## NS Magnetic Atmosphere Model
This model was updated on 4/3/14 to make a small correction to the fitted normalization.
The NSMAXG model interpolates from a grid of neutron star (NS) atmosphere
spectra to produce a final spectrum that depends on the parameters listed
below.
Atmosphere spectra are obtained using the latest equation of state and
opacity results for a partially ionized, strongly magnetized hydrogen
or mid-
Two sets of models are given: one set with a single surface T_{eff} [some models allow for varying g, in the
range log g (cm s^{-2}) = 13.6-15.4]
and a set which is constructed with
and BT_{eff} varying across the surface according to the
magnetic dipole model (θ_{m} is the
angle between the direction to the observer and the magnetic axis).
Effective temperatures span the range log
T_{eff} (K) ≈ 5.5-6.7.
Models with single (,BT_{eff}) cover the
energy range 0.05-10 keV, while models with
(,BT_{eff})-distributions cover the range
0.09-5 keV.
See here
for a list of models.
(Note that the spectral tables can easily be made compatible with other
XSPEC NS fitting models.)
The model parameters are :
xset NSMAXG_DIR directory-path should
be used to define the directory containing the model data files.
Please send your comments/questions to Wynn Ho
(wynnho@slac.stanford.edu).
If you publish results obtained using NSMAXG, please reference Ho, W.C.G., Potekhin, A.Y., & Chabrier, G. (2008, ApJS, 178, 102)
and also Mori, K. &
Ho, W.C.G. (2007, MNRAS, 377, 905) if using mid- HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public Last modified: Thursday, 03-Apr-2014 12:27:30 EDT |