Merge branch 'develop' into 'release_v2.0'

version 2.1.0

See merge request csst_sim/csst-simulation!16

ObservationSim/MockObject/CatalogBase.py

 import numpy as np
 import galsim
 import copy
+import cmath
 
 from astropy.table import Table
 from abc import abstractmethod, ABCMeta
@@ -73,6 +74,16 @@ class CatalogBase(metaclass=ABCMeta):
         }
         return param
 
+    @staticmethod
+    def rotate_ellipticity(e1, e2, rotation=0., unit='radians'):
+        if unit == 'degree':
+            rotation = np.radians(rotation)
+        e_total = np.sqrt(e1**2 + e2**2)
+        phi = cmath.phase(complex(e1, e2))
+        e1 = e_total * np.cos(phi + 2*rotation)
+        e2 = e_total * np.sin(phi + 2*rotation)
+        return e1, e2, e_total
+    
     @staticmethod
     def convert_sed(mag, sed, target_filt, norm_filt=None):
         bandpass = target_filt.bandpass_full

ObservationSim/MockObject/Galaxy.py

@@ -12,7 +12,7 @@ from ObservationSim.MockObject.MockObject import MockObject
 # import tracemalloc
 
 class Galaxy(MockObject):
-    def __init__(self, param, rotation=None, logger=None):
+    def __init__(self, param, logger=None):
         super().__init__(param, logger=logger)
         # self.thetaR = self.param["theta"]
         # self.bfrac = self.param["bfrac"]
@@ -27,8 +27,6 @@ class Galaxy(MockObject):
         # self.e1_bulge, self.e2_bulge = self.e_bulge.g1, self.e_bulge.g2
         # self.e1_total, self.e2_total = self.e_total.g1, self.e_total.g2
 
-        if rotation is not None:
-            self.rotateEllipticity(rotation)
         if not hasattr(self, "disk_sersic_idx"):
             self.disk_sersic_idx = 1.
         if not hasattr(self, "bulge_sersic_idx"):
@@ -51,6 +49,7 @@ class Galaxy(MockObject):
             full = integrate_sed_bandpass(sed=self.sed, bandpass=filt.bandpass_full)
         except Exception as e:
             print(e)
+            if self.logger:
                 self.logger.error(e)
             return -1
         for i in range(len(bandpass_list)):
@@ -59,6 +58,7 @@ class Galaxy(MockObject):
                 sub = integrate_sed_bandpass(sed=self.sed, bandpass=bandpass)
             except Exception as e:
                 print(e)
+                if self.logger:
                     self.logger.error(e)
                 return -1
             
@@ -78,12 +78,13 @@ class Galaxy(MockObject):
 
             gal = self.bfrac * bulge + (1.0 - self.bfrac) * disk
             gal = gal.withFlux(nphotons)
+            if fd_shear is not None:
+                g1 += fd_shear.g1
+                g2 += fd_shear.g2
             gal_shear = galsim.Shear(g1=g1, g2=g2)
             gal = gal.shear(gal_shear)
             gal = galsim.Convolve(psf, gal)
             
-            if fd_shear is not None:
-                gal = gal.shear(fd_shear)
             objs.append(gal)
         final = galsim.Sum(objs)
         return final
@@ -97,6 +98,7 @@ class Galaxy(MockObject):
             full = integrate_sed_bandpass(sed=self.sed, bandpass=filt.bandpass_full)
         except Exception as e:
             print(e)
+            if self.logger:
                 self.logger.error(e)
             return 2, None
 
@@ -131,6 +133,18 @@ class Galaxy(MockObject):
 
         real_wcs_local = self.real_wcs.local(self.real_pos)
 
+        disk = galsim.Sersic(n=self.disk_sersic_idx, half_light_radius=self.hlr_disk, flux=1.0, gsparams=gsp)
+        disk_shape = galsim.Shear(g1=self.e1_disk, g2=self.e2_disk)
+        disk = disk.shear(disk_shape)
+        bulge = galsim.Sersic(n=self.bulge_sersic_idx, half_light_radius=self.hlr_bulge, flux=1.0, gsparams=gsp)
+        bulge_shape = galsim.Shear(g1=self.e1_bulge, g2=self.e2_bulge)
+        bulge = bulge.shear(bulge_shape)
+        
+        if fd_shear:
+            g1 += fd_shear.g1
+            g2 += fd_shear.g2
+        gal_shear = galsim.Shear(g1=g1, g2=g2)
+
         for i in range(len(bandpass_list)):
             bandpass = bandpass_list[i]
 
