! Started logfile: 1257+145_S.log on Wed Mar 25 13:45:34 1998
observe 1257+145_S.edt
! Reading UV FITS file: 1257+145_S.edt
! AN table 1: 43 integrations on 45 of 45 possible baselines.
! Apparent sampling: 0.67907 visibilities/baseline/integration-bin.
! Found source: 1257+145
! 
! There are 4 IFs, and a total of 4 channels:
! 
!  IF  Channel    Frequency  Freq offset  Number of   Overall IF
!       origin    at origin  per channel   channels    bandwidth
!  ------------------------------------------------------------- (Hz)
!  01        1  2.22049e+09        8e+06          1        8e+06
!  02        2  2.23049e+09        8e+06          1        8e+06
!  03        3  2.29049e+09        8e+06          1        8e+06
!  04        4  2.32049e+09        8e+06          1        8e+06
! 
! Polarization(s): RR
! 
! Read 422 lines of history.
! 
! Reading 5256 visibilities.
print "***********************************"
! *********************************** 
print "*** Using gonzo instruction set ***"
! *** Using gonzo instruction set *** 
print "***********************************"
! *********************************** 
float field_size
field_size = 1024
float field_cell
field_cell = 0.5
integer clean_niter
clean_niter = 50
float clean_gain
clean_gain = 0.03
float dynam
dynam = 7.0
float win_mult
win_mult = 1.8
float solint
solint = 2.0/6.0
logical doflt
doflt = true
logical doamp
float new_peak
float flux_cutoff
mapsize field_size,field_cell
! Map grid = 1024x1024 pixels with 0.500x0.500 milli-arcsec cellsize.
select
! Selecting polarization: RR,  channels: 1..4
! Reading IF 1 channels: 1..1
! Reading IF 2 channels: 2..2
! Reading IF 3 channels: 3..3
! Reading IF 4 channels: 4..4
startmod
! Applying default point source starting model.
! Performing phase self-cal
! Adding 1 model components to the UV plane model.
! The established model now contains 1 components and 1 Jy
! 
! Correcting IF 1.
!  A total of 160 telescope corrections were flagged in sub-array 1.
! 
! Correcting IF 2.
!  A total of 138 telescope corrections were flagged in sub-array 1.
! 
! Correcting IF 3.
!  A total of 138 telescope corrections were flagged in sub-array 1.
! 
! Correcting IF 4.
!  A total of 138 telescope corrections were flagged in sub-array 1.
! 
! Fit before self-cal, rms=0.447353Jy  sigma=2.735332
! Fit after  self-cal, rms=0.446745Jy  sigma=2.734265
! clrmod: Cleared the established, tentative and continuum models.
! Redundant starting model cleared.
uvweight 2,-1
! Uniform weighting binwidth: 2 (pixels).
! Gridding weights will be scaled by errors raised to the power -1.
! Radial weighting is not currently selected.
doamp = false
flux_cutoff = imstat(rms) * dynam
! Inverting map and beam 
! Estimated beam: bmin=3.119 mas, bmaj=6.991 mas, bpa=-4.289 degrees
! Estimated noise=2.45389 mJy/beam.
repeat
  if (peak(flux) > flux_cutoff) peakwin win_mult
  clean clean_niter,clean_gain
  flux_cutoff = imstat(rms) * dynam
  selfcal doamp, doflt, solint
  new_peak = peak(flux)
  until(new_peak<=flux_cutoff)
! Added new window around map position (0, 0).
! clean: niter=50  gain=0.03  cutoff=0
! Component: 050  -  total flux cleaned = 0.441338 Jy
! Total flux subtracted in 50 components = 0.441338 Jy
! Clean residual min=-0.026157 max=0.123090 Jy/beam
! Clean residual mean=-0.000118 rms=0.008701 Jy/beam
! Combined flux in latest and established models = 0.441338 Jy
! Performing phase self-cal over 0.333333 minute time intervals
! Adding 1 model components to the UV plane model.
! The established model now contains 1 components and 0.441338 Jy
! 
