SLA_SUPGAL - Supergalactic to Galactic

ACTION:

Transformation from de Vaucouleurs supergalactic coordinates to IAU 1958 galactic coordinates.

CALL:

CALL sla_SUPGAL (DSL, DSB, DL, DB)

GIVEN:

DSL,DSB

D

supergalactic longitude and latitude (radians)

RETURNED:

DL,DB

D

galactic longitude and latitude $[ l^{I\!I},b^{I\!I} ]$ (radians)

REFERENCES:

1. de Vaucouleurs, de Vaucouleurs, & Corwin, Second Reference Catalogue of Bright Galaxies, U.Texas, p8.
2. Systems & Applied Sciences Corp., documentation for the machine-readable version of the above catalogue, Contract NAS 5-26490.

(These two references give different values for the galactic longitude of the supergalactic origin. Both are wrong; the correct value is $l^{I\!I}=137.37$.)