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sky.py
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import numpy as np
import scipy
import pylab as plt
import os
from pyraf import iraf
class coords_trans:
def __init__(self,coords_name,filters,names):
self.filters=filters
self.coords_name=coords_name
self.names=names
def wcsxymatch(self):
iraf.wcsxymatch.xcolumn=2
iraf.wcsxymatch.ycolumn=3
iraf.wcsxymatch.coords=self.coords_name
iraf.verbose='no'
input_wcs=self.names[self.filters[0]]
ref_wcs=self.names[self.filters[0]]
iraf.delete('coords_wcs.dat')
output_wcs='coords_wcs.dat'
iraf.wcsxymatch(input=input_wcs,referenc=ref_wcs,output=output_wcs)
id_coords=scipy.genfromtxt(self.coords_name,usecols=0,dtype='S')
x_wcs=np.round(scipy.genfromtxt(output_wcs,usecols=0).astype(float))
y_wcs=np.round(scipy.genfromtxt(output_wcs,usecols=1).astype(float))
iraf.delete('coords_wcs.dat')
np.savetxt(output_wcs,np.array(zip(id_coords,x_wcs,y_wcs),dtype=[('id_coords','S16'),('x_wcs',int),('y_wcs',int)]),fmt="%10s %10d %10d")
return output_wcs
class cut_image:
def __init__(self,coords,filters,box_size,names,box_opt,cur_dir,data_dir):
self.filters=filters
self.id_coor=coords[:,0]
self.x_coor=np.round(coords[:,1].astype(float)).astype(int)
self.y_coor=np.round(coords[:,2].astype(float)).astype(int)
self.box_opt=box_opt
if self.box_opt==1:
self.box_tmp=int(round(int(box_size)/2.))
if self.box_opt==2:
self.box_tmp_dic=box_size
self.names=names
self.suff='.fits'
self.data_dir=data_dir
self.cur_dir=cur_dir
def boxes(self):
for k in self.filters:
for i in np.arange(0,len(self.id_coor),1):
if self.box_opt==1:
self.box_size=self.box_tmp
if self.box_opt==2:
self.box_size=int(round(int(self.box_tmp_dic[k][:,1][self.box_tmp_dic[k][:,0]==self.id_coor[i]][0])/2.))
xmin=str(self.x_coor[i]-self.box_size)
ymin=str(self.y_coor[i]-self.box_size)
xmax=str(self.x_coor[i]+self.box_size)
ymax=str(self.y_coor[i]+self.box_size)
iraf.imcopy.verbose='no'
iraf.imcopy(self.names[k]+self.suff+'['+xmin+':'+xmax+','+ymin+':'+ymax+']',self.names[k]+'_'+self.id_coor[i]+self.suff)
os.system('mv '+self.names[k]+'_'+self.id_coor[i]+self.suff+' '+self.data_dir)
def median_sky(self):
sky_dic={}
for k in self.filters:
sky_file=open('sky_'+k+'.dat','w')
sky_file.write('#ID\t bg\t rms\n')
id_sky=np.array([])
sky_array=np.array([])
sky_rms_array=np.array([])
for i in np.arange(0,len(self.id_coor),1):
if self.box_opt==1:
self.box_size=self.box_tmp
if self.box_opt==2:
self.box_size=int(round(int(self.box_tmp_dic[k][:,1][self.box_tmp_dic[k][:,0]==self.id_coor[i]][0])/2.))