! Correcting IF 1.
! 
! Correcting IF 2.
! 
! Correcting IF 3.
! 
! Correcting IF 4.
! 
! Fit before self-cal, rms=0.173672Jy  sigma=1.063480
! Fit after  self-cal, rms=0.173672Jy  sigma=1.063480
! Inverting map 
! clean: niter=50  gain=0.03  cutoff=0
! Component: 050  -  total flux cleaned = 0.0995697 Jy
! Total flux subtracted in 50 components = 0.0995697 Jy
! Clean residual min=-0.012877 max=0.034719 Jy/beam
! Clean residual mean=-0.000051 rms=0.003885 Jy/beam
! Combined flux in latest and established models = 0.540907 Jy
! Performing phase self-cal over 0.333333 minute time intervals
! Adding 6 model components to the UV plane model.
! The established model now contains 6 components and 0.540907 Jy
! 
! Correcting IF 1.
! 
! Correcting IF 2.
! 
! Correcting IF 3.
! 
! Correcting IF 4.
! 
! Fit before self-cal, rms=0.119940Jy  sigma=0.732713
! Fit after  self-cal, rms=0.119908Jy  sigma=0.732522
! Inverting map 
! clean: niter=50  gain=0.03  cutoff=0
! Component: 050  -  total flux cleaned = 0.0350566 Jy
! Total flux subtracted in 50 components = 0.0350566 Jy
! Clean residual min=-0.012365 max=0.014630 Jy/beam
! Clean residual mean=-0.000028 rms=0.002804 Jy/beam
! Combined flux in latest and established models = 0.575964 Jy
! Performing phase self-cal over 0.333333 minute time intervals
! Adding 7 model components to the UV plane model.
! The established model now contains 11 components and 0.575964 Jy
! 
! Correcting IF 1.
! 
! Correcting IF 2.
! 
! Correcting IF 3.
! 
! Correcting IF 4.
! 
! Fit before self-cal, rms=0.112273Jy  sigma=0.685201
! Fit after  self-cal, rms=0.112220Jy  sigma=0.684874
! Inverting map 
print "****************************************"
! **************************************** 
print "*** Finished Uniform Weighting CLEAN ***"
! *** Finished Uniform Weighting CLEAN *** 
print "****************************************"
! **************************************** 
uvweight 0,-1
! Uniform weighting is not currently selected.
! Gridding weights will be scaled by errors raised to the power -1.
! Radial weighting is not currently selected.
win_mult = win_mult * 1.6
clean_niter = clean_niter * 2
dynam = dynam - 0.5
doamp = false
flux_cutoff = imstat(rms) * dynam
! Inverting map and beam 
! Estimated beam: bmin=3.71 mas, bmaj=7.877 mas, bpa=-3.869 degrees
! Estimated noise=1.80733 mJy/beam.
repeat
  if (peak(flux) > flux_cutoff) peakwin win_mult
  clean clean_niter,clean_gain
  flux_cutoff = imstat(rms) * dynam
  selfcal doamp, doflt, solint
  new_peak = peak(flux)
  until(new_peak<=flux_cutoff)
! clean: niter=100  gain=0.03  cutoff=0
! Component: 050  -  total flux cleaned = 0.0152668 Jy
! Component: 100  -  total flux cleaned = 0.0225138 Jy
! Total flux subtracted in 100 components = 0.0225138 Jy
! Clean residual min=-0.008247 max=0.006637 Jy/beam
! Clean residual mean=0.000017 rms=0.001570 Jy/beam
! Combined flux in latest and established models = 0.598478 Jy
! Performing phase self-cal over 0.333333 minute time intervals
! Adding 21 model components to the UV plane model.
! The established model now contains 32 components and 0.598478 Jy
! 
! Correcting IF 1.
! 
! Correcting IF 2.
! 
! Correcting IF 3.
! 
! Correcting IF 4.
! 
