def test_ion_to_name():
# Normal
ionnm = ions.ion_name((6,2))
assert ionnm == 'CII'
# Latex
ionnm = ions.ion_name((6,2),flg=1)
assert ionnm == '{\\rm C}^{+}'
def repr_vpfit(self,
b=10. * u.km / u.s,
tie_strs=('', '', ''),
fix_strs=('', '', '')):
"""
String representation for VPFIT (line fitting software) in its fort.26 format
Parameters
----------
b : Quantity, optional
Doppler parameter of the component. Default is 10*u.km/u.s
tie_strs : tuple of strings, optional
Strings to be used for tying parameters (z,b,logN),
respectively. These are all converted to lower case
format, following VPFIT convention.
fix_strs : tuple of strings, optional
Strings to be used for fixing parameters (z,b,logN),
respectively. These are all converted to upper case
format, following VPFIT convention. These will take
precedence over tie_strs if different than ''.
Returns
-------
repr_vpfit : str
"""
# get Doppler parameter to km/s
b = b.to('km/s').value
# Ion name
name = ions.ion_name(self.Zion, nspace=1)
name = name.replace(' ', '')
# Deal with fix and tie parameters
# Check format first
for i, x_strs in enumerate([tie_strs, fix_strs]):
if (not isinstance(x_strs, tuple)) or (not all(
isinstance(s, (str, basestring)) for s in x_strs)):
if i == 0:
raise TypeError('`tie_strs` must be a tuple of strings.')
elif i == 1:
raise TypeError('`fix_strs` must be a tuple of strings.')
if len(x_strs) != 3:
raise SyntaxError(
'`tie_strs` and `fix_strs` must have len() == 3')
# reformat for VPFIT standard
fix_strs = np.array([s.upper() for s in fix_strs])
tie_strs = np.array([s.lower() for s in tie_strs])
# preference to fix_strs over tie_strs
strs = np.where(fix_strs != '', fix_strs, tie_strs)
# create the line string
s = '{:s} {:.5f}{:s} {:.5f} {:.2f}{:s} {:.2f} {:.2f}{:s} {:.2f}'.format(
name, self.zcomp, strs[0], 0, b, strs[1], 0, self.logN, strs[2], 0)
if len(self.comment) > 0:
s += '! {:s}'.format(self.comment)
s += '\n'
return s
def repr_vpfit(self, b=10.*u.km/u.s, tie_strs=('', '', ''), fix_strs=('', '', '')):
"""
String representation for VPFIT (line fitting software) in its fort.26 format
Parameters
----------
b : Quantity, optional
Doppler parameter of the component. Default is 10*u.km/u.s
tie_strs : tuple of strings, optional
Strings to be used for tying parameters (z,b,logN),
respectively. These are all converted to lower case
format, following VPFIT convention.
fix_strs : tuple of strings, optional
Strings to be used for fixing parameters (z,b,logN),
respectively. These are all converted to upper case
format, following VPFIT convention. These will take
precedence over tie_strs if different than ''.
Returns
-------
repr_vpfit : str
"""
# get Doppler parameter to km/s
b = b.to('km/s').value
# Ion name
name = ions.ion_name(self.Zion, nspace=1)
name = name.replace(' ', '')
# Deal with fix and tie parameters
# Check format first
for i, x_strs in enumerate([tie_strs, fix_strs]):
if (not isinstance(x_strs, tuple)) or (not all(isinstance(s, (str, basestring)) for s in x_strs)):
if i == 0:
raise TypeError('`tie_strs` must be a tuple of strings.')
elif i == 1:
raise TypeError('`fix_strs` must be a tuple of strings.')
