[daip] [!6488]: aips - Flagging issues

Eric Greisen do-not-reply at nrao.edu
Mon Apr 20 18:47:09 EDT 2015


Eric Greisen updated #6488
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                 Due: - Cleared - (was: 22 April 2015 09:44 PM)

Flagging issues
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           Ticket ID: 6488
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/6488
           Full Name: Robert H Gray
               Email: roberthansengray at gmail.com
             Creator: User
          Department: AIPS Data Processing
       Staff (Owner): -- Unassigned --
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template Group: Default
             Created: 20 April 2015 09:42 PM
             Updated: 20 April 2015 10:47 PM
      Resolution Due: 28 April 2015 09:42 PM (7d 22h 55m)



Your plot shows a lot of data at a correct flux, a significant
number of samples at correct flux * sqrt(2) and then some at
correct * 2.  You are plotting channel 1 which is  corrupted by
the FFT process.  I do not know what you have done to these
data, have you applied the calibration, the bandpass, etc?

Have you tried looking at just RR and just LL to see if the oddity
is in just one polarization?  Have you looked at other spectral channels?
Did you use this source as a calibrator and the result looks like this
(it should not...)?  Have you looked at the SN table after CALIB, the
CL table, etc??

Eric Greisen






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