! Fit before self-cal, rms=0.110447Jy  sigma=0.673760
! Fit after  self-cal, rms=0.110370Jy  sigma=0.673286
! Inverting map 
print "****************************************"
! **************************************** 
print "*** Finished Natural Weighting CLEAN ***"
! *** Finished Natural Weighting CLEAN *** 
print "****************************************"
! **************************************** 
gscale true
! Performing overall amplitude self-cal
! 
! Correcting IF 1.
!  Telescope amplitude corrections in sub-array 1:
!   BR        1.01     FD        0.99     HN        1.02     KP        0.99     
!   LA        1.01     MK        0.97     NL        1.00*    OV        1.00     
!   PT        1.03     SC        1.02     
! 
! 
! Correcting IF 2.
!  Telescope amplitude corrections in sub-array 1:
!   BR        1.00     FD        0.99     HN        1.10     KP        0.98     
!   LA        1.00     MK        1.00     NL        0.90     OV        0.99     
!   PT        1.01     SC        1.03     
! 
! 
! Correcting IF 3.
!  Telescope amplitude corrections in sub-array 1:
!   BR        1.01     FD        0.99     HN        1.00     KP        1.00     
!   LA        0.99     MK        0.99     NL        1.00     OV        0.98     
!   PT        1.02     SC        1.00     
! 
! 
! Correcting IF 4.
!  Telescope amplitude corrections in sub-array 1:
!   BR        0.99     FD        1.00     HN        1.05     KP        1.00     
!   LA        1.01     MK        0.98     NL        0.92     OV        0.98     
!   PT        1.00     SC        1.03     
! 
! 
! Fit before self-cal, rms=0.110370Jy  sigma=0.673286
! Fit after  self-cal, rms=0.108484Jy  sigma=0.659618
dynam = dynam - 0.5
doamp = false
flux_cutoff = imstat(rms) * dynam
! Inverting map and beam 
! Estimated beam: bmin=3.72 mas, bmaj=7.909 mas, bpa=-4.071 degrees
! Estimated noise=1.80167 mJy/beam.
repeat
  if (peak(flux) > flux_cutoff) peakwin win_mult
  clean clean_niter,clean_gain
  flux_cutoff = imstat(rms) * dynam
  selfcal doamp, doflt, solint
  new_peak = peak(flux)
  until(new_peak<=flux_cutoff)
! clean: niter=100  gain=0.03  cutoff=0
! Component: 050  -  total flux cleaned = 0.00123544 Jy
! Component: 100  -  total flux cleaned = 0.0011008 Jy
! Total flux subtracted in 100 components = 0.0011008 Jy
! Clean residual min=-0.005367 max=0.004802 Jy/beam
! Clean residual mean=0.000006 rms=0.001222 Jy/beam
! Combined flux in latest and established models = 0.599579 Jy
! Performing phase self-cal over 0.333333 minute time intervals
! Adding 12 model components to the UV plane model.
! The established model now contains 40 components and 0.599578 Jy
! 
! Correcting IF 1.
! 
! Correcting IF 2.
! 
! Correcting IF 3.
! 
! Correcting IF 4.
! 
! Fit before self-cal, rms=0.108412Jy  sigma=0.659156
! Fit after  self-cal, rms=0.108404Jy  sigma=0.659030
! Inverting map 
dynam = dynam - 1.0
doamp = true
solint = solint * 1.5
flux_cutoff = imstat(rms) * dynam
repeat
  if (peak(flux) > flux_cutoff) peakwin win_mult
  clean clean_niter,clean_gain
  flux_cutoff = imstat(rms) * dynam
  selfcal doamp, doflt, solint
  new_peak = peak(flux)
  until(new_peak<=flux_cutoff)
! clean: niter=100  gain=0.03  cutoff=0
! Component: 050  -  total flux cleaned = 7.88109e-05 Jy
! Component: 100  -  total flux cleaned = 2.044e-05 Jy
! Total flux subtracted in 100 components = 2.044e-05 Jy
! Clean residual min=-0.005265 max=0.004749 Jy/beam
! Clean residual mean=0.000006 rms=0.001206 Jy/beam
! Combined flux in latest and established models = 0.599599 Jy
! Performing amp+phase self-cal over 0.5 minute time intervals
! Adding 14 model components to the UV plane model.
