[AstroPy] Handling IRAF at ccmap astrometry solution with Astropy

Laurent MICHEL laurent.michel at astro.unistra.fr
Wed Mar 25 05:56:10 EDT 2020


Dear Astropy,

In the project I'm working on (SVOM), I have to resolve image astrometry 
with parameters given as IRAF at ccmap input files (*.db).
I've pasted a sample below.
As I'm not an IRAF user and my application is Python based, I would like 
to know whether someone in the community would have some experience with 
handling such coordinate transformations with AstroPy or some associate 
package.

Regards
LM

> begin	first
> 	xrefmean	1006.983846153846
> 	yrefmean	1295.986153846154
> 	lngmean		51.92749369230773
> 	latmean		46.71962446153846
> 	pixsystem	logical
> 	coosystem	j2000
> 	projection	tan
> 	lngref		51.92764538984333
> 	latref		46.71980701217847
> 	lngunits	degrees
> 	latunits	degrees
> 	xpixref		1006.538812424377
> 	ypixref		1296.240113815674
> 	geometry	general
> 	function	legendre
> 	xishift		785.057480503327
> 	etashift	-1011.192209060798
> 	xmag		0.780016468878781
> 	ymag		0.7800388866873553
> 	xrotation	180.0054358489221
> 	yrotation	0.003364033436420988
> 	wcsxirms	0.03777045679395438
> 	wcsetarms	0.04621390005594472
> 	xirms		0.02446609811977102
> 	etarms		0.03292506146030702
> 	surface1	11
> 			2.	2.
> 			2.	2.
> 			2.	2.
> 			0.	0.
> 			1.	1.
> 			2048.	2048.
> 			1.	1.
> 			2048.	2048.
> 			-14.02246741249724	-211.9665257906808
> 			-798.346852301705	0.07577120489887789
> 			0.04687505246502031	798.3697991484097
> 	surface2	14
> 			2.	2.
> 			3.	3.
> 			3.	3.
> 			2.	2.
> 			1.	1.
> 			2048.	2048.
> 			1.	1.
> 			2048.	2048.
> 			0.01209115687180025	-0.01371667420039151
> 			-0.001595934377758362	0.01973382792045219
> 			0.01870940742458613	-0.03495580079513902
> 			-0.04682685192837127	0.05029843125259523
> 			0.02206659476379174	-0.06407294737100595
> 			0.09651497861498953	-0.103465418301487
> # Fri 10:57:09 13-Mar-2020



-- 
---- Laurent MICHEL              Tel  (33 0) 3 68 85 24 37
      Observatoire de Strasbourg  Fax  (33 0) 3 68 85 24 32
      11 Rue de l'Universite      Mail laurent.michel at astro.unistra.fr
      67000 Strasbourg (France)   Web  http://astro.u-strasbg.fr/~michel
---


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