mangadap.util.constants module¶

Defines a catch-all class for useful constants. These are meant to be values that are not available elsewhere, such as astropy.constants.

License:

Copyright (c) 2015, SDSS-IV/MaNGA Pipeline Group: Licensed under BSD 3-clause license - see LICENSE.rst

Source location:

$MANGADAP_DIR/python/mangadap/util/constants.py

Imports and python version compliance:

from __future__ import division
from __future__ import print_function
from __future__ import absolute_import
from __future__ import unicode_literals

import sys
if sys.version > '3':
    long = int

import numpy

Revision history:

28 May 2015: Original implementation by K. Westfall (KBW)

01 Jun 2017: (KBW) Changed attributes to class globals

class mangadap.util.constants.DAPConstants[source]¶

Bases: object

Defines the following set of constants:

sig2fwhm¶

Conversion factor from the standard deviation, $\sigma$, of a Gaussian to its full-width at half maximum (FWHM).

Type:	float

rad2arcs¶

Conversion factor from radians to to arcseconds

Type:	float

sidereal_year¶

Length of a sidereal year (1.0000385 Gregorian years) in seconds.

Type:	float

rad2arcs = 206264.80624709636

sidereal_year = 31558175.779

sig2fwhm = 2.3548200450309493