LUCI - Exposure Time Calculator

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LUCI-1 & 2 zero points are from Jochen Heidt dated 24NOV2016.

Version 1.34.13.5

Telescope Modes

Seeing-limited mode

Diffraction-limited mode

Strehl ratio:

Object Characteristics

Point source

Extended source

Template Spectrum: B0V A0V F0V G0V K0V M0V E0_galaxy Sa_galaxy Sb_galaxy Sc_galaxy uniform Redshift:

Blackbody with T= K

Single line with ...

... Wavelength:
... Flux:
... Width:

micron
erg/s/cm²
Å

Target magnitude (Vega): U B V R I z J H K Ks Br_gam FeII H2 P_beta P_gam J_low J_high Y1 Y2 OH_1060 OH_1190 HeI HKspec zJspec = mag (mag/sq.arcsec for extended sources)

Hardware Characteristics

LUCI 1

LUCI 2

Imaging mode

Spectroscopic mode

Filter: z J H K Ks Br_gam FeII H2 P_beta P_gam J_low J_high Y1 Y2 OH_1060 OH_1190 HeI HKspec zJspec clear

Camera: N1.8 N3.75

Slit width: 0.25 0.50 0.75 1.00 1.50 2.00

Central wavelength of the grating in µm / Number of lines per millimeter: 0.960 / 040 1.250 / 040 1.650 / 040 2.200 / 040 1.175 / 200 1.930 / 200 1.000 / 210 1.250 / 210 1.650 / 210 2.200 / 210

Atmospheric Conditions

Water vapor: 1.00 1.60 3.00 mm

Airmass: 1.00 1.25 1.50 1.75 2.00 2.50

Seeing: arcsec

Sky brightness for the zenith (Vega): mag/sq.arcsec
uniform flux density distribution, no sky lines

Background file with 1.6 mm water vapor and selected airmass

Theoretical background spectrum

Parameters of Exposure

SNR

Total exposure time sec

Detector Integration Time (DIT): sec (the minimum DIT is 2.50 sec)