@@ -138,6 +152,7 @@ class Galaxy(MockObject):
                 sub = integrate_sed_bandpass(sed=self.sed, bandpass=bandpass)
             except Exception as e:
                 print(e)
+                if self.logger:
                     self.logger.error(e)
                 # return False
                 continue
@@ -153,41 +168,24 @@ class Galaxy(MockObject):
             # print("nphotons_sub-band_%d = %.2f"%(i, nphotons))
 
             psf, pos_shear = psf_model.get_PSF(chip=chip, pos_img=pos_img, bandpass=bandpass, folding_threshold=folding_threshold)
-            disk = galsim.Sersic(n=self.disk_sersic_idx, half_light_radius=self.hlr_disk, flux=1.0, gsparams=gsp)
-            disk_shape = galsim.Shear(g1=self.e1_disk, g2=self.e2_disk)
-            disk = disk.shear(disk_shape)
-            bulge = galsim.Sersic(n=self.bulge_sersic_idx, half_light_radius=self.hlr_bulge, flux=1.0, gsparams=gsp)
-            bulge_shape = galsim.Shear(g1=self.e1_bulge, g2=self.e2_bulge)
-            bulge = bulge.shear(bulge_shape)
             
-            gal = self.bfrac * bulge + (1.0 - self.bfrac) * disk
+            gal_temp = self.bfrac * bulge + (1.0 - self.bfrac) * disk
+            gal_temp = gal_temp.shear(gal_shear)
+
+            gal_temp = gal_temp.withFlux(nphotons)
+            if not big_galaxy: # Not apply PSF for very big galaxy
+                gal_temp = galsim.Convolve(psf, gal_temp)
+            
+            if i == 0:
+                gal = gal_temp
+            else:
+                gal = gal + gal_temp
 
             # (TEST) Random knots
             # knots = galsim.RandomKnots(npoints=100, profile=disk)
             # kfrac = np.random.random()*(1.0 - self.bfrac)
             # gal = self.bfrac * bulge + (1.0 - self.bfrac - kfrac) * disk + kfrac * knots
 
-            gal = gal.withFlux(nphotons)
-            gal_shear = galsim.Shear(g1=g1, g2=g2)
-            gal = gal.shear(gal_shear)
-
-            if not big_galaxy: # Not apply PSF for very big galaxy
-                gal = galsim.Convolve(psf, gal)
-                if fd_shear is not None:
-                    gal = gal.shear(fd_shear)
-
-            # Use (explicit) stamps to draw
-            stamp = gal.drawImage(wcs=real_wcs_local, method='phot', offset=offset, save_photons=True)
-            
-            xmax = max(xmax, stamp.xmax - stamp.xmin)
-            ymax = max(ymax, stamp.ymax - stamp.ymin)
-
-            photons = stamp.photons
-            photons.x += x_nominal
-            photons.y += y_nominal
-            photons_list.append(photons)
-            del gal
-
         # # [C6 TEST]
         # print('xmax = %d, ymax = %d '%(xmax, ymax))
         # # Output memory usage
@@ -196,7 +194,12 @@ class Galaxy(MockObject):
         # for stat in top_stats[:10]:
         #     print(stat)
 
-        stamp = galsim.ImageF(int(xmax * 1.1), int(ymax * 1.1))
+        stamp = gal.drawImage(wcs=real_wcs_local, method='phot', offset=offset, save_photons=True)
+        photons = stamp.photons
+        photons.x += x_nominal
+        photons.y += y_nominal
+        photons_list.append(photons)
+
         stamp.wcs = real_wcs_local
         stamp.setCenter(x_nominal, y_nominal)
         bounds = stamp.bounds & galsim.BoundsI(0, chip.npix_x - 1, 0, chip.npix_y - 1)
@@ -226,6 +229,7 @@ class Galaxy(MockObject):
         else:
             # Return code 0: object photons missed this detector
             print("obj %s missed"%(self.id))
+            if self.logger:
                 self.logger.info("obj %s missed"%(self.id))
             return 0, pos_shear
         
@@ -297,14 +301,17 @@ class Galaxy(MockObject):
             # gal = self.bfrac * bulge + (1.0 - self.bfrac - kfrac) * disk + kfrac * knots
 
             gal = gal.withFlux(tel.pupil_area * exptime)
+            if fd_shear:
+                g1 += fd_shear.g1
+                g2 += fd_shear.g2
             gal_shear = galsim.Shear(g1=g1, g2=g2)
             gal = gal.shear(gal_shear)
             gal = galsim.Convolve(psf, gal)
 
             if not big_galaxy: # Not apply PSF for very big galaxy
                 gal = galsim.Convolve(psf, gal)
-                if fd_shear is not None:
-                    gal = gal.shear(fd_shear)
+                # if fd_shear is not None:
+                #     gal = gal.shear(fd_shear)
 
             starImg = gal.drawImage(wcs=real_wcs_local, offset=offset)
 
@@ -397,14 +404,6 @@ class Galaxy(MockObject):
         final = galsim.Convolve(psf, gal)
         return final
 
