Esempio n. 1
0
from astropy import units as u

atec = exocounts.InstClass()
atec.lamb = 1.7 * u.micron  #micron
R = 100000.0
atec.dlam = atec.lamb / R  #micron
#atec.dtel = 9.1 #telescope diameter m
atec.dtel = 2.0 * u.m  #telescope diameter m

atec.dstel = 0.00 * u.m  #secondary telescope diameter m
atec.throughput = 0.05
atec.ndark = 0.17 / u.s  #dark current
atec.nread = 14.0  #nr
atec.fullwell = 80000.

target = exocounts.TargetClass()
target.name = "HR8799bcde"
target.teff = 1000.0 * u.K  #K
target.rstar = 0.1 * const.R_sun  #Rsolar
target.d = 39 * u.pc  #pc

obs = exocounts.ObsClass(atec, target)

obs.texposure = 1.0 * 24.0 * 1.0 * u.h  #1 d
obs.tframe = 7.1 * u.s  #time for one frame [sec]
obs.napix = 15  # number of the pixels in aperture
obs.mu = 1
S = 1.8 * 1.8 * np.pi  #core size
obs.effnpix = S / 3.0  #3 is an approx. increment factor of PSF
obs.mu = 1
Esempio n. 2
0
import exocounts
import convmag
import nstar
import numpy as np
from astropy import constants as const
from astropy import units as u

magdict = convmag.get_magdict()

alphacenA = exocounts.TargetClass()
alphacenA.name = "alpha cen A"
alphacenA.teff = 5790.0 * u.K  #K ## optimistic (no cloud)
alphacenA.rstar = 1.2234 * const.R_sun
alphacenA.d = 1.34 * u.pc  #pc

fluxA = nstar.getflux(alphacenA, 10.47 * u.micron)

print(alphacenA.name)
print(fluxA)
print("N mag=", convmag.get_mag("N", fluxA, magdict))

alphacenB = exocounts.TargetClass()
alphacenB.name = "alpha cen B"
alphacenB.teff = 5260.0 * u.K  #K ## optimistic (no cloud)
alphacenB.rstar = 0.8632 * const.R_sun
alphacenB.d = 1.34 * u.pc  #pc

fluxB = nstar.getflux(alphacenB, 10.47 * u.micron)

print(alphacenB.name)
print(fluxB)
Esempio n. 3
0
import exocounts
import convmag
import nstar
import numpy as np
import planet
from astropy import constants as const
from astropy import units as u

lamMIR = 10.47 * u.micron
lamNIR = 1.5 * u.micron
magdict = convmag.get_magdict()

print("=========================")

tauceti = exocounts.TargetClass()
tauceti.name = "tau ceti"
print(tauceti.name)
print("-Emission")

tauceti.teff = 255.0 * u.K  #K ## optimistic (no cloud)
tauceti.rstar = 1.0 * const.R_earth
tauceti.d = 3.65 * u.pc  #pc

fluxB = nstar.getflux(tauceti, lamMIR)
fluxBj = nstar.getfluxJy(tauceti, lamMIR)
fluxBp = nstar.getfluxph(tauceti, lamMIR)

print(fluxB)
print(fluxBj)
print(fluxBp)
print("cts / J", fluxBp.value / fluxB.value)