1. No category

Recipe how to reduce the data we did
Makoto Miyoshi
2006.05.12
Points
Before SPLIT all the data points were kept and not abandoned. If good solutions were not found,
we put the point a value interpolated from adjacent good solutions.
At Fringe we used somewhat low SNR cut off, aparm (7) =3. We never averaged the IFs, channel
numbers in IF before SPLIT. Even at SPLIT we kept IF-numbers. We searched solutions for every
If at every TASK for getting calibration solutions.
AT CALIB, we used the image model followed Bower et al. (2004). Because the model is reliable
we got amplitude and phase solutions together (= A&P mode). We did not perform iterations between
CALIB and IMAGR for refining solutions. Namely we only used the CALIB once. At CALIB, we used
SNR cutoff level= 3, rather higher level than usual. For the data points whose good solution
was not found, we abandoned the points.
***FITLD*** data loading into AIPS.
SiO maser sources were observed for the purpose of amplitude calibrations, but in this reduction we did not
use them.
Observing schedule, frequency, sources are in the table 1.
***INDXR***
INDXR RELEASE ='31DEC05 ' /********* Start 13-FEB-2005 17:17:35
INDXR INNAME ='BS131B'
INDXR INCLASS ='UVSRT'
INDXR INSEQ =
1
INDXR INDISK =
3
INDXR CPARM( 1) = 1.00000E+01
INDXR CPARM( 2) = 6.00000E+01
INDXR CPARM( 3) = 1.74750E-02 (minute) =1.0485 second
Time interval in CL table is the same as the accumulation period of correlator.
=> CL 1(figure 1)
***ACCOR***
ACCOR RELEASE ='31DEC05 ' /********* Start 13-FEB-2005
ACCOR TIMERANG = beginning to end
ACCOR SN table = 8
ACCOR SOLINT = 0.1 minutes
==> SN 8 (figure 2)
***CLCAL***
CLCAL RELEASE ='31DEC05 ' /********* Start 13-FEB-2005
CLCAL OPCODE ='CALI' / MERG, CALI or SMOO
CLCAL SOURCES = ''
/ All sources selected
CLCAL SOUCODE =''
/ Source Cal code
CLCAL CALSOUR = ''
/ All calibrators selected
CLCAL QUAL =
-1 CALCODE = '
'
CLCAL /TIMERANG = beginning to end
CLCAL SUBARRAY = 0
17:35:30
21:28:52
CLCAL
CLCAL
CLCAL
CLCAL
CLCAL
CLCAL
ANTENNAS = 0
/ All antennas selected
GAINVER = 1, GAINUSE = 2 / CL table
INTERPOL = '2PT ' / Interpolation type
CUTOFF = 0.0 minutes / Interpolation limit
SNVER =
8 / SN table versions used
REFANT = 8 (=PT station)/ Reference antenna used
CL1+SN8 (ACCOR) => CL2 (figure 3)
****APCAL****
APCAL RELEASE: 31DEC05 START TIME: 10-FEB-2005
APCAL INNAME= BS131B.VBGLU.3.1
APCAL SUBA= 1 STOKES=
IF= 1 - 8
APCAL FQID= -1 TIMERNG= *** 0 0 0*** 0 0 0
APCAL TYVER= 9 GCVER=
5 SNVER=
5
APCAL OPCODE= CALI SOLINT= 0.0
APCAL BDEF= 1.000 ZALIM= 90.0 SPILL= 1 ALL FQ=
02:26:42
F
GC5 + TY9 => SN5 (figure 4)
***SNCOR****
SNCOR RELEASE ='31DEC05 ' /********* Start 10-FEB-2005
SNCOR SOURCES = ''
/All sources selected
SNCOR /Antennas included:
SNCOR ANTENNAS = 7
SNCOR /TIMERANG = beginning to end
SNCOR STOKES = '
' / Stokes type
SNCOR BIF = 3, EIF = 4/ IF range
SNCOR SUBARRAY = 1 GAINVER =
5 /SN table
SNCOR OPCODE = 'MULA' / Operation code
SNCOR SNCORPRM = 10.00000 / Multiplication factor
SNCOR
/
181 Records modified
02:29:41
SNCOR RELEASE ='31DEC05 ' /********* Start 10-FEB-2005 02:30:06
SNCOR SOURCES = ''
/All sources selected
SNCOR /Antennas included:
SNCOR ANTENNAS = 7
SNCOR /TIMERANG = beginning to end
SNCOR STOKES = '
' / Stokes type
SNCOR BIF =
3, EIF = 4/ IF range
SNCOR SUBARRAY = 1 GAINVER =
5 /SN table
SNCOR OPCODE = 'MULA' / Operation code
SNCOR SNCORPRM = 10.00000 / Multiplication factor
SNCOR
/
181 Records modified
Something was wrong at IF3&4, then using SNCOR we magnified the amplitudes 100 times.
