ABCONV-Convert spectrum from Janskys into AB magnitudes

Description:

ABCONV generates a spectrum in AB magnitudes, given a spectrum in some other units. At present, only Janskys, milli-Janskys and micro-Janskys can be handled.

Parameters:

SPECTRUM

The name of a spectrum whose units are (currently) either Janskys, milli-Janskys, or micro-Janskys.

OUTPUT

The resulting spectrum, whose units will be AB magnitudes. OUTPUT can be the same as SPECTRUM, in which case the conversion will be performed in situ.

Source comments:

 A B C O N V  /  F L C O N V  /  I R C O N V

 Converts a spectrum into AB magnitudes (ABCONV) or f-lambda
 units (ergs/sec/cm**2/A) (FLCONV), or W/m**2/um (IRCONV).
 The original units of the
 data may be Janskys, milli-Janskys, or micro-Janskys.  Other
 possibilities may be added later.

 Command parameters -

 SPECTRUM The name of the structure containing the spectrum.
          currently used for the spectrum.  For FLCONV
          an x-axis data structure giving the wavelengths of the
          data elements is also required.

 OUTPUT   The name of the result of the operation.  This can
          be the same as for SPECTRUM. If not, a new structure
          is created, with everything but the data a direct
          copy of the input.

 Command keywords  - None

 User variables used - None
                                  KS / CIT 18th May 1984