class RSSModel(Spectrograph):
"""A model describing the RSS spectrograph"""
def __init__(self,
grating_name='None',
gratang=45,
camang=45,
slit=1.0,
xbin=2,
ybin=2,
xpos=-0.2666,
ypos=0.0117,
wavelength=None):
# set up the parts of the grating
self.grating_name = grating_name
self.slitang = slit
# set the telescope
self.set_telescope('RSS')
# set the collimator
self.set_collimator('RSS')
# set the camera
self.set_camera('RSS', wavelength=wavelength)
# set the detector
self.set_detector('RSS', xbin=xbin, ybin=ybin, xpos=xpos, ypos=ypos)
# set up the grating
self.set_grating(self.grating_name)
# set up the slit
self.set_slit(self.slitang)
# set up the grating angle
self.gratang = gratang
self.camang = camang
def alpha(self, da=0.23):
"""Return the value of alpha for the spectrograph"""
return self.gratang + da
def beta(self, mF=4.2e-5, db=0.00):
"""Return the value of beta for the spectrograph
Beta_o=(1+fA)*(camang)-gratang+beta_o
"""
return (1 + mF) * self.camang - self.alpha() + db
def focallength(self, focallength=328.0, wavelength=None):
"""The camera focal lenght set oaccording to the following
Wavelength should be provided in angstroms
"""
if wavelength is None:
return focallength
L = (wavelength - 4000.0) / 1000.0
return 327.66 + -0.1861 * L + 0.5061 * L**2 + -0.2100 * L**3 + 0.0365 * L**4 + -0.0023 * L**5
def get_wavelength(self, xarr, gamma=0.0):
"""For a given spectrograph configuration, return the wavelength coordinate
associated with a pixel coordinate.
xarr: 1-D Array of pixel coordinates
gamma: Value of gamma for the row being analyzed
returns an array of wavelengths in mm
"""
d = self.detector.xbin * self.detector.pix_size * (
xarr - self.detector.get_xpixcenter())
dbeta = -np.degrees(np.arctan(d / self.camera.focallength))
return self.calc_wavelength(self.alpha(),
-self.beta() + dbeta,
gamma=gamma)
def set_telescope(self, name='RSS'):
if name == 'RSS':
self.telescope = Optics(name=name, focallength=46200.0)
elif name == 'SALT':
self.telescope = Optics(name=name, focallength=46200.0)
else:
raise RSSError('%s is not a supported Telescope' % name)
def set_collimator(self, name='RSS', focallength=630.0):
if name == 'RSS':
self.collimator = Optics(name=name, focallength=focallength)
else:
raise RSSError('%s is not a supported collimator' % name)
def set_camera(self, name='RSS', wavelength=None):
if name == 'RSS':
self.camera = Optics(name=name, focallength=self.focallength())
else:
raise RSSError('%s is not a supported camera' % name)
def set_detector(self,
name='RSS',
geom=None,
xbin=2,
ybin=2,
xpos=0,
ypos=0):
if name == 'RSS':
if geom:
pass
else:
# version 1
# ccd1=Spectrograph.CCD(name='CCD1', xpix=2032, ypix=4102, pix_size=0.015, xpos=-32.19, ypos=0)
# updated on 20120325
ccd1 = CCD(name='CCD1',
xpix=2032,
ypix=4102,
pix_size=0.015,
xpos=-32.40,
ypos=0.0486)
ccd2 = CCD(name='CCD1',
xpix=2032,
ypix=4102,
pix_size=0.015,
xpos=0,
ypos=0)
ccd3 = CCD(name='CCD1',
xpix=2032,
ypix=4102,
pix_size=0.015,
xpos=32.218,
ypos=0.0196)
self.detector = Detector(name=name,
ccd=[ccd1, ccd2, ccd3],
xbin=xbin,
ybin=ybin,
xpos=xpos,
ypos=ypos,
plate_scale=0.224)
else:
raise RSSError('%s is not a supported detector' % name)
def set_grating(self, name=None):
if name == 'PG0300':
self.grating = Grating(name='PG0300', spacing=300)
elif name == 'PG0900':
self.grating = Grating(name='PG0900', spacing=903.20)
elif name == 'PG1300':
self.grating = Grating(name='PG1300', spacing=1301.20)
elif name == 'PG1800':
self.grating = Grating(name='PG1800', spacing=1801.65)
elif name == 'PG2300':
self.grating = Grating(name='PG2300', spacing=2302.15)
elif name == 'PG3000':
self.grating = Grating(name='PG3000', spacing=2999.98)
else:
raise RSSError('%s is not a supported RSS grating' % name)
def set_slit(self, slitang=1.0):
self.slit = Slit(name='LongSlit', phi=slitang)
self.slit.width = self.slit.calc_width(self.telescope.focallength)
