March 2000 anneal report for program 8410.

There was an anneal of the CCD on March 8th, 2000, 25 days after the 
previous anneal on February 12 2000.  A homogeneous set of data was obtained
from proposal 8410:  The Continuing Monthly Anneal Monitor.

For the most part, previous trends continue. The rate of hot pixel
growth, was within the average of previous months. There were no 10 e/s
level pixels created during this period, which reduced the number of those
pixels after the annealing to values close to those of October 1999.
In general the number of hot pixels is still increasing.


1) The number of post anneal hot pixels continue increasing consistent
   with the previously determined long term trends.

   > 0.1 e/s: 14249 pixels on March 8
   > 1.0 e/s:  2890
   > 10. e/s:   287

   > 0.1 e/s: 14028 pixels on February 12
   > 1.0 e/s:  2861
   > 10. e/s:   304

   > 0.1 e/s: 13722 pixels on January 11
   > 1.0 e/s:  2842
   > 10. e/s:   318


2) The *raw* post-anneal dark countrate for this anneal is 0.0220 cts/pixel.
   This compares with 0.0226 cts/pixel in February, and 0.0165 cts/pixel in
   March 99. Although this month values are lower than the previous month
   there is not considerable reduction in the raw post-anneal dark count rate.
   
3) The iterated median count rate (after iterating up to 30 times by
   eliminating pixels +/- 5*sigma) is 0.00422.
   
4) The creation rates for hot pixels over this period were within the normal
   range, except for pixels with 10e/s, which remained the same since the 
   last anneal.
   
   > 0.1 e/s:  39.9 pixels/day in March 2000 
   > 1.0 e/s:   3.0
   > 10  e/s:   0.0

   > 0.1 e/s:  39.1 pixels/day in February 2000 
   > 1.0 e/s:   4.5
   > 10  e/s:   0.2

   > 0.1 e/s:  32.2 pixels/day in January 2000 (between Oct 99 and Jan 00)
   > 1.0 e/s:   7.4
   > 10  e/s:   1.2

   > 0.1 e/s:  52.4 pixels/day in February 98
   > 1.0 e/s:   6.1
   > 10  e/s:   0.5

5) The rate at which new hot pixels annealed out was within the normal 
   range of fluctuations.

   > 0.1 e/s: 76.9% annealed away in the March 00 anneal.
   > 1.0 e/s: 62.3%
   > 10  e/s: ---%

   > 0.1 e/s: 74.8% annealed away in the February 00 anneal.
   > 1.0 e/s: 86.4%
   > 10  e/s: 300.%

   > 0.1 e/s: 60.0% annealed away in the January 00 anneal.
   > 1.0 e/s: 57.7%
   > 10  e/s: 43.0%

   > 0.1 e/s: 58.5% annealed away in the October 99 anneal.
   > 1.0 e/s: 39.0
   > 10  e/s:-37.5%
   
   The usual plots are attached.