def make_mock_image(self,
truex,
truey,
b,
fluxes,
nc,
cf,
noise,
two_star_mode=None):
mocks = []
if two_star_mode is not None:
mock0 = image_model_eval(truex, truey, fluxes[b],
self.truebacks[b], self.imsz, nc, cf)
else:
mock0 = image_model_eval(truex, truey, fluxes[b],
self.normal_backs[b], self.imsz, nc, cf)
mock0[mock0 < 1] = 1.
variance = mock0 / self.gain
print np.mean(variance), np.std(variance)
for n in xrange(self.n_realizations):
# here is where I would put an if statement like
# if two_star_mode == 'rx3':
# mock = mock0 + (np.sqrt(variance)*np.mean(noise[:,n]))
# i believe it would be the mean of the three since we already coadd the model image
# from which we calculate the variance.
mock = mock0 + (np.sqrt(variance) * noise[b, n])
mocks.append(mock)
return mocks
def make_srcmap(self, ifield, cat, flux_idx=-1, band=0, nbin=0., nx=1024, ny=1024, nwide=17, multfac=7.0, \
pcat_model_eval=False, libmmult=None, dx=2.5, dy=-1.0):
'''
This function takes in a catalog, finds the PSF for the specific ifield, makes a PSF template and then populates an image with
model sources. When we use galaxies for mocks we can do this because CIBER's angular resolution is large enough that galaxies are
well modeled as point sources.
Note (5/21/20): This function currently only places sources at integer locations, which should probably change
for any real implementation used in analysis.
Note (5/22/20): with the integration of PCAT's model evaluation routines, we can now do sub-pixel source placement
and it is a factor of 6 faster than the original implementation when at scale (e.g. catalog sources down to 25th magnitude)
dx and dy are offsets meant to be used when comparing PCAT's model evaluation with the original, but is not strictly
necessary for actual model evaluation. In other words, these can be set to zero when not doing comparisons.
'''
Nsrc = cat.shape[0]
srcmap = np.zeros((nx * 2, ny * 2))
Nlarge = nx + 30 + 30
if self.psf_template is None:
print('generating psf template because it was none')
self.get_psf(ifield=ifield,
band=band,
nx=nx,
ny=ny,
multfac=multfac,
poly_fit=pcat_model_eval,
nwide=nwide)
if pcat_model_eval:
srcmap = image_model_eval(
np.array(cat[:, 0]).astype(np.float32) + dx,
np.array(cat[:, 1]).astype(np.float32) - dy,
np.array(cat[:, flux_idx]).astype(np.float32),
0., (nx, ny),
35,
self.cf,
lib=self.libmmult.pcat_model_eval)
return srcmap
else:
xs = np.round(cat[:, 0]).astype(np.int32)
ys = np.round(cat[:, 1]).astype(np.int32)
for i in range(Nsrc):
srcmap[Nlarge / 2 + 2 + xs[i] - nwide:Nlarge / 2 + 2 + xs[i] +
nwide + 1,
Nlarge / 2 - 1 + ys[i] - nwide:Nlarge / 2 - 1 + ys[i] +
nwide + 1] += self.psf_template * cat[i, flux_idx]
return srcmap[nx / 2 + 30:3 * nx / 2 + 30,
ny / 2 + 30:3 * ny / 2 + 30]
array_2d_double = npct.ndpointer(dtype=np.float64,
ndim=2,
flags="C_CONTIGUOUS")
libmmult = npct.load_library('pcat-lion', '.')
