[AstroPy] pywcs problem on Linux

Nadezhda Dencheva dencheva@stsci....
Wed May 6 06:47:08 CDT 2009


Hi,

You are running an older version of pywcs.
I believe an upgrade to the latest release will fix this.


Nadia Dencheva

---- Original message ----
>Date: Wed, 6 May 2009 15:30:23 +0900
>From: astropy-bounces@scipy.org (on behalf of "OKUMURA, Akira" <oxon@ceres.phys.s.u-tokyo.ac.jp>)
>Subject: [AstroPy] pywcs problem on Linux  
>To: astropy@scipy.org
>
>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
>
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