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grbjet: Two-phase Comptonization model of soft thermal
seed photons for GRB prompt emission
This model computes the time-averaged flux over the signal duration determined by the radiation curvature effect for a single pulse emitted by a relativistic top-hat jet (Farinelli et al., 2021).
The parameters are :
| par1 | thobs, observer viewing angle (degrees) |
| par2 | thjet, jet half opening angle (degrees) |
| par3 | gamma, jet gamma Lorentz factor |
| par4 | r12, jet radius ( cm) |
| par5 | p1, low-energy index of the comoving frame broken powerlaw spectrum |
| par6 | p2, high-energy index of the comoving frame broken powerlaw spectrum |
| par7 | E0, break energy (keV) |
| par8 | delta, parameter dictating the smoothness of the transition between the two powerlaws |
| par9 | index_pl, energy index of the comoving-frame cutoff powerlaw spectrum |
| par10 | ecut, cut-off energy (keV) |
| par11 | ktbb, comoving frame blackbody temperature (keV) |
| par12 | model, flag to choose the comoving frame emissivity law. Allowed values are 1 (broken powerlaw), 2 (cutoff powerlaw) or 3 (blackbody) |
| par13 | redshift, source redshift |
| norm | comoving frame emissivity normalization in units of
 erg cm s keV ster |