galacticops – Container for functions relating to the Galaxy

class GalacticOps

calc_dtrue((x, y, z))

Calculate the distance from the Sun to Galactic coords (x, y, z) (NB. tuple)

calcXY(r0)

Given a Galactic radius r0, choose an (x, y) position at random

ne2001_dist_to_dm(dist, gl, gb)

Given a distance and Galactic coordinates, calculate DM according to NE2001

lm98_dist_to_dm(dist, gl, gb)

Given a distance and Galactic coordinates, calculate DM according to lm98

lb_to_radec(gl, gb)

Convert Galactic coordinates to equatorial

ra_dec_to_lb(ra, dec)

Convert equatorial coordinates to Galactic

tsky(gl, gb, freq)

Calculate sky temperature at observing frequency freq and at Galactic coordinates gl, gb according to Haslam et al

xyz_to_lb((x, y, z))

Convert the tuple (x, y, z) to Galactic sky coordinates.

Returns l, b in degrees

lb_to_xyz(l, b, dist)

Convert Galactic sky coordinates at a distance dist to x,y,z coordinates.

Returns position as a tuple

scatter_bhat(dm, scatterindex, freq_mhz)

Calculate the scatter time according to Bhat et al at. Frequency in MHz, pulsar with dispersion measure dm, and using a scattering spectral index of scatterindex.

Calculated as

and typically (but there is an option to vary it!)