libmmult.pcat_model_eval.restype = None
libmmult.pcat_model_eval.argtypes = [
c_int, c_int, c_int, c_int, c_int, array_2d_float, array_2d_float,
array_2d_float, array_1d_int, array_1d_int, array_2d_float, array_2d_float,
array_2d_float, array_2d_double, c_int, c_int, c_int, c_int
]
noise = np.random.normal(size=(imsz[1], imsz[0])).astype(np.float32)
mock = image_model_eval(np.concatenate([truex, xphon]),
np.concatenate([truey, yphon]),
np.concatenate([truef, fphon]),
trueback,
imsz,
nc,
cf,
lib=libmmult.pcat_model_eval)
mock[mock < 1] = 1. # maybe some negative pixels
variance = mock / gain
oldmock = mock.copy()
mock += (np.sqrt(variance) * np.random.normal(size=(imsz[1], imsz[0]))).astype(
np.float32)
diff = mock - oldmock
print np.sum(diff * diff / variance)
f = open('Data/mockL_pix.txt', 'w')
f.write('%1d\t%1d\t1\n0.\t%0.3f' % (imsz[0], imsz[1], gain))
f.close()
rhol = np.sqrt(nstar / float(max_x * max_y))
nx = np.ceil(max_x * rhol)
ny = np.ceil(max_y * rhol)
lx = max_x / float(nx)
ly = max_y / float(ny)
truex = np.tile(np.arange(nx) * lx + lx / 2. + minx,
(ny, 1)).flatten().astype(np.float32)
truey = np.tile(np.arange(ny) * ly + ly / 2. + minx,
(nx, 1)).flatten('F').astype(np.float32)
ind = np.random.choice(int(nx * ny), size=nstar, replace=False)
truef = np.ones_like(truex) * 20000
print "Max flux %1.3e" % (max(truef))
noise = np.random.normal(size=(imsz[1], imsz[0])).astype(np.float32)
mock = image_model_eval(truex, truey, truef, trueback, imsz, nc, cf)
mock[mock < 1] = 1. # maybe some negative pixels
variance = trueback / gain # mock/gain
mock += (np.sqrt(variance) * np.random.normal(size=(imsz[1], imsz[0]))).astype(
np.float32)
plt.imshow(mock, origin='lower', interpolation='None')
plt.show()
fname = 'Data/mock' + flabel
f = open(fname + 'pix.txt', 'w')
f.write('%1d\t%1d\t1\n0.\t%0.3f' % (imsz[0], imsz[1], gain))
f.close()
np.savetxt(fname + 'cts.txt', mock)
def multiband_retro_frames(result_path, ref_cat_path, data_path,\
hubble_cat_path=None, \
chain_datatype='npz', \
nframes=10, \
mock2_type=None, \
boolplotsave=1, \
boolplotshow=0, \
frame_number_list=None, \
datatype='real', \
plttype='pdf', \
bright_n=50, \
imdim=100, \
bands=['r']):
if datatype == 'mock':
labldata = 'Mock Truth'
else:
labldata = datatype
sizefac = 10. * 136
if chain_datatype.lower() == 'npz':
chain = np.load(chain_path + '/chain.npz')
elif chain_datatype.lower() == 'hdf5':
chain = h5py.File(chain_path + '/chain.hdf5', 'r')
else:
raise IOError(
'Could not read in data type, please use .npz or .hdf5 files.')
nsrcs = chain['n']
xsrcs = np.array(chain['x'], dtype=np.float32)
ysrcs = np.array(chain['y'], dtype=np.float32)
fsrcs = chain['f']
colorsrcs = chain['colors']
chi2 = chain['chi2']
timestats = chain['times'] # should be an array of shape (nsamp, 5)
acceptfracs = chain['accept']
nmgy_per_count = chain['nmgy']
bkgs = chain['back']
pixel_transfer_mats = chain['pixel_transfer_mats']
print 'backgrounds:', bkgs
nsamp = len(nsrcs)
nbands = len(bands)
ref_cat = np.loadtxt(ref_cat_path)
ref_x = ref_cat[:, 0]
ref_y = ref_cat[:, 1]
ref_f = ref_cat[:, 2:]
ref_mags = []
for b in xrange(nbands):
ref_mag = adu_to_magnitude(ref_f[:, b], nmgy_per_count[b])
ref_mags.append(ref_mag)
ref_colors = []
for b in xrange(nbands - 1):
ref_color = ref_mags[b] - ref_mags[b + 1]
ref_colors.append(ref_color)
hpath2 = '/n/fink1/rfeder/mpcat/multiband_pcat/Data/idR-002583-2-0136/hubble_catalog_2583-2-0136_astrans.txt'
