SLA_GALSUP - Galactic to Supergalactic   

ACTION:

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

CALL:

CALL sla_GALSUP (DL, DB, DSL, DSB)

GIVEN:

$$[\,l^{I\!I},b^{I\!I}\,]$$ DL,DB

RETURNED:

DSL,DSB supergalactic longitude and latitude (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 $l^{I\!I}=137.37$.)