setdefect is an interactive program for defining the position of CCD defects, useful for positioning objects in rtplot. Three types of defects are supported: pixel, line and hot pixel defects. You locate these by clicking with a cursor. For the first two, you will be asked to specify whether a defect is 'moderate' or 'disastrous' -- what you decide here is entirely up to you, but I assume that a 'moderate' defect is one you would prefer to avoid if possible, while a 'disastrous' defect is one to be avoided at all costs. In the case of hot pixels you should take a dark frame and divide through by its exposure time so that the pixels give counts/second. You must click on the precise pixel and then its value will be stored as an indication of severity.
setdefect [device] data newfile defect nccd xleft xright ylow yhigh iset (ilow ihigh)/(plow phigh)
| device | --- | The image display device. |
| data | --- | Ultracam data file. |
| newfile | --- | flag to indicate that the aperture file is new. |
| defect | --- | Defect file (new or old). |
| nccd | --- | The number of the CCD to set apertures over. |
| xleft xright | --- | X range to plot |
| ylow yhigh | --- | Y range to plot |
| iset | --- | How to set intensity: 'a' for automatic, min to max, 'd' for direct input of range, 'p' for percentiles, probably the most useful option. |
| ilow ihigh | --- | the intensity range is i1 to i2 if iset='d' |
| plow phigh | --- | p1 to p2 are percentiles to set the intensity if iset='p' |
| D | --- | Delete a defect. Place the cursor near to the defect you want to remove and then hit 'D'. |
| L | --- | Adds a new line defect starting at the cursor position. You will be prompted to indicate the other end of the line too. |
| F | --- | Display the full frame. |
| I | --- | Zooms in by a factor 2 around the cursor position. |
| O | --- | Zooms out by a factor 2 around the cursor position. |
| P | --- | Adds a new pixel defect at the cursor position. |
| Q | --- | Quit the program. |
| S | --- | Shows the value of pixel corresponding to the cursor position (no graphics scaling -- it gives you the true value) |
| W | --- | Define a window with the cursor which will then be displayed |
This command is a member of the class: Programs.
Author: T.R. Marsh
Created: 02 August 2002