It may be due to bag at 31DEC05version or bad compile.
***CLCAL****
CLCAL RELEASE ='31DEC05 ' /********* Start 14-FEB-2005
CLCAL OPCODE ='CALI' / MERG, CALI or SMOO
10:42:02
CLCAL SOURCES = ''
/ All sources selected
CLCAL SOUCODE ='
' / Source Cal code
CLCAL CALSOUR = ''
/ All calibrators selected
CLCAL QUAL =
-1 CALCODE = '
'
CLCAL /TIMERANG = beginning to end
CLCAL SUBARRAY = 0
CLCAL ANTENNAS = 0
/ All antennas selected
CLCAL GAINVER = 2, GAINUSE = 4 / CL table
CLCAL INTERPOL = '2PT ' / Interpolation type
CLCAL CUTOFF = 0.0 minutes / Interpolation limit
CLCAL SNVER =
5
5 / SN table versions used
CLCAL REFANT =
8 / Reference antenna used
CL2+SN5(APCAL) => CL4
***FRING***
FRING RELEASE ='31DEC05 ' /********* Start 14-FEB-2005 14:06:31
FRING /Calibrators included:
FRING CALSOUR = 'SGRA', 'NRAO530',‘OV236’
We searched parameters with the both of continuum sources.
FRING QUAL =
-1 CALCODE =
FRING FLAGVER =
1 /Flagging table used
FRING GAINUSE =
4 /CL table used
FRING IN2NAME='
' IN2CLASS='
'
FRING IN2SEQ=
0
IN2DISK= 0
FRING INVER =
1 /CC file version no.
FRING NMAPS = 0 /Number of clean images used
This means that point source is the image model.
FRING /TIMERANG = beginning to end
FRING SOLINT =
1.00 /Soln. inter. (min) ..integration time
FRING SUBARRAY = 0
FRING REFANT =
8 (PT station) /Reference antenna
FRING BCHAN, ECHAN =
1
64 (We used all channels)
FRING APARM(1) =
1 /Min. no antennas
FRING APARM(4) = -1 />0 => avg. freq. in an IF
FRING APARM(5) = -1 />0 => soln. for each IF
We searched parameters of each IF independently.
FRING APARM(7)= 3.0 /SNR cutoff
We set SNR cutoff level lower than usual.
FRING SNVER = 10 / Output SN table version
FRING UVRANGE(1)= 0.00000E+00 /Min. bl. full weight
FRING UVRANGE(2)= 1.00000E+15 /Max. bl. full weight
FRING WTUV = 0.00000E+00 /Weight outside annulus
FRING DPARM(1)=
1
/No. baseline combinations
FRING DPARM(2)= 150.0
/Delay win. (nsec)
FRING DPARM(3)= 150.0
/Rate win. (MHz)
FRING DPARM(4)= 0.00
/Input integ. time (sec)
FRING DPARM(5)= 1 /.gt.0 => no ls. soln.