if len(x_strs) != 3:
raise SyntaxError('`tie_strs` and `fix_strs` must have len() == 3')
# reformat for VPFIT standard
fix_strs = np.array([s.upper() for s in fix_strs])
tie_strs = np.array([s.lower() for s in tie_strs])
# preference to fix_strs over tie_strs
strs = np.where(fix_strs != '', fix_strs, tie_strs)
# create the line string
s = '{:s} {:.5f}{:s} {:.5f} {:.2f}{:s} {:.2f} {:.2f}{:s} {:.2f}'.format(name, self.zcomp, strs[0], 0, b,
strs[1], 0, self.logN, strs[2], 0)
if len(self.comment) > 0:
s += '! {:s}'.format(self.comment)
s += '\n'
return s
def mk_json_ions(dlas, prefix, outfil):
""" Generate a JSON table of the Ion database
Parameters
----------
dlas : DLASurvey
prefix : str
outfil : str
Output JSON file
"""
# Sort
ra = dlas.coord.ra.degree[0]
srt = np.argsort(np.array(ra))
all_ions = {}
# Loop on DLA
for jj, isrt in enumerate(srt):
idla = dlas._abs_sys[isrt]
# Astropy Table
ion_tab = idla._ionN
# Convert key to standard names
new_dict = {}
for row in ion_tab:
Zion = (row['Z'], row['ion'])
# Skip HI
if Zion == (1, 1):
continue
# Get name
new_key = ltai.ion_name(Zion)
# Fine structure?
if row['Ej'] > 0.:
new_key = new_key + '*'
new_dict[new_key] = dict(zip(row.dtype.names, row))
# Write to all_ions
name = survey_name(prefix, idla)
all_ions[name] = new_dict
# Write
print('Writing {:s}'.format(outfil))
with io.open(outfil, 'w', encoding='utf-8') as f:
f.write(
unicode(
json.dumps(all_ions,
sort_keys=True,
indent=4,
separators=(',', ': '))))
# Return
return all_ions
def table_from_complist(complist):
"""
Returns a astropy.Table from an input list of AbsComponents. It only
fills in mandatory and special attributes (see notes below).
Information stored in dictionary AbsComp.attrib is ignored.
Parameters
----------
complist : list of AbsComponents
The initial list of AbsComponents to create the QTable from.
Returns
-------
table : Table
Table from the information contained in each component.
Notes
-----
Mandatory columns: 'RA', 'DEC', 'ion_name', 'z_comp', 'vmin', 'vmax'
Special columns: 'name', 'comment', 'logN', 'sig_logN', 'flag_logN'
See also complist_from_table()
"""
tab = Table()
# mandatory columns
tab['RA'] = [comp.coord.ra.to('deg').value for comp in complist] * u.deg
tab['DEC'] = [comp.coord.dec.to('deg').value for comp in complist] * u.deg
ion_names = [] # ion_names
for comp in complist:
if comp.Zion == (-1, -1):
ion_names += ["Molecule"]
else:
ion_names += [ion_name(comp.Zion)]
tab['ion_name'] = ion_names
tab['z_comp'] = [comp.zcomp for comp in complist]
tab['vmin'] = [comp.vlim[0].value for comp in complist] * comp.vlim.unit
tab['vmax'] = [comp.vlim[1].value for comp in complist] * comp.vlim.unit
# Special columns
tab['logN'] = [comp.logN for comp in complist]
tab['sig_logN'] = [comp.sig_logN for comp in complist]
tab['flag_logN'] = [comp.flag_N for comp in complist]
tab['comment'] = [comp.comment for comp in complist]
tab['name'] = [comp.name for comp in complist]
return tab
def mk_json_ions(dlas, prefix, outfil):
""" Generate a JSON table of the Ion database
Parameters
----------
dlas : DLASurvey
prefix : str
outfil : str
Output JSON file
"""
# Sort
ra = dlas.coord.ra.degree[0]
srt = np.argsort(np.array(ra))
all_ions = {}
# Loop on DLA
for jj, isrt in enumerate(srt):
idla = dlas._abs_sys[isrt]
# Astropy Table
ion_tab = idla._ionN
# Convert key to standard names
new_dict = {}
for row in ion_tab:
Zion = (row['Z'], row['ion'])
# Skip HI
if Zion == (1,1):
continue
# Get name
new_key = ltai.ion_name(Zion)
