BF072C reduction notes:

BF072C on 28 June 2004 = day 180

Array name = 'VLBA    '   includes antennas:
           1:BR         2:FD         3:HN
           4:KP         5:LA         6:MK
           7:NL         8:OV         9:PT
          10:SC
refant=2

had to move TECOR files to $HOME

5 GHz
Step 1:  VIPSPIPE

3C279  timer 1 0 44 00 1 0 45 40 for fringe-fit
calsour '3c279','oq208','j1310+3220','J0854+2006',''
interp 'ambg'

Step 3:

3 strong sources didn't reach the thermal noise.  Changed
these into "E" code calibrators:  0850+581, 1646+411, 1651+391
modeled in RR by hand and then re-ran step 3.

15 GHz

3C279  timer 1 00 40 0 1 00 42 0 0 for fringe-fit

Step 4:
doitall

Step 5:

run and go step5

EVPA calibration based on questionable VLA monitoring data
from July 7 and as far back as May 25 -- yuck.

VLA measurements (converted to degrees)
J0854 4860     66  -10   3C279* 450 -85   J1310* 23 -3
J0854 15000    42   3     3C279 501 -61   J1310 46   4  ; extrapolated with sm

3C279 and J1310 from data on July 7

VLBA observables:
J0854 4860     52  85    3C279 518 -3   J1310 25  83
   corr            -95            -88            -86  ; use -91 degrees
J0854* 15000   40  34     3C279 415  85   J1310 61 -16  
   corr           -31               34             20  ; use -31

3C279 C4 at pixxy 139 121 is 82 degrees after all corrections at 5 GHz
3C279 C4 at pixxy 280 240 is xxx degrees after all corrections at 15 GHz

SPLIT out *.TBC2 and reimage

reload into AIPS with loadall, then do step5pall

Analysis:

0843+575  
0850+581 is polarized at 5 GHz, 15
0851+580
1646+411 is polarized at 15 GHz
1651+391 is polarized at 5 GHz, 15 GHz 
16874022

make Faraday RM and other plots


Mystery of the high sigma sources in BF072C

0845+575 (sigma = 1.20 after automap)
Turned out to be some bad data on LA (one scan) and KP (one scan)

0851+580 (sigma = 1.34 after automap)
Turned out to be a bigger source than automap looked for.

Recommendations:

1. Make bigger maps!!! for all sources

2. Add up IFs in final imaging of 15 GHz data only