Hi All, I want to use astrometrica for WCS insertion into the FITS header for a imaging mosaic project. My files for astrometrica are all 32bit FITS. (these...
... Unfortunately, there is no workaround. Astrometrica clips the data already when reading the image files (internally, it stores the values as 16 bit...
Hello Herbert, Thank you for the clarification. Please take it onto the list of customer enhancement suggestions for the future to support 32bit input &...
Hello, Il use « Track & Stack » function for Neos or Comets. Generally, I create three tracked & stacked sets of n images each. When saving and re- loading...
When you open a saved image, do you re-do the astrometric solution? When you save an image, the basic info used in the astrometric solution is saved in the...
Because the WCS information is not the full astrometric solution that you need for the most precise astrometry. Juan On Thu, Dec 4, 2008 at 8:36 PM, Pierre...
... But in the stacked image, the stars are already trailed by the motion vector of the asteroid or comet, so any astrometric solution would be of far lower...
Maybe I remember wrong, but I've read somewhere (maybe in this m-l) that if you re-do the astrometric solution in an already saved stack there something...
Yes, Luca, the time stamped in the header are the mid time, not the initial expose time. Greetings, Juan A.Henríquez J51 http://atlante.org.es 2008/12/3 Luca...
That's been my experience too. The geometric distortion is not saved. However I don't think this is an inherent feature of the FITS header data format. I...
... Everything can bes aved in the FITS header, as anyone can add his or her own keywords. So one may add keywords to store high order plate constants, as has...
Roger, congratulations on getting your MPC Observatory Code. Hope my humble software will be a useful tool for the many observations that lie ahead for you!...
wow a 2 degree FOV! no wonder you see so much more. May I ask, what your imaging scale is, typical seeing, how long your exposures usually run? Is your field...
Hi All, When imaging at ~1m fl and 7um pixels I find that a 'guessed' center coordinate does not allow astrometrica to find a match. I have to manipulate by...
... You need to change the setting for the +/-pointing. The search radius comes into play only after the software has found the correltaion between the stars...
Hi Herbert, Thank you for the info. What is a good number for the pointing? I find that my center coordinates for an image can be off by 15arcmin. So I use...
... If you can specify the center coordinates to +/- 5 arc minutes, use this value for the pointing accuracy. ... The pointing has only very little impact on...
Hi Herbert, ... .. ... ... Right, but I use the added images. If I take 10 images with 16bit resolution and create the sum then the result is more than 16bit ...
Gert, Although the CCD cameras record to 16-bit resolution (65536 levels for each pixel) there are several sources of noise which degrade precision when taking...
... I'd like some clarification on this, I don't think that adding digitized images would improve the resolution. Regards Juan Lacruz ... -- Eppur si muove ......
Jaun It doesn't improve the resolution. It reduces random noise by a factor of sqrt(N) where the N is the number of images added or stacked (within some...
Jaun Actually more correctly, the nonrandom portion (the star) of the image adds by a factor of N while the random noise) portion of the image adds by a...
... Strictly speaking, you're slightly better off by adding the images as 32 bit images than by leaving them as 16 bit images and averaging, but in practice...
Herbert, I recently switched from a CCD with a 4:3 size ratio to a new one with a 3:2 ratio. I notice that when Astrometrica opens images from the new camera,...
... There are no fixed window sizes in Astrometrica. Maybe you can put the image in some server for me to download (or ZIP it and send it to my e-mail address,...
I'm a new user and I've been learning the program using known objects. I've muddled through various issues due to learning curve, but I think this one is not...
... The software probably does not hang, but it's probably busy trying to figure out any moving objects. This may arise if you have many dubious detections in...
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