# use transform q to get hubble coordinates in other bands, or mean_dpos
if hubble_cat_path is not None:
hubble_coords, hf, hmask, posmask, hx, hy = get_hubble(hubble_cat_path,
hpath_2=hpath2)
#hubble_coords = np.loadtxt(hubble_cat_path)
#hx0 = hubble_coords[:,0]-310
#hy0 = hubble_coords[:,1]-630
#h_rmag = hubble_coords[:,2]
#hx1, hy1 = transform_q(h_coords[0][posmask], h_coords[1][posmask], pixel_transfer_mats[first_frame_band_no-
psf_basic_path = data_path + '/' + dataname + '/psfs/' + dataname + '-psf.txt'
cts_basic_path = data_path + '/' + dataname + '/cts/' + dataname + '-cts.txt'
gains = dict()
biases = dict()
#if datatype != 'mock':
# frame_basic_path = data_path+'/'+dataname+'/frames/frame--'+run_cam_field+'.fits'
# gains = dict({"r":4.61999, "i":4.38999, "g":4.2, "z":5.67999})
# biases = dict({"r":1044., "i":1177., "g":1113., "z":1060.})
for band in bands:
pix_path = data_path + '/' + dataname + '/pixs/' + dataname + '-pix' + band + '.txt'
g = open(pix_path)
a = g.readline().split()
bias, gain = [np.float32(i) for i in np.float32(g.readline().split())]
gains[band] = gain
biases[band] = bias
#print 'biases:', biases
#print 'gains:', gains
#print 'nmgy_per_count:', nmgy_per_count
color_bins = np.linspace(-4, 4, 50)
#for band in bands:
#if datatype=='mock':
#pix_path = data_path+'/'+dataname+'/pixs/'+dataname+'-pix'+band+'.txt'
#g = open(pix_path)
#a = g.readline().split()
#np.float32(g.readline().split())
#frame_path = frame_basic_path.replace('--', '-'+band+'-')
#mean_dpos = dict({'r-i':[-1.,3.], 'r-g':[3.,10.], 'r-z':[1.,7.], 'r-r':[0.,0.]})
mean_dpos = dict({'r-i': [-1., 3.], 'r-g': [-2., 12.]})
if frame_number_list is None:
frame_number_list = np.linspace(0, nsamp, nframes)
c = 0
for num in frame_number_list:
num = max(int(num - 1), 0)
x = 5 * nbands
# data, residual, magnitude distribution
plt.figure(figsize=(15, 10))
for b in xrange(nbands):
bop = int(3 * b)
psf_path = psf_basic_path.replace('.txt', bands[b] + '.txt')
#if datatype != 'mock':
# psf_path = psf_path.replace('.txt', '-refit_g.txt') # only if using refit psf!
#print 'psf_path:', psf_path
cts_path = cts_basic_path.replace('.txt', bands[b] + '.txt')
psf, nc, cf = get_psf_and_vals(psf_path)
#get background
data = np.loadtxt(cts_path)
imsz = [len(data), len(data[0])]
if datatype != 'mock':
data -= biases[bands[b]]
#print biases[bands[b]]
if b == 0:
xs = xsrcs[num]
ys = ysrcs[num]
if hubble_cat_path is not None:
hx_band, hy_band = hx, hy
else:
xs, ys = transform_q(xsrcs[num], ysrcs[num],
pixel_transfer_mats[b - 1])
if datatype != 'mock':
col_name = bands[0] + '-' + bands[b]
#print mean_dpos[col_name]
xs -= mean_dpos[col_name][0]
ys -= mean_dpos[col_name][1]
if hubble_cat_path is not None:
#print 'pixel_transfer_mats'
#print pixel_transfer_mats
hx_band, hy_band = transform_q(
hx, hy, pixel_transfer_mats[b - 1])
hx_band -= mean_dpos[col_name][0]
hy_band -= mean_dpos[col_name][1]
model = image_model_eval(xs, ys, fsrcs[b, num], bkgs[b], imsz, nc,
cf)
resid = data - model
variance = data / gains[bands[b]]
weight = 1. / variance
np.savetxt(
result_path + '/residuals/resid_' + str(num) + str(bands[b]) +
'.txt', resid * np.sqrt(weight))
# plt.figure()
# plt.imshow(resids[0,b,:,:]*np.sqrt(weight), origin='lower', interpolation='none', cmap='Greys', vmin=-30, vmax=30)
# if boolplotsave:
# plt.savefig(result_path + '/residuals/resid_' + str(num) +str(bands[b])+ '.'+plttype, bbox_inches='tight')
# plt.close()
#plt.figure(figsize=(15,x))
