[daip] questions on vla data analysis
Yoshiaki Hagiwara
hagi at mpifr-bonn.mpg.de
Tue Nov 6 04:29:00 EST 2001
I am working on VLA spectral line data with AIPS, while running BPASS
there
appeared messages like below.
BPASS1: LINE & CHANNEL 0 FILES HAVE DIFFERENT NO. VIS. POINTS
BPASS1: Purports to die of UNNATURAL causes
I typed imh and found that #visibility is different between CH.0 and
LINE data. The difference of the total number is only 1. For this
reason, there might exist something problematic with my data. Could you
answer this question for me? At least I wish to know how to
run BPASS, regardless of this #visibility problem. Thank you.
AIPS 1: Image=MULTI (UV) Filename=NGC6240 .CH 0 . 1
AIPS 1: Telescope=VLA Receiver=VLA
AIPS 1: Observer=AH759 User #= 1018
AIPS 1: Observ. date=01-OCT-2001 Map date=06-NOV-2001
AIPS 1: # visibilities 184471 Sort order TB
AIPS 1: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN BASELINE TIME1
AIPS 1: SOURCE FREQSEL WEIGHT SCALE
AIPS 1: ----------------------------------------------------------------
AIPS 1: Type Pixels Coord value at Pixel Coord incr Rotat
AIPS 1: COMPLEX 1 1.0000000E+00 1.00 1.0000000E+00 .00
AIPS 1: FREQ 1 2.1672570E+10 1.00 4.6875000E+06 .00
AIPS 1: STOKES 1 -1.0000000E+00 1.00 -1.0000000E+00 .00
AIPS 1: IF 1 1.0000000E+00 1.00 1.0000000E+00 .00
AIPS 1: RA 1 00 00 0 .000 1.00 3600.000 .00
AIPS 1: DEC 1 00 00 0 .000 1.00 3600.000 .00
AIPS 1: ----------------------------------------------------------------
AIPS 1: Image=MULTI (UV) Filename=NGC6240 .LINE . 1
AIPS 1: Telescope=VLA Receiver=VLA
AIPS 1: Observer=AH759 User #= 1018
AIPS 1: Observ. date=01-OCT-2001 Map date=06-NOV-2001
AIPS 1: # visibilities 184472 Sort order TB
AIPS 1: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN BASELINE TIME1
AIPS 1: SOURCE FREQSEL WEIGHT SCALE
AIPS 1: ----------------------------------------------------------------
AIPS 1: Type Pixels Coord value at Pixel Coord incr Rotat
AIPS 1: COMPLEX 1 1.0000000E+00 1.00 1.0000000E+00 .00
AIPS 1: FREQ 127 2.1672570E+10 64.00 4.8828125E+04 .00
AIPS 1: STOKES 1 -1.0000000E+00 1.00 -1.0000000E+00 .00
AIPS 1: IF 1 1.0000000E+00 1.00 1.0000000E+00 .00
AIPS 1: RA 1 00 00 0 .000 1.00 3600.000 .00
AIPS 1: DEC 1 00 00 0 .000 1.00 3600.000 .00
AIPS 1: ----------------------------------------------------------------
cheers,
--
Yoshiaki Hagiwara
Postdoctoral Research Fellow at
Max-Planck-Institut fuer Radioastronomie
Auf dem Huegel 69 D-53121 Bonn/Germany
TEL.: +49-[0]228-525292 (direct), FAX: +49-[0]228-525229
Email: hagi at mpifr-bonn.mpg.de
http://www.mpifr-bonn.mpg.de/staff/hagiwara/
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