def load (self,ns,filename=None,format=None):
"""Loads LSM file. Filename/format arguments may be used to override those
specified in the constructor or via options""";
filename = filename or self.filename;
format = format or self.format;
self.lsm = LSMClass();
# set up table of format readers
# all are expected to take an lsm object (e.g. self) as arg 1,
# a filename as arg2, and a node scope as arg3
FORMAT_READERS = {};
FORMAT_READERS[NATIVE] = LSM.load;
FORMAT_READERS[NEWSTAR] = LSM.build_from_newstar;
FORMAT_READERS[NVSS] = LSM.build_from_catalog;
FORMAT_READERS[CLEAN] = LSM.build_from_complist;
FORMAT_READERS[TEXT_RAD] = LSM.build_from_extlist_rad;
FORMAT_READERS[TEXT_DMS] = LSM.build_from_extlist;
FORMAT_READERS[VIZIER] = LSM.build_from_vizier;
FORMAT_READERS[OR_GSM] = LSM.build_from_orgsm;
FORMAT_READERS[SKA] = LSM.build_from_ska;
# read LSM using the selected format reader
reader = FORMAT_READERS.get(format,None);
if reader is None:
raise TypeError("Unknown LSM format '%s'"%format);
try:
reader(self.lsm,filename,ns);
except:
traceback.print_exc();
raise RuntimeError("""There was an error reading the LSM file %s. Either the file format is set incorrectly, or the LSM file is corrupt."""%filename);
# save if needed
if self.save_native and self.save_native_filename:
self.lsm.save(self.save_native_filename);
# save if needed
if self.save_text and self.save_text_filename:
self.lsm.save_as_extlist(self.save_text_filename,ns,prefix='');
def load (self,ns,filename=None,format=None):
"""Loads LSM file. Filename/format arguments may be used to override those
specified in the constructor or via options""";
filename = filename or self.filename;
format = format or self.format;
self.lsm = LSMClass();
# set up table of format readers
# all are expected to take an lsm object (e.g. self) as arg 1,
# a filename as arg2, and a node scope as arg3
FORMAT_READERS = {};
FORMAT_READERS[NATIVE] = LSM.load;
FORMAT_READERS[NEWSTAR] = LSM.build_from_newstar;
FORMAT_READERS[NVSS] = LSM.build_from_catalog;
FORMAT_READERS[CLEAN] = LSM.build_from_complist;
FORMAT_READERS[TEXT_RAD] = LSM.build_from_extlist_rad;
FORMAT_READERS[TEXT_DMS] = LSM.build_from_extlist;
FORMAT_READERS[VIZIER] = LSM.build_from_vizier;
FORMAT_READERS[OR_GSM] = LSM.build_from_orgsm;
FORMAT_READERS[SKA] = LSM.build_from_ska;
# read LSM using the selected format reader
reader = FORMAT_READERS.get(format,None);
if reader is None:
raise TypeError,"Unknown LSM format '%s'"%format;
try:
reader(self.lsm,filename,ns);
except:
traceback.print_exc();
raise RuntimeError,"""There was an error reading the LSM file %s. Either the file format is set incorrectly, or the LSM file is corrupt."""%filename;
# save if needed
if self.save_native and self.save_native_filename:
self.lsm.save(self.save_native_filename);
# save if needed
if self.save_text and self.save_text_filename:
self.lsm.save_as_extlist(self.save_text_filename,ns,prefix='');
class MeowLSM (object):
def __init__ (self,filename=None,format=NATIVE,include_options=True,option_namespace='lsm'):
"""Initializes a MeowLSM object.
A filename and a format may be specified, although the actual file will\
only be loaded on demand.
If include_options=True, immediately instantiates the options. If False, it is up to
the caller to include the options in his menus.