# Fine structure?
if row['Ej'] > 0.:
new_key = new_key+'*'
new_dict[new_key] = dict(zip(row.dtype.names, row))
# Write to all_ions
name = survey_name(prefix, idla)
all_ions[name] = new_dict
# Write
print('Writing {:s}'.format(outfil))
with io.open(outfil, 'w', encoding='utf-8') as f:
f.write(unicode(json.dumps(all_ions, sort_keys=True, indent=4,
separators=(',', ': '))))
# Return
return all_ions
def test_ion_to_name():
# Normal
ionnm = ions.ion_name((6, 2))
assert ionnm == 'CII'
# Latex
ionnm = ions.ion_name((6, 2), flg=1)
assert ionnm == '{\\rm C}^{+}'
# as dict
ion = dict(ion=2, Z=6)
ionnm = ions.ion_name(ion)
assert ionnm == 'CII'
# latex not ready yet
with pytest.raises(ValueError):
ionnm = ions.ion_name((6, 0), flg=1)
for ii in [1, 2, 3, 4]:
ionnm = ions.ion_name((6, ii), flg=1)
# bad flag
with pytest.raises(ValueError):
ionnm = ions.ion_name((6, 2), flg=99)
def test_ion_to_name():
# Normal
ionnm = ions.ion_name((6,2))
assert ionnm == 'CII'
# Latex
ionnm = ions.ion_name((6,2), flg=1)
assert ionnm == '{\\rm C}^{+}'
# as dict
ion = dict(ion=2, Z=6)
ionnm = ions.ion_name(ion)
assert ionnm == 'CII'
# latex not ready yet
with pytest.raises(ValueError):
ionnm = ions.ion_name((6,0), flg=1)
for ii in [1,2,3,4]:
ionnm = ions.ion_name((6,ii), flg=1)
# bad flag
with pytest.raises(ValueError):
ionnm = ions.ion_name((6,2), flg=99)
def repr_alis(self, T_kin=1e4*u.K, bturb=0.*u.km/u.s,
tie_strs=('', '', '', ''), fix_strs=('', '', '', '')):
"""
String representation for ALIS (line fitting software)
Parameters
----------
T_kin : Quantity, optional
Kinetic temperature. Default 1e4*u.K
bturb : Quantity, optional
Turbulent Doppler parameter. Default 0.*u.km/u.s
tie_strs : tuple of strings, optional
Strings to be used for tying parameters
(logN,z,bturb,T_kin), respectively. These are all
converted to lower case format, following ALIS convention.
fix_strs : tuple of strings, optional
Strings to be used for fixing parameters
(logN,z,bturb,T_kin), respectively. These are all
converted to upper case format, following ALIS convention.
These will take precedence over tie_strs if different from
''.
Returns
-------
repr_alis : str
"""
# Convert to the units ALIS wants
T_kin = T_kin.to('K').value
bturb = bturb.to('km/s').value
# A patch for nucleons; todo: come up with a better way to do this using ELEMENTS?
if self.Zion[0] == 1:
nucleons = 1
elif self.Zion[0] > 1:
nucleons = 2 * self.Zion[0]
# name
name = ions.ion_name(self.Zion, nspace=1)
name = '{}'.format(nucleons)+name.replace(' ', '_')
# Deal with fix and tie parameters
# Check format first
for i, x_strs in enumerate([tie_strs, fix_strs]):
if (not isinstance(x_strs, tuple)) or (not all(isinstance(s, (str, basestring)) for s in x_strs)):
if i == 0:
raise TypeError('`tie_strs` must be a tuple of strings.')
elif i == 1:
raise TypeError('`fix_strs` must be a tuple of strings.')
