Re: script AstroImageJ
Posted by
karenacollins on
Sep 05, 2012; 4:16am
URL: http://astroimagej.170.s1.nabble.com/script-AstroImageJ-tp6p9.html
Sam,
Thank you for the detailed input. We will consider it as one of
our key feature requirements when designing a scripting interface
for AIJ. We also appreciate your kinds words regarding AIJ, and are
very glad to hear it is useful to your white dwarf research group.
Karen
On 9/4/2012 4:26 PM, sharrold [via
AstroImageJ] wrote:
Hi Karen,
Thanks for the fast response! Yes, that is correct.
We use Maestro to:
- align all images in the observing sequence (thousands of
contiguous frames, spanning several hours)
- find all stars common to all frames, identify a star manually if
not detected automatically
- calculate the gain, dark current, and readout noise from the
calibration frames
- extract photometry using several fixed apertures
- select the best fixed aperture for the target star and each
comparison star over image sequence from those with the highest
calculated photometric SNR (usually slightly less than 1 FWHM of
the star averaged over the entire image sequence)
- make a light curve, relative flux vs times
We use WQED to:
- divide the relative flux of the target star by the comparison
stars
- select portions of the data to discard (due to clouds, observer
error, etc)
- divide by a low-order polynomial to correct for differential
atmospheric extinction
- apply Barycentric time corrections
We analyze the subsequent light curve using Period04.
I suppose some of the above may be best scripted by the user using
macros that can be called from the command line. Other parts are
probably best handled by AstroImageJ directly.
Thank you so much for making this useful tool! AstroImageJ will do
a lot for our white dwarf research group because it is extremely
versatile, and it is truly cross-platform.
Thank you!
Sam