def get_cfht_catalog(mags=['i'], maglim=27., returnTable=False):
from astrometry.util.pyfits_utils import fits_table
from tractor import Mags, RaDecPos, PointSource, Images, Catalog
from tractor.galaxy import DevGalaxy, ExpGalaxy, CompositeGalaxy, GalaxyShape
T = fits_table(
'/project/projectdirs/bigboss/data/cs82/W4p1m1_i.V2.7A.swarp.cut.deVexp.fit',
hdunum=2)
print 'Read', len(T), 'sources'
# Cut to ROI
(ra0, ra1, dec0, dec1) = radecroi
T.ra = T.alpha_j2000
T.dec = T.delta_j2000
T = T[(T.ra > ra0) * (T.ra < ra1) * (T.dec > dec0) * (T.dec < dec1)]
print 'Cut to', len(T), 'objects in ROI.'
srcs = Catalog()
keepi = []
for i, t in enumerate(T):
if t.chi2_psf < t.chi2_model and t.mag_psf <= maglim:
#print 'PSF'
themag = t.mag_psf
m = Mags(order=mags, **dict([(k, themag) for k in mags]))
srcs.append(PointSource(RaDecPos(t.ra, t.dec), m))
keepi.append(i)
continue
if t.mag_disk > maglim and t.mag_spheroid > maglim:
#print 'Faint'
continue
keepi.append(i)
themag = t.mag_spheroid
m_exp = Mags(order=mags, **dict([(k, themag) for k in mags]))
themag = t.mag_disk
m_dev = Mags(order=mags, **dict([(k, themag) for k in mags]))
# SPHEROID_REFF [for Sersic index n= 1] = 1.68 * DISK_SCALE
shape_dev = GalaxyShape(t.disk_scale_world * 1.68 * 3600.,
t.disk_aspect_world, t.disk_theta_world + 90.)
shape_exp = GalaxyShape(t.spheroid_reff_world * 3600.,
t.spheroid_aspect_world,
t.spheroid_theta_world + 90.)
pos = RaDecPos(t.alphamodel_j2000, t.deltamodel_j2000)
if t.mag_disk > maglim and t.mag_spheroid <= maglim:
#print 'Exp'
srcs.append(ExpGalaxy(pos, m_exp, shape_exp))
continue
if t.mag_disk <= maglim and t.mag_spheroid > maglim:
#print 'deV'
srcs.append(DevGalaxy(pos, m_dev, shape_dev))
continue
# exp + deV
srcs.append(CompositeGalaxy(pos, m_exp, shape_exp, m_dev, shape_dev))
if returnTable:
import numpy as np
T.cut(np.array(keepi))
return srcs, T
return srcs
def readPhotoObj(self, run, camcol, field, filename=None):
obj = PhotoObj(run, camcol, field)
if filename is None:
fn = self.getPath('photoObj', run, camcol, field)
else:
fn = filename
obj.table = fits_table(fn)
return obj
def get_cfht_catalog(mags=['i'], maglim = 27., returnTable=False):
from astrometry.util.pyfits_utils import fits_table
from tractor import Mags, RaDecPos, PointSource, Images, Catalog
from tractor.sdss_galaxy import DevGalaxy, ExpGalaxy, CompositeGalaxy, GalaxyShape
T = fits_table('/project/projectdirs/bigboss/data/cs82/W4p1m1_i.V2.7A.swarp.cut.deVexp.fit', hdunum=2)
print 'Read', len(T), 'sources'
# Cut to ROI
(ra0,ra1, dec0,dec1) = radecroi
T.ra = T.alpha_j2000
T.dec = T.delta_j2000
T = T[(T.ra > ra0) * (T.ra < ra1) * (T.dec > dec0) * (T.dec < dec1)]
print 'Cut to', len(T), 'objects in ROI.'
srcs = Catalog()
keepi = []
for i,t in enumerate(T):
if t.chi2_psf < t.chi2_model and t.mag_psf <= maglim:
#print 'PSF'
themag = t.mag_psf
m = Mags(order=mags, **dict([(k, themag) for k in mags]))
srcs.append(PointSource(RaDecPos(t.ra, t.dec), m))
keepi.append(i)
continue
if t.mag_disk > maglim and t.mag_spheroid > maglim:
#print 'Faint'
continue
keepi.append(i)
themag = t.mag_spheroid
m_exp = Mags(order=mags, **dict([(k, themag) for k in mags]))
themag = t.mag_disk
m_dev = Mags(order=mags, **dict([(k, themag) for k in mags]))
# SPHEROID_REFF [for Sersic index n= 1] = 1.68 * DISK_SCALE
shape_dev = GalaxyShape(t.disk_scale_world * 1.68 * 3600., t.disk_aspect_world,
t.disk_theta_world + 90.)