FRING ANTWT= 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 /Ant. wt
=> SN10 (figure 5)
***CLCAL****
CLCAL RELEASE ='31DEC05 ' /********* Start 14-FEB-2005 21:07:42
CLCAL OPCODE ='CALI' / MERG, CALI or SMOO
CLCAL SOURCES = ''
/ All sources selected
CLCAL SOUCODE =' ' / Source Cal code
CLCAL CALSOUR = ''
/ All calibrators selected
CLCAL QUAL =
-1 CALCODE = '
'
CLCAL /TIMERANG = beginning to end
CLCAL SUBARRAY = 0
CLCAL ANTENNAS = 0
/ All antennas selected
CLCAL GAINVER = 4, GAINUSE = 6 / CL table
CLCAL INTERPOL = '2PT ' / Interpolation type
CLCAL CUTOFF = 0.0 minutes / Interpolation limit
CLCAL SNVER = 10
/ SN table versions used
CLCAL REFANT =
8( PT station) / Reference antenna used
CL4 + SN10 => CL6 (figure 6)
***BPASS***
BPASS Release ='31DEC05 ' /********* Start 15-FEB-2005
BPASS /Calibrators included:
BPASS CALSOUR = 'OV-236','NRAO530'
BPASS QUAL =
-1 CALCODE =
BPASS BPVER =
4 /Version of BP table written
BPASS FLAGVER =
1 /Flagging table used
BPASS UVRANGE(1)= 0.00000E+00 /Min. uv used
BPASS UVRANGE(2)= 0.00000E+00 /Max. uv used
BPASS / Data will be calibrated
BPASS GAINUSE =
6 /CL table used
BPASS IN2NAME='
' IN2CLASS='
'
BPASS IN2SEQ=
0
IN2DISK= 0
BPASS INVER =
1 /CC file version no.
BPASS NMAPS = 0 /Number of clean images used
BPASS /TIMERANG = beginning to end
BPASS / Average over whole time range
BPASS SUBARRAY = 1
BPASS REFANT =
8 /Reference antenna
BPASS SMOOTH = 3, 2.0,
3 /Spectral smoothing parms
BPASS / Bandpass not normalized
BPASS / Ch. 0 Avgd: Start, Stop, Inc
9 56
1 IF=
BPASS / Ch. 0 Avgd: Start, Stop, Inc
9 56
1 IF=
BPASS / Ch. 0 Avgd: Start, Stop, Inc
9 56
1 IF=
BPASS / Ch. 0 Avgd: Start, Stop, Inc
9 56
1 IF=
BPASS / Ch. 0 Avgd: Start, Stop, Inc
9 56
1 IF=
BPASS / Ch. 0 Avgd: Start, Stop, Inc
9 56
1 IF=
BPASS / Ch. 0 Avgd: Start, Stop, Inc
9 56
1 IF=
BPASS / Ch. 0 Avgd: Start, Stop, Inc
9 56
1 IF=
BPASS / Blanks in BP not interpolated
BPASS SOLTYPE = '
' /Gain solution method
BPASS ANTWT= 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
00:19:19
1
2
3
4
5
6
7
8
1.0 /Ant. wt
=>BP4
*** TBOUT,edit&TBIN *** Phase of BR station was strange, we then set to be 0 by editting
TBOUT /BP table version 4 of INNAME='BS131B
.UVSRT . 1'
TBOUT / copied to the text file BP4
TBOUT / 15-FEB-2005 12:58:11
TBIN OUTNAME='BS131B
' OUTCLASS='UVSRT '
TBIN OUTSEQ=
1
OUTDISK= 3
TBIN / Created BP table version 6 with
10 records
BP4->BP6
*****SPLIT*****
SPLIT
Task to split multi-source uv data to single source
Adverbs
Values
Comments
---------------------------------------------------------------also works on single files.
INNAME
'BS131B
'
Input UV file name (name)
INCLASS
'UVSRT '
Input UV file name (class)
INSEQ
1
Input UV file name (seq. #)
INDISK
3
Input UV file disk unit #
SOURCES
'SGRA
'
Source list
*rest ' '
We extracted the SgrA* data only.
