[daip] AG776: Question about error messages in FILLM

[Ciriaco Goddi]

Hello,

In the experiment AG776, observed on Feb 02 2008, VLA and EVLA antennas
were used as distinct
subarrays to observe different SiO transitions. With both subarrays we
also observed some scans
 in continuum mode, having two FREQIDs with two IFs each (BW1=6.25MHz and
BW2=50 MHz).
Uploading the VLA data with FILLM, I got these error messages for FREQID
1, IF2:

FILLM1 16:55:05 MCWAIT: Factor error; C(  2)= 0.107E+00 * C(  8)=
0.138E-09
FILLM1 16:55:05 MCWAIT: IF    =  2, FREQ    =  1, IS     =  3, STRM=  1
FILLM1 16:55:05 MCWAIT: IF inc=   12, FREQ inc= 24, POL inc=  3
FILLM1 16:55:05 MCWAIT: Factor error; C(  2)= 0.355E+00 * C(  8)=
0.138E-09
FILLM1 16:55:05 MCWAIT: IF    =  2, FREQ    =  1, IS     =  3, STRM=  1
FILLM1 16:55:05 MCWAIT: IF inc=   12, FREQ inc= 24, POL inc=  3
FILLM1 16:55:05 MCWAIT: Factor error; C(  4)= 0.628E+00 * C(  8)=
0.138E-09
FILLM1 16:55:05 MCWAIT: IF    =  2, FREQ    =  1, IS     =  2, STRM=  1
FILLM1 16:55:05 MCWAIT: IF inc=   12, FREQ inc= 24, POL inc=  3
FILLM1 16:55:05 MCWAIT: Factor error; C(  4)= 0.177E-01 * C(  8)=
0.138E-09
FILLM1 16:55:05 MCWAIT: IF    =  2, FREQ    =  1, IS     =  2, STRM=  1
FILLM1 16:55:05 MCWAIT: IF inc=   12, FREQ inc= 24, POL inc=  3

Inspecting the uv-files, the frequency table appears correct from LISTR:

FQID IF#      Freq(GHz)      BW(kHz)   Ch.Sep(kHz)  Sideband
   1   1      43.11588000    6250.0005   6250.0005      1
       2      42.76490000   50000.0039  50000.0039      1
   2   1      43.11588000    6250.0005   6250.0005      1
       2      43.46490000   50000.0039  50000.0039      1

but actually no data are present for FREQID 1, IF2.

Everything is OK for the EVLA subarray, which observed with a similar
frequency setup.

Could you please tell me what the messages mean?

Best regards,
Ciriaco

----------------------------------------------------------------------------
Ciriaco Goddi
Postdoc Fellow
Harvard-Smithsonian Center for Astrophysics
Radio and Geoastronomy Division
60 Garden St.  MS 42, Cambridge, MA 02138
http://cfa-www.harvard.edu/
Ph:  617-496-7636, Fax: 617-495-7345