if len(x_strs) != 4:
raise SyntaxError('`tie_strs` and `fix_strs` must have len()== 4')
# reformat for ALIS standard
fix_strs = np.array([s.upper() for s in fix_strs])
tie_strs = np.array([s.lower() for s in tie_strs])
# preference to fix_strs over tie_strs
strs = np.where(fix_strs != '', fix_strs, tie_strs)
s = 'voigt ion={:s} {:.2f}{:s} redshift={:.5f}{:s} {:.1f}{:s} {:.1E}{:s}'.format(name, self.logN, strs[0],
self.zcomp, strs[1], bturb,
strs[2], T_kin, strs[3])
if len(self.comment) > 0:
s += '# {:s}'.format(self.comment)
s += '\n'
return s
def __init__(self, radec, Zion, zcomp, vlim, Ej=0./u.cm, A=None,
Ntup=None, comment='', name=None, stars=None):
""" Initiator
Parameters
----------
radec : tuple or SkyCoord
(RA,DEC) in deg or astropy.coordinate
Zion : tuple
Atomic number, ion -- (int,int)
e.g. (8,1) for OI
zcomp : float
Absorption component redshift
vlim : Quantity array
Velocity limits of the component w/r to `z`
e.g. [-300,300]*u.km/u.s
A : int, optional
Atomic mass -- used to distinguish isotopes
Ntup : tuple
(int,float,float)
(flag_N,logN,sig_N)
flag_N : Flag describing N measurement
logN : log10 N column density
sig_logN : Error in log10 N
Ej : Quantity, optional
Energy of lower level (1/cm)
stars : str, optional
asterisks to add to name, e.g. '**' for CI**
Required if name=None and Ej>0.
comment : str, optional
A comment, default is ``
"""
# Required
if isinstance(radec, (tuple)):
self.coord = SkyCoord(ra=radec[0], dec=radec[1])
elif isinstance(radec, SkyCoord):
self.coord = radec
self.Zion = Zion
self.zcomp = zcomp
self.vlim = vlim
# Optional
self.A = A
self.Ej = Ej
self.comment = comment
if Ntup is not None:
self.flag_N = Ntup[0]
self.logN = Ntup[1]
self.sig_logN = Ntup[2]
_, _ = ltaa.linear_clm(self) # Set linear quantities
else:
self.flag_N = 0
self.logN = 0.
self.sig_logN = 0.
# Name
if name is None:
iname = ions.ion_name(self.Zion, nspace=0)
if self.Ej.value > 0: # Need to put *'s in name
try:
iname += stars
except:
raise IOError("Need to provide 'stars' parameter.")
self.name = '{:s}_z{:0.5f}'.format(iname, self.zcomp)
else:
self.name = name
# Other
self._abslines = []
def add_abslines_from_linelist(self, llist='ISM', wvlim=None, min_Wr=None, **kwargs):
"""
It adds associated AbsLines satisfying some conditions (see parameters below).
Parameters
----------
llist : str
Name of the linetools.lists.linelist.LineList
object where to look for the transition names.
Default is 'ISM', which means the function looks
within `list = LineList('ISM')`.
wvlims : Quantity array, optional
Observed wavelength limits for AbsLines to be added.
e.g. [1200, 2000]*u.AA.
min_Wr : Quantity, optional
Minimum rest-frame equivalent with for AbsLines to be added.
This is calculated in the very low optical depth regime tau0<<1,
where Wr is independent of Doppler parameter or gamma (see eq. 9.15 of
Draine 2011). Still, a column density attribute for the AbsComponent
is needed.
Returns
-------
Adds AbsLine objects to the AbsComponent._abslines list.
