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Hello, I'm trying to make an interactive daofind routine and there is an error regarding the display device, can't copy and paste so i write down:apphot> daofind
Input image(s) (Fy080826.0046.fits):
Warning: Error opening graphics device
Warning: Graphics overlay not available for display devicein the epar daofind i see the graphics and display field and i activated "yes" on graphics... don't know really what happens. i was hoping to get de image and clock on the star i want to do photometry with.Thanks any help, the images are from the CTIO Yalo 1.0m telescope and the images are calibrated and "arimassed" with the setairmass task.Best regards,Santiago Roland.-

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Lic. Santiago Roland - Los Molinos Observatory - IAU Code 844 - Licensed Radio Amateur CX1DR - Montevideo, Uruguay

The 'graphics' and 'display' parameters are not toggles, they are the device names to be used (normally, they're the stdgraph/stdimage environment variables actually). If graphics already works for you, simply unlearn the task to reset the params. You can ignore the warning about the graphics overlay, it isn't related and was never implemented.-Mike

Thanks Mike, ok. Graphic and device are not toogles, what should say in both fields, say for a normall installation in Ubuntu Linux... i'm using ds9 to display images... that is specified in my login.cl?in "display" should i write stdimage?
what for "graphic" filed?how do i unlearn a task?Thanks, as you see i'm a newbie... but IRAF rocks!Thanks,Santiago Roland.-

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Lic. Santiago Roland - Los Molinos Observatory - IAU Code 844 - Licensed Radio Amateur CX1DR - Montevideo, Uruguay

To unlearn the task:[code:1:a1e5b22df3]cl> unlearn daofind[/code:1:a1e5b22df3]The 'stdgraph' and 'stdimage' environment variables are set in your login.cl file, for stdgraph this is normally 'xterm' or 'xgterm' depending on which graphics termina you are using (must be one of these two), for stdimage the default is a 512x512 frame buffer (imt512) but the GDEVICES command will print a list of available options.-Mike

In fact i'm trying to do photometry of TNO, so i know the position of the object and i want to use only a few tenths of stars as reference and then make the extinction correction and stuff. The thing is that daofind (i already make it run, thanks to your replies), generates a file with thousands of stars (the CTIO camera is like 20x20 arcminutes and the 1-meter telescope are 4 minutes of exposure)... but i want to input manually with de mouse the asteroid position and the reference stars.... i toggled the interactive field to "yes" and it prompts the image with the blinking cursor and when I press "spacebar" in order to indicate the desired object, it starts to detect stars automatically... may be is not spacebar the key i have to press to indicate de object... what i'm doing wrong? may be more than only one thing...Thanks again for the reply,Cheers,Santiago Roland.-

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Lic. Santiago Roland - Los Molinos Observatory - IAU Code 844 - Licensed Radio Amateur CX1DR - Montevideo, Uruguay

DAOFIND is meant to find the stars in the entire image, if you want to process only a subsection around the asteroid then you'll need to specify the section to the task (e.g. see example 5 of the help page), or else use a task like TSELECT to extract the positions from the table around your object to a smaller table.-Mike