shape_exp = GalaxyShape(t.spheroid_reff_world * 3600., t.spheroid_aspect_world,
t.spheroid_theta_world + 90.)
pos = RaDecPos(t.alphamodel_j2000, t.deltamodel_j2000)
if t.mag_disk > maglim and t.mag_spheroid <= maglim:
#print 'Exp'
srcs.append(ExpGalaxy(pos, m_exp, shape_exp))
continue
if t.mag_disk <= maglim and t.mag_spheroid > maglim:
#print 'deV'
srcs.append(DevGalaxy(pos, m_dev, shape_dev))
continue
# exp + deV
srcs.append(CompositeGalaxy(pos, m_exp, shape_exp, m_dev, shape_dev))
if returnTable:
import numpy as np
T.cut(np.array(keepi))
return srcs, T
return srcs
def readFrame(self, run, camcol, field, band, filename=None):
'''
http://data.sdss3.org/datamodel/files/BOSS_PHOTOOBJ/frames/RERUN/RUN/CAMCOL/frame.html
'''
f = Frame(run, camcol, field, band)
# ...
if filename is None:
fn = self.getPath('frame', run, camcol, field, band)
else:
fn = filename
#print 'reading file', fn
p = pyfits.open(fn)
#print 'got', len(p), 'HDUs'
# in nanomaggies
f.image = p[0].data
f.header = p[0].header
# converts counts -> nanomaggies
f.calib = p[1].data
# table with val,x,y -- binned; use bilinear interpolation to expand
sky = p[2].data
f.sky = sky.field('allsky')[0]
#print 'sky shape', f.sky.shape
if len(f.sky.shape) != 2:
f.sky = f.sky.reshape((-1, 256))
f.skyxi = sky.field('xinterp')[0]
f.skyyi = sky.field('yinterp')[0]
#print 'p3:', p[3]
# table -- asTrans structure
tab = fits_table(p[3].data)
assert(len(tab) == 1)
tab = tab[0]
# DR7 has NODE, INCL in radians...
f.astrans = AsTrans(run, camcol, field, band,
node=np.deg2rad(tab.node), incl=np.deg2rad(tab.incl),
astrans=tab, cut_to_band=False)
return f
parser.add_option('-X', dest='xcol', help='Name of X column in image table')
parser.add_option('-Y', dest='ycol', help='Name of Y column in image table')
parser.add_option('-N', dest='nimage', type='int', help='Cut to the first N image sources')
parser.add_option('-x', dest='rxcol', help='Name of X column in reference table')
parser.add_option('-y', dest='rycol', help='Name of Y column in reference table')
parser.add_option('-n', dest='nref', type='int', help='Cut to the first N reference sources')
parser.add_option('-c', dest='cells', type='int', help='Approx. number of pieces to cut image into (default:18)')
parser.add_option('-s', dest='cellsize', type='int', help='Search radius, in pixels (default 50)')
parser.set_defaults(xcol='X', ycol='Y', nimage=0, cells=0, cellsize=0, rxcol='X', rycol='Y', nref=0)
opt,args = parser.parse_args()
if len(args) != 3:
parser.print_help()
sys.exit(-1)
imxy = fits_table(args[0])
refxy = fits_table(args[1])
outfn = args[2]
kwargs = {}
if opt.cells:
kwargs['ncells'] = opt.cells
if opt.cellsize:
kwargs['dcell'] = opt.cellsize
ix = imxy.getcolumn(opt.xcol)
iy = imxy.getcolumn(opt.ycol)
ixy = vstack((ix,iy)).T
if opt.nimage:
ixy = ixy[:opt.nimage,:]
help='Search radius, in pixels (default 50)')
parser.set_defaults(xcol='X',
ycol='Y',
nimage=0,
cells=0,
cellsize=0,
rxcol='X',
rycol='Y',
nref=0)
opt, args = parser.parse_args()
if len(args) != 3:
parser.print_help()
sys.exit(-1)
imxy = fits_table(args[0])
refxy = fits_table(args[1])
outfn = args[2]
kwargs = {}
if opt.cells:
kwargs['ncells'] = opt.cells
if opt.cellsize:
kwargs['dcell'] = opt.cellsize
ix = imxy.getcolumn(opt.xcol)
iy = imxy.getcolumn(opt.ycol)
ixy = vstack((ix, iy)).T
if opt.nimage:
ixy = ixy[:opt.nimage, :]
