[daip] [!5396]: aips - BPASS with VLA linear feeds at P band

[Tracy Clarke]

Tracy Clarke updated #5396
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BPASS with VLA linear feeds at P band
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           Ticket ID: 5396
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/5396
           Full Name: Tracy Clarke
               Email: tracy.clarke at nrl.navy.mil
             Creator: User
          Department: AIPS Data Processing
       Staff (Owner): -- Unassigned --
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template Group: Default
             Created: 25 August 2014 05:42 PM
             Updated: 25 August 2014 05:42 PM
                 Due: 27 August 2014 05:42 PM (2d 0h 0m)
      Resolution Due: 02 September 2014 05:42 PM (8d 0h 0m)



The new P band system feeds are labeled as X and Y in recent VLA data. When trying to run
a BPASS AIPS will complain about that:

BPASS1: Task BPASS  (release of 31DEC13) begins
BPASS1: Your data are linearly polarized, but DOPOL=.FALSE.
BPASS1: The results of BPASS will be incorrect
BPASS1: Purports to die of UNNATURAL causes

I can change CRVAL2 to be -1 and BPASS will calculate the bandpass once it has been
lied to. This will be something low frequency users will run into often but the VLA ones
will not be used to this.

Tracy

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