astrometry works only after removing FITS header

[Prajwel Joseph]

Hi, 

For some of the FITS files with me, nova.astrometry.net works only after removing the header information. Could you let me know what all header information is read by the software so that I don't need to delete whole header data each time? 

Thank you for making such a great software. It really helps. 

[Dustin Lang]

Hi,
Could you please send a link to an example image before and after removing the header?
Thanks!
--dustin

[Dustin Lang]

Also: what does "fitsverify" say about your FITS images?  Perhaps you have errors in the headers?  Nova.astrometry.net can be very picky about exact FITS adherence.

cheers,
--dustin

[Prajwel Joseph]

Sorry for the VERY late reply. I forgot that I had asked this question here. The issue does not arise when I compile and use the astrometry code on my machine. I believe this problem is exclusive to nova.astrometry.net. Please find below the output of FITSVERIFY. The same 5 warnings are there for all the FITS images with me (2 are due to checksum, which is understandable). I find the keywords CREATOR, DATE & TELESCOP repeated. Is any of this causing nova.astrometry.net to fail? Unfortunately, I cannot share the image since the data is not public yet.


              fitsverify 4.16 (CFITSIO V3.370)             
              --------------------------------             
 
 
File: /home/prajwel/test_astrometry/test.fits

1 Header-Data Units in this file.
 
=================== HDU 1: Primary Array ===================
 
*** Warning: Keyword CREATOR is duplicated in card #16 and card #20.
*** Warning: Keyword DATE is duplicated in card #15 and card #26.
*** Warning: Keyword TELESCOP is duplicated in card #21 and card #49.
*** Warning: Data checksum is not consistent with  the DATASUM keyword
*** Warning: HDU checksum is not in agreement with CHECKSUM.
 
 77 header keywords
 
 32-bit floating point pixels,  2 axes (4800 x 4800),
 
++++++++++++++++++++++ Error Summary  ++++++++++++++++++++++
 
 HDU#  Name (version)       Type             Warnings  Errors
 1                          Primary Array    5         0    
 
**** Verification found 5 warning(s) and 0 error(s). ****

[Dustin Lang]

Hi,

I think nova normally handles "warnings" but not "errors" from fitsverify.

It's really hard to diagnose anything without being able to see an example file.  Maybe you could replace the pixels of one of your images with zeros, and submit that to nova and send the link?  Assuming the problem is with the header cards and not the data, that should be enough to figure out what nova is doing.

cheers,
--dustin