""";
self.tdloption_namespace = option_namespace;
self._compile_opts = [];
self._runtime_opts = [];
self.filename = filename;
self.format = format;
self.lsm = None;
self.show_gui = False;
# immediately include options, if needed
if include_options:
TDLCompileOptions(*self.compile_options());
TDLRuntimeOptions(*self.runtime_options());
def compile_options (self):
"""Returns list of compile-time options""";
if not self._compile_opts:
self._compile_opts.append(
TDLOption("filename","LSM file",
TDLFileSelect("*.lsm *.txt *.*",default=self.filename,exist=True),
namespace=self)
);
format_opt = TDLOption("format","File format",
[ NATIVE,NEWSTAR,NVSS,CLEAN,TEXT_RAD,TEXT_DMS,VIZIER,OR_GSM,SKA ],
namespace=self);
self._compile_opts.append(format_opt);
beam_opt = TDLOption("beam_expr","Primary beam expression",
[ None,
"cos(min(65*fq*r,1.0881))**6 # WSRT",
"max(cos(65*fq*r)**6,.01) # NEWSTAR",
],more=str,namespace=self,
doc="""<P>This is the primary power beam expression used to convert intrinsic <i>I</i> flux
as given by the LSM to apparent flux <b>for purposes of sorting only</b>.
If not specified, LSM sources will be sorted by intrinsic <i>I</i> flux. The order of the sources is
relevant to the "LSM subset" option below.</P>
<P>Note again that this beam expression only affects the sort order of the sources. The actual
source fluxes used in your tree will always be as per the LSM itself -- it is up to the tree to
incorporate a proper primary beam model as required.</P>
<P>The beam expression can be any valid Python expression (all functions from the
math module are available). The variables 'r' and 'fq' refer to the source distance
from field centre (in radians) and reference frequency (in GHz), respectively.</P>
<P>If your LSM uses apparent rather than intrinsic fluxes, or you don't need to sort
the sources by apparent flux, set this option to 'None'.</P>""");
self._compile_opts.append(beam_opt);
subset_doc = """<P>Selects a subset of sources from the
LSM. You may specify sources:</P>
<P>* by name</P>
<P>* by ordinal number (from 0, in order of decreasing brightness)</P>
<P>* as ranges, e.g. "M:N" (M to N inclusive), or ":M" (0 to M), or "N:" (N to last).
<P>Prefixing a name or a number or a range by "-" excludes that source from the selection.</P>
<P>Examples: "-foo" (all sources except 'foo'), "0 3:5 bar" (sources #0,3,4,5 and 'bar'),
"-3:5 -foo" (all sources except 3,4,5 and 'foo'.)</P>""";
subset_opt = TDLOption('lsm_subset',"Use subset of LSM sources",
["all"],more=str,namespace=self,doc=subset_doc);
self._subset_parser = Meow.OptionTools.ListOptionParser(minval=0,name="source");
subset_opt.set_validator(self._subset_parser.validator);
self._compile_opts.append(subset_opt);
solve_subset_opt = TDLOption("solve_subset","For which sources",["all"],
more=str,namespace=self,doc=subset_doc);
self._solve_subset_parser = Meow.OptionTools.ListOptionParser(minval=0,name="source");
self._compile_opts.append(
TDLMenu("Make solvable source parameters",
solve_subset_opt,
TDLOption("solve_I","I",False,namespace=self),
TDLOption("solve_Q","Q",False,namespace=self),
