CCDSEC and DATASEC what is the problem ?

Francisco Valdes wrote on Mar 23, 2006

From: pierre Leisy <pleisy@ing.iac.es ([email]pleisy@ing.iac.es[/email])>
Date: March 13, 2006 12:51:34 PM MST
To: valdes@noao.edu ([email]valdes@noao.edu[/email])
Cc: fvaldes@noao.edu ([email]fvaldes@noao.edu[/email])
Subject: CCDSEC and DATASEC  what is the problem ?

Hi Frank,

Just a rapid   question and   (hopefully several  YES or NO answers).

I am Astronome Support at the ING (La Palma) and try to do a AF2/WYFFOS multi-fiber pipeline software using
IRAF and DOFIBER packages.

I have an anoying and "stupid" problem with  the  "usual" DATASEC and CCDSEC  error ... I start to get mad about this ;-)

The AF2/WYFFOS  FITS headers does not  contains either keywords ... but has 2727 lines (160 fibers) !!

The CCDPROC does not complains when the CCD is NOT binned  CCDSUM = '1 1' ... BUT always fails when binned 2x2
which is the mostly used SETUP.

I tried to put the 2 keywords in the headers, put and remove them ... try various values ... tried to put bin 1x1 and decrease
the size of the CCD ....
I think I tried everything ... same answer  "Size of DATASEC and CCDSEC do not agree "

These are the only section found in the header ... mostly at the end of the 2727 lines !!!
---------------------------------------------------------------------------------------------------------
WINSEC1 = '[1:4300,1:4200], enabled        ' / Readout window 1 (d-space)
WINSEC2 = '[0:0,0:0], disabled             ' / Readout window 2 (d-space)
WINSEC3 = '[0:0,0:0], disabled             ' / Readout window 3 (d-space)
WINSEC4 = '[0:0,0:0], disabled             ' / Readout window 4 (d-space)
BIASSEC = '[5:1075,2053:2095]              ' / Bias pixels.
TRIMSEC = '[27:1051,1:2050]                ' / Illuminated pixels.
RTDATSEC= '[1:2150,1:2100]                 ' / Location in d-space for RTD.

The detector is made from 2 CCDs
X size of digitised area in pixels (each ccd)  2154
Y size of digitised area in pixels (each ccd) 4200
X size of useful imaging area ( each ccd ) 2048
Y size of useful imaging area ( each ccd ) 4100
X start of useful imaging area ( each ccd ) 53
When windowing the mosaic is considered a single large chip measuring 4308 x 4200 pixels.

Is this a problem ? ... we usually window it to a 4300x4200 window.

Is the header totally NON-standard ?  but why this works without binning ?
Is the header TOO long ?

Any clue to solve this ?
I would greatly appreciate because I already spent many hours on the bugs reports about this and no result at all.
deleting CCDSEC does not work ...
and HEDITing
CCDSEC  = '[1:2150,1:2100]'
DATASEC = '[1:2150,1:2100]'
does not seems to do anything.

Is my IRAF setup guilty (but this happens on a MAC OX, a LINUX or a SUN).

Many thanks for your help,

Pierre Leisy

From: pierre Leisy <pleisy@ing.iac.es ([email]pleisy@ing.iac.es[/email])>
Date: March 14, 2006 7:48:59 AM MST
To: fvaldes@noao.edu ([email]fvaldes@noao.edu[/email])
Subject: SOLVED  problem  DATASEC / CCDSEC

Sorry Frank,

just forget about the problem ... I fixed it ...
Finally I found in more GOOGLE hints  ;-)

That CCDSEC is   "UNBINNED"  ... so  DATASEC=[1:2100,1:2100]  and CCDSEC=[1:4300,1:4200]   is working  ;-)

Maybe you should put it in your examples ... this will solve many "BINNED"  problems ;-)

Cheers,

Pierre

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Last post on Mar 23, 2006