fxinsert mangles header

[stockton]

I am having a problem using fxinsert to insert an image into a multiextension file containing other images. The image data is fine, but the header information gets messed up. For example, here are the first few lines of the image before insertion:

frame1c[800,800][real]:
No bad pixels, min=0., max=0. (old)
Line storage mode, physdim [800,800], length of user area 14337 s.u.
Created Tue 15:55:10 19-Jul-2011, Last modified Tue 17:01:12 19-Jul-2011
Pixel file "frame1c.fits" [ok]
EXTEND = F / File may contain extensions
ORIGIN = 'NOAO-IRAF FITS Image Kernel July 2003' / FITS file originator
DATE = '2011-07-20T01:55:10' / Date FITS file was generated
IRAF-TLM= '2011-07-20T03:01:12' / Time of last modification
NEXTEND = 4 / Number of standard extensions
FILENAME= 'ua192702m_c0f.fits' / name of file
FILETYPE= 'SCI ' / type of data found in data file

TELESCOP= 'HST ' / telescope used to acquire data
INSTRUME= 'WFPC2 ' / identifier for instrument used to acquire data
EQUINOX = 2000.0 / equinox of celestial coord. system

/ WFPC-II DATA DESCRIPTOR KEYWORDS

ROOTNAME= 'ua192702m' / rootname of the observation set
PROCTIME= 5.489992291667E+04 / Pipeline processing time (MJD)
OPUS_VER= 'OPUS 2009_1' / OPUS software system version number
CAL_VER = '2.5.3 (Sep 4, 2008)' / CALWP2 code version

and here are the first few lines of the file after insertion:


ua192702m_c0m[2][800,800][real]:
No bad pixels, min=0., max=0. (old)
Line storage mode, physdim [800,800], length of user area 24381 s.u.
Created Tue 16:30:48 19-Jul-2011, Last modified Tue 16:33:19 19-Jul-2011
Pixel file "ua192702m_c0m.fits" [ok]
NEXTEND = 4 / Number of standard extensions
FILENAME= 'ua192702m_c0f.fits' / name of file
EQUINOX = 2000.0 / equinox of celestial coord. system

/ WFPC-II DATA DESCRIPTOR KEYWORDS

ROOTNAME= 'ua192702m' / rootname of the observation set
PROCTIME= 5.489992291667E+04 / Pipeline processing time (MJD)
CAL_VER = '2.5.3 (Sep 4, 2008)' / CALWP2 code version


While many of the FITS keywords are present in both, some seem to be missing, and the order is changed. In particular, if one tries to access the extension by "filename[sci,2]", one gets an error.

Anyone have any suggestions? I tried fixing the header via "eheader", but this task doesn't seem to work on multiextension FITS files.

Thanks.[/i]

[fitz]

Is it possible the "missing" keywords were simply moved to the primary header because of inheritence? There are various rules by which the FITS kernel updates the header and in the case of FXINSERT I forget the particulars, but you might try adding the qualifier "[noinherit]" to the output name to suppress the inheritence, e.g.