! The established model now contains 44 components and 0.599599 Jy
! 
! Correcting IF 1.
! 
! Correcting IF 2.
! 
! Correcting IF 3.
! 
! Correcting IF 4.
! 
! Fit before self-cal, rms=0.108364Jy  sigma=0.658778
! Fit after  self-cal, rms=0.105851Jy  sigma=0.639961
! Inverting map and beam 
! Estimated beam: bmin=3.724 mas, bmaj=7.92 mas, bpa=-3.987 degrees
! Estimated noise=1.80514 mJy/beam.
doamp = false
solint = solint / 1.5
flux_cutoff = imstat(rms) * dynam
repeat
  if (peak(flux) > flux_cutoff) peakwin win_mult
  clean clean_niter,clean_gain
  flux_cutoff = imstat(rms) * dynam
  selfcal doamp, doflt, solint
  new_peak = peak(flux)
  until(new_peak<=flux_cutoff)
! clean: niter=100  gain=0.03  cutoff=0
! Component: 050  -  total flux cleaned = 0.00135667 Jy
! Component: 100  -  total flux cleaned = 0.00144958 Jy
! Total flux subtracted in 100 components = 0.00144958 Jy
! Clean residual min=-0.004860 max=0.004258 Jy/beam
! Clean residual mean=0.000007 rms=0.001045 Jy/beam
! Combined flux in latest and established models = 0.601049 Jy
! Performing phase self-cal over 0.333333 minute time intervals
! Adding 10 model components to the UV plane model.
! The established model now contains 48 components and 0.601049 Jy
! 
! Correcting IF 1.
! 
! Correcting IF 2.
! 
! Correcting IF 3.
! 
! Correcting IF 4.
! 
! Fit before self-cal, rms=0.105811Jy  sigma=0.639701
! Fit after  self-cal, rms=0.105808Jy  sigma=0.639636
! Inverting map 
print "***********************************"
! *********************************** 
print "*** Finished Amplitude Self-Cal ***"
! *** Finished Amplitude Self-Cal *** 
print "***********************************"
! *********************************** 
save 1257+145_S
! Writing UV FITS file: 1257+145_S.uvf
! Writing 48 model components to file: 1257+145_S.mod
! wwins: Wrote 1 windows to 1257+145_S.win
! restore: Substituting estimate of restoring beam from last 'invert'.
! Restoring with beam: 3.724 x 7.92 at -3.987 degrees (North through East)
! Clean map  min=-0.0046859  max=0.56254 Jy/beam
! Writing clean map to FITS file: 1257+145_S.fits
! Writing difmap environment to: 1257+145_S.par
print "****************************"
! **************************** 
print "*** Now, make some plots ***"
! *** Now, make some plots *** 
print "****************************"
! **************************** 
device 1257+145_Suv.ps/vps,1,2
! Attempting to open device: '1257+145_Suv.ps/vps'
radplot
! Using default options string "m1"
uvplot
device 1257+145_Sim.ps/vps
! Attempting to open device: '1257+145_Sim.ps/vps'
uvweight 0,-1
! Uniform weighting is not currently selected.
! Gridding weights will be scaled by errors raised to the power -1.
! Radial weighting is not currently selected.
loglevs -1,2048,2
! The new contour levels are:
!  -1 1 2 4 8 16 32 64 128 256 512 1024 2048
cmul = imstat(rms)*3
! Inverting map and beam 
! Estimated beam: bmin=3.724 mas, bmaj=7.92 mas, bpa=-3.987 degrees
! Estimated noise=1.80514 mJy/beam.
mappl cln
! restore: Substituting estimate of restoring beam from last 'invert'.
! Restoring with beam: 3.724 x 7.92 at -3.987 degrees (North through East)
! Clean map  min=-0.0046859  max=0.56254 Jy/beam
quit
! Quitting program
! Log file 1257+145_S.log closed on Wed Mar 25 13:47:24 1998