TDLOption("solve_U","U",False,namespace=self),
TDLOption("solve_V","V",False,namespace=self),
TDLOption("solve_spi","spectral index",False,namespace=self),
TDLOption("solve_pos","position",False,namespace=self),
TDLOption("solve_RM","rotation measure",False,namespace=self),
TDLOption("solve_shape","shape (for extended sources)",False,namespace=self),
toggle='solvable_sources',namespace=self,
));
save_opt = TDLMenu("Save LSM in native format",toggle="save_native",default=False,namespace=self,
*( TDLOption("save_native_filename","Filename",
TDLFileSelect("*.lsm",exist=False),
namespace=self),));
self._compile_opts.append(save_opt);
save_txt_opt = TDLMenu("Save LSM in text (hms/dms) format",toggle="save_text",
default=False,namespace=self,
*( TDLOption("save_text","Filename",False,namespace=self),));
self._compile_opts.append(save_txt_opt);
def _select_format (format):
if format == NATIVE:
save_opt.set_value(False,save=False);
format_opt.when_changed(_select_format);
# self._compile_opts += [
# TDLOption("show_gui","Show LSM GUI",False,namespace=self)
# ];
return self._compile_opts;
def runtime_options (self):
"""Makes and returns list of compile-time options""";
# no runtime options, for now
return self._runtime_opts;
def load (self,ns,filename=None,format=None):
"""Loads LSM file. Filename/format arguments may be used to override those
specified in the constructor or via options""";
filename = filename or self.filename;
format = format or self.format;
self.lsm = LSMClass();
# set up table of format readers
# all are expected to take an lsm object (e.g. self) as arg 1,
# a filename as arg2, and a node scope as arg3
FORMAT_READERS = {};
FORMAT_READERS[NATIVE] = LSM.load;
FORMAT_READERS[NEWSTAR] = LSM.build_from_newstar;
FORMAT_READERS[NVSS] = LSM.build_from_catalog;
FORMAT_READERS[CLEAN] = LSM.build_from_complist;
FORMAT_READERS[TEXT_RAD] = LSM.build_from_extlist_rad;
FORMAT_READERS[TEXT_DMS] = LSM.build_from_extlist;
FORMAT_READERS[VIZIER] = LSM.build_from_vizier;
FORMAT_READERS[OR_GSM] = LSM.build_from_orgsm;
FORMAT_READERS[SKA] = LSM.build_from_ska;
# read LSM using the selected format reader
reader = FORMAT_READERS.get(format,None);
if reader is None:
raise TypeError("Unknown LSM format '%s'"%format);
try:
reader(self.lsm,filename,ns);
except:
traceback.print_exc();
raise RuntimeError("""There was an error reading the LSM file %s. Either the file format is set incorrectly, or the LSM file is corrupt."""%filename);
# save if needed
if self.save_native and self.save_native_filename:
self.lsm.save(self.save_native_filename);
# save if needed
if self.save_text and self.save_text_filename:
self.lsm.save_as_extlist(self.save_text_filename,ns,prefix='');
# if self.show_gui:
# self.lsm.display()
def source_list (self,ns,max_sources=None,**kw):
"""Reads LSM and returns a list of Meow objects.
ns is node scope in which they will be created.
Keyword arguments may be used to indicate which of the source attributes are to be
created as Parms, use e.g. I=Meow.Parm(tags="flux") for this.
The use_parms option may override this.
