[daip] AIPS - Help

[Murad Hamidouche]

Hello,

I am reducing VLA data for the first time, I am using AIPS for the first
time though. The data are continuum Q-band using the B array.

1/

I went through the suggested recipe in the cookbook to reduce my Q-band
data. However, I want to flag data that have an amplitude above certain
maximum amplitude, using CLIP task like this (the max amplitude I wanted
is 2 Jy) :

AIPS 1: CLIP      Task to flag data whose amplitude is out of range.
AIPS 1: Adverbs     Values                 Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: INNAME     '050417'                Input UV file name (name)
AIPS 1: INCLASS    'Q BAND'                Input UV file name (class)
AIPS 1: INSEQ         5                    Input UV file name (seq. #)
AIPS 1: INDISK        1                    Input UV file disk unit #
AIPS 1: OUTNAME    '050417      '          Output UV file name (name)
AIPS 1: OUTCLASS   'Q BAND'                Output UV file name (class)
AIPS 1: OUTSEQ        6                    Output UV file name (seq. #)
AIPS 1: OUTDISK       1                    Output UV file disk unit #.
AIPS 1: BCHAN         0                    Begin channel number.
AIPS 1: ECHAN         0                    End channel number.
AIPS 1: BIF           1                    First IF to consider
AIPS 1: EIF           2                    Highest IF to consider
AIPS 1: UVRANGE       0           0        UV range in which to apply
AIPS 1:                                    clip (kilo wavelengths)
AIPS 1: ANTENNAS   *all 0                  Antennas to consider 0=>all
AIPS 1: BASELINE   *all 0                  Baselines with ANTENNAS
AIPS 1: APARM         2           2        Flux range by polarization:
AIPS 1:               0           0        (1) = max. allowed parallel
AIPS 1:               0           0        (2) = max. allowed cross-pol.
AIPS 1:               0           1        (3) = min. allowed parallel
AIPS 1:               0           0        (4) = min. allowed cross-pol.


The task runs well but no data are flagged ? Even if I know that there
are bunch of visibilities above 2Jy and also checked this with UVFND task ?

Could you please let me know if there is any wrong parameter there ?

2/

I used the task 'IMAGR' and the map is displayed in my terminal AIPS TV.
I want now to make a contours image that also shows the beam (RA . vs.
DEC) and save it in a ps file. I used the task 'CNTR' but I have got
something different than an RA,DEC image.

Could you please let me know how to make that kind of .ps file ? Or if
there is a step I may have skipped after IMAGR ?

Thank you,

Cheers,
Murad

---
Murad Hamidouche
Astronomy Department
University of Illinois
1002 W Green st.
Urbana, IL 61801

Phone : (217) 333 9378
  Fax : (217) 244 7638