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SBModels2.py
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SBModels2.py
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from imageSim import SBProfiles
from imageSim.pointSource import PixelizedModel as PM, GaussianModel as GM
from math import pi
def cnts2mag(cnts,zp):
from math import log10
return -2.5*log10(cnts) + zp
class SBModel:
def __init__(self,name,pars,convolve=0):
if 'amp' not in pars.keys() and 'logamp' not in pars.keys():
pars['amp'] = 1.
self.keys = pars.keys()
self.keys.sort()
if self.keys not in self._SBkeys:
import sys
print 'Not all (or too many) parameters were defined!',self.keys
sys.exit()
self._baseProfile.__init__(self)
self.vmap = {}
self.pars = pars
for key in self.keys:
try:
v = self.pars[key].value
self.vmap[key] = self.pars[key]
except:
self.__setattr__(key,self.pars[key])
self.setPars()
self.name = name
self.convolve = convolve
def __setattr__(self,key,value):
if key=='pa':
self.__dict__['pa'] = value
if value is not None:
self.__dict__['theta'] = value*pi/180.
elif key=='theta':
if value is not None:
self.__dict__['pa'] = value*180./pi
self.__dict__['theta'] = value
elif key=='logamp':
if value is not None:
self.__dict__['amp'] = 10**value
else:
self.__dict__[key] = value
def setPars(self):
for key in self.vmap:
self.__setattr__(key,self.vmap[key].value)
def setPars2(self,pars):
for key in pars.keys():
self.values[self.vmap[key]] = pars[key]
self.setValues()
class Sersic(SBModel,SBProfiles.Sersic):
_baseProfile = SBProfiles.Sersic
_SBkeys = [['amp','n','pa','q','re','x','y'],
['logamp','n','pa','q','re','x','y'],
['amp','n','q','re','theta','x','y'],
['logamp','n','q','re','theta','x','y']]
def __init__(self,name,pars,convolve=0):
SBModel.__init__(self,name,pars,convolve)
def getMag(self,amp,zp):
from scipy.special import gamma
from math import exp,pi
n = self.n
re = self.re
k = 2.*n-1./3+4./(405.*n)+46/(25515.*n**2)
cnts = (re**2)*amp*exp(k)*n*(k**(-2*n))*gamma(2*n)*2*pi
return cnts2mag(cnts,zp)
def Mag(self,zp):
return self.getMag(self.amp,zp)
def setPars2(self,pars):
for key in pars.keys():
self.__setattr__(key,self.pars[key].value)
#self.values[self.vmap[key]] = pars[key]
#self.setPars()
class Gauss(SBModel,SBProfiles.Gauss):
_baseProfile = SBProfiles.Gauss
_SBkeys = [['amp','pa','q','r0','sigma','x','y']]
def __init__(self,name,pars,convolve=0):
if 'r0' not in pars.keys():
pars['r0'] = None
SBModel.__init__(self,name,pars,convolve)
def getMag(self,amp,zp):
from math import exp,pi
if self.r0 is None:
cnts = amp/(2*pi*self.sigma**2)
else:
from scipy.special import erf
r0 = self.r0
s = self.sigma
r2pi = (2*pi)**0.5
cnts = amp*pi*s*(r2pi*r0*(1.+erf(r0/(s*2**0.5)))+2*s*exp(-0.5*r0**2/s**2))
return cnts2mag(cnts,zp)
def Mag(self,zp):
return self.getMag(self.amp,zp)
class Moffat(SBModel,SBProfiles.Moffat):
_baseProfile = SBProfiles.Moffat
_SBkeys = [['amp','fwhm','index','pa','q','x','y']]
def __init__(self,name,pars,convolve=0):
SBModel.__init__(self,name,pars,convolve)
def getMag(self,amp,zp):
from math import exp,pi
if self.r0 is None:
cnts = amp/(2*pi*self.sigma**2)
else:
from scipy.special import erf
r0 = self.r0
s = self.sigma
r2pi = (2*pi)**0.5
cnts = amp*pi*s*(r2pi*r0*(1.+erf(r0/(s*2**0.5)))+2*s*exp(-0.5*r0**2/s**2))
return cnts2mag(cnts,zp)
def Mag(self,zp):
return self.getMag(self.amp,zp)
class PointSource(PM,GM):
def __init__(self,name,model,pars):
if 'amp' not in pars.keys():
pars['amp'] = 1.
self.keys = pars.keys()
self.keys.sort()
if self.keys!=['amp','x','y']:
import sys
print 'Not all (or too many) parameters were defined!'
print self.keys
sys.exit()
if type(model)==type([]):
GM.__init__(self,model)
else:
PM.__init__(self,model)
self.vmap = {}
self.pars = pars
for key in self.keys:
try:
v = self.pars[key].value
self.vmap[key] = self.pars[key]
except:
self.__setattr__(key,self.pars[key])
self.setPars()
self.name = name
def __setattr__(self,key,value):
if key=='logamp':
if value is not None:
self.__dict__['amp'] = 10**value
else:
self.__dict__[key] = value
def setPars(self):
for key in self.vmap:
self.__setattr__(key,self.vmap[key].value)
def getMag(self,amp,zp):
return cnts2mag(amp,zp)
def Mag(self,zp):
return self.getMag(self.amp,zp)
def babah():
for key in var.keys():
self.values[key] = None
self.vmap[var[key]] = key
for key in const.keys():
self.values[key] = const[key]
if type(model)==type([]):
GM.__init__(self,model)
else:
PM.__init__(self,model)
self.ispix = True
self.setValues()
self.name = name
self.convolve = None
class BAHBA:
def __setattr__(self,key,value):
if key=='logamp':
if value is not None:
self.__dict__['amp'] = 10**value
else:
self.__dict__[key] = value
def pixeval(self,xc,yc,dummy1=None,dummy2=None,**kwargs):
if self.ispix==True:
return PM.pixeval(self,xc,yc)
else:
return GM.pixeval(self,xc,yc)
def setValues(self):
self.x = self.values['x']
self.y = self.values['y']
if 'amp' in self.keys:
self.amp = self.values['amp']
elif self.values['logamp'] is not None:
self.amp = 10**self.values['logamp']
def getMag(self,amp,zp):
return cnts2mag(amp,zp)
def Mag(self,zp):
return self.getMag(self.amp,zp)
def setPars(self,pars):
for key in self.vmap:
self.values[self.vmap[key]] = pars[key]
self.setValues()