Notes
-----
**kwargs are passed to AbsLine.add_absline() method.
"""
# get the transitions from LineList
llist = LineList(llist)
name = ions.ion_name(self.Zion, nspace=0)
transitions = llist.all_transitions(name)
# unify output to be always QTable
if isinstance(transitions, dict):
transitions = llist.from_dict_to_qtable(transitions)
# check wvlims
if wvlim is not None:
cond = (transitions['wrest']*(1+self.zcomp) >= wvlim[0]) & \
(transitions['wrest']*(1+self.zcomp) <= wvlim[1])
transitions = transitions[cond]
# check outputs
if len(transitions) == 0:
warnings.warn("No transitions satisfying the criteria found. Doing nothing.")
return
# loop over the transitions when more than one found
for transition in transitions:
iline = AbsLine(transition['name'], z=self.zcomp)
iline.limits.set(self.vlim)
iline.attrib['coord'] = self.coord
iline.attrib['logN'] = self.logN
iline.attrib['sig_logN'] = self.sig_logN
iline.attrib['flag_N'] = self.flag_N
iline.attrib['N'] = 10**iline.attrib['logN'] / (u.cm * u.cm)
iline.attrib['sig_N'] = 10**iline.attrib['sig_logN'] / (u.cm * u.cm)
for key in self.attrib.keys():
iline.attrib[key] = self.attrib[key]
if min_Wr is not None:
# check logN is defined
logN = self.logN
if logN == 0:
warnings.warn("AbsComponent does not have logN defined. Appending AbsLines "
"regardless of min_Wr.")
else:
N = 10**logN / (u.cm*u.cm)
Wr_iline = iline.get_Wr_from_N(N=N) # valid for the tau0<<1 regime.
if Wr_iline < min_Wr: # do not append
continue
# add the absline
self.add_absline(iline)
def __init__(self, radec, Zion, zcomp, vlim, Ej=0./u.cm, A=None,
Ntup=None, comment='', name=None, stars=None):
""" Initiator
Parameters
----------
radec : tuple or SkyCoord
(RA,DEC) in deg or astropy.coordinate.SkyCoord
Zion : tuple
Atomic number, ion -- (int,int)
e.g. (8,1) for OI
Note: (-1, -1) is special and is meant for moleculer (e.g. H2)
This notation will most likely change in the future.
zcomp : float
Absorption component redshift
vlim : Quantity array
Velocity limits of the component w/r to `z`
e.g. [-300,300]*u.km/u.s
A : int, optional
Atomic mass -- used to distinguish isotopes
Ntup : tuple
(int,float,float)
(flag_N,logN,sig_logN)
flag_N : Flag describing N measurement (0: no info; 1: detection; 2: saturated; 3: non-detection)
logN : log10 N column density
sig_logN : Error in log10 N
# TODO FUTURE IMPLEMENTATION WILL ALLOW FOR 2-element ndarray for sig_logN
Ej : Quantity, optional
Energy of lower level (1/cm)
stars : str, optional
asterisks to add to name, e.g. '**' for CI**
Required if name=None and Ej>0.
comment : str, optional
A comment, default is ``
"""
# Required
self.coord = ltu.radec_to_coord(radec)
self.Zion = Zion
self.zcomp = zcomp
self.vlim = vlim
# Optional
self.A = A
self.Ej = Ej
self.comment = comment
if Ntup is not None:
self.flag_N = Ntup[0]
self.logN = Ntup[1]
self.sig_logN = Ntup[2]
_, _ = ltaa.linear_clm(self) # Set linear quantities
else:
self.flag_N = 0
self.logN = 0.
self.sig_logN = 0.
# Name
if (name is None) and (self.Zion != (-1, -1)):
iname = ions.ion_name(self.Zion, nspace=0)
if self.Ej.value > 0: # Need to put *'s in name
try:
iname += stars
except:
raise IOError("Need to provide 'stars' parameter.")
