file: fluffium_N9996.txt

5/25,26/04 -dd

Make a "tweak" to the N9997 fluffium model to include
Alexey's 4/20/04 "Spatial structure in the ACIS OBF
contamination" memo information.

Specifically, he points out that the "Herman's edges"
I am using are valid for S-array CHIPY = 177 and
at that location at that reference time (2002.82)
the tau_L should be 0.564 .

So, I'll take the present fluffium at 2002.82 and
scale it to get the desired tau_L...

I will also adjust the weighting of the new
acis_contam_abs_v5.tbl file so that at 2002.82
the four columns/components are to be taken
EACH with weight 1.0; hence this file can serve
as the tau_L = 0.564 reference all by itself.

----------------

Use the same fluffium shape we had in N9997:

*** Fluffium to use:
*
*   acis_contam_fluf15thkMOD.tbl
*
***

IDL>  readcol, 'acis_contam_fluf15thkMOD.tbl', fwav, f15mod
IDL> plot, fwav, f15mod, yrange=[0.8,1.03],/ysty,xrange=[0.,65.0],/xsty,linestyle=1

------------------

Now continue as in N9998 and N9997 creation process - summarized here:

  Read in this Fluffium file as well as Herman's original "abs"
file and write out a new version which has an extra
Fluffium column and is normalized for 1.0 weight
for all columns and has tau_L - 0.564 - these steps were
done in IDL as documented in:

    contam_add_fluffium.040525.pro

Manually pre-pend header info to the IDL-written file
and now we have the new file:

   acis_contam_abs_v5.tbl

    * Note version 5 is being used to match the version 5
    * that will be created for the time dependance...

Which looks like:

# Created by DD on 5/25/04
#
# file: acis_contam_abs_v5.tbl
#
#  This file was created by adding a Fluffium column
# to the existing "edge" file
#     acis_contam_abs_v1.tbl .
#
#  The Fluffium transmission  was taken from the file:
#     acis_contam_fluf15thkMOD.tbl  and converted to optical depths.
#
#  The depths given here are for time = 2002.82 and S-array CHIPY = 177
#  and have been modified so that at this time each component has
#  relative thickness of 1.000 .
#
#  tau_L for this file is 0.564 .
#
#  See also: fluffium_N9996.txt and contam_add_fluffium.040525.pro .
#
#                 Optical depths due to each component
#
#    wavelength      C-K          O-K          F-K      Fluffium
      1.01250      0.00000      0.00000      0.00000  1.48600e-05
      1.03750      0.00000      0.00000      0.00000  1.48600e-05
 ...
      16.9875     0.217545    0.0510126    0.0665882     0.161041
      17.0125     0.218419    0.0512011    0.0672259     0.161245
 ...
      56.3125     0.163164    0.0539854    0.0640996     0.156160
      56.3375     0.163348    0.0540539    0.0641677     0.156276



--------------------------------------
OK, now the time dependance....  We'll create a new file:

  acis_contam_tau_t_v5.tbl

which will have the 2002.82 line read:

 2002.820  1.000  1.000  1.0000  1.0000

and which will be scaled from these values by Alexey's
tau_L of time for the location : S-array, CHIPY=177.

So do that in IDL in contam_add_fluffium.pro and write out the
new file:

  acis_contam_tau_t_v5.tbl

and add header info to this IDL-created file... et voila.

Send the 'v5 "S-array, CHIPY=177" files to Dave H.

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