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Topic Subject   Views   Replies   Last Post   HelpStarted by:Guest, 10/19/2005 12:56PM Dear Sir, I am able to make a composite image using the rgbsun in the color package. But the resulting image shows some vertical lines near the bright stars in the field. so i changed the z1,z2 values of the red,green,blue color to avoid it. Now the...   2632 0 By: Guest 10/19/2005 12:56PM imstatistics significant figuresStarted by:Guest, 10/20/2005 05:29AM Hello - The imstat results produce (e.g. for mean) four significant figures (e.g. 110.1 or 99.91). Is there an easy way to get 5 significant figures to appear (e.g. 110.17), perhaps an analog to imstatistics? thanks J. Caldwell McDonald Observatory ...   2685 0 By: Guest 10/20/2005 05:29AM A problem with astheditStarted by:Guest, 10/20/2005 04:18PM Dear Sir/Madam, I have been experiencing a problem using the IRAF task asthedit and I would be grateful for any feedback you have on a possible solution or work around. To begin with, I am using IRAF V2.12.2a on a pentium 4 computer running ubuntu lin...   2910 0 By: Guest 10/20/2005 04:18PM imstatistics significant figuresStarted by:Guest, 10/20/2005 09:22PM Hi John, By default the output is printed using a '%10.4g' format, but if you turn off the 'format' parameter to print the column headings a more general '%g' format is used and you'll see the extra precision. Otherwise, a code change is required to ...   2607 0 By: Guest 10/20/2005 09:22PM Question about spectra reductionStarted by:Guest, 10/21/2005 04:35PM Good morning, I am Paola Rodriguez Hidalgo, a graduate student from UF. I am experimenting problems when using the task "apall" to extract spectra from 2D images. Sometimes a weird "bump" shows up in the spectra. It happens sort of randomly, altho...   2561 0 By: Guest 10/21/2005 04:35PM imexamine errorStarted by:Guest, 10/25/2005 07:27PM Hello, When I try to run imexamine on an image already displayed in ds9, I get an error saying: can't read "ds9(canvas)":no such variable I am not sure why this happens and would appreciate some advise. thanks terry   2614 0 By: Guest 10/25/2005 07:27PM apall (V2.12.2) - sky subtractionStarted by:Guest, 10/26/2005 04:38PM I am facing problem with the background sky subtraction while extracting spectra using apall. I find that the night sky emission lines are not well subtracted. I am currently using V2.12.2. However, I did not face any such problem when I was using V...   2640 0 By: Guest 10/26/2005 04:38PM imexamine errorStarted by:Guest, 10/26/2005 05:48PM Hi Terry, The message is coming from DS9 itself and we have no other report of this, so you might also ask at saord@cfa.harvard.edu to see whether they know what's going on. It sounds as though there is some confusion about the display frame so you m...   2581 0 By: Guest 10/26/2005 05:48PM apall (V2.12.2) - sky subtractionStarted by:Guest, 10/28/2005 06:52AM I am facing problem with the background sky subtraction while extracting spectra using apall. I find that the night sky emission lines are not well subtracted. I am currently using V2.12.2. However, I did not face any such problem when I was using V...   2510 0 By: Guest 10/28/2005 06:52AM problem with the identify task in scriptStarted by:Guest, 10/28/2005 04:03PM Dear Sirs, I am writing some IRAF scripts involving the use of the task "identify". I would like to use the task interactively, as when it is launched from the command line. Everything works fine at the beginning: the task is launched and the graphica...   2709 0 By: Guest 10/28/2005 04:03PM software problemStarted by:Guest, 10/28/2005 06:21PM We are having a problem using the package msczero and we are not able to find the solution. When we start msczero, it loads our image, but when we try to do anything on the image (like pressing x), we get the message: the cursor is not in an image Do...   2576 0 By: Guest 10/28/2005 06:21PM xdimsum.makemask: duplicate keyword a...Started by:Guest, 11/02/2005 02:52PM A local user pointed out the following error which manifests itself when running "epar makemask" under PyRAF: SyntaxError: duplicate keyword argument (<CL script xdimsum.makemask>, line 176) The error message is from Python, which explains why ...   2700 0 By: Guest 11/02/2005 02:52PM IRAF Numerical precisionStarted by:Guest, 11/03/2005 06:00PM Dear Sir, I have been using IRAF for a while now and noticed that the output of photometric processing tasks, such as 'phot' for example, has a numerical precision of 3 decimal digits, i.e., an accuracy of 1e-3. Is there a way to increase this accurac...   3140 1 By: Guest 11/03/2005 06:00PM HelpStarted by:Guest, 11/03/2005 10:19PM Hello Venkat, I'm sorry for the delay in replying. The z1,z2 values are the intensity stretch parameters. There is no specific criteria for choosing the values. The same things apply to simple grey scale display that if one makes the faintest th...   2804 0 By: Guest 11/03/2005 10:19PM A problem with astheditStarted by:Guest, 11/03/2005 10:49PM Hello Dugan, The formating is causing a problem. The program is trying to figure out if the keyword value is a number or a string. It assumes a string starts in column 11 with a quote mark. Since this is not the case it is interpreting the va...   3951 0 By: Guest 11/03/2005 10:49PM Fwd: Soar Optical Imager mosaicingStarted by:Guest, 11/04/2005 05:40PM [b:c32047d51d]From: [/b:c32047d51d]Eduardo Cypriano <cypriano@ctiosz.ctio.noao.edu ([email]cypriano@ctiosz.ctio.noao.edu[/email])> [b:c32047d51d]Date: [/b:c32047d51d]November 4, 2005 10:17:27 AM MST [b:c32047d51d]To: [/b:c32047d51d]Frank Valdes &l...   3259 1 By: Guest 11/04/2005 05:40PM Fwd: Question about spectra reductionStarted by:Guest, 11/04/2005 07:07PM [b:2a97495062]From: [/b:2a97495062]Frank Valdes <valdes@noao.edu ([email]valdes@noao.edu[/email])> [b:2a97495062]Date: [/b:2a97495062]November 4, 2005 12:06:19 PM MST [b:2a97495062]To: [/b:2a97495062]Paola Rodriguez <paola@astro.ufl.edu ([email...   