HOW TO REFER TO A SOURCE OR DESIGNATE A NEW ONE

	     from the IAU Commission 5 Task Group on Designations

 	(for astronomical sources of radiation outside the solar system)

            	       [current chair, H. R. Dickel]

	        	(version 1995 April 5)

IN GENERAL all source listings should always contain positional information 
and/or a second designation next to a principal designation in order to avoid 
ambiguities which can arise with a single designation.  

EXISTING DESIGNATIONS when used in listings, should never be altered and 
a bibliographical reference for the designation should be given.

WHEN  CREATING NEW DESIGNATIONS, such as for newly discovered source(s), 
the following procedure is recommended: 

   >> Consult and follow the "IAU Recommendations for Nomenclature" 

   >> Think up an acronym of at least three characters and 
      check the on-line "Interactive Dictionary of Acronyms" 
      to be sure your acronym is unique. 

   >> Consult representatives of the "Clearing House" 
      if problems arise and specific advise is desired.


REFERENCES:

   >> "IAU Recommendations for Nomenclature" is revised every three years;

   >> "Interactive Dictionary of Acronyms" is updated on a regular basis.

Both are available on-line on the free "info" account installed on the 
Internet node simbad.u-strasbg.fr (130.79.128.4) or NSI/DECnet node SIMBAD
(18099=17.691).  Login as "info"' no password is required.  For the
"IAU Recommendations for Nomenclature", just type IAU after the 
"info" prompt.

The "IAU Recommendations for Nomenclature" is also available on the
World-Wide-Web via your favorite web browser, 
e.g. Mosaic, Netscape, etc., at the URL address:  
http://cdsweb.u-strasbg.fr/iau-spec.html

World-Wide-Web access to the "Interactive Dictionary of Acronyms" is
under development; access will be announced in the home pages of the 
Center de Donnees de Strasbourg (CDS) at the URL address:
http://cdsweb.u-strasbg.fr/CDS.html 

Ascii, latex, and DVI versions of "How to refer to a source or 
designate a new one" and "IAU Recommendations for Nomenclature"
are accessible by anonymous ftp at Internet node cdsarc.u-strasbg.fr.

CLEARING HOUSE:

Advice on specific problems may be obtained from the "Clearing House", 
a subset of the Task Group on Designations of IAU Commission 5  
(current chair, H. Dickel, internet: lanie@astro.uiuc.edu).  
Representatives are listed at the end of the 
"IAU Recommendations for Nomenclature".