""";
if self.filename is None:
return [];
if self.lsm is None:
self.load(ns);
# all=1 returns unsorted list, so use a large count instead, to get a sorted list
plist = self.lsm.queryLSM(count=9999999);
# parse the beam expression
if self.beam_expr is not None:
try:
beam_func = eval("lambda r,fq:"+self.beam_expr);
except:
raise RuntimeError("invalid beam expression");
else:
beam_func = None;
# make list of direction,punit,I,I_apparent tuples
parm = Meow.Parm(tags="source solvable");
srclist = [];
for pu in plist:
ra,dec,I,Q,U,V,spi,freq0,RM = pu.getEssentialParms(ns);
if self.solve_pos:
ra = parm.new(ra);
dec = parm.new(dec);
direction = Meow.Direction(ns,pu.name,ra,dec,static=not self.solve_pos);
Iapp = I;
if beam_func is not None:
# if phase centre is already set (i.e. static), then lmn will be computed here, and we
# can apply a beam expression
lmn = direction.lmn_static();
if lmn is not None:
r = sqrt(lmn[0]**2+lmn[1]**2);
Iapp = I*beam_func(r,freq0*1e-9 or 1.4); # use 1.4 GHz if ref frequency not specified
# append to list
srclist.append((pu.name,direction,pu,I,Iapp));
# sort list by decreasing apparent flux
from past.builtins import cmp
from functools import cmp_to_key
srclist.sort(key=cmp_to_key(lambda a,b:cmp(b[4],a[4])));
srclist_full = srclist;
# extract active subset
srclist = self._subset_parser.apply(self.lsm_subset,srclist_full,names=[src[0] for src in srclist_full]);
# extract solvable subset
solve_subset = self._subset_parser.apply(self.solve_subset,srclist_full,names=[src[0] for src in srclist_full]);
solve_subset = set([src[0] for src in solve_subset]);
# make copy of kw dict to be used for sources not in solvable set
kw_nonsolve = dict(kw);
# and update kw dict to be used for sources in solvable set
if self.solvable_sources:
if self.solve_I:
kw.setdefault("I",parm);
if self.solve_Q:
kw.setdefault("Q",parm);
if self.solve_U:
kw.setdefault("U",parm);
if self.solve_V:
kw.setdefault("V",parm);
if self.solve_spi:
kw.setdefault("spi",parm);
if self.solve_RM:
kw.setdefault("RM",parm);
if self.solve_pos:
kw.setdefault("ra",parm);
kw.setdefault("dec",parm);
if self.solve_shape:
kw.setdefault("sx",parm);
kw.setdefault("sy",parm);
kw.setdefault("phi",parm);
# make Meow list
source_model = []
## Note: conversion from AIPS++ componentlist Gaussians to Gaussian Nodes
### eX, eY : multiply by 2
### eP: change sign
for name,direction,pu,I,Iapp in srclist:
# print "%-20s %12f %12f"%(pu.name,I,Iapp);
src = {};
( src['ra'],src['dec'],
src['I'],src['Q'],src['U'],src['V'],
src['spi'],src['freq0'],src['RM'] ) = pu.getEssentialParms(ns)
(eX,eY,eP) = pu.getExtParms()
# scale 2 difference
src['sx'] = eX*2
src['sy'] = eY*2
src['phi'] = -eP
# override zero values with None so that Meow can make smaller trees
if not src['RM']:
src['RM'] = None;
if not src['spi']:
src['spi'] = None;
if src['RM'] is None:
src['freq0'] = None;
## construct parms or constants for source attributes
## if source is in solvable set (solvable_source_set of None means all are solvable),
## use the kw dict, else use the nonsolve dict for source parameters
if name in solve_subset:
solvable = True;
kwdict = kw;
else:
solvable = False;
kwdict = kw_nonsolve;
for key,value in src.items():
meowparm = kwdict.get(key);
if isinstance(meowparm,Meow.Parm):
src[key] = meowparm.new(value);
elif meowparm is not None:
src[key] = value;
if eX or eY or eP:
# Gaussians
if eY:
size,phi = [src['sx'],src['sy']],src['phi'];
else:
size,phi = src['sx'],None;
src = Meow.GaussianSource(ns,name=pu.name,
I=src['I'],Q=src['Q'],U=src['U'],V=src['V'],
direction=direction,
spi=src['spi'],freq0=src['freq0'],RM=src['RM'],
size=size,phi=phi);
else:
src = Meow.PointSource(ns,name=pu.name,
I=src['I'],Q=src['Q'],U=src['U'],V=src['V'],
direction=direction,
spi=src['spi'],freq0=src['freq0'],RM=src['RM']);
# check for beam LM
if pu._lm is not None:
src.set_attr('beam_lm',pu._lm);
src.solvable = solvable;
src.set_attr('Iapp',Iapp);
source_model.append(src);
return source_model;
class MeowLSM (object):
def __init__ (self,filename=None,format=NATIVE,include_options=True,option_namespace='lsm'):
"""Initializes a MeowLSM object.
A filename and a format may be specified, although the actual file will\
only be loaded on demand.