def set_slit(self, slitang=1.0):
self.slit = Slit(name='LongSlit', phi=slitang)
self.slit.width = self.slit.calc_width(self.telescope.focallength)
class RSSModel (Spectrograph):
"""A model describing the RSS spectrograph"""
def __init__(self, grating_name='None', gratang=45, camang=45, slit=1.0,
xbin=2, ybin=2, xpos=-0.2666, ypos=0.0117, wavelength=None):
# set up the parts of the grating
self.grating_name = grating_name
self.slitang = slit
# set the telescope
self.set_telescope('RSS')
# set the collimator
self.set_collimator('RSS')
# set the camera
self.set_camera('RSS', wavelength=wavelength)
# set the detector
self.set_detector('RSS', xbin=xbin, ybin=ybin, xpos=xpos, ypos=ypos)
# set up the grating
self.set_grating(self.grating_name)
# set up the slit
self.set_slit(self.slitang)
# set up the grating angle
self.gratang = gratang
self.camang = camang
def alpha(self, da=0.23):
"""Return the value of alpha for the spectrograph"""
return self.gratang + da
def beta(self, mF=4.2e-5, db=0.00):
"""Return the value of beta for the spectrograph
Beta_o=(1+fA)*(camang)-gratang+beta_o
"""
return (1 + mF) * self.camang - self.alpha() + db
def focallength(self, focallength=328.0, wavelength=None):
"""The camera focal lenght set oaccording to the following
Wavelength should be provided in angstroms
"""
if wavelength is None:
return focallength
L = (wavelength - 4000.0) / 1000.0
return 327.66 + -0.1861 * L + 0.5061 * L ** 2 + -0.2100 * L ** 3 + 0.0365 * L ** 4 + -0.0023 * L ** 5
def get_wavelength(self, xarr, gamma=0.0):
"""For a given spectrograph configuration, return the wavelength coordinate
associated with a pixel coordinate.
xarr: 1-D Array of pixel coordinates
gamma: Value of gamma for the row being analyzed
returns an array of wavelengths in mm
"""
d = self.detector.xbin * self.detector.pix_size * (xarr - self.detector.get_xpixcenter())
dbeta = -np.degrees(np.arctan(d / self.camera.focallength))
return self.calc_wavelength(self.alpha(), -self.beta() + dbeta, gamma=gamma)
def set_telescope(self, name='RSS'):
if name == 'RSS':
self.telescope = Optics(name=name, focallength=46200.0)
elif name == 'SALT':
self.telescope = Optics(name=name, focallength=46200.0)
else:
raise RSSError('%s is not a supported Telescope' % name)
def set_collimator(self, name='RSS', focallength=630.0):
if name == 'RSS':
self.collimator = Optics(name=name, focallength=focallength)
else:
raise RSSError('%s is not a supported collimator' % name)
def set_camera(self, name='RSS', wavelength=None):
if name == 'RSS':
self.camera = Optics(name=name, focallength=self.focallength())
else:
raise RSSError('%s is not a supported camera' % name)
def set_detector(self, name='RSS', geom=None, xbin=2, ybin=2, xpos=0, ypos=0):
if name == 'RSS':
if geom:
pass
else:
# version 1
#ccd1=Spectrograph.CCD(name='CCD1', xpix=2032, ypix=4102, pix_size=0.015, xpos=-32.19, ypos=0)
# updated on 20120325
ccd1 = CCD(name='CCD1', xpix=2032, ypix=4102, pix_size=0.015, xpos=-32.40, ypos=0.0486)
ccd2 = CCD(name='CCD1', xpix=2032, ypix=4102, pix_size=0.015, xpos=0, ypos=0)
ccd3 = CCD(name='CCD1', xpix=2032, ypix=4102, pix_size=0.015, xpos=32.218, ypos=0.0196)
self.detector = Detector(name=name, ccd=[ccd1, ccd2, ccd3], xbin=xbin, ybin=ybin,
xpos=xpos, ypos=ypos, plate_scale=0.224)
else:
raise RSSError('%s is not a supported detector' % name)
def set_grating(self, name=None):
if name == 'PG0300':
self.grating = Grating(name='PG0300', spacing=300)
elif name == 'PG0900':
self.grating = Grating(name='PG0900', spacing=903.20)
elif name == 'PG1300':
self.grating = Grating(name='PG1300', spacing=1301.20)
elif name == 'PG1800':
self.grating = Grating(name='PG1800', spacing=1801.65)
elif name == 'PG2300':
self.grating = Grating(name='PG2300', spacing=2302.15)
elif name == 'PG3000':
self.grating = Grating(name='PG3000', spacing=2999.98)
else:
raise RSSError('%s is not a supported RSS grating' % name)
def set_slit(self, slitang=1.0):
self.slit = Slit(name='LongSlit', phi=slitang)
self.slit.width = self.slit.calc_width(self.telescope.focallength)
def set_slit(self, slitang=1.0):
self.slit = Slit(name='LongSlit', phi=slitang)
self.slit.width = self.slit.calc_width(self.telescope.focallength)
class HRSModel (Spectrograph):
"""HRSModel is a class that describes the High Resolution Specotrgraph on SALT
"""
def __init__(self, grating_name='hrs', camera_name='hrdet', slit=2.0, \
order=83, gamma=None, xbin=1, ybin=1, xpos=0.00, ypos=0.00):
#set up the parts of the grating
self.grating_name=grating_name
#set the telescope
self.set_telescope('SALT')
#set the collimator
self.set_collimator('hrs')
#set the camera
self.set_camera(camera_name)
#set the detector
self.set_detector(camera_name, xbin=xbin, ybin=ybin, xpos=xpos, ypos=ypos)
#set up the grating
self.set_grating(self.grating_name, order=order)
#set up the slit
self.set_slit(slit)
#set up the grating angle
if gamma is not None:
self.gamma=gamma
def alpha(self, da=0.00):
"""Return the value of alpha for the spectrograph"""
return self.grating.blaze+self.gamma
def beta(self, db=0):
"""Return the value of beta for the spectrograph
Beta_o=(1+fA)*(camang)-gratang+beta_o
"""
return self.grating.blaze-self.gamma+db
def get_wavelength(self, xarr, gamma=0.0):
"""For a given spectrograph configuration, return the wavelength coordinate
associated with a pixel coordinate.
xarr: 1-D Array of pixel coordinates
gamma: Value of gamma for the row being analyzed
returns an array of wavelengths in mm
"""
d=self.detector.xbin*self.detector.pix_size*(xarr-self.detector.get_xpixcenter())
dbeta=np.degrees(np.arctan(d/self.camera.focallength))
return self.calc_wavelength(self.alpha(), -self.beta()+dbeta, gamma=gamma)
def set_telescope(self, name='SALT'):
if name=='SALT':
self.telescope=Optics(name=name, focallength=46200.0)
else:
raise SpectrographError('%s is not a supported Telescope' % name)
def set_collimator(self, name='hrs', focallength=2000.0):
if name=='hrs':
self.collimator=Optics(name=name, focallength=focallength)
else:
raise SpectrographError('%s is not a supported collimator' % name)
def set_camera(self, name='hrdet', focallength=None):
if name=='hrdet':
self.camera=Optics(name=name, focallength=402.26)
self.gamma = 2.43
elif name=='hbdet':
self.camera=Optics(name=name, focallength=333.6)
self.gamma = 2.00
else:
raise SpectrographError('%s is not a supported camera' % name)
def set_detector(self, name='hrdet', geom=None, xbin=1, ybin=1, xpos=0, ypos=0):
if name=='hrdet':
ccd=CCD(name='hrdet', xpix=4122, ypix=4112, pix_size=0.015, xpos=0.00, ypos=0.00)
self.detector=Detector(name=name, ccd=[ccd], xbin=xbin, ybin=ybin, \
xpos=xpos, ypos=ypos)
elif name=='hbdet':
ccd=CCD(name='hrdet', xpix=2100, ypix=4112, pix_size=0.015, xpos=0.00, ypos=0.00)
self.detector=Detector(name=name, ccd=[ccd], xbin=xbin, ybin=ybin, \
xpos=xpos, ypos=ypos)
else:
raise SpectrographError('%s is not a supported detector' % name)
def set_grating(self, name=None, order=83):
if name=='hrs':
self.grating=Grating(name='hrs', spacing=41.59, blaze=76.0, order=order)
self.set_order(order)
elif name=='red beam':
self.grating=Grating(name='red beam', spacing=855, blaze=0, order=1)
self.alpha_angle = 17.5
self.set_order(1)
elif name=='blue beam':
self.grating=Grating(name='blue beam', spacing=1850, blaze=0, order=1)
self.alpha = 24.6
self.set_order(1)
else:
raise SpectrographError('%s is not a supported grating' % name)
def set_order(self, order):
self.order=order
self.grating.order = order
def set_slit(self, slitang=2.2):
self.slit=Slit(name='Fiber', phi=slitang)
self.slit.width=self.slit.calc_width(self.telescope.focallength)
def set_slit(self, slitang=2.2):
self.slit=Slit(name='Fiber', phi=slitang)
self.slit.width=self.slit.calc_width(self.telescope.focallength)