QUAL
-1
Source qualifier -1=>all
CALCODE
'
'
Calibrator code '
'=>all
TIMERANG *all 0
Time range to copy
STOKES
'
'
Stokes type to pass.
SELBAND
-1
Bandwidth to select (kHz)
SELFREQ
-1
Frequency to select (MHz)
FREQID
-1
Freq. ID to select.
BIF
1
Lowest IF number 0=>all
EIF
8
Highest IF number 0=>all
BCHAN
1
Lowest channel number 0=>all
ECHAN
64
Highest channel number
SUBARRAY
0
Subarray, 0=>all
DOCALIB
1
If >0 calibrate data = 2 calibrate weights
GAINUSE
6
CL (or SN) table to apply
DOPOL
-1
If >0 correct polarization.
BLVER
-1
BL table to apply.
FLAGVER
1
Flag table version
DOBAND
1
If >0 apply bandpass cal.
Method used depends on value
of DOBAND (see HELP file).
BPVER
6
Bandpass table version
SMOOTH
*all 0
Smoothing function. See
HELP SMOOTH for details.
OUTCLASS '661
'
Output UV file name (class)
OUTSEQ
0
Output UV file name (seq. #)
OUTDISK
5
Output UV file disk unit #.
DOUVCOMP
APARM
1
1
1 (T) => compressed data
*rest 0
Control information:
1 = 1 => avg. freq. in IF
multi-channel out
NCHAV
64
Number of chan. to average.
(used if APARM(1) = 1)
<= 0 -> ALL
CHINC
64
Channel incr. between output
channels (used if APARM(1)=1)
We keep all IFs. Every IF is reduced to 1 ch from 64ch-integrations
ICHANSEL *all 0
Array of channel start, stop,
and increment numbers and IF
number to be used when
averaging in frequency.
(used if APARM(1) = 2, 3)
BADDISK
*all 0
Disks to avoid for scratch
Result of output
16151 SPLIT /
Previously flagged flagged by gain
kept
16152 SPLIT / Partially
127779
5906521
2017659
16153 SPLIT / Fully
0
2442
1903240
*****CALIB*****
CALIB: Task to determine calibration for data.
Adverbs
Values
Comments
---------------------------------------------------------------Input uv data.
INNAME
'SGRA
'
UV file name (name)
INCLASS
'661
'
UV file name (class)
INSEQ
1
UV file name (seq. #)
INDISK
5
UV file disk drive #
Data selection (multisource):
CALSOUR
*all ' '
Calibrator sources
QUAL
-1
Calibrator qualifier -1=>all
CALCODE
'
'
Calibrator code '
'=>all
SELBAND
-1
Bandwidth to select (kHz)
SELFREQ
-1
Frequency to select (MHz)
FREQID
-1
Freq. ID to select.
TIMERANG *all 0
Time range to use.
BCHAN
1
Lowest channel number 0=>all
ECHAN
0
Highest channel number
ANTENNAS *all 0
Antennas to select. 0=all
DOFIT
*all 0
Subset of ANTENNAS list for
which solns are desired. 0
=> all in ANTENNAS, < 0 all
but those in DOFIT
ANTUSE
*all 0
Mean gain is calculated
(CPARM(2)>0) using only the
listed antennas. See explain.
SUBARRAY
0
Subarray, 0=>all
UVRANGE
0
0
Range of uv distance for full
WTUV
0
weight
Weight outside UVRANGE 0=0.
Cal. info for input:
If >0 calibrate data
= 2 calibrate weights
GAINUSE
0
CL table to apply.
DOPOL
-1
If >0 correct polarization.
BLVER
-1
BL table to apply.
FLAGVER
-1
Flag table version
DOBAND
-1
If >0 apply bandpass cal.
Method used depends on value
of DOBAND (see HELP file).
BPVER
-1
Bandpass table version
SMOOTH
*all 0
Smoothing function. See
HELP SMOOTH for details.