-    def rotateEllipticity(self, rotation):
-        if rotation == 1:
-            self.e1_disk, self.e2_disk, self.e1_bulge, self.e2_bulge, self.e1_total, self.e2_total = -self.e2_disk, self.e1_disk, -self.e2_bulge, self.e1_bulge, -self.e2_total, self.e1_total
-        if rotation == 2:
-            self.e1_disk, self.e2_disk, self.e1_bulge, self.e2_bulge, self.e1_total, self.e2_total = -self.e1_disk, -self.e2_disk, -self.e1_bulge, -self.e2_bulge, -self.e1_total, -self.e2_total
-        if rotation == 3:
-            self.e1_disk, self.e2_disk, self.e1_bulge, self.e2_bulge, self.e1_total, self.e2_total = self.e2_disk, -self.e1_disk, self.e2_bulge, -self.e1_bulge, self.e2_total, -self.e1_total
-
     def drawObject(self, img, final, noise_level=0.0, flux=None, filt=None, tel=None, exptime=150.):
         """ Override the method in parent class 
         Need to constrain the size of image stamp for extended objects

ObservationSim/MockObject/MockObject.py

@@ -32,6 +32,7 @@ class MockObject(object):
 
         # Place holder for outputs
         self.additional_output_str = ""
+        
         self.fd_shear = None
 
         self.logger = logger
@@ -61,7 +62,7 @@ class MockObject(object):
         dec = self.param["dec"]
         return galsim.CelestialCoord(ra=ra * galsim.degrees, dec=dec * galsim.degrees)
 
-    def getPosImg_Offset_WCS(self, img, fdmodel=None, chip=None, verbose=True, img_header=None):
+    def getPosImg_Offset_WCS(self, img, fdmodel=None, chip=None, verbose=True, chip_wcs=None, img_header=None):
         self.posImg = img.wcs.toImage(self.getPosWorld())
         self.localWCS = img.wcs.local(self.posImg)
         if (fdmodel is not None) and (chip is not None):
@@ -80,7 +81,9 @@ class MockObject(object):
         dy = y - self.y_nominal
         self.offset = galsim.PositionD(dx, dy)
         
-        if img_header is not None:
+        if chip_wcs is not None:
+            self.real_wcs = chip_wcs
+        elif img_header is not None:
             self.real_wcs = galsim.FitsWCS(header=img_header)
         else:
             self.real_wcs = None
@@ -132,6 +135,7 @@ class MockObject(object):
             full = integrate_sed_bandpass(sed=self.sed, bandpass=filt.bandpass_full)
         except Exception as e:
             print(e)
+            if self.logger:
                 self.logger.error(e)
             return 2, None
 
@@ -164,6 +168,7 @@ class MockObject(object):
                 sub = integrate_sed_bandpass(sed=self.sed, bandpass=bandpass)
             except Exception as e:
                 print(e)
+                if self.logger:
                     self.logger.error(e)
                 # return False
                 continue
@@ -214,6 +219,7 @@ class MockObject(object):
         else:
             # Return code 0: object photons missed this detector
             print("obj %s missed"%(self.id))
+            if self.logger:
                 self.logger.info("obj %s missed"%(self.id))
             return 0, pos_shear
 

ObservationSim/MockObject/SpecDisperser/SpecDisperser.py

@@ -122,7 +122,7 @@ class SpecDisperser(object):
                                                                  beam=beam)
 
         ### Account for pixel centering of the trace
-        yfrac_beam = ytrace_beam - floor(ytrace_beam)
+        yfrac_beam = ytrace_beam - floor(ytrace_beam+0.5)
 
         ysens = lam_beam * 0
         lam_index = argsort(lam_beam)
@@ -155,7 +155,7 @@ class SpecDisperser(object):
         sensitivity_beam = ysens
 
         len_spec_x = len(dx)
-        len_spec_y = int(ceil(yfrac_beam[-1]) - floor(yfrac_beam[0]) + 1)
+        len_spec_y = int(ceil(ytrace_beam[-1]) - floor(ytrace_beam[0]) + 1)
 
         beam_sh = (self.img_sh[0] + len_spec_y, self.img_sh[1] + len_spec_x)
         modelf = zeros(product(beam_sh), dtype=float)
@@ -165,9 +165,15 @@ class SpecDisperser(object):
 
         dxpix = dx - dx[0] + x0[1]
 
-        dyc = cast[int](ytrace_beam)
+        dyc = cast[int](np.floor(ytrace_beam+0.5))
+
+        dypix = cast[int](np.floor(ytrace_beam - dyc[0] + x0[0] + 0.5))
+
+        frac_ids =  yfrac_beam<0
+
+        dypix[frac_ids] = dypix[frac_ids] - 1
+        yfrac_beam[frac_ids] = 1+yfrac_beam[frac_ids]
 
-        dypix = dyc - dyc[0] + x0[0]
         flat_index = idx[dypix, dxpix]
 
         nonz = sensitivity_beam != 0