self.name = '{:s}_z{:0.5f}'.format(iname, self.zcomp)
elif (name is None) and (self.Zion == (-1, -1)):
self.name = 'mol_z{:0.5f}'.format(self.zcomp)
else:
self.name = name
# Potential for attributes
self.attrib = dict()
# Other
self._abslines = []
def repr_alis(self,
T_kin=1e4 * u.K,
bturb=0. * u.km / u.s,
tie_strs=('', '', '', ''),
fix_strs=('', '', '', '')):
"""
String representation for ALIS (line fitting software)
Parameters
----------
T_kin : Quantity, optional
Kinetic temperature. Default 1e4*u.K
bturb : Quantity, optional
Turbulent Doppler parameter. Default 0.*u.km/u.s
tie_strs : tuple of strings, optional
Strings to be used for tying parameters
(logN,z,bturb,T_kin), respectively. These are all
converted to lower case format, following ALIS convention.
fix_strs : tuple of strings, optional
Strings to be used for fixing parameters
(logN,z,bturb,T_kin), respectively. These are all
converted to upper case format, following ALIS convention.
These will take precedence over tie_strs if different from
''.
Returns
-------
repr_alis : str
"""
# Convert to the units ALIS wants
T_kin = T_kin.to('K').value
bturb = bturb.to('km/s').value
# A patch for nucleons; todo: come up with a better way to do this using ELEMENTS?
if self.Zion[0] == 1:
nucleons = 1
elif self.Zion[0] > 1:
nucleons = 2 * self.Zion[0]
# name
name = ions.ion_name(self.Zion, nspace=1)
name = '{}'.format(nucleons) + name.replace(' ', '_')
# Deal with fix and tie parameters
# Check format first
for i, x_strs in enumerate([tie_strs, fix_strs]):
if (not isinstance(x_strs, tuple)) or (not all(
isinstance(s, (str, basestring)) for s in x_strs)):
if i == 0:
raise TypeError('`tie_strs` must be a tuple of strings.')
elif i == 1:
raise TypeError('`fix_strs` must be a tuple of strings.')
if len(x_strs) != 4:
raise SyntaxError(
'`tie_strs` and `fix_strs` must have len()== 4')
# reformat for ALIS standard
fix_strs = np.array([s.upper() for s in fix_strs])
tie_strs = np.array([s.lower() for s in tie_strs])
# preference to fix_strs over tie_strs
strs = np.where(fix_strs != '', fix_strs, tie_strs)
s = 'voigt ion={:s} {:.2f}{:s} redshift={:.5f}{:s} {:.1f}{:s} {:.1E}{:s}'.format(
name, self.logN, strs[0], self.zcomp, strs[1], bturb, strs[2],
T_kin, strs[3])
if len(self.comment) > 0:
s += '# {:s}'.format(self.comment)
s += '\n'
return s
def add_abslines_from_linelist(self,
llist='ISM',
init_name=None,
wvlim=None,
min_Wr=None,
**kwargs):
"""
It adds associated AbsLines satisfying some conditions (see parameters below).
Parameters
----------
llist : str, optional
Name of the linetools.lists.linelist.LineList
object where to look for the transition names.
Default is 'ISM', which means the function looks
within `list = LineList('ISM')`.
init_name : str, optional
Name of the initial transition used to define the AbsComponent
wvlims : Quantity array, optional
Observed wavelength limits for AbsLines to be added.
e.g. [1200, 2000]*u.AA.
min_Wr : Quantity, optional
Minimum rest-frame equivalent with for AbsLines to be added.
This is calculated in the very low optical depth regime tau0<<1,
where Wr is independent of Doppler parameter or gamma (see eq. 9.15 of
Draine 2011). Still, a column density attribute for the AbsComponent
is needed.
Returns
-------
Adds AbsLine objects to the AbsComponent._abslines list.
