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:

DL,DB

D

galactic longitude and latitude [lII, bII] (radians)


RETURNED:

DSL,DSB

D

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 lII = 137.37.)