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Image name: Diffuser_specks.png (click image to enlarge)
Image size: 609.683 KB (1024x735)
Date submitted: 23-Feb-1994
SPECKS ON SXT DIFFUSER IMAGE This image was assembled from full resolution FFIs taken on 8 and 21-Feb-94 in compressed and low-8 mode with DPE=4. The restored FFIs when pasted together show the CCD from line 287 to the top of the CCD. The assembled image was smoothed with BIG_SMOOTH.PRO using a width of 25 and subtracted from the original image and them displayed with tvscl,diff>-25<5 to yield this image. As dark subtraction was not done the column blems remain as do the CCD manufacturing artifacts. The pattern of the x-ray damage at the limbs from the various long term pointings of the SXT are clearly revealed in this image. X-ray damage from some flares also show up on the disk in this display. The tiny specks are the new feature. They are roughly 20 DN deep on a signal level of roughly 800 DN. Their distribution is inconsistent with either proton damage or x-ray damage from intense flare kernels. They do not match the location of dark spikes. What are they???? LWA 2/23/94
