SINFONI Exposure Time Calculator

Infrared Adaptive Optics Spectroscopy Mode Version P104.1
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Target Input Flux Distribution

Template Spectrum Redshift
z =
Target Magnitude and Mag.System:   
= Vega
Magnitudes are given per arcsec2 for extended sources
MARCS Stellar Model
Upload Spectrum
Blackbody Temperature: K
Power Law Index:           F(λ) ∝ λindex
Emission Line
Lambda: nm
Flux: 10-16 ergs/s/cm2 (per arcsec2 for extended sources)
FWHM: nm

Spatial Distribution: Point Source
Extended Source (per pixel)
Extended Source, area Ω: arcsec2

Reference Source Parameters

The ETC will not be able to compute performance estimates when the effective separation between the science target and the guide star is larger than 30"(NGS) or 60" (TTS in LGS), respectively

Adaptive Optics:
noAO AO not enabled
NGS Natural Guide Star Target / Reference Source
Separation: arcsec [0-30]
Reference Source
R mag: [9.3-16.3] B-R color:
LGS Laser Guide Star LGS / TipTilt Star
Separation: arcsec [0-60]
TipTilt Star
R mag: [10-18 (in V)] B-R color:
SE Seeing Enhanced

Sky Conditions

Override almanac sky parameters and use instead typical fixed sky model parameters except Moon phase and airmass
Moon FLI: Airmass:
Time step forward/back

Target coordinates Name or ID:  
α      δ     
UT rise
Hour Angle azimuth altitude zenith distance airmass FLI moon/sun
phase angle
An advanced almanac is available in the ESO SkyCalc sky model calculator
PWV:     mm         Probability % of realising the PWV ≤ 10.00 mm
Seeing/Image Quality:
Seeing: arcsec FWHM in V-band at zenith (use this value in the proposal)
              Probability ---% of realising the seeing ≤ 1.00 arcsec
IQ: arcsec FWHM at the airmass and wavelength of observation (to be used for the OB constraint set)
              The corresponding seeing and probability will be indicated in the ETC output page
Image Quality is not a parameter in AO modes

Instrument Setup

Angular Resolution Scale: milliarcsec
Grating: Note for H+K (R=1500): The reference wavelength lies in a region with low atmospheric transmission and therefore the spectral plot should be activated in order to consult the spectral region of interest.


S/N ratio: S/N = DIT = s
Exposure Time: NDIT =

The total exposure time is the product of DIT (Detector Integration Time) by NDIT (number of DITs). Instrument and telescope overheads are not taken into account.

Plots: Toggle All / No Plots

Resultant spectrum including sky
Object Spectrum only
Sky Emission Spectrum
Sky Radiance Spectrum in physical units (ph/s/m2/micron/arcsec2)
Sky Transmission Spectrum
S/N as a function of wavelength
Total Efficiency and Wavelength Range
Input spectrum in physical units

Debug text output
Show execution time details