[AstroPy] pywcs problem on Linux

OKUMURA, Akira oxon@ceres.phys.s.u-tokyo.ac...
Wed May 6 01:30:23 CDT 2009


Hello all,

I have installed pywcs in two environments.
(1) Scientific Linux 4.7 (64 bit)
  + Python 2.5.4 (r254:67916, May  6 2009, 07:09:17)
  + GCC 3.4.6 20060404 (Red Hat 3.4.6-10)] on linux2
  + pyfits-1.3
  + pywcs-1.3a1-4.3
(2) Red Hat Enterprise Linux 4 (32 bit).
  + Python 2.5.1 (r251:54863, Aug 24 2007, 16:22:50)
  + GCC 3.4.3 (TWW)] on linux2
  + pywcs-1.3a1-4.3
  + pyfits-2.1.1

But I got following errors even though it runs properly on Mac OS X  
10.5.
=== Error on (1) ===
 >>> hdulist = pyfits.open("cmap.fits")
 >>> wcs = pywcs.WCS(hdulist[0].header)
zsh: segmentation fault  python

=== Error on (2) ===
 >>> hdulist = pyfits.open("cmap.fits")
 >>> wcs = pywcs.WCS(hdulist[0].header)
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "/u/gl/oxon/tmp/lib/python2.5/site-packages/pywcs/pywcs.py",  
line 155, in __init__
     self.footprint = self._calcFootprint(header)
   File "/u/gl/oxon/tmp/lib/python2.5/site-packages/pywcs/pywcs.py",  
line 181, in _calcFootprint
     return self.all_pix2sky(corners)
   File "/u/gl/oxon/tmp/lib/python2.5/site-packages/pywcs/pywcs.py",  
line 307, in all_pix2sky
     return self._array_converter(self._all_pix2sky, *args, **kwargs)
   File "/u/gl/oxon/tmp/lib/python2.5/site-packages/pywcs/pywcs.py",  
line 294, in _array_converter
     return func(args[0], **kwargs)
SystemError: Python/getargs.c:1246: bad argument to internal function

Is there any tips on running pywcs with Linux ?

The FITS is as follows.

 >>> print hdulist[0].header
SIMPLE  =                    T / File conforms to NOST standard
BITPIX  =                   32 / Bits per pixel
NAXIS   =                    2 / No data is associated with this header
NAXIS1  =                  160 / Length of data axis 1
NAXIS2  =                  160 / Length of data axis 2
EXTEND  =                    T / Extensions may be present
COMMENT   FITS (Flexible Image Transport System) format is defined in  
'Astronomy
COMMENT   and Astrophysics', volume 376, page 359; bibcode: 2001A&A... 
376..359H
CTYPE1  = 'GLON-AIT'           / RA---%%%, %%% represents the  
projection method
CRPIX1  =                 80.5 / Reference pixel
CRVAL1  =                 211. / RA at the reference pixel
CDELT1  =                -0.25 / X-axis incr per pixel of physical  
coord at posi
CUNIT1  = 'deg     '           / Physical unit of X-axis
CTYPE2  = 'GLAT-AIT'           / DEC---%%%, %%% represents the  
projection method
CRPIX2  =                 80.5 / Reference pixel
CRVAL2  =                 -17. / DEC at the reference pixel
CDELT2  =                 0.25 / Y-axis incr per pixel of physical  
coord at posi
CUNIT2  = 'deg     '           / Physical unit of Y-axis
CROTA2  =                   0. / Image rotation (deg)
DATE    = '2009-04-01T15:34:22' / file creation date (YYYY-MM- 
DDThh:mm:ss U
FILENAME= 'cmap.fits'          /
TELESCOP= 'GLAST   '           /  name of telescope generating data
INSTRUME= 'LAT     '           /  name of instrument generating data
DATE-OBS= '2009-03-11T21:33:18.000' / start date and time of the  
observation (U
DATE-END= '2009-03-17T16:26:38.000' / end date and time of the  
observation (UTC
NDSKEYS =                    5
EQUINOX =                2000. / Equinox of RA & DEC specifications
OBSERVER= 'Peter Michelson'    /  GLAST/LAT PI
CREATOR = 'gtbin   '           / Software and version creating file
HISTORY                   LatCountMapTemplate,v 1.3 2005/04/05  
21:06:39 peachey
HISTORY Exp
CHECKSUM= 'c8JZf8JXc8JXc8JX'   / HDU checksum updated  
2009-04-01T06:34:22
DATASUM = '182648  '           / data unit checksum updated  
2009-04-01T06:34:22
DSTYP1  = 'TIME    '
DSUNI1  = 's       '
DSVAL1  = 'TABLE   '
DSREF1  = ':GTI    '
DSTYP2  = 'POS(RA,DEC)'
DSUNI2  = 'deg     '
DSVAL2  = 'CIRCLE(86.81257852,-6.005536809,20)'
DSTYP3  = 'CTBCLASSLEVEL'
DSUNI3  = 'dimensionless'
DSVAL3  = '3:      '
DSTYP4  = 'ENERGY  '
DSUNI4  = 'MeV     '
DSVAL4  = '200:20000'
DSTYP5  = 'ZENITH_ANGLE'
DSUNI5  = 'deg     '
DSVAL5  = '0:100   '


Regards,

OKUMURA, Akira oxon@ceres.phys.s.u-tokyo.ac.jp
Department of Physics, The University of Tokyo
7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033
TEL/FAX +81 3-5841-4173/4059
Skype : okumura.akira



More information about the AstroPy mailing list