[daip] imagr

[Farhad Zadeh]

Hi Eric,
I have two of my summer students (high school and an undergrad)   working 
on imaging 15 overlapping fields 
covering the Orion nebula at 6cm in all four arrays. The students have 
combined all the uv data and have been playing around with multi-resolution
feature of imagr. They really need some guidance as to what parameters 
work from someone who has a lot of experience. Can you help us out with 
this. Three  resolutions corresponding to three  different arrays have 
been used  but only one low resolution image gets cleaned. What are the 
controlling parameters that are needed to make all different resolution images cleaned.
I appreciate your quick help on this.
Cheers,
Farhad

Here are the parameters they are using:
Inputs for Multi-Resolution:

AIPS 1: IMAGRPRM      0           0        Task enrichment parameters
AIPS 1:               0           0        (1) Antenna diameter (m)
AIPS 1:               0           0        (2) Source Spectral index
AIPS 1:               0           0        (3) Frequency scaling factor
AIPS 1:               0           0        (4) > 0 -> SDI Clean factor
AIPS 1:               0.5        0.03      (5) >0 => scale residuals
AIPS 1:               0.5         0.1      (6) Half-width in x of box
AIPS 1:               0.5      *rest 0     (7) Half-width in y of box
AIPS 1:                                     (8) Filter components whose
AIPS 1:                                    neighborhood is weaker than
AIPS 1:                                    IMAGRPRM(8) Jy.  0 -> don't
AIPS 1:                                    (9) Radius in pixels for the
AIPS 1:                                    IMAGRPRM(8) test.
AIPS 1:                                    (10) multiplier of image size
AIPS 1:                                    to get beam size: 0 => 2;
AIPS 1:                                    2, 1, 0.5 0.25 supported
AIPS 1:                                    (11-16) Multi-resolution
AIPS 1:                                    added controls
AIPS 1:                                    (17) spectral index radius
AIPS 1:                                         0 -> no correction
AIPS 1:                                    (19) Dynamic range limit
AIPS 1:                                    (20) Retry factor (see help)
AIPS 1: NGAUSS        3                    Number of resolutions to use
AIPS 1: WGAUSS       14           3.9      Resolutions in arc sec >= 0
AIPS 1:               1.2      *rest 0
AIPS 1: FGAUSS     *all 0                  Minimum flux for each resol.
AIPS 1: MAXPIXEL      0                    Maximum pixels searched in