CLEAN map. See HELP.
IN2NAME
'
'
Cleaned map name (name)
IN2CLASS '
'
Cleaned map name (class)
IN2SEQ
0
Cleaned map name (seq. #)
IN2DISK
0
Cleaned map disk unit #
INVERS
0
CC file version #.
NCOMP
*all 0
# comps to use for model.
1 value per field
FLUX
0
Lowest CC component used.
NMAPS
0
No. Clean map files
CMETHOD
'
'
Modeling method:
'DFT','GRID','
'
CMODEL
'
'
Model type: 'COMP','IMAG'
SMODEL
1
0
Source model, 1=flux,2=x,3=y
0
1
See HELP SMODEL for models.
7.120E-04 4.070E-04
79.8
This Gaussian shape is followed the average at 43GHz observations from Bower et al 04, and we
assumed the flux density to be 1 Jy.
Output uv data file.
OUTNAME
'
'
UV file name (name)
OUTCLASS '
'
UV file name (class)
OUTSEQ
0
UV file name (seq. #)
OUTDISK
0
UV file disk drive #
Solution control adverbs:
REFANT
8(PT station)
Reference antenna
SOLINT
0.2
Solution interval (min)
APARM
1
0
General parameters
0
0
1=min. no. antennas
0
0
2 > 0 => data divided
3
*rest 0
3 > 0 => avg. RR,LL
5 > 0 => avg. IFs.
6=print level, 1=good,
2 closure, 3 SNR
7=SNR cutoff (0=>5)
DOCALIB
-1
8=max. ant. # (no AN)
9 > 0 => pass failed soln
Phase-amplitude Parameters:
We set here the SNR cutoff is 3. searched for the solutions of each IF independently.)
SOLTYPE
'L1 '
Soln type,' ','L1','GCON'
SOLMODE
'A&P '
Soln. mode: 'A&P','P','P!A',
Because we know the image shape is reliable model, then go A&P solution directly.
'GCON'
SOLCON
0
Gain constraint factor.
MINAMPER
0
Amplitude closure error
regarded as excessive in
MINPHSER
0
Phase closure error regarded
as excessive in degrees
CPARM
*all 0
Phase-amp. parameters
1 = Min el for gain
normalization (deg)
2 >0 => normalize gain
3 avg. amp. closure err
4 avg. ph. closure err
5 >0 => scalar average
SNVER
ANTWT
GAINERR
BADDISK
0
*all 0
*all 0
*all 0
Output SN table, 0=>new table
Ant. weights (0=>1.0)
Std. Dev. of antenna gains.
Disk no. not to use for scratch files.
= > SN1
*****TACOP*****
SN1 =copy=> SN2
The solutions include very high amplitude ones, then we abandoned such points and smoothed the
amplitude solutions like below.
*****SNCOR*****
SNCOR
Task which applies various corrections to SN tables.
Adverbs
Values
Comments
---------------------------------------------------------------INNAME
'SGRA
'
Input UV file name (name)
INCLASS
'661
'
Input UV file name (class)
INSEQ
1
Input UV file name (seq. #)
INDISK
5
Input UV file disk unit #
SOURCES
*all ' '
Source list ' '=>all.
STOKES
'
'
Stokes type to process
SELBAND
-1
Bandwidth to select (kHz)
SELFREQ
-1
Frequency to select (MHz)
FREQID
-1
Freq. ID to select, 0=>all
BIF
1
Lowest IF number 0=>all
EIF
8
Highest IF number 0=>all
TIMERANG *all 0
Time range to use.
ANTENNAS *all 0
Antennas to correct.
SUBARRAY
0
Subarray; 0 => 1.
SNVER
OPCODE
SNCORPRM
2
SN table version to update
'CLPA' (clipping by amplitude) Operation code.See HELP
0.1
5
Parameters (see HELP SNCOR).
*rest 0
We kept solutions whose amplitude is greater-equal than 0.1 and less-equal than 5.
