GMTIFS IFS Performance Calculator
Engineering Mode
IFS Parameters
Spectrograph:
Spaxel Scale
50 mas
25 mas
12 mas
6 mas
Grating
mZJ: R=5000
mJH: R=5000
mHK: R=5000
hZ: R=10000
hJ: R=10000
hH: R-10000
hK: R=10000
Exposure:
Exposure time per coadd
sec. Number of coadds
Adjust exposure time and coadds to avoid saturation
Sky frames averaged
Summing aperture diameter
mas
Target:
Magnitude System:
AB mag
Vega mag
Star brightness
mag
AO System Performance:
Good
Typical
Poor
Strehl ratio
Galaxy brightness
mag/arcsec
2
Line brightness
erg/s/cm
2
/arcsec
2
Line FWHM
km/s
Engineering Mode
Spectrograph:
Sky:
Temperature
K
Temperature
°K
Throughput
Emissivity
Detector:
OH continuum
photon/s/m
2
/arcsec
2
/µm
Read noise per Fowler sampling pair
e
-
OH line
photon/s/m
2
/arcsec
2
Dark current
e
-
/s/pix
Telescope:
Quantum efficiency
Temperature
°K
Detector cutoff wavelength
µ
m
Emissivity
Well depth
e
-
Reflectivity
IFS Results
Adopted integration time per coadd
s
Adopted number of coadds
Star signal
e
-
/pix
Fraction of star in aperture
Number of spaxels
Galaxy signal
e
-
/pix
Line signal
e
-
/pix
Sky thermal signal
e
-
/pix
Sky OH continuum signal
e
-
/pix
Sky OH line signal
e
-
/pix
Telescope thermal signal
e
-
/pix
Dewar signal
e
-
/pix
Dark signal
e
-
/pix
Fowler sampling pairs
Total signal
e
-
/pix
Total noise
e
-
/pix
Average Signal-to-noise ratio
/spaxel
Total Signal-to-noise ratio
/aperture
This tool models the performance of the
Giant Magellan Telescope Integral-Field Spectrograph (GMTIFS)
.
Last updated June 2018.
Research School of Astronomy and Astrophysics, The Australian National University.