2670 0 By: Guest 11/04/2005 07:07PM apall (V2.12.2) - sky subtractionStarted by:Guest, 11/04/2005 07:24PM Hello Anupama, Thank you for including the data. I do not believe there were any significant changes between the two versions of IRAF for the aperture extraction. Unless you used exactly the same aperture definitions, that is the database/ap* f...   2693 0 By: Guest 11/04/2005 07:24PM problem with the identify task in scriptStarted by:Guest, 11/04/2005 07:35PM Hello Simone, This is a common "gotcha". The IDENTIFY task reads input from the cursor, from parameters, and from the standard input of the task. It is this last part, where it asks for such things as the wavelength, that causes problems with t...   2681 0 By: Guest 11/04/2005 07:35PM software problemStarted by:Guest, 11/04/2005 07:47PM Hello Claudia, The situation gets a little confused because of different versions of XImtool and DS9 that people use. The cursor readback depends on certain behaviors of the display servers. It is likely you are using DS9 which does not correct...   4092 4 By: fitz 11/04/2005 07:47PM xdimsum.makemask: duplicate keyword a...Started by:Guest, 11/04/2005 07:55PM Hello Sergio, Yes the duplicate use of zloreject at line 198 is an error. How it affects PyRAF and if that is the actual source of the error you would have to ask the developers of PyRAF (at help@stsci.edu). XDIMSUM was not developed with regar...   2774 0 By: Guest 11/04/2005 07:55PM Fwd: sine wave baseline removalStarted by:Guest, 11/04/2005 08:25PM [b:44e995dd1f]From: [/b:44e995dd1f]"Phil" <philbru@earthlink.net ([email]philbru@earthlink.net[/email])> [b:44e995dd1f]Date: [/b:44e995dd1f]November 2, 2005 12:15:13 PM MST [b:44e995dd1f]To: [/b:44e995dd1f]"Frank Valdes" <valdes@tucana.tuc.noao...   3018 0 By: Guest 11/04/2005 08:25PM mosaic2Started by:Guest, 11/04/2005 08:34PM Hola Liliana, Yes you may go ahead with the reductions without adding the cosmic rays to the bad pixel mask. It was not clear what your problem is with crplusbpmask.cl. Could you not download the script, could you not define the script, or when y...   2441 0 By: Guest 11/04/2005 08:34PM ellipticity and position angleStarted by:Guest, 11/07/2005 04:36PM I have a (long) list of x and y positions of stars in an image, and would very much like to know the ellipticity and position angles of the images: most are stars, but a few are spurious detections on defraction spikes. I know that imexamine's "a" ...   3149 1 By: 11/07/2005 04:36PM problems with GUIAPPSStarted by:Guest, 11/07/2005 08:14PM Hi; I have recently installed GUIAPPS on my Linux machine (64 bit dual Opteron processor, running Fedora Core 2), and I am having some difficulties with both xgphot and xguiphot (I need elliptical apertures, and those seem to be the tasks that allow ...   3547 2 By: 11/07/2005 08:14PM Problems in IrafStarted by:Guest, 11/09/2005 02:17AM Dear sir, Hope you still remember me.As usual, I have a few questions of iraf to ask. 1. After extracting the spectrum to 1-D the imagefile supposed had an extension of .ms, right? Now the problem is the imagefile still in 3-D format,because the header ...   2448 0 By: Guest 11/09/2005 02:17AM multiple columns for biasStarted by:Guest, 11/09/2005 01:37PM Dear IRAF crew, I have a question concerning the colbias command in the noao.bias package of IRAF. I am working with a telescope which uses columns 1-48 and 2096-2158 as overscan regions. The bias is found by the colbias command. I was wondering if ...   3002 1 By: 11/09/2005 01:37PM mscred/zerocombine problemStarted by:Guest, 11/10/2005 05:01PM Dear Iraf Gurus, I'm running into a problem in the mscred package. I'm trying to run the zerocombine task to stack a set of bias frames in MEF format, and am getting the error message: ERROR on line 46: parameter 'plfile' not found. First I tr...   2813 0 By: Guest 11/10/2005 05:01PM problem with DOECSLIT/ECREIDENTStarted by:Guest, 11/11/2005 12:03AM I find that when trying to extract echelle spectra with dispersion correction using arcs taken at periodic intervals during the night, the rms of the residuals to the comparison line fitting are much larger (~300 times for this case) for the arc after ...   2697 0 By: Guest 11/11/2005 12:03AM imexamine error (fwd)Started by:Guest, 11/12/2005 04:22AM ---------- Forwarded message ---------- Date: Sat, 29 Oct 2005 15:43:36 -0700 (PDT) To: Mike Fitzpatrick <fitz@tucana.tuc.noao.edu> Subject: Re: imexamine error Hi Mike, thanks for your reply. Here is exactly what I am doing: I open ds9 from a ...   2818 0 By: Guest 11/12/2005 04:22AM

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