If include_options=True, immediately instantiates the options. If False, it is up to
the caller to include the options in his menus.
""";
self.tdloption_namespace = option_namespace;
self._compile_opts = [];
self._runtime_opts = [];
self.filename = filename;
self.format = format;
self.lsm = None;
self.show_gui = False;
# immediately include options, if needed
if include_options:
TDLCompileOptions(*self.compile_options());
TDLRuntimeOptions(*self.runtime_options());
def compile_options (self):
"""Returns list of compile-time options""";
if not self._compile_opts:
self._compile_opts.append(
TDLOption("filename","LSM file",
TDLFileSelect("*.lsm *.txt *.*",default=self.filename,exist=True),
namespace=self)
);
format_opt = TDLOption("format","File format",
[ NATIVE,NEWSTAR,NVSS,CLEAN,TEXT_RAD,TEXT_DMS,VIZIER,OR_GSM,SKA ],
namespace=self);
self._compile_opts.append(format_opt);
beam_opt = TDLOption("beam_expr","Primary beam expression",
[ None,
"cos(min(65*fq*r,1.0881))**6 # WSRT",
"max(cos(65*fq*r)**6,.01) # NEWSTAR",
],more=str,namespace=self,
doc="""<P>This is the primary power beam expression used to convert intrinsic <i>I</i> flux
as given by the LSM to apparent flux <b>for purposes of sorting only</b>.
If not specified, LSM sources will be sorted by intrinsic <i>I</i> flux. The order of the sources is
relevant to the "LSM subset" option below.</P>
<P>Note again that this beam expression only affects the sort order of the sources. The actual
source fluxes used in your tree will always be as per the LSM itself -- it is up to the tree to
incorporate a proper primary beam model as required.</P>
<P>The beam expression can be any valid Python expression (all functions from the
math module are available). The variables 'r' and 'fq' refer to the source distance
from field centre (in radians) and reference frequency (in GHz), respectively.</P>
<P>If your LSM uses apparent rather than intrinsic fluxes, or you don't need to sort
the sources by apparent flux, set this option to 'None'.</P>""");
self._compile_opts.append(beam_opt);
subset_doc = """<P>Selects a subset of sources from the
LSM. You may specify sources:</P>
<P>* by name</P>
<P>* by ordinal number (from 0, in order of decreasing brightness)</P>
<P>* as ranges, e.g. "M:N" (M to N inclusive), or ":M" (0 to M), or "N:" (N to last).
<P>Prefixing a name or a number or a range by "-" excludes that source from the selection.</P>
<P>Examples: "-foo" (all sources except 'foo'), "0 3:5 bar" (sources #0,3,4,5 and 'bar'),
"-3:5 -foo" (all sources except 3,4,5 and 'foo'.)</P>""";
subset_opt = TDLOption('lsm_subset',"Use subset of LSM sources",
["all"],more=str,namespace=self,doc=subset_doc);
self._subset_parser = Meow.OptionTools.ListOptionParser(minval=0,name="source");
subset_opt.set_validator(self._subset_parser.validator);
self._compile_opts.append(subset_opt);
solve_subset_opt = TDLOption("solve_subset","For which sources",["all"],
more=str,namespace=self,doc=subset_doc);
self._solve_subset_parser = Meow.OptionTools.ListOptionParser(minval=0,name="source");
self._compile_opts.append(
TDLMenu("Make solvable source parameters",
solve_subset_opt,
