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| china_108 |
01/04/2009 01:14PM (Read 1565 times)
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Status: offline
Registered: 09/24/2008
Posts: 25
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I use iraf apphot package phot task to manually locate the star(by pressing space bar) I want. The coordinates of my target are, say, x=400, y=300 but when I pressed space bar on the star I want, it located the star next to it, which is a brighter one.
This problem happened before, but then when I zoom in the image, it worked. However, this time even if I zoom in to 32(ds9), it still doesn't work.
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| fitz |
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01/04/2009 01:14PM
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Status: offline
Registered: 09/30/2005
Posts: 4040
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How far away is the second star? It sounds like it might be a problem in the setting of the centering box, i.e. the centerpars.cbox parameter is too big or the datapars.scale parameter is >1 meaning the effective box is larger than you think and the brighter star is being found.-Mike
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iraf cannot locate the star I want
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