plt.subplot(nbands, 3, 1 + bop)
plt.imshow(data,
origin='lower',
interpolation='none',
cmap='Greys',
vmin=np.min(data),
vmax=np.percentile(data, 95))
plt.colorbar()
if hubble_cat_path is not None:
#print 'using Hubble coordinates'
#print 'hx_band[posmask]:'
#print hx_band[posmask]
#print 'hmask length'
#print len(hmask)
#print 'hx_band[posmask][hmask]'
#print hx_band[posmask][hmask]
plt.scatter(hx_band[hmask],
hy_band[hmask],
marker='+',
s=2 * mag_to_cts(hf[hmask], nmgy_per_count[b]) /
sizefac,
color='lime')
#plt.scatter(hubble_coords[1+2*b][posmask][hmask], hubble_coords[2*b][posmask][hmask], marker='+', s=2*mag_to_cts(hf[hmask], nmgy) / sizefac, color='lime') #hubble
else:
mask = ref_f[:,
0] > 250 # will have to change this for other data sets
plt.scatter(ref_x[mask],
ref_y[mask],
marker='+',
s=ref_f[:, b][mask] / sizefac,
color='lime')
mask = np.logical_not(mask)
plt.scatter(ref_x[mask],
ref_y[mask],
marker='+',
s=ref_f[:, b][mask] / sizefac,
color='g')
if len(data) > 100:
plt.scatter(xs,
ys,
marker='x',
s=(len(data)**2 / 1e5) * fsrcs[b, num] /
(2 * sizefac),
color='r')
else:
plt.scatter(xs,
ys,
marker='x',
s=(1e4 / len(data)**2) * fsrcs[b, num] /
(2 * sizefac),
color='r')
plt.xlim(-0.5, len(data) - 0.5)
plt.ylim(-0.5, len(data) - 0.5)
plt.subplot(nbands, 3, 2 + bop)
plt.imshow(resid * np.sqrt(weight),
origin='lower',
interpolation='none',
cmap='Greys',
vmin=-5,
vmax=5)
plt.xlim(-0.5, len(data) - 0.5)
plt.ylim(-0.5, len(data) - 0.5)
plt.colorbar()
plt.subplot(nbands, 3, 3 + bop)
mags = adu_to_magnitude(fsrcs[b, num], nmgy_per_count[b])
mags = mags[~np.isinf(mags)]
(n, bins, patches) = plt.hist(ref_mags[b],
histtype='step',
label=labldata,
color='g')
plt.hist(mags,
bins=bins,
alpha=0.5,
label='Chain - ' + bands[b],
color='r',
histtype='step')
plt.legend()
plt.xlabel(str(bands[b]))
plt.yscale('log')
if boolplotsave:
plt.savefig(result_path + '/frames/sample_' + str(num) + '_mags.' +
plttype,
bbox_inches='tight')
if boolplotshow:
plt.show()
plt.close()
plt.figure(figsize=(10, 5))
for b in xrange(nbands - 1):
colors = colorsrcs[b][num]
colors = adus_to_color(fsrcs[0, num], fsrcs[b + 1, num],
nmgy_per_count)
plt.subplot(1, nbands - 1, b + 1)
#print 'colors:', colors
plt.hist(colors[~np.isnan(colors)],
label='Chain',
bins=color_bins,
bottom=0.1,
histtype='step',
color='r')
plt.hist(ref_colors[b],
label=labldata,
bins=color_bins,
bottom=0.1,
histtype='step',
color='g')
plt.legend(loc=2)
plt.yscale('log')
plt.xlabel(bands[0] + ' - ' + bands[b + 1])
if boolplotsave and nbands > 1:
plt.savefig(result_path +
'/color_histogram/color_histograms_sample_' +
str(num) + '.' + plttype,
bbox_inches='tight')
if boolplotshow and nbands > 1:
plt.show()
plt.close()
def writ_truedata():
pathlion = os.environ["LION_PATH"]
sys.path.insert(0, pathlion)
from image_eval import image_model_eval, psf_poly_fit
dictglob = dict()
sersindx = 2.
numbsidegrid = 20
pathliondata = os.environ["LION_DATA_PATH"] + '/data/'
pathlionimag = os.environ["LION_DATA_PATH"] + '/imag/'
fileobjt = open(pathliondata + 'sdss.0921_psf.txt')
numbsidepsfn, factsamp = [np.int32(i) for i in fileobjt.readline().split()]
fileobjt.close()
psfn = np.loadtxt(pathliondata + 'sdss.0921_psf.txt',
skiprows=1).astype(np.float32)
cpsf = psf_poly_fit(psfn, factsamp)
cpsf = cpsf.reshape((-1, cpsf.shape[2]))
np.random.seed(0)
numbside = [100, 100]
# generate stars
numbstar = 1
fluxdistslop = np.float32(2.0)
minmflux = np.float32(250.)
