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.help galsup Jun99 "Slalib Package"
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SUBROUTINE slGASU (DL, DB, DSL, DSB)
- - - - - - -
G A S U
- - - - - - -
Transformation from IAU 1958 galactic coordinates to
de Vaucouleurs supergalactic coordinates (double precision)
Given:
DL,DB dp galactic longitude and latitude L2,B2
Returned:
DSL,DSB dp supergalactic longitude and latitude
(all arguments are radians)
Called:
slDS2C, slDMXV, slDC2S, slDA2P, slDA1P
References:
de Vaucouleurs, de Vaucouleurs, & Corwin, Second Reference
Catalogue of Bright Galaxies, U. Texas, page 8.
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 L2=137.37.)
P.T.Wallace Starlink 25 January 1999
Copyright (C) 1999 Rutherford Appleton Laboratory
Copyright (C) 1995 Association of Universities for Research in Astronomy Inc.
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