[daip] IMAGR query

[Eric Greisen]

Shami Chatterjee writes:
 > Here are some parameters, and what I'm seeing:
 > AIPS 1: IMAGR: Wide field imaging/Clean task
 > AIPS 1: NPOINTS       7                    Number of chan. to average.
 > AIPS 1: CHINC         1                    Channel incr. between maps.
 > AIPS 1: BIF           1                    First IF in average.
 > AIPS 1: EIF           2                    Last IF in average.
 > AIPS 1: CELLSIZE      0.2         0.2      (X,Y) size of grid in asec
 > AIPS 1: IMSIZE     2048        2048        Minimum image size
 > AIPS 1: NFIELD        2                    Number of fields (max. 512)
 > AIPS 1: DO3DIMAG      1                    > 0 => use different tangent
 > AIPS 1: FLDSIZE    *all 0                  Clean size of each field.
 > AIPS 1: RASHIFT       0         720        RA shift per field (asec)
 > AIPS 1:            *rest 0
 > AIPS 1: DECSHIFT      0        -840        DEC shift per field (asec)
 > AIPS 1:            *rest 0
 > AIPS 1: ROBUST        3                    Robustness power: -5 -> pure
 > AIPS 1: GAIN          0.1                  Clean loop gain
 > AIPS 1: FLUX          0                    Minimum Clean component (Jy)
 > AIPS 1: MINPATCH    101                    Min. BEAM half-width in AP.
 > 
 > 
 > > IMAGR1: BGC Clean: using 1547 cell beam + residuals >     2.61 MilliJy
 > > IMAGR1:     2434 Residual map points loaded
 > > IMAGR1: Field   2 min. algorithm flux =  -8.923 MilliJy iter= 201
 > > IMAGR1: Field   2 Cleaned flux density =  789.725 MilliJy  201 comps
 > > IMAGR1: Total Cleaned flux density    =  789.725 MilliJy   201 comps
 > > IMAGR1: ALGSTB: Only  153 Rows In AP (Need   817)
 > > IMAGR1: ALGSTB: Ipol gridded model subtraction, chans 1 through 14
 > > IMAGR1: ALGSTB: Pass   1;  806- 664 Cells, with        0 Pts
 > > IMAGR1: ALGSTB: Pass   2;  805- 663 Cells, with        0 Pts
 > > IMAGR1: ALGSTB: Pass   3;  805- 663 Cells, with        0 Pts
 > > IMAGR1: ALGSTB: Pass   4;  805- 663 Cells, with        0 Pts
 > > IMAGR1: ALGSTB: Pass   5;  805- 663 Cells, with        0 Pts
 > [...]
 > > IMAGR1: ALGSTB: Pass 199;  805- 663 Cells, with        0 Pts
 > > IMAGR1: ALGSTB: Pass 200;  805- 663 Cells, with        0 Pts
 > [...]
 > > IMAGR1: ALGSTB: Pass1399;  805- 663 Cells, with        0 Pts
 > > IMAGR1: ALGSTB: Pass1400;  805- 663 Cells, with        0 Pts
 > 
 > How long is this expected to continue?

Forever - you are in a loop an erroneous one.  Something has gone very
wrong.  It should never have 0 pts and it should never repeat the row
range numbers.  Please send me the IMHEAD and tell me what version of
aips you are running and what the AP size is.

Eric