Infrared Exposure Time Calculator

VIRCAM Exposure Time Calculator

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IMPORTANT NOTICE
This is the first prototype of VIRCAM ETC. For the time being the ETC offers only a basic functionality. After the end of VISTA Science Verification run the ETC will be reviewed.

Infrared Imaging Mode Version 3.2.7

Description.

F.A.Q

Performance

Input Flux Distribution

Uniform (constant with wavelength)

Target Magnitude and Mag.System:

=		Vega
		AB

Magnitudes are given per arcsec²
for extended sources.

Stellar template spectrum:

Spectral Type :

Blackbody :

Temperature : K

Single Line :

Lambda:	nm
Flux:	10^-16 ergs/s/cm² (per arcsec² for extended sources)
FWHM:	nm

Spatial Distribution:

	Point Source
	Extended Source diameter: arcsec
	Extended Source (per pixel)

Instrument Setup

Filter:

Sky Conditions

Airmass :
Seeing :		arcsec (FWHM in V band)

Observing Setup

Detector on-chip integration time DIT = sec (Note: minimum possible DIT is 1.0 sec)

Exposure Time:

S/N ratio:

Observation Strategy:

	Exposure coadds	(Ndit):
	Exposure loops	(Nexp):
	Microstepping pattern	(NxM):
	Jitter pattern	(Njitter):
	Number of pawprints	(Npaw):

On submission the model can generate the following graphs: (input parameters are replicated in the output page)

	Input spectrum in physical units
	CCD Illumination, Object only
	CCD Illumination, Sky only
	CCD Illumination, Object and Sky
	Sky Transmission Spectrum
	System Efficiency
	S/N as a function of Exposure Time