TDLOption("solve_I","I",False,namespace=self),
TDLOption("solve_Q","Q",False,namespace=self),
TDLOption("solve_U","U",False,namespace=self),
TDLOption("solve_V","V",False,namespace=self),
TDLOption("solve_spi","spectral index",False,namespace=self),
TDLOption("solve_pos","position",False,namespace=self),
TDLOption("solve_RM","rotation measure",False,namespace=self),
TDLOption("solve_shape","shape (for extended sources)",False,namespace=self),
toggle='solvable_sources',namespace=self,
));
save_opt = TDLMenu("Save LSM in native format",toggle="save_native",default=False,namespace=self,
*( TDLOption("save_native_filename","Filename",
TDLFileSelect("*.lsm",exist=False),
namespace=self),));
self._compile_opts.append(save_opt);
save_txt_opt = TDLMenu("Save LSM in text (hms/dms) format",toggle="save_text",
default=False,namespace=self,
*( TDLOption("save_text","Filename",False,namespace=self),));
self._compile_opts.append(save_txt_opt);
def _select_format (format):
if format == NATIVE:
save_opt.set_value(False,save=False);
format_opt.when_changed(_select_format);
# self._compile_opts += [
# TDLOption("show_gui","Show LSM GUI",False,namespace=self)
# ];
return self._compile_opts;
def runtime_options (self):
"""Makes and returns list of compile-time options""";
# no runtime options, for now
return self._runtime_opts;
def load (self,ns,filename=None,format=None):
"""Loads LSM file. Filename/format arguments may be used to override those
specified in the constructor or via options""";
filename = filename or self.filename;
format = format or self.format;
self.lsm = LSMClass();
# set up table of format readers
# all are expected to take an lsm object (e.g. self) as arg 1,
# a filename as arg2, and a node scope as arg3
FORMAT_READERS = {};
FORMAT_READERS[NATIVE] = LSM.load;
FORMAT_READERS[NEWSTAR] = LSM.build_from_newstar;
FORMAT_READERS[NVSS] = LSM.build_from_catalog;
FORMAT_READERS[CLEAN] = LSM.build_from_complist;
FORMAT_READERS[TEXT_RAD] = LSM.build_from_extlist_rad;
FORMAT_READERS[TEXT_DMS] = LSM.build_from_extlist;
FORMAT_READERS[VIZIER] = LSM.build_from_vizier;
FORMAT_READERS[OR_GSM] = LSM.build_from_orgsm;
FORMAT_READERS[SKA] = LSM.build_from_ska;
# read LSM using the selected format reader
reader = FORMAT_READERS.get(format,None);
if reader is None:
raise TypeError,"Unknown LSM format '%s'"%format;
try:
reader(self.lsm,filename,ns);
except:
traceback.print_exc();
raise RuntimeError,"""There was an error reading the LSM file %s. Either the file format is set incorrectly, or the LSM file is corrupt."""%filename;
# save if needed
if self.save_native and self.save_native_filename:
self.lsm.save(self.save_native_filename);
# save if needed
if self.save_text and self.save_text_filename:
self.lsm.save_as_extlist(self.save_text_filename,ns,prefix='');
# if self.show_gui:
# self.lsm.display()
def source_list (self,ns,max_sources=None,**kw):
"""Reads LSM and returns a list of Meow objects.
ns is node scope in which they will be created.
Keyword arguments may be used to indicate which of the source attributes are to be
created as Parms, use e.g. I=Meow.Parm(tags="flux") for this.
The use_parms option may override this.
