Re: spectral lines shape using mkcflow xspec models

From: David P. Huenemoerder <dph_at_email.domain.hidden> Date: Wed, 30 Jul 2008 18:12:57 -0400 · This archive was generated by hypermail 2.2.0 : Wed Jul 30 2008 - 21:38:01 EDT

    juan> I'm using the mkcflow model to fit my data, the maximum
    juan> temperature is 20 keV. I wonder why the fitted lines looks
    juan> with flat top (see attached figure). The same happens in all
    juan> the lines.

Hi Juan,

Set the switch to 0:

  > set_par("mkcflow(1).switch", 0);

This will force the model to be calculated, rather than
interpolated. I suspect that the tabulated models have a very coarse
energy grid, a relic of the pre-grating days of X-ray astronomy.

-- Dave

David Huenemoerder  617-253-4283 (o); -253-8084 (f); http://space.mit.edu/home/dph
MIT Kavli Institute for Astrophysics and Space Research
70 Vassar St., NE80-6065,
Cambridge, MA  02139
[Admin. Asst.: Elaine Tirrell, 617-253-7480, egt_at_email.domain.hidden
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