[daip] New Ticket - [!ZGM-828370]: change in SETJY

[Lynn D Matthews]

New Ticket: change in SETJY

I have noticed a possible mislabeling of the results reported by SETJY, depending on the APARM(2) setting. 

For example, with APARM(2)=0, it reports:

CHAR  > SETJY1: Using Perley-Butler time dep coefficients
CHAR  > SETJY1: FREQ( 1) =   8.395000 GHz
CHAR  > SETJY1: FREQ( 2) =   8.523000 GHz
CHAR  > SETJY1: '0137+331=3C48   ' IF =  1 flux = 3.2081 (Jy calcd)
CHAR  > SETJY1: '0137+331=3C48   ' IF =  2 flux = 3.1613 (Jy calcd)
CHAR  > SETJY1: SPECINDX= -0.7665      / spectral index
CHAR  > SETJY1: SPECURVE= -0.1981  0.0638  0.00 / spectral curvature
CHAR  > SETJY1: Previous coefficients Perley-Butler (2010)
CHAR  > SETJY1: FLUXES HAVE CHANGED since last version by <=   3.1 percent
CHAR  > SETJY1: '0137+331=3C48   ' IF =  1 flux = 3.3066 (Jy calcd)
CHAR  > SETJY1: '0137+331=3C48   ' IF =  2 flux = 3.2589 (Jy calcd)

However, if I set APARM(2)=1, it reports:

CHAR  > SETJY1: Using Perley-Butler (2013) coefficients
CHAR  > SETJY1: FREQ( 1) =   8.395000 GHz
CHAR  > SETJY1: FREQ( 2) =   8.523000 GHz
CHAR  > SETJY1: '0137+331=3C48   ' IF =  1 flux = 3.3066 (Jy calcd)
CHAR  > SETJY1: '0137+331=3C48   ' IF =  2 flux = 3.2589 (Jy calcd)
CHAR  > SETJY1: SPECINDX= -0.7253      / spectral index
CHAR  > SETJY1: SPECURVE= -0.2023  0.0540  0.00 / spectral curvature

In the latter case, what it labels the "Perley-Butler (2013) coefficients" are identical to what the previous run reported as the "Previous coefficients Perley-Butler (2010)". Are these supposed to be the same?

And in general, is APARM(2)=0 now the best choice for 3C48 data from 2010? 

Lastly, I note that the help file still states "The coefficient set to be used is
selected using APARM(2), with the default giving the 2010 values."

Thanks,
Lynn Matthews

Ticket Details
===================
Ticket ID: ZGM-828370
Department: AIPS Data Processing
Priority: Default
Status: Open
Link:  https://help.nrao.edu/staff/index.php?_m=tickets&_a=viewticket&ticketid=2678