PHASPRM
*all 0
Parameters for OPCODE=XFER
BADDISK
*all 0
Disks to aviod for scratch
16190
16191
16192
16193
16194
16195
16196
16197
16198
16199
SNCOR RELEASE ='31DEC05 ' /********* Start 15-FEB-2005
15:06:06
SNCOR SOURCES = ''
/All sources selected
SNCOR ANTENNAS = 0
/All antennas selected
SNCOR /TIMERANG = beginning to end
SNCOR STOKES = '
' / Stokes type
SNCOR BIF =
1, EIF =
8/ IF range
SNCOR SUBARRAY = 1 GAINVER =
2 /SN table
SNCOR OPCODE = 'CLPA' / Operation code
SNCOR SNCORPRM =
0.10000 5.00000 / Valid range of ampl
SNCOR
/ 8165 Records modified
=> SN2
*****SNSMO*****
SNSMO
Task which smooths and filters Solution(SN) tables.
Adverbs
Values
Comments
---------------------------------------------------------------INNAME
'SGRA
'
Input UV file name (name)
INCLASS
'661'
Input UV file name (class)
INSEQ
0
Input UV file name (seq. #)
INDISK
5
Input UV file disk unit #
SOURCES
*all ' '
Source list ' '=>all.
DOBTWEEN
0
> 0 -> smooth all sources
together; else separate them
SELBAND
-1
Bandwidth to select (kHz)
SELFREQ
-1
Frequency to select (MHz)
FREQID
-1
Freq. ID to select, 0=>all
BIF
1
Lowest IF number 0=>all
EIF
8
Highest IF number 0=>all
TIMERANG *all 0
Time range to use.
ANTENNAS *all 0
Antennas to correct.
SUBARRAY
0
Subarray; 0 => all.
SAMPTYPE '
'
Smoothing function
BPARM
0.2 (=12min)
*rest 0
Smoothing parameters
CUTOFF
0
Cutoff for functional forms
DOBLANK
-1
Blanked value interpolation
SMOTYPE
'AMPL'(= smooth amp only) Data to smooth
CPARM
0.1
0
Range of allowed delays and
0
0
rates.
0
2
*rest 0
INVERS
2
Input SN table; 0=>highest
OUTVERS
3
Output SN table; 0=>new
REFANT
BADDISK
8
*all 0
Reference antenna 0=>pick.
Disks to avoid for scratch
=> SN3
*****IMAGR*****
IMAGR: Wide field imaging/Clean task
Adverbs
Values
Comments
---------------------------------------------------------------INNAME
'SGRA'
Input UV data (name)
INCLASS
'661'
Input UV data (class)
INSEQ
0
Input UV data (seq. #)
INDISK
5
Input UV data disk drive #
SOURCES
'SGRA
'
Source name
*rest ' '
QUAL
-1
Calibrator qualifier -1=>all
CALCODE
'
'
Calibrator code '
'=>all
TIMERANG
0
16
Time range to use
25
0
0
16
30
0
This is an example of time range.
SELBAND
-1
Bandwidth to select (kHz)
SELFREQ
-1
Frequency to select (MHz)
FREQID
-1
Freq. ID to select.
SUBARRAY
0
Sub-array, 0=>all
DOCALIB
2
If >0 calibrate data = 2 calibrate weights
GAINUSE
3
CL (or SN) table to apply
We calibrated the data with weights obtained at CALIB.
DOPOL
-1
If >0.5 correct polarization.
BLVER
-1
BL table to apply.
FLAGVER
-1
Flag table version
DOBAND
-1
If >0.5 apply bandpass cal.
Method used depends on value
of DOBAND (see HELP file).
BPVER
-1
Bandpass table version
SMOOTH
*all 0
Smoothing function. See
STOKES
'
'
Stokes parameters (see HELP)
BCHAN
1
Low freq. channel 0 for cont.
ECHAN
0
Highest freq channel
CHANNEL
0
Restart channel number
NCHAV
1
Number of chan. to average.
