SYSTEM: V2.9-V2.10.2
NUMBER: 213 MODULE: images.imcombine ccdred.combine SYSTEM: V2.9-V2.10.2 DATE: Mon May 10 14:57:05 MST 1993 FROM: valdes BUG: When using a median combining operation, no rejection or with mclip=no, and outputing a sigma image, the sigma image is incorrect. This is due to the median computation destroying some of the input data values before the sigma is computed. The workaround when both output median and sigma images are desired is to used one the rejection options with mclip=yes. By choosing the rejection option sigclip with low and high sigma thresholds of 1000 no pixels will be rejected and the results are the same as not specifying a rejection algorithm. STATUS: Fixed in V2.10.3.