logtflux = np.random.exponential(scale=1. / (fluxdistslop - 1.),
size=numbstar).astype(np.float32)
dictglob['numbstar'] = numbstar
dictglob['xposstar'] = (np.random.uniform(size=numbstar) *
(numbside[0] - 1)).astype(np.float32)
dictglob['yposstar'] = (np.random.uniform(size=numbstar) *
(numbside[1] - 1)).astype(np.float32)
dictglob['fluxdistslop'] = fluxdistslop
dictglob['minmflux'] = minmflux
dictglob['fluxstar'] = minmflux * np.exp(logtflux)
dictglob['specstar'] = dictglob['fluxstar'][None, :]
dictglob['back'] = np.float32(179.)
dictglob['gain'] = np.float32(4.62)
# generate galaxies
numbgalx = 100
dictglob['numbgalx'] = numbgalx
dictglob['xposgalx'] = (np.random.uniform(size=numbgalx) *
(numbside[0] - 1)).astype(np.float32)
dictglob['yposgalx'] = (np.random.uniform(size=numbgalx) *
(numbside[1] - 1)).astype(np.float32)
dictglob['sizegalx'] = samp_powr(2., 10., 1.5, size=numbgalx)
dictglob['avecfrst'] = (2. * np.random.uniform(size=numbgalx) - 1.).astype(
np.float32)
dictglob['avecseco'] = (2. * np.random.uniform(size=numbgalx) - 1.).astype(
np.float32)
dictglob['avecthrd'] = (2. * np.random.uniform(size=numbgalx) - 1.).astype(
np.float32)
mgtd = np.sqrt(dictglob['avecfrst']**2 + dictglob['avecseco']**2 +
dictglob['avecthrd']**2)
dictglob['avecfrst'] /= mgtd
dictglob['avecseco'] /= mgtd
dictglob['avecthrd'] /= mgtd
dictglob['specgalx'] = samp_powr(2500., 25000., 2., size=numbgalx)[None, :]
dictglob['sbrtgalx'] = retr_sbrt(dictglob['specgalx'],
dictglob['sizegalx'], sersindx)
gdat = gdatstrt()
listsersindx = [0.5, 1., 2., 4., 6., 8., 10.]
for sersindx in listsersindx:
gdat.sersindx = sersindx
gridphon, amplphon = retr_sers(numbsidegrid=numbsidegrid,
sersindx=sersindx,
pathplot=pathlionimag)
gridphon, amplphon = retr_sers(numbsidegrid=numbsidegrid,
sersindx=sersindx,
pathplot=pathlionimag)
numbphongalx = (numbsidegrid + 1)**2
numbener = 1
numbphon = numbgalx * numbphongalx
xposphon = np.empty(numbphon)
yposphon = np.empty(numbphon)
specphon = np.empty((numbener, numbphon))
for k in range(dictglob['numbgalx']):
indx = np.arange(k * numbphongalx, (k + 1) * numbphongalx)
gridphontemp = gridphon * dictglob['sizegalx'][k]
xposphon[indx], yposphon[indx], specphon[:, indx] = retr_tranphon(gridphontemp, amplphon, dictglob['xposgalx'][k], dictglob['yposgalx'][k], dictglob['specgalx'][:, k], \
dictglob['avecfrst'][k], dictglob['avecseco'][k], dictglob['avecthrd'][k], 'fris')
xposcand = np.concatenate(
(xposphon, dictglob['xposstar'])).astype(np.float32)
yposcand = np.concatenate(
(yposphon, dictglob['yposstar'])).astype(np.float32)
speccand = np.concatenate((specphon, dictglob['specstar']),
axis=1).astype(np.float32)
indx = np.where((xposcand < 100.) & (xposcand > 0.) & (yposcand < 100.)