Notes
-----
**kwargs are passed to AbsLine.add_absline() method.
"""
# get the transitions from LineList
llist = LineList(llist)
if init_name is None: # we have to guess it
if (self.Zion) == (-1, -1): # molecules
# init_name must be in self.attrib (this is a patch)
init_name = self.attrib['init_name']
else: # atoms
init_name = ions.ion_name(self.Zion, nspace=0)
transitions = llist.all_transitions(init_name)
# unify output to be always QTable
if isinstance(transitions, dict):
transitions = llist.from_dict_to_qtable(transitions)
# check wvlims
if wvlim is not None:
cond = (transitions['wrest']*(1+self.zcomp) >= wvlim[0]) & \
(transitions['wrest']*(1+self.zcomp) <= wvlim[1])
transitions = transitions[cond]
# check outputs
if len(transitions) == 0:
warnings.warn(
"No transitions satisfying the criteria found. Doing nothing.")
return
# loop over the transitions when more than one found
for transition in transitions:
iline = AbsLine(transition['name'], z=self.zcomp, linelist=llist)
iline.limits.set(self.vlim)
iline.attrib['coord'] = self.coord
iline.attrib['logN'] = self.logN
iline.attrib['sig_logN'] = self.sig_logN
iline.attrib['flag_N'] = self.flag_N
iline.attrib['N'] = 10**iline.attrib['logN'] / (u.cm * u.cm)
iline.attrib['sig_N'] = 10**iline.attrib['sig_logN'] / (u.cm *
u.cm)
for key in self.attrib.keys():
iline.attrib[key] = self.attrib[key]
if min_Wr is not None:
# check logN is defined
logN = self.logN
if logN == 0:
warnings.warn(
"AbsComponent does not have logN defined. Appending AbsLines "
"regardless of min_Wr.")
else:
N = 10**logN / (u.cm * u.cm)
Wr_iline = iline.get_Wr_from_N(
N=N) # valid for the tau0<<1 regime.
if Wr_iline < min_Wr: # do not append
continue
# add the absline
self.add_absline(iline)
def __init__(self,
radec,
Zion,
zcomp,
vlim,
Ej=0. / u.cm,
A=None,
Ntup=None,
comment='',
name=None,
stars=None):
""" Initiator
Parameters
----------
radec : tuple or SkyCoord
(RA,DEC) in deg or astropy.coordinate.SkyCoord
Zion : tuple
Atomic number, ion -- (int,int)
e.g. (8,1) for OI
Note: (-1, -1) is special and is meant for moleculer (e.g. H2)
This notation will most likely change in the future.
zcomp : float
Absorption component redshift
vlim : Quantity array
Velocity limits of the component w/r to `z`
e.g. [-300,300]*u.km/u.s
A : int, optional
Atomic mass -- used to distinguish isotopes
Ntup : tuple
(int,float,float)
(flag_N,logN,sig_logN)
flag_N : Flag describing N measurement (0: no info; 1: detection; 2: saturated; 3: non-detection)
logN : log10 N column density
sig_logN : Error in log10 N
Ej : Quantity, optional
Energy of lower level (1/cm)
stars : str, optional
asterisks to add to name, e.g. '**' for CI**
Required if name=None and Ej>0.
comment : str, optional
A comment, default is ``
"""
# Required
self.coord = ltu.radec_to_coord(radec)
self.Zion = Zion
self.zcomp = zcomp
self.vlim = vlim
# Optional
self.A = A
self.Ej = Ej
self.comment = comment
if Ntup is not None:
self.flag_N = Ntup[0]
self.logN = Ntup[1]
self.sig_logN = Ntup[2]
_, _ = ltaa.linear_clm(self) # Set linear quantities
else:
self.flag_N = 0
self.logN = 0.
self.sig_logN = 0.
# Name
if (name is None) and (self.Zion != (-1, -1)):
iname = ions.ion_name(self.Zion, nspace=0)
if self.Ej.value > 0: # Need to put *'s in name
try:
iname += stars
except:
raise IOError("Need to provide 'stars' parameter.")
self.name = '{:s}_z{:0.5f}'.format(iname, self.zcomp)
elif (name is None) and (self.Zion == (-1, -1)):
self.name = 'mol_z{:0.5f}'.format(self.zcomp)
else:
self.name = name
# Potential for attributes
self.attrib = dict()
# Other
self._abslines = []