CHINC
1
Channel incr. between maps.
BIF
1
First IF in average.
EIF
8
Last IF in average.
We averaged all 8-IFs data here and make one map.
OUTNAME
'
'
Output image name (name)
OUTDISK
0
Output image disk drive #
OUTSEQ
0
Output seq. no.
OUTVER
0
CC ver. no (Continuum only)
*** SET OUTVER ON RESTARTS
IN2NAME
'
'
UV work file name
IN2CLASS
IN2SEQ
'
'
UV work file class
0
UV work file seq
*** SET TO KEEP WORK FILE
IN2DISK
0
UV work file disk
CELLSIZE 2.930E-06 2.930E-06
(X,Y) size of grid in asec
We used very small cell size nearly equal 3 micro arc-seconds.
IMSIZE
0
0
Minimum image size
NFIELD
1
Number of fields (max 4096)
DO3DIMAG
-1
> 0 => use different tangent
points for each field
FLDSIZE
1024
2048
Clean size of each field.
*rest 0
Imaging region size is 3 mas(east-west) * 6 mas(north-south).
RASHIFT
*all 0
RA shift per field (asec)
DECSHIFT *all 0
DEC shift per field (asec)
UVTAPER
857142.81 857142.81
(U,V) Gaussian taper
units are kilo-lambda
This means 6000km-taper in both of E-W & N-S directions.
UVRANGE
0
0
Min & max baseline (klambda)
GUARD
0
0
x,y guard band fractional radius
ROTATE
0
Rotate image CCW from N by ROTATE degrees
ZEROSP
*all 0
0-spacing fluxes and weights
SEE HELP!!
UVWTFN
' '
UV dist. weight function
blank => uniform
UVSIZE
0
0
Array size for doing uniform
weights. 0 -> actual field
size.
ROBUST
0
Robustness power: -5 -> pure
uniform weights, 5 => natural
UVBOX
0
Additional rows and columns
used in weighting.
UVBXFN
1
Box function type when UVBOX
> 0. 0 -> 1 round pill box.
XTYPE
5
Conv. function type in x
default spheroidal
YTYPE
5
Conv. function type in y
default spheroidal
XPARM
*all 0
Conv. function parms for x
YPARM
*all 0
Conv. function parms for y
NITER
20000
Maximum # of Clean components
BCOMP
*all 0
Begin at BCOMP component
Specify for each field.
ALLOKAY
0
For restart: > 0 => beams
okay, > 1 => work file too
NBOXES
1
Number of boxes for Clean
NB: field 1 only.
CLBOX
141
284
Four coordinates for each box
869
1708
*rest 0
We put a clean box around the center region covering the SgrA* image at 43GHz.
BOXFILE
*all ' '
Input file of field params
OBOXFILE *all ' '
Output file for final Clean boxes
GAIN
0.005
Clean loop gain
We subtracted the peak of dirty image very very slowly.
FLUX
0.01(for 5min integrations.) Minimum Clean component (Jy)
(0.005 for 15min integrations.)
MINPATCH
51
Min. BEAM half-width in AP.
BMAJ
4.000E-04
FWHM(asec) major axis Clean restoring beam.
BMIN
1.500E-04
FWHM(asec) minor axis Clean restoring beam.
BPA
0
Clean beam position angle
We fixed all restoring beam shapes. The major axis is north-south direction.
OVERLAP
0
1 => restore components to
PHAT
0
Prussian hat height.
FACTOR
0
Speedup factor see HELP
CMETHOD
'
'
Modeling method:
IMAGRPRM *all 0
Task enrichment parameters
NGAUSS
0
Number of resolutions to use
WGAUSS
*all 0
Resolutions in arc sec >= 0
FGAUSS
*all 0
Minimum flux for each resol.
MAXPIXEL
0
Maximum pixels searched in
DOTV
-1
Display residuals on TV ?
BADDISK
*all 0
Disks to avoid for scratch.