next up previous contents
Next: Kerrbb Up: Additive Model Components Previous: Grad

grbm: gamma-ray burst continuum

A model for gamma-ray burst continuum spectra developed by D. Band, et. al., 1993 (ApJ 413, 281).

A(E)=

K(E/100.)^alpha_1 * exp(-E/E_c)                                                      E < (alpha_1-alpha_2)*E_c

K[(alpha_1-alpha_2)*E_c/100]^(alpha_1-alpha_2) *(E/100)^alpha_2* exp-(alpha_1-alpha_2)            E > (alpha_1 - alpha_2)*E_c

 

where E is in units of keV.

 

par1 =alpha_1

first power law index

par2 =alpha_2

second power law index

par3 =E_c

characteristic energy in keV

norm = K

normalization constant

 

next up previous contents
Next: Kerrbb Up: Additive Model Components Previous: Grad