iraf.net

From: Steve Howell <howell@noao.edu>
Date: September 7, 2005 11:49:15 AM MST
To: Frank Valdes <valdes@noao.edu>
Subject: Mini-Mo
Reply-To: howell@noao.edu
Framk, hi!do you remember if the mini-Mo WCS was fixed?
It was 180 degrees incorrect but i seem to remember you fixed it last
year.
Steve
From: Frank Valdes <valdes@noao.edu>
Date: September 19, 2005 9:57:20 AM MST
To: howell@noao.edu
Subject: Re: Mini-Mo
Hi Steve,No the WCS in the raw data has never been corrected for the 180
degree rotation, at least not by me. To fix I suggest I get
a recent exposure that might be used to not only correct the rotation
but verify the WCS; i.e. an exposure with a few stars
with some catalog coordinate information. I could change the WCS by
180 degrees if you want. Let me know and I will
make it a priority not to let it slip again.Yours,
Frank
From: Steve Howell <howell@noao.edu>
Date: September 21, 2005 10:23:13 AM MST
To: Frank Valdes <valdes@noao.edu>
Cc: heidis <heidis@noao.edu>
Subject: MiMO WCS info
Reply-To: howell@noao.edu
Frank, just a follow-up note to see where you mightbein the fix.
I believe heidi sent you some image to play with.
I ask as we have a "moving object" run starting fri and the observers
know how
to "fix" the WCS in their reductions, but it'd be good if we could
tell them
they need to fix it again (as they did last time_or that we have
fixed in
ourselves.Thanks, Steve
From: Frank Valdes <valdes@noao.edu>
Date: September 21, 2005 10:45:28 AM MST
To: howell@noao.edu
Cc: heidis <heidis@noao.edu>
Subject: Re: MiMO WCS info
Hi Steve,This fix is a high priority for me but I have an even higher priority
that I promised software to Gemini by Friday. So
my estimate is that I will fix this by a week from Friday but it will
not be fixed by this Friday. So for this run the observers
will have to be made aware that if they want to use the WCS in the
header they need to fix it by using MSCWCS
to rotate by 180 degrees.FrankFrom: Steve Howell <howell@noao.edu>
Date: September 21, 2005 11:27:52 AM MST
To: Frank Valdes <valdes@noao.edu>
Cc: heidis <heidis@noao.edu>
Subject: Re: MiMO WCS info
Reply-To: howell@noao.edu
Frank,
completely understood. Thanks for the fast fix by even next week.
WIYN appreciates it.
I'll tell the observers.
Steve
From: Heidi Schweiker <heidis@noao.edu>
Date: September 19, 2005 2:01:16 PM MST
To: Frank Valdes <valdes@noao.edu>
Cc: Steve Howell <showell@noao.edu>
Subject: minimo images - correcting the WCS
Hi Frank.Steve Howell mentioned you needed some images with MiniMo to correct
the 180degree error in the WCS. Abi Saha has some images on Taurus
(see below). Let me know if you need other images or anything else.Thanks for doing this!
Heidi
-------- Original Message --------
Date: Mon, 19 Sep 2005 13:56:43 -0700
From: Abhijit Saha <saha@noao.edu>
To: Heidi Schweiker <heidis@noao.edu>Hi Heidi, Go to ftp/pub/saha/WCSThere are 3 files: NGC2419.fits -- this is ***correctly*** WCS calibrated. 2 other exposures with MIMO: n3122.fits and n3126.fits (5 and
100s exposures in R respectively) on Oct 9, 2003.
these have the WCS inserted by the WIYN header maker (i.e.
incorrect).
Cheers
AbiFrom: Frank Valdes <valdes@noao.edu>
Date: September 29, 2005 9:08:50 AM MST
To: Heidi Schweiker <heidis@noao.edu>
Cc: Steve Howell <showell@noao.edu>
Subject: Re: minimo images - correcting the WCSHeidi or Steve,To what machine does Abi's email refer?FrankFrom: Steve Howell <howell@noao.edu>
Date: September 29, 2005 9:12:42 AM MST
To: Frank Valdes <valdes@noao.edu>, Heidi Schweiker <heidis@noao.edu>
Subject: Re: minimo images - correcting the WCS
Reply-To: howell@noao.eduFrank, I believe Abi is referring to taurus
Steve
From: Frank Valdes <valdes@noao.edu>
Date: September 29, 2005 10:50:12 AM MST
To: Steve Howell <howell@noao.edu>, Heidi Schweiker <heidis@noao.edu>
Subject: Re: minimo images - correcting the WCS
Hi,I have redone a new WCS solution based on Abi's NGC2419 exposure. In
addition to possibly having a more accurate WCS this fixes the 180
deg rotation error. The changes have been made on sand which I
believe is the normal MiniMo DCA machine. The changes are purely to
a few WCS values so it is unlikely that any error was introduced but
someone should check that no error appear in the DCA window when the
next exposure is taken. To verify the change took place an image
header listing of the first extension should show:CRPIX1 = 2068.91982855716 / Coordinate reference pixel
CRPIX2 = 1920.96807176208 / Coordinate reference pixel
CD1_1 = 1.62689552048809E-7 / Coordinate matrix
CD2_1 = 3.90504284674072E-5 / Coordinate matrix
CD1_2 = 3.90562210107738E-5 / Coordinate matrix
CD2_2 = -1.9498698587866E-7 / Coordinate matrixI apologize for not having done something about this sooner.FrankFrom: Steve Howell <howell@noao.edu>
Date: September 29, 2005 10:55:24 AM MST
To: Frank Valdes <valdes@noao.edu>
Cc: heidis <heidis@noao.edu>
Subject: Re: minimo images - correcting the WCS
Reply-To: howell@noao.edu
Frank, thanks SOSOSOSOSOOOOO much for this fix and in a very timely
manner.
WIYN appreciates it !
steve