dtype * add func to get csiborg ids * add list to nd array conversion * add utils * rename file * add 2M++ * add read 2mpp * add 2mpp shortcut * add randoms generator * Change range of RA [0, 360] * fix ang wrapping * add code for sphere 2pcf * rm wrapping * optionally load only a few borgs * update nb
56 lines
1.8 KiB
Python
56 lines
1.8 KiB
Python
# Copyright (C) 2022 Richard Stiskalek
|
|
# This program is free software; you can redistribute it and/or modify it
|
|
# under the terms of the GNU General Public License as published by the
|
|
# Free Software Foundation; either version 3 of the License, or (at your
|
|
# option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful, but
|
|
# WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
|
|
# Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License along
|
|
# with this program; if not, write to the Free Software Foundation, Inc.,
|
|
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
|
|
import numpy
|
|
|
|
|
|
def cartesian_to_radec(arr, xpar="peak_x", ypar="peak_y", zpar="peak_z", degrees=True):
|
|
"""
|
|
Extract `x`, `y`, and `z` coordinates from a record array `arr` and
|
|
calculate their spherical coordinates representation.
|
|
|
|
Parameters
|
|
----------
|
|
arr : record array
|
|
Record array with the Cartesian coordinates.
|
|
xpar : str, optional
|
|
Name of the x coordinate in the record array.
|
|
ypar : str, optional
|
|
Name of the y coordinate in the record array.
|
|
zpar : str, optional
|
|
Name of the z coordinate in the record array.
|
|
degrees : bool, optional
|
|
Whether to return angles in degrees. By default `True`.
|
|
|
|
Returns
|
|
-------
|
|
dist : 1-dimensional array
|
|
Radial distance.
|
|
ra : 1-dimensional array
|
|
Right ascension.
|
|
dec : 1-dimensional array
|
|
Declination.
|
|
"""
|
|
x, y, z = arr[xpar], arr[ypar], arr[zpar]
|
|
|
|
dist = numpy.sqrt(x**2 + y**2 + z**2)
|
|
dec = numpy.arcsin(z / dist)
|
|
ra = numpy.arctan2(y, x)
|
|
|
|
if degrees:
|
|
dec = numpy.rad2deg(dec)
|
|
ra = numpy.rad2deg(ra)
|
|
|
|
return dist, ra, dec
|