""";
if self.filename is None:
return [];
if self.lsm is None:
self.load(ns);
# all=1 returns unsorted list, so use a large count instead, to get a sorted list
plist = self.lsm.queryLSM(count=9999999);
# parse the beam expression
if self.beam_expr is not None:
try:
beam_func = eval("lambda r,fq:"+self.beam_expr);
except:
raise RuntimeError,"invalid beam expression";
else:
beam_func = None;
# make list of direction,punit,I,I_apparent tuples
parm = Meow.Parm(tags="source solvable");
srclist = [];
for pu in plist:
ra,dec,I,Q,U,V,spi,freq0,RM = pu.getEssentialParms(ns);
if self.solve_pos:
ra = parm.new(ra);
dec = parm.new(dec);
direction = Meow.Direction(ns,pu.name,ra,dec,static=not self.solve_pos);
Iapp = I;
if beam_func is not None:
# if phase centre is already set (i.e. static), then lmn will be computed here, and we
# can apply a beam expression
lmn = direction.lmn_static();
if lmn is not None:
r = sqrt(lmn[0]**2+lmn[1]**2);
Iapp = I*beam_func(r,freq0*1e-9 or 1.4); # use 1.4 GHz if ref frequency not specified
# append to list
srclist.append((pu.name,direction,pu,I,Iapp));
# sort list by decreasing apparent flux
srclist.sort(lambda a,b:cmp(b[4],a[4]));
srclist_full = srclist;
# extract active subset
srclist = self._subset_parser.apply(self.lsm_subset,srclist_full,names=[src[0] for src in srclist_full]);
# extract solvable subset
solve_subset = self._subset_parser.apply(self.solve_subset,srclist_full,names=[src[0] for src in srclist_full]);
solve_subset = set([src[0] for src in solve_subset]);
# make copy of kw dict to be used for sources not in solvable set
kw_nonsolve = dict(kw);
# and update kw dict to be used for sources in solvable set
if self.solvable_sources:
if self.solve_I:
kw.setdefault("I",parm);
if self.solve_Q:
kw.setdefault("Q",parm);
if self.solve_U:
kw.setdefault("U",parm);
if self.solve_V:
kw.setdefault("V",parm);
if self.solve_spi:
kw.setdefault("spi",parm);
if self.solve_RM:
kw.setdefault("RM",parm);
if self.solve_pos:
kw.setdefault("ra",parm);
kw.setdefault("dec",parm);
if self.solve_shape:
kw.setdefault("sx",parm);
kw.setdefault("sy",parm);
kw.setdefault("phi",parm);
# make Meow list
source_model = []
## Note: conversion from AIPS++ componentlist Gaussians to Gaussian Nodes
### eX, eY : multiply by 2
### eP: change sign
for name,direction,pu,I,Iapp in srclist:
# print "%-20s %12f %12f"%(pu.name,I,Iapp);
src = {};
( src['ra'],src['dec'],
src['I'],src['Q'],src['U'],src['V'],
src['spi'],src['freq0'],src['RM'] ) = pu.getEssentialParms(ns)
(eX,eY,eP) = pu.getExtParms()
# scale 2 difference
src['sx'] = eX*2
src['sy'] = eY*2
src['phi'] = -eP
# override zero values with None so that Meow can make smaller trees
if not src['RM']:
src['RM'] = None;
if not src['spi']:
src['spi'] = None;
if src['RM'] is None:
src['freq0'] = None;
## construct parms or constants for source attributes
## if source is in solvable set (solvable_source_set of None means all are solvable),
## use the kw dict, else use the nonsolve dict for source parameters
if name in solve_subset:
solvable = True;
kwdict = kw;
else:
solvable = False;
kwdict = kw_nonsolve;
for key,value in src.iteritems():
meowparm = kwdict.get(key);
if isinstance(meowparm,Meow.Parm):
src[key] = meowparm.new(value);
elif meowparm is not None:
src[key] = value;
if eX or eY or eP:
# Gaussians
if eY:
size,phi = [src['sx'],src['sy']],src['phi'];
else:
size,phi = src['sx'],None;
src = Meow.GaussianSource(ns,name=pu.name,
I=src['I'],Q=src['Q'],U=src['U'],V=src['V'],
direction=direction,
spi=src['spi'],freq0=src['freq0'],RM=src['RM'],
size=size,phi=phi);
else:
src = Meow.PointSource(ns,name=pu.name,
I=src['I'],Q=src['Q'],U=src['U'],V=src['V'],
direction=direction,
spi=src['spi'],freq0=src['freq0'],RM=src['RM']);
# check for beam LM
if pu._lm is not None:
src.set_attr('beam_lm',pu._lm);
src.solvable = solvable;
src.set_attr('Iapp',Iapp);
source_model.append(src);
return source_model;