Re: isis-1.0.8 is available

From: Craig Heinke <cheinke_at_email.domain.hidden>
Date: Fri, 26 Apr 2002 18:46:03 -0400
Hello,
   I am attempting to use the ISIS function "add_atable_model", and am having 
difficulty altering the normalization of the additive table model with either 
the renorm_counts command or fit_counts.  I am also using the pileup model; 
here is what I've been doing:

import("xspec");
set_kernel(1,"pileup"); 
()= load_data("X5_205bin_grp_noecl.pi");
add_atable_model("NS_H_14.38.fits", "NS", ["T", "z","norm"]);
fit_fun("phabs(1) * NS(1)");
list_par;
phabs(1) * NS(1)
 idx  param           tie-to  freeze         value          min          max
  1  phabs(1).nH          0     0         0.5142989            0         1000
  2  NS(1).T              0     0          5.924939          5.9          6.3
  3  NS(1).z              0     0         0.8267264            0            1
  4  NS(1).norm           0     0             2e-07            0          0.1
  5  pileup<1>.nregions   0     1                 1            1           10
  6  pileup<1>.g0         0     1                 1            0            1
  7  pileup<1>.alpha      0     0         0.1202999            0            1
  8  pileup<1>.psffrac    0     1              0.95            0            1
()=fit_counts;        
 Parameters[Variable] = 8[5]
            Data bins = 36
           Chi-square = 774.9
   Reduced chi-square = 25

Overplotting the model shows that the normalization is far too high, yet using 
this model in XSPEC gives normalizations around 3e-3.  There are no problems 
using a blackbody model in place of the NS model.  I will send the additive 
table model I'm using (and data) to anyone who wants to check this problem.
  Thanks,
Craig Heinke


----
You received this message because you are
subscribed to the isis-users list.
To unsubscribe, send a message to
isis-users-request_at_email.domain.hiddenwith the first line of the message as:
unsubscribe
Received on Fri Apr 26 2002 - 18:46:09 EDT

This archive was generated by hypermail 2.2.0 : Tue Nov 13 2012 - 08:45:39 EST