& (yposcand > 0.))[0]
xposcand = xposcand[indx]
yposcand = yposcand[indx]
speccand = speccand[:, indx]
# generate data
datacnts = image_model_eval(xposcand, yposcand, speccand[0, :],
dictglob['back'], numbside, numbsidepsfn,
cpsf)
#datacnts[datacnts < 1] = 1. # maybe some negative pixels
variance = datacnts / dictglob['gain']
datacnts += (np.sqrt(variance) *
np.random.normal(size=(numbside[1], numbside[0]))).astype(
np.float32)
dictglob['datacnts'] = datacnts
# auxiliary data
dictglob['numbside'] = numbside
dictglob['psfn'] = psfn
# write data to disk
path = pathliondata + 'true.h5'
filearry = h5py.File(path, 'w')
for attr, valu in dictglob.iteritems():
filearry.create_dataset(attr, data=valu)
filearry.close()
gdat.pathlionimag = pathlionimag
plot_cntsmaps(gdat, datacnts, 'truedatacnts')
plot_cntsmaps(gdat,
datacnts,
'truedatacntsphon',
xposcand=xposcand,
yposcand=yposcand,
speccand=speccand)
def clus_popmap(ltfile,
maps,
map_size,
band,
name,
pixsize,
fwhm,
loz=None,
superplot=0,
savemaps=0):
# read in the image.dat file
ra = []
dec = []
mag = []
with open(ltfile, 'r') as f:
data = f.readlines()
for i in range(len(data)):
val = data[i].strip().split(' ')
if i == 0:
racent = float(val[-2])
deccent = float(val[-1])
else:
ra.append(float(val[1]))
dec.append(float(val[2]))
mag.append(float(val[-1]))
f.close()
# if len(loz) == 8 :
# ra = [ra,loz['x']]
# dec = [dec,loz['y']]
refx = float(racent)
refy = float(deccent)
# convert ra/dec to degrees
ra = [((-x / 3600.0) + refx) for x in ra]
dec = [((y / 3600.0) + refy) for y in dec]
flux = [10.0**(-k / 2.5) for k in mag]
# if len(loz) == 8 :
# flux = [flux,loz['f']]
if superplot:
plt.scatter(ra, dec, s=2, c=flux)
plt.colorbar()
plt.title('Clus Popmap: Pixels')
plt.show()
header = maps['shead']
wcs = WCS(header)
coords = SkyCoord(ra=ra * u.deg, dec=dec * u.deg)
x, y = skycoord_to_pixel(coords, wcs)
truthtable = {'x': x, 'y': y, 'flux': flux}
if superplot:
plt.scatter(x, y, s=2, c=flux)
plt.colorbar()
plt.title('Clus Popmap: Skycoord')
plt.show()
# make the output map to have noise added later
# xf = np.floor(x)
# yf = np.floor(y)
# cmap = np.zeros((map_size,map_size),dtype=np.float32)
# nx, ny = cmap.shape
# np.place(xf, xf > nx-1, nx-1)
# np.place(yf, yf > ny-1, ny-1)
# for cx, cy, cf in zip(xf, yf, flux):
# cmap[int(cy), int(cx)] += cf # Note transpose
#
# beam = get_gauss_beam(fwhm,pixsize,band,oversamp=5)
# sim_map = convolve(cmap, beam, boundary='wrap')
''' PCAT LION METHOD'''
orig_length = len(x)
position_mask = np.logical_and(np.logical_and(x > 0, x < map_size),
np.logical_and(y > 0, y < map_size))
x = np.array(x, dtype=np.float32)[position_mask]
y = np.array(y, dtype=np.float32)[position_mask]
flux = np.array(flux, dtype=np.float32)[position_mask]
psf, cf, nc, nbin = get_gaussian_psf_template(
fwhm, pixel_fwhm=3.) # assumes pixel fwhm is 3 pixels in each band
sim_map = image_model_eval(x, y, nc * flux, 0.0,
(int(map_size), int(map_size)), int(nc), cf)
'''#############################################################################################################'''
if superplot:
plt.imshow(sim_map,
extent=(0, 300, 0, 300),
clim=[0.0, 0.15],
origin=0)
plt.colorbar()
plt.title('Clus Popmap: Lensed map')
plt.show()
if savemaps:
hdx = fits.PrimaryHDU(maps['signal'], maps['shead'])
sz = fits.PrimaryHDU(sim_map, hdx.header)
if os.path.isfile(config.SIMBOX + 'lensedmap_' + name + '_' + band +
'.fits'):
os.remove(config.SIMBOX + 'lensedmap_' + name + '_' + band +
'.fits')
sz.writeto(config.SIMBOX + 'lensedmap_' + name + '_' + band + '.fits')
return sim_map, truthtable