iraf.imstat.fields='midpt'
sky=np.array([])
sky_box=int(round(self.box_size*0.1))
edge2=int(round(self.box_size+1-sky_box))
edge3=int(self.box_size+1)
box1='[1:'+str(sky_box)+',1:'+str(self.box_size*2)+']'
box2='[1:'+str(self.box_size*2)+',1:'+str(sky_box)+']'
box3='['+str(self.box_size*2-sky_box)+':'+str(self.box_size*2)+',1:'+str(self.box_size*2)+']'
box4='[1:'+str(self.box_size*2)+','+str(self.box_size*2-sky_box)+':'+str(self.box_size*2)+']'
sky_1=iraf.imstat(self.data_dir+'/'+self.names[k]+'_'+self.id_coor[i]+self.suff+box1,Stdout=1)
sky_2=iraf.imstat(self.data_dir+'/'+self.names[k]+'_'+self.id_coor[i]+self.suff+box2,Stdout=1)
sky_3=iraf.imstat(self.data_dir+'/'+self.names[k]+'_'+self.id_coor[i]+self.suff+box3,Stdout=1)
sky_4=iraf.imstat(self.data_dir+'/'+self.names[k]+'_'+self.id_coor[i]+self.suff+box4,Stdout=1)
iraf.imstat.fields='stddev'
sky_stddev=np.array([])
sky_1_stddev=iraf.imstat(self.data_dir+'/'+self.names[k]+'_'+self.id_coor[i]+self.suff+box1,Stdout=1)
sky_2_stddev=iraf.imstat(self.data_dir+'/'+self.names[k]+'_'+self.id_coor[i]+self.suff+box2,Stdout=1)
sky_3_stddev=iraf.imstat(self.data_dir+'/'+self.names[k]+'_'+self.id_coor[i]+self.suff+box3,Stdout=1)
sky_4_stddev=iraf.imstat(self.data_dir+'/'+self.names[k]+'_'+self.id_coor[i]+self.suff+box4,Stdout=1)
sky=np.append(sky,float(sky_1[1]))
sky=np.append(sky,float(sky_2[1]))
sky=np.append(sky,float(sky_3[1]))
sky=np.append(sky,float(sky_4[1]))
sky_stddev=np.append(sky_stddev,float(sky_1_stddev[1]))
sky_stddev=np.append(sky_stddev,float(sky_2_stddev[1]))
sky_stddev=np.append(sky_stddev,float(sky_3_stddev[1]))
sky_stddev=np.append(sky_stddev,float(sky_4_stddev[1]))
sky_file.write(self.id_coor[i])
sky_file.write('\t')
sky_file.write(str(np.min(sky)))
sky_file.write('\t')
sky_file.write(str(np.min(sky_stddev)))
sky_file.write('\n')
id_sky=np.append(id_sky,self.id_coor[i])
sky_array=np.append(sky_array,np.min(sky))
sky_rms_array=np.append(sky_rms_array,np.min(sky_stddev))
sky_dic[k]=np.array([id_sky,sky_array,sky_rms_array]).T
if len(id_sky)==1:
sky_dic[k]=np.array([id_sky,sky_array,sky_rms_array])
sky_file.close()
return sky_dic
def instat(self):
iraf.task(instat="instat.cl")
instat_dic={}
for k in self.filters:
instat_file=open('sky_'+k+'.dat','w')
instat_file.write('#ID\t bg\t rms\n')
id_instat=np.array([])
bg_instat_array=np.array([])
rms_instat_array=np.array([])
for i in np.arange(0,len(self.id_coor),1):
iraf.instat.verbose='no'
iraf.instat(self.data_dir+'/'+self.names[k]+'_'+self.id_coor[i]+self.suff)
bg=iraf.instat.bgvalue
rms=iraf.instat.rmsvalue
instat_file.write(self.id_coor[i])
instat_file.write('\t')
instat_file.write(str(bg))
instat_file.write('\t')
instat_file.write(str(rms))
instat_file.write('\n')
id_instat=np.append(id_instat,self.id_coor[i])
bg_instat_array=np.append(bg_instat_array,bg)
rms_instat_array=np.append(rms_instat_array,rms)
instat_dic[k]=np.array([id_instat,bg_instat_array,rms_instat_array]).T
instat_file.close()
return instat_dic
class substract_sky:
def __init__(self,sky_dic,box_size,names,box_opt,data_dir):
self.sky_dic=sky_dic
self.box_opt=box_opt
if self.box_opt==1:
self.box_tmp=str(int(box_size)+1)
if self.box_opt==2:
self.box_tmp_dic=box_size
self.names=names
self.suff='.fits'
self.data_dir=data_dir
def read_sky(self):
for k in self.sky_dic.keys():
if self.box_opt==1:
self.sky_box=self.box_tmp
if self.box_opt==2:
self.sky_box=str(int(self.box_tmp_dic[k][:,1][self.box_tmp_dic[k][:,0]==i][0])+1)
if np.size(self.sky_dic[k])<=3:
i=self.sky_dic[k][0][0]
sky_value=self.sky_dic[k][1][0]
iraf.imexpr.dims=self.sky_box+','+self.sky_box
iraf.imexpr.verbose='no'
iraf.imexpr('a-b',self.data_dir+'/'+self.names[k]+'_'+i+'_sky_sub'+self.suff,self.data_dir+'/'+self.names[k]+'_'+i+self.suff,sky_value)
else:
for i in self.sky_dic[k][:,0]:
sky_value=self.sky_dic[k][:,1][self.sky_dic[k][:,0]==i][0]
iraf.imexpr.dims=self.sky_box+','+self.sky_box
iraf.imexpr.verbose='no'
iraf.imexpr('a-b',self.data_dir+'/'+self.names[k]+'_'+i+'_sky_sub'+self.suff,self.data_dir+'/'+